//
//  IndeedLogoView.swift
//  App for Indeed
//

import Cocoa

/// App logo from the asset catalog for splash and branding surfaces.
enum IndeedBrandLogo {
    enum Variant {
        case standard
        case compact
    }

    static func logoImage(variant: Variant = .standard) -> NSImage? {
        switch variant {
        case .standard:
            NSImage(named: NSImage.Name("IndeedLogo"))
        case .compact:
            NSImage(named: NSImage.Name("IndeedLogoSmall"))
        }
    }
}

final class IndeedLogoView: NSView {
    private let imageView = NSImageView()
    private let variant: IndeedBrandLogo.Variant
    private var displayHeight: CGFloat
    private var sizeConstraints: [NSLayoutConstraint] = []

    override var intrinsicContentSize: NSSize {
        NSSize(width: displayHeight, height: displayHeight)
    }

    init(displayHeight: CGFloat = 44, variant: IndeedBrandLogo.Variant = .standard) {
        self.displayHeight = displayHeight