app_for_indeed/App for Indeed/Views/DashboardView.swift

//
//  DashboardView.swift
//  App for Indeed
//

import Cocoa
import QuartzCore

final class DashboardView: NSView, NSTextFieldDelegate {
    /// Indeed.com-inspired neutrals and brand blue (white surfaces, `#2557a7` accent, `#2d2d2d` / `#767676` text, `#d4d2d0` borders).
    private enum Theme {
        static let brandBlue = NSColor(srgbRed: 37 / 255, green: 87 / 255, blue: 167 / 255, alpha: 1)
        static let pageBackground = NSColor(srgbRed: 1, green: 1, blue: 1, alpha: 1)
        static let chromeBackground = NSColor(srgbRed: 247 / 255, green: 247 / 255, blue: 247 / 255, alpha: 1)
        static let sidebarBackground = NSColor(srgbRed: 1, green: 1, blue: 1, alpha: 1)
        static let mainHostBackground = NSColor(srgbRed: 1, green: 1, blue: 1, alpha: 1)
        /// Subtitle on the welcome hero: readable blue-gray aligned with brand.
        static let welcomeSubtitleText = NSColor(srgbRed: 52 / 255, green: 92 / 255, blue: 142 / 255, alpha: 1)
        static let selectionFill = NSColor(srgbRed: 37 / 255, green: 87 / 255, blue: 167 / 255, alpha: 0.12)
        static let cardBackground = NSColor(srgbRed: 1, green: 1, blue: 1, alpha: 1)
        static let toggleBackground = NSColor(srgbRed: 232 / 255, green: 232 / 255, blue: 232 / 255, alpha: 1)
        static let primaryText = NSColor(srgbRed: 45 / 255, green: 45 / 255, blue: 45 / 255, alpha: 1)
        static let secondaryText = NSColor(srgbRed: 118 / 255, green: 118 / 255, blue: 118 / 255, alpha: 1)
        static let tertiaryText = NSColor(srgbRed: 118 / 255, green: 118 / 255, blue: 118 / 255, alpha: 1)
        static let border = NSColor(srgbRed: 212 / 255, green: 210 / 255, blue: 208 / 255, alpha: 1)
        /// Job search bar outer stroke (charcoal).
        static let searchBarBorder = NSColor(srgbRed: 58 / 255, green: 58 / 255, blue: 58 / 255, alpha: 1)
        static let proCardFill = NSColor(srgbRed: 239 / 255, green: 244 / 255, blue: 252 / 255, alpha: 1)
        static let proCardBorder = NSColor(srgbRed: 212 / 255, green: 210 / 255, blue: 208 / 255, alpha: 1)
        static let proAccent = NSColor(srgbRed: 37 / 255, green: 87 / 255, blue: 167 / 255, alpha: 1)
        static let proCTABackground = NSColor(srgbRed: 37 / 255, green: 87 / 255, blue: 167 / 255, alpha: 1)
        static let proCTAText = NSColor(srgbRed: 1, green: 1, blue: 1, alpha: 1)
        /// Slightly lighter blue for the top of the search-bar “Find jobs” pill (reads less flat than a solid fill).
        static let findJobsCTAHighlight = NSColor(srgbRed: 54 / 255, green: 110 / 255, blue: 198 / 255, alpha: 1)
    }

    private let contentStack = NSStackView()
    private let chromeContainer = NSView()
    private let sidebar = NSStackView()
    private let mainHost = NSView()
    private let mainOverlay = NSStackView()
    private let greetingLabel = NSTextField(labelWithString: "")
    private let subtitleLabel = NSTextField(labelWithString: "")
    private let searchBarShadowHost = NSView()
    private let searchCard = NSView()
    private let jobSearchIcon = NSImageView()
    private let jobKeywordsField = NSTextField()
    private let findJobsButton = NSButton()
    private let findJobsCTAHost = NSView()
    private let findJobsCTAChrome = NSView()
    private var findJobsCTAGradientLayer: CAGradientLayer?
    private let jobListingsScrollView = NSScrollView()
    /// Flipped so short result lists stay visually under the search bar instead of leaving a gap above the cards.
    private let jobListingsContainer = JobListingsDocumentView()
    private let jobListingsStack = NSStackView()
    /// Shown when a sidebar item other than Home is selected.
    private let nonHomeHost = NSView()
    private let nonHomeTitleLabel = NSTextField(labelWithString: "")
    private let nonHomeSubtitleLabel = NSTextField(wrappingLabelWithString: "")

    private var currentSidebarItems: [SidebarItem] = []
    private var selectedSidebarIndex: Int = 0
    /// Full list from `DashboardData`; results are shown after the user runs a search.
    private var catalogJobListings: [JobListing] = []

    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        setupLayout()
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupLayout()
    }

    override func layout() {
        super.layout()
        updateSearchBarShadowPath()
        findJobsCTAGradientLayer?.frame = findJobsCTAChrome.bounds
        updateFindJobsCTAShadowPath()
        updateJobListingDescriptionWidths()
    }

    func render(_ data: DashboardData) {
        greetingLabel.stringValue = "Welcome"
        subtitleLabel.stringValue = data.subtitle
        currentSidebarItems = data.sidebarItems
        if selectedSidebarIndex >= currentSidebarItems.count {
            selectedSidebarIndex = max(0, currentSidebarItems.count - 1)
        }
        configureSidebar()
        catalogJobListings = data.jobListings
        configureJobListings([], noResultsForQuery: nil)
        updateMainContentVisibility()
    }

    private func setupLayout() {
        wantsLayer = true
        layer?.backgroundColor = Theme.pageBackground.cgColor

        contentStack.orientation = .horizontal
        contentStack.spacing = 20
        contentStack.distribution = .fill
        contentStack.translatesAutoresizingMaskIntoConstraints = false
        contentStack.alignment = .height
        contentStack.edgeInsets = NSEdgeInsets(top: 24, left: 24, bottom: 24, right: 24)

        chromeContainer.translatesAutoresizingMaskIntoConstraints = false
        chromeContainer.wantsLayer = true
        chromeContainer.layer?.backgroundColor = Theme.chromeBackground.cgColor
        chromeContainer.layer?.cornerRadius = 0
        addSubview(chromeContainer)
        chromeContainer.addSubview(contentStack)

        sidebar.orientation = .vertical
        sidebar.spacing = 10
        sidebar.distribution = .fill
        sidebar.alignment = .leading
        sidebar.wantsLayer = true
        sidebar.layer?.backgroundColor = Theme.sidebarBackground.cgColor
        sidebar.layer?.cornerRadius = 16
        sidebar.edgeInsets = NSEdgeInsets(top: 18, left: 14, bottom: 18, right: 14)
        sidebar.translatesAutoresizingMaskIntoConstraints = false

        mainHost.translatesAutoresizingMaskIntoConstraints = false
        mainHost.wantsLayer = true
        mainHost.layer?.backgroundColor = Theme.mainHostBackground.cgColor
        mainHost.layer?.cornerRadius = 16
        mainHost.layer?.masksToBounds = true
        sidebar.setContentHuggingPriority(.required, for: .horizontal)
        mainHost.setContentHuggingPriority(.defaultLow, for: .horizontal)

        mainHost.addSubview(mainOverlay)
        configureNonHomePlaceholder()
        mainHost.addSubview(nonHomeHost)

        mainOverlay.orientation = .vertical
        mainOverlay.spacing = 0
        mainOverlay.alignment = .centerX
        mainOverlay.distribution = .fill
        mainOverlay.translatesAutoresizingMaskIntoConstraints = false
        mainOverlay.setContentHuggingPriority(.defaultLow, for: .vertical)

        greetingLabel.font = .systemFont(ofSize: 32, weight: .bold)
        greetingLabel.textColor = Theme.brandBlue
        greetingLabel.alignment = .center
        greetingLabel.maximumNumberOfLines = 1

        subtitleLabel.font = .systemFont(ofSize: 15, weight: .regular)
        subtitleLabel.textColor = Theme.welcomeSubtitleText
        subtitleLabel.alignment = .center
        subtitleLabel.maximumNumberOfLines = 2

        let topInset = NSView()
        topInset.translatesAutoresizingMaskIntoConstraints = false
        topInset.heightAnchor.constraint(equalToConstant: 32).isActive = true

        configureSearchBar()

        let titleBlock = NSStackView(views: [greetingLabel, subtitleLabel])
        titleBlock.orientation = .vertical
        titleBlock.spacing = 10
        titleBlock.alignment = .centerX

        let midSpacer = NSView()
        midSpacer.translatesAutoresizingMaskIntoConstraints = false
        midSpacer.heightAnchor.constraint(equalToConstant: 20).isActive = true

        let listingsTopSpacer = NSView()
        listingsTopSpacer.translatesAutoresizingMaskIntoConstraints = false
        listingsTopSpacer.heightAnchor.constraint(equalToConstant: 12).isActive = true

        jobListingsContainer.translatesAutoresizingMaskIntoConstraints = false
        jobListingsStack.orientation = .vertical
        jobListingsStack.spacing = 14
        // `.leading` keeps cards left-anchored; explicit width constraints below stretch each card across the full row.
        jobListingsStack.alignment = .leading
        jobListingsStack.distribution = .fill
        jobListingsStack.translatesAutoresizingMaskIntoConstraints = false
        jobListingsStack.setContentHuggingPriority(.defaultHigh, for: .vertical)
        jobListingsStack.setHuggingPriority(.defaultLow, for: .horizontal)
        jobListingsContainer.addSubview(jobListingsStack)
        NSLayoutConstraint.activate([
            jobListingsStack.leadingAnchor.constraint(equalTo: jobListingsContainer.leadingAnchor),
            jobListingsStack.trailingAnchor.constraint(equalTo: jobListingsContainer.trailingAnchor),
            jobListingsStack.topAnchor.constraint(equalTo: jobListingsContainer.topAnchor),
            jobListingsStack.bottomAnchor.constraint(equalTo: jobListingsContainer.bottomAnchor)
        ])

        jobListingsScrollView.translatesAutoresizingMaskIntoConstraints = false
        jobListingsScrollView.hasVerticalScroller = true
        jobListingsScrollView.hasHorizontalScroller = false
        jobListingsScrollView.autohidesScrollers = true
        jobListingsScrollView.drawsBackground = false
        jobListingsScrollView.borderType = .noBorder
        jobListingsScrollView.documentView = jobListingsContainer
        jobListingsScrollView.setContentHuggingPriority(.defaultLow, for: .vertical)
        jobListingsScrollView.setContentCompressionResistancePriority(.defaultLow, for: .vertical)

        mainOverlay.addArrangedSubview(topInset)
        mainOverlay.addArrangedSubview(titleBlock)
        mainOverlay.addArrangedSubview(midSpacer)
        mainOverlay.addArrangedSubview(searchBarShadowHost)
        mainOverlay.addArrangedSubview(listingsTopSpacer)
        mainOverlay.addArrangedSubview(jobListingsScrollView)

        contentStack.addArrangedSubview(sidebar)
        contentStack.addArrangedSubview(mainHost)

        NSLayoutConstraint.activate([
            chromeContainer.leadingAnchor.constraint(equalTo: leadingAnchor),
            chromeContainer.trailingAnchor.constraint(equalTo: trailingAnchor),
            chromeContainer.topAnchor.constraint(equalTo: topAnchor),
            chromeContainer.bottomAnchor.constraint(equalTo: bottomAnchor),

            contentStack.leadingAnchor.constraint(equalTo: chromeContainer.leadingAnchor),
            contentStack.trailingAnchor.constraint(equalTo: chromeContainer.trailingAnchor),
            contentStack.topAnchor.constraint(equalTo: chromeContainer.topAnchor),
            contentStack.bottomAnchor.constraint(equalTo: chromeContainer.bottomAnchor),

            sidebar.widthAnchor.constraint(equalToConstant: 218),
            mainHost.widthAnchor.constraint(greaterThanOrEqualToConstant: 720),

            mainOverlay.leadingAnchor.constraint(equalTo: mainHost.leadingAnchor),
            mainOverlay.trailingAnchor.constraint(equalTo: mainHost.trailingAnchor),
            mainOverlay.topAnchor.constraint(equalTo: mainHost.topAnchor),
            mainOverlay.bottomAnchor.constraint(equalTo: mainHost.bottomAnchor, constant: -24),

            nonHomeHost.leadingAnchor.constraint(equalTo: mainHost.leadingAnchor),
            nonHomeHost.trailingAnchor.constraint(equalTo: mainHost.trailingAnchor),
            nonHomeHost.topAnchor.constraint(equalTo: mainHost.topAnchor),
            nonHomeHost.bottomAnchor.constraint(equalTo: mainHost.bottomAnchor, constant: -24),

            searchBarShadowHost.widthAnchor.constraint(equalTo: mainOverlay.widthAnchor, multiplier: 0.92),
            jobListingsScrollView.widthAnchor.constraint(equalTo: mainOverlay.widthAnchor, multiplier: 0.92),

            jobListingsContainer.topAnchor.constraint(equalTo: jobListingsScrollView.contentView.topAnchor),
            jobListingsContainer.leadingAnchor.constraint(equalTo: jobListingsScrollView.contentView.leadingAnchor),
            jobListingsContainer.widthAnchor.constraint(equalTo: jobListingsScrollView.contentView.widthAnchor),

            greetingLabel.leadingAnchor.constraint(equalTo: mainOverlay.leadingAnchor, constant: 24),
            greetingLabel.trailingAnchor.constraint(equalTo: mainOverlay.trailingAnchor, constant: -24),
            subtitleLabel.leadingAnchor.constraint(equalTo: greetingLabel.leadingAnchor),
            subtitleLabel.trailingAnchor.constraint(equalTo: greetingLabel.trailingAnchor)
        ])
    }

    private func updateJobListingDescriptionWidths() {
        let containerWidth = jobListingsContainer.bounds.width
        guard containerWidth > 1 else { return }
        let innerWidth = containerWidth - 32
        var didChange = false
        for card in jobListingsStack.arrangedSubviews {
            guard let desc = card.viewWithTag(502) as? NSTextField else { continue }
            if abs(desc.preferredMaxLayoutWidth - innerWidth) > 0.5 {
                desc.preferredMaxLayoutWidth = innerWidth
                desc.invalidateIntrinsicContentSize()
                didChange = true
            }
        }
        if didChange {
            // Wrapping width changed, so card heights need to recompute against the new intrinsic sizes.
            jobListingsStack.needsLayout = true
        }
    }

    private func configureJobListings(_ jobs: [JobListing], noResultsForQuery: String?) {
        jobListingsStack.arrangedSubviews.forEach {
            jobListingsStack.removeArrangedSubview($0)
            $0.removeFromSuperview()
        }
        if jobs.isEmpty, let query = noResultsForQuery, !query.isEmpty {
            let empty = NSTextField(wrappingLabelWithString: "No jobs match “\(query)”. Try different keywords or browse the full list with an empty search.")
            empty.font = .systemFont(ofSize: 14, weight: .regular)
            empty.textColor = Theme.secondaryText
            empty.alignment = .center
            empty.maximumNumberOfLines = 0
            empty.translatesAutoresizingMaskIntoConstraints = false
            jobListingsStack.addArrangedSubview(empty)
            empty.widthAnchor.constraint(equalTo: jobListingsStack.widthAnchor).isActive = true
            return
        }
        for job in jobs {
            let card = makeJobListingCard(job)
            jobListingsStack.addArrangedSubview(card)
            // Force every card to span the full row instead of hugging its intrinsic content width.
            card.widthAnchor.constraint(equalTo: jobListingsStack.widthAnchor).isActive = true
        }
    }

    private func makeJobListingCard(_ job: JobListing) -> NSView {
        let card = NSView()
        card.translatesAutoresizingMaskIntoConstraints = false
        card.wantsLayer = true
        card.layer?.backgroundColor = Theme.cardBackground.cgColor
        card.layer?.cornerRadius = 12
        card.layer?.borderWidth = 1
        card.layer?.borderColor = Theme.border.cgColor
        card.layer?.masksToBounds = true

        let titleField = NSTextField(labelWithString: job.title)
        titleField.font = .systemFont(ofSize: 16, weight: .semibold)
        titleField.textColor = Theme.primaryText
        titleField.maximumNumberOfLines = 2
        titleField.lineBreakMode = .byWordWrapping
        titleField.translatesAutoresizingMaskIntoConstraints = false

        let descriptionField = NSTextField(wrappingLabelWithString: job.description)
        descriptionField.font = .systemFont(ofSize: 13, weight: .regular)
        descriptionField.textColor = Theme.secondaryText
        descriptionField.maximumNumberOfLines = 0
        descriptionField.tag = 502
        descriptionField.translatesAutoresizingMaskIntoConstraints = false

        let inner = NSStackView(views: [titleField, descriptionField])
        inner.orientation = .vertical
        inner.spacing = 6
        inner.alignment = .leading
        inner.translatesAutoresizingMaskIntoConstraints = false

        card.addSubview(inner)
        NSLayoutConstraint.activate([
            inner.leadingAnchor.constraint(equalTo: card.leadingAnchor, constant: 16),
            inner.trailingAnchor.constraint(equalTo: card.trailingAnchor, constant: -16),
            inner.topAnchor.constraint(equalTo: card.topAnchor, constant: 14),
            inner.bottomAnchor.constraint(equalTo: card.bottomAnchor, constant: -14),

            titleField.leadingAnchor.constraint(equalTo: inner.leadingAnchor),
            titleField.trailingAnchor.constraint(equalTo: inner.trailingAnchor),
            descriptionField.leadingAnchor.constraint(equalTo: inner.leadingAnchor),
            descriptionField.trailingAnchor.constraint(equalTo: inner.trailingAnchor)
        ])

        return card
    }

    private func configureSearchBar() {
        let pillCorner: CGFloat = 27
        let barHeight: CGFloat = 54

        searchBarShadowHost.translatesAutoresizingMaskIntoConstraints = false
        searchBarShadowHost.wantsLayer = true
        searchBarShadowHost.layer?.masksToBounds = false
        searchBarShadowHost.layer?.shadowColor = NSColor.black.withAlphaComponent(0.18).cgColor
        searchBarShadowHost.layer?.shadowOffset = CGSize(width: 0, height: 2)
        searchBarShadowHost.layer?.shadowRadius = 10
        searchBarShadowHost.layer?.shadowOpacity = 1
        searchBarShadowHost.setContentHuggingPriority(.defaultHigh, for: .vertical)

        searchCard.translatesAutoresizingMaskIntoConstraints = false
        searchCard.wantsLayer = true
        searchCard.layer?.backgroundColor = Theme.cardBackground.cgColor
        searchCard.layer?.cornerRadius = pillCorner
        searchCard.layer?.borderWidth = 1
        searchCard.layer?.borderColor = Theme.searchBarBorder.cgColor
        searchCard.layer?.masksToBounds = true

        searchBarShadowHost.addSubview(searchCard)

        func configureField(_ field: NSTextField, placeholder: String) {
            field.translatesAutoresizingMaskIntoConstraints = false
            field.isBordered = false
            field.drawsBackground = false
            field.focusRingType = .none
            field.font = .systemFont(ofSize: 14, weight: .regular)
            field.textColor = Theme.primaryText
            field.delegate = self
            field.placeholderAttributedString = NSAttributedString(
                string: placeholder,
                attributes: [
                    .foregroundColor: Theme.secondaryText,
                    .font: NSFont.systemFont(ofSize: 14, weight: .regular)
                ]
            )
            field.cell?.usesSingleLineMode = true
            field.cell?.wraps = false
            field.cell?.isScrollable = true
            field.target = self
            field.action = #selector(didSubmitSearch)
        }

        jobSearchIcon.translatesAutoresizingMaskIntoConstraints = false
        jobSearchIcon.symbolConfiguration = NSImage.SymbolConfiguration(pointSize: 15, weight: .medium)
        jobSearchIcon.image = NSImage(systemSymbolName: "magnifyingglass", accessibilityDescription: "Job search")
        jobSearchIcon.contentTintColor = Theme.primaryText

        configureField(jobKeywordsField, placeholder: "Job title, keywords, or company")

        let ctaHeight: CGFloat = 42
        let ctaCorner = ctaHeight / 2

        findJobsCTAHost.translatesAutoresizingMaskIntoConstraints = false
        findJobsCTAHost.wantsLayer = true
        findJobsCTAHost.layer?.masksToBounds = false
        findJobsCTAHost.layer?.shadowColor = NSColor.black.cgColor
        findJobsCTAHost.layer?.shadowOpacity = 0.16
        findJobsCTAHost.layer?.shadowOffset = CGSize(width: 0, height: 2)
        findJobsCTAHost.layer?.shadowRadius = 6

        findJobsCTAChrome.translatesAutoresizingMaskIntoConstraints = false
        findJobsCTAChrome.wantsLayer = true
        findJobsCTAChrome.layer?.masksToBounds = true
        findJobsCTAChrome.layer?.cornerRadius = ctaCorner
        if #available(macOS 11.0, *) {
            findJobsCTAChrome.layer?.cornerCurve = .continuous
        }

        let gradient = CAGradientLayer()
        gradient.colors = [Theme.findJobsCTAHighlight.cgColor, Theme.brandBlue.cgColor]
        gradient.startPoint = CGPoint(x: 0.5, y: 1)
        gradient.endPoint = CGPoint(x: 0.5, y: 0)
        findJobsCTAChrome.layer?.addSublayer(gradient)
        findJobsCTAGradientLayer = gradient

        findJobsButton.translatesAutoresizingMaskIntoConstraints = false
        findJobsButton.title = ""
        findJobsButton.attributedTitle = NSAttributedString(
            string: "Find jobs",
            attributes: [
                .font: NSFont.systemFont(ofSize: 14, weight: .semibold),
                .foregroundColor: Theme.proCTAText,
                .kern: 0.35
            ]
        )
        findJobsButton.isBordered = false
        findJobsButton.bezelStyle = .rounded
        findJobsButton.wantsLayer = true
        findJobsButton.layer?.backgroundColor = NSColor.clear.cgColor
        findJobsButton.focusRingType = .none
        findJobsButton.target = self
        findJobsButton.action = #selector(didSubmitSearch)
        findJobsButton.setContentHuggingPriority(.required, for: .horizontal)
        findJobsButton.setContentCompressionResistancePriority(.required, for: .horizontal)

        findJobsCTAHost.addSubview(findJobsCTAChrome)
        findJobsCTAHost.addSubview(findJobsButton)
        NSLayoutConstraint.activate([
            findJobsCTAChrome.leadingAnchor.constraint(equalTo: findJobsCTAHost.leadingAnchor),
            findJobsCTAChrome.trailingAnchor.constraint(equalTo: findJobsCTAHost.trailingAnchor),
            findJobsCTAChrome.topAnchor.constraint(equalTo: findJobsCTAHost.topAnchor),
            findJobsCTAChrome.bottomAnchor.constraint(equalTo: findJobsCTAHost.bottomAnchor),

            findJobsButton.leadingAnchor.constraint(equalTo: findJobsCTAHost.leadingAnchor, constant: 14),
            findJobsButton.trailingAnchor.constraint(equalTo: findJobsCTAHost.trailingAnchor, constant: -14),
            findJobsButton.topAnchor.constraint(equalTo: findJobsCTAHost.topAnchor),
            findJobsButton.bottomAnchor.constraint(equalTo: findJobsCTAHost.bottomAnchor)
        ])

        let keywordsStack = NSStackView(views: [jobSearchIcon, jobKeywordsField])
        keywordsStack.orientation = .horizontal
        keywordsStack.spacing = 10
        keywordsStack.alignment = .centerY
        keywordsStack.translatesAutoresizingMaskIntoConstraints = false
        keywordsStack.edgeInsets = NSEdgeInsets(top: 0, left: 18, bottom: 0, right: 10)
        keywordsStack.setContentHuggingPriority(.defaultLow, for: .horizontal)

        let row = NSStackView(views: [keywordsStack, findJobsCTAHost])
        row.orientation = .horizontal
        row.spacing = 0
        row.alignment = .centerY
        row.distribution = .fill
        row.translatesAutoresizingMaskIntoConstraints = false
        row.edgeInsets = NSEdgeInsets(top: 0, left: 0, bottom: 0, right: 7)

        searchCard.addSubview(row)

        NSLayoutConstraint.activate([
            searchCard.leadingAnchor.constraint(equalTo: searchBarShadowHost.leadingAnchor),
            searchCard.trailingAnchor.constraint(equalTo: searchBarShadowHost.trailingAnchor),
            searchCard.topAnchor.constraint(equalTo: searchBarShadowHost.topAnchor),
            searchCard.bottomAnchor.constraint(equalTo: searchBarShadowHost.bottomAnchor),

            searchBarShadowHost.heightAnchor.constraint(equalToConstant: barHeight),

            row.leadingAnchor.constraint(equalTo: searchCard.leadingAnchor),
            row.trailingAnchor.constraint(equalTo: searchCard.trailingAnchor),
            row.topAnchor.constraint(equalTo: searchCard.topAnchor),
            row.bottomAnchor.constraint(equalTo: searchCard.bottomAnchor),

            jobSearchIcon.widthAnchor.constraint(equalToConstant: 18),
            jobSearchIcon.heightAnchor.constraint(equalToConstant: 18),

            findJobsCTAHost.heightAnchor.constraint(equalToConstant: ctaHeight),
            findJobsCTAHost.widthAnchor.constraint(greaterThanOrEqualToConstant: 112)
        ])
    }

    private func updateFindJobsCTAShadowPath() {
        guard findJobsCTAHost.bounds.width > 0, findJobsCTAHost.bounds.height > 0 else { return }
        let r = findJobsCTAHost.bounds
        let radius = min(r.height / 2, r.width / 2)
        findJobsCTAHost.layer?.shadowPath = CGPath(
            roundedRect: r,
            cornerWidth: radius,
            cornerHeight: radius,
            transform: nil
        )
    }

    private func configureNonHomePlaceholder() {
        nonHomeHost.translatesAutoresizingMaskIntoConstraints = false
        nonHomeHost.wantsLayer = true
        nonHomeHost.layer?.backgroundColor = Theme.mainHostBackground.cgColor
        nonHomeHost.isHidden = true

        nonHomeTitleLabel.font = .systemFont(ofSize: 22, weight: .bold)
        nonHomeTitleLabel.textColor = Theme.primaryText
        nonHomeTitleLabel.alignment = .center
        nonHomeTitleLabel.maximumNumberOfLines = 1

        nonHomeSubtitleLabel.font = .systemFont(ofSize: 14, weight: .regular)
        nonHomeSubtitleLabel.textColor = Theme.secondaryText
        nonHomeSubtitleLabel.alignment = .center
        nonHomeSubtitleLabel.maximumNumberOfLines = 0
        nonHomeSubtitleLabel.stringValue = "This area is not available in the preview build. Use Home to search jobs."

        let stack = NSStackView(views: [nonHomeTitleLabel, nonHomeSubtitleLabel])
        stack.orientation = .vertical
        stack.spacing = 10
        stack.alignment = .centerX
        stack.translatesAutoresizingMaskIntoConstraints = false
        nonHomeHost.addSubview(stack)
        NSLayoutConstraint.activate([
            stack.centerXAnchor.constraint(equalTo: nonHomeHost.centerXAnchor),
            stack.centerYAnchor.constraint(equalTo: nonHomeHost.centerYAnchor),
            stack.leadingAnchor.constraint(greaterThanOrEqualTo: nonHomeHost.leadingAnchor, constant: 32),
            stack.trailingAnchor.constraint(lessThanOrEqualTo: nonHomeHost.trailingAnchor, constant: -32),
            nonHomeSubtitleLabel.widthAnchor.constraint(lessThanOrEqualToConstant: 420)
        ])
    }

    private func isHomeSidebarIndex(_ index: Int) -> Bool {
        guard index >= 0, index < currentSidebarItems.count else { return false }
        return currentSidebarItems[index].title == "Home"
    }

    private func updateMainContentVisibility() {
        let home = isHomeSidebarIndex(selectedSidebarIndex)
        mainOverlay.isHidden = !home
        nonHomeHost.isHidden = home
        if !home, selectedSidebarIndex < currentSidebarItems.count {
            nonHomeTitleLabel.stringValue = currentSidebarItems[selectedSidebarIndex].title
        }
    }

    /// Removes result cards or the “no matches” message so a new search starts from a blank listing area.
    private func clearJobSearchResultsUI() {
        configureJobListings([], noResultsForQuery: nil)
        if let doc = jobListingsScrollView.documentView {
            doc.scroll(NSPoint(x: 0, y: 0))
        }
    }

    /// Restores the main job-search experience: cleared query and no listings until the user searches again.
    private func applyHomeState() {
        jobKeywordsField.stringValue = ""
        clearJobSearchResultsUI()
        window?.makeFirstResponder(nil)
    }

    private func updateSearchBarShadowPath() {
        guard searchBarShadowHost.bounds.width > 0, searchBarShadowHost.bounds.height > 0 else { return }
        let r = searchBarShadowHost.bounds
        let radius = min(r.height / 2, 27)
        searchBarShadowHost.layer?.shadowPath = CGPath(
            roundedRect: r,
            cornerWidth: radius,
            cornerHeight: radius,
            transform: nil
        )
    }

    @objc private func didSubmitSearch() {
        let query = jobKeywordsField.stringValue.trimmingCharacters(in: .whitespacesAndNewlines)
        let results = jobsMatchingSearch(query: query, in: catalogJobListings)
        let noResultsMessage: String? = (!results.isEmpty || query.isEmpty) ? nil : query
        configureJobListings(results, noResultsForQuery: noResultsMessage)
        window?.makeFirstResponder(nil)
    }

    /// Each whitespace-separated token must appear in the title or description (case-insensitive). Empty query returns the full catalog.
    private func jobsMatchingSearch(query: String, in jobs: [JobListing]) -> [JobListing] {
        let tokens = query
            .lowercased()
            .split(whereSeparator: { $0.isWhitespace })
            .map(String.init)
            .filter { !$0.isEmpty }
        guard !tokens.isEmpty else { return jobs }
        return jobs.filter { job in
            let haystack = "\(job.title) \(job.description)".lowercased()
            return tokens.allSatisfy { haystack.contains($0) }
        }
    }

    func controlTextDidBeginEditing(_ obj: Notification) {
        applySearchFieldInsertionPoint(obj.object)
        if (obj.object as? NSTextField) === jobKeywordsField {
            clearJobSearchResultsUI()
        }
    }

    func controlTextDidChange(_ obj: Notification) {
        applySearchFieldInsertionPoint(obj.object)
    }

    func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
        guard control === jobKeywordsField, commandSelector == #selector(NSResponder.insertNewline(_:)) else {
            return false
        }
        didSubmitSearch()
        return true
    }

    private func applySearchFieldInsertionPoint(_ object: Any?) {
        guard let field = object as? NSTextField,
              field === jobKeywordsField,
              let textView = field.window?.fieldEditor(true, for: field) as? NSTextView else { return }
        textView.insertionPointColor = Theme.primaryText
    }

    private func configureSidebar() {
        let items = currentSidebarItems
        sidebar.arrangedSubviews.forEach {
            sidebar.removeArrangedSubview($0)
            $0.removeFromSuperview()
        }

        let brand = NSTextField(labelWithString: "Indeed AI\nJob Finder")
        brand.font = .systemFont(ofSize: 18, weight: .bold)
        brand.textColor = Theme.brandBlue
        brand.alignment = .left
        sidebar.addArrangedSubview(brand)

        let titleToMenuSpacer = NSView()
        titleToMenuSpacer.translatesAutoresizingMaskIntoConstraints = false
        titleToMenuSpacer.heightAnchor.constraint(equalToConstant: 24).isActive = true
        sidebar.addArrangedSubview(titleToMenuSpacer)

        items.enumerated().forEach { index, item in
            let isSelected = index == selectedSidebarIndex

            let rowHost = SidebarNavRowView { [weak self] in
                self?.selectSidebarItem(at: index)
            }
            rowHost.translatesAutoresizingMaskIntoConstraints = false
            rowHost.wantsLayer = true
            rowHost.layer?.cornerRadius = 8
            if isSelected {
                rowHost.layer?.backgroundColor = Theme.selectionFill.cgColor
            }
            rowHost.setAccessibilityLabel(item.title)
            rowHost.setAccessibilityRole(.button)
            rowHost.setAccessibilitySelected(isSelected)

            let row = NSStackView()
            row.orientation = .horizontal
            row.spacing = 8
            row.alignment = .centerY
            row.translatesAutoresizingMaskIntoConstraints = false

            let icon = NSImageView()
            icon.symbolConfiguration = NSImage.SymbolConfiguration(pointSize: 13, weight: .medium)
            icon.image = NSImage(systemSymbolName: item.systemImage, accessibilityDescription: item.title)
            icon.contentTintColor = isSelected ? Theme.brandBlue : Theme.secondaryText

            let text = NSTextField(labelWithString: item.title)
            text.font = .systemFont(ofSize: 14, weight: .medium)
            text.textColor = isSelected ? Theme.brandBlue : Theme.secondaryText
            text.refusesFirstResponder = true

            row.addArrangedSubview(icon)
            row.addArrangedSubview(text)

            if let badge = item.badge {
                let badgeField = NSTextField(labelWithString: badge)
                badgeField.font = .systemFont(ofSize: 11, weight: .semibold)
                badgeField.textColor = Theme.primaryText
                badgeField.wantsLayer = true
                badgeField.layer?.backgroundColor = Theme.toggleBackground.cgColor
                badgeField.layer?.cornerRadius = 8
                badgeField.alignment = .center
                badgeField.maximumNumberOfLines = 1
                badgeField.lineBreakMode = .byClipping
                badgeField.refusesFirstResponder = true
                badgeField.translatesAutoresizingMaskIntoConstraints = false
                badgeField.widthAnchor.constraint(equalToConstant: 42).isActive = true
                row.addArrangedSubview(NSView())
                row.addArrangedSubview(badgeField)
            }

            rowHost.addSubview(row)
            NSLayoutConstraint.activate([
                row.leadingAnchor.constraint(equalTo: rowHost.leadingAnchor, constant: 10),
                row.trailingAnchor.constraint(equalTo: rowHost.trailingAnchor, constant: -10),
                row.topAnchor.constraint(equalTo: rowHost.topAnchor, constant: 8),
                row.bottomAnchor.constraint(equalTo: rowHost.bottomAnchor, constant: -8)
            ])
            rowHost.setContentHuggingPriority(.defaultLow, for: .horizontal)
            sidebar.addArrangedSubview(rowHost)
            let sidebarHorizontalInset = sidebar.edgeInsets.left + sidebar.edgeInsets.right
            rowHost.widthAnchor.constraint(equalTo: sidebar.widthAnchor, constant: -sidebarHorizontalInset).isActive = true
        }

        let sidebarBottomSpacer = NSView()
        sidebarBottomSpacer.translatesAutoresizingMaskIntoConstraints = false
        sidebarBottomSpacer.setContentHuggingPriority(.defaultLow, for: .vertical)
        sidebarBottomSpacer.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
        sidebar.addArrangedSubview(sidebarBottomSpacer)

        let upgradeCard = NSView()
        upgradeCard.translatesAutoresizingMaskIntoConstraints = false
        upgradeCard.wantsLayer = true
        upgradeCard.layer?.backgroundColor = Theme.proCardFill.cgColor
        upgradeCard.layer?.cornerRadius = 14
        upgradeCard.layer?.borderWidth = 1
        upgradeCard.layer?.borderColor = Theme.proCardBorder.cgColor
        upgradeCard.layer?.masksToBounds = true

        let accentBar = NSView()
        accentBar.translatesAutoresizingMaskIntoConstraints = false
        accentBar.wantsLayer = true
        accentBar.layer?.backgroundColor = Theme.proAccent.cgColor

        let inner = NSStackView()
        inner.translatesAutoresizingMaskIntoConstraints = false
        inner.orientation = .vertical
        inner.spacing = 10
        inner.alignment = .centerX

        let proIcon = NSImageView()
        proIcon.translatesAutoresizingMaskIntoConstraints = false
        proIcon.symbolConfiguration = NSImage.SymbolConfiguration(pointSize: 13, weight: .semibold)
        proIcon.image = NSImage(systemSymbolName: "sparkles", accessibilityDescription: nil)
        proIcon.contentTintColor = Theme.proAccent

        let proEyebrow = NSTextField(labelWithString: "Premium")
        proEyebrow.font = .systemFont(ofSize: 11, weight: .heavy)
        proEyebrow.textColor = Theme.proAccent
        proEyebrow.alignment = .center

        let eyebrowRow = NSStackView(views: [proIcon, proEyebrow])
        eyebrowRow.orientation = .horizontal
        eyebrowRow.spacing = 6
        eyebrowRow.alignment = .centerY

        let headline = NSTextField(labelWithString: "Upgrade to Pro")
        headline.font = .systemFont(ofSize: 16, weight: .bold)
        headline.textColor = Theme.primaryText
        headline.alignment = .center

        let upgradeDescription = NSTextField(wrappingLabelWithString: "Unlimited AI matches, smart alerts, and interview prep—all in one place.")
        upgradeDescription.font = .systemFont(ofSize: 12, weight: .regular)
        upgradeDescription.textColor = Theme.secondaryText
        upgradeDescription.alignment = .center
        // Sidebar content width is 190pt (218 − edge insets); card must stay within that band.
        let cardWidth: CGFloat = 186
        let innerContentWidth = cardWidth - 28
        upgradeDescription.preferredMaxLayoutWidth = innerContentWidth

        let upgradeButton = NSButton(title: "Upgrade to Pro", target: self, action: #selector(didTapUpgradeToPro))
        upgradeButton.isBordered = false
        upgradeButton.bezelStyle = .rounded
        upgradeButton.font = .systemFont(ofSize: 13, weight: .bold)
        upgradeButton.contentTintColor = Theme.proCTAText
        upgradeButton.alignment = .center
        upgradeButton.wantsLayer = true
        upgradeButton.layer?.backgroundColor = Theme.proCTABackground.cgColor
        upgradeButton.layer?.cornerRadius = 20
        upgradeButton.translatesAutoresizingMaskIntoConstraints = false
        upgradeButton.heightAnchor.constraint(equalToConstant: 40).isActive = true

        inner.addArrangedSubview(eyebrowRow)
        inner.addArrangedSubview(headline)
        inner.addArrangedSubview(upgradeDescription)
        inner.addArrangedSubview(upgradeButton)

        upgradeCard.addSubview(accentBar)
        upgradeCard.addSubview(inner)

        NSLayoutConstraint.activate([
            upgradeCard.widthAnchor.constraint(equalToConstant: cardWidth),

            accentBar.topAnchor.constraint(equalTo: upgradeCard.topAnchor),
            accentBar.leadingAnchor.constraint(equalTo: upgradeCard.leadingAnchor),
            accentBar.trailingAnchor.constraint(equalTo: upgradeCard.trailingAnchor),
            accentBar.heightAnchor.constraint(equalToConstant: 2),

            inner.leadingAnchor.constraint(equalTo: upgradeCard.leadingAnchor, constant: 14),
            inner.trailingAnchor.constraint(equalTo: upgradeCard.trailingAnchor, constant: -14),
            inner.topAnchor.constraint(equalTo: accentBar.bottomAnchor, constant: 12),
            inner.bottomAnchor.constraint(equalTo: upgradeCard.bottomAnchor, constant: -14),

            upgradeButton.widthAnchor.constraint(equalTo: inner.widthAnchor)
        ])

        sidebar.addArrangedSubview(upgradeCard)
    }

    @objc private func didTapUpgradeToPro() {
        guard let url = URL(string: "https://www.indeed.com") else { return }
        NSWorkspace.shared.open(url)
    }

    private func selectSidebarItem(at index: Int) {
        guard index >= 0, index < currentSidebarItems.count else { return }
        let selectingHome = isHomeSidebarIndex(index)
        if index == selectedSidebarIndex {
            if selectingHome {
                applyHomeState()
            }
            return
        }
        selectedSidebarIndex = index
        configureSidebar()
        updateMainContentVisibility()
        if selectingHome {
            applyHomeState()
        }
    }

}

/// Document view for the job list `NSScrollView`; flipped coordinates keep short result sets aligned to the top of the clip (avoids a large empty band above the cards on macOS).
private final class JobListingsDocumentView: NSView {
    override var isFlipped: Bool { true }
}

/// Captures clicks for the full sidebar pill so icon, label, and padding behave as one tab.
private final class SidebarNavRowView: NSView {
    private let onSelect: () -> Void

    init(onSelect: @escaping () -> Void) {
        self.onSelect = onSelect
        super.init(frame: .zero)
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func hitTest(_ point: NSPoint) -> NSView? {
        guard let superview else { return super.hitTest(point) }
        let local = convert(point, from: superview)
        return bounds.contains(local) ? self : nil
    }

    override func mouseDown(with event: NSEvent) {
        onSelect()
    }

    override func updateTrackingAreas() {
        super.updateTrackingAreas()
        trackingAreas.forEach { removeTrackingArea($0) }
        addTrackingArea(NSTrackingArea(
            rect: bounds,
            options: [.activeInKeyWindow, .mouseEnteredAndExited, .inVisibleRect],
            owner: self,
            userInfo: nil
        ))
    }

    override func mouseEntered(with event: NSEvent) {
        super.mouseEntered(with: event)
        NSCursor.pointingHand.push()
    }

    override func mouseExited(with event: NSEvent) {
        super.mouseExited(with: event)
        NSCursor.pop()
    }
}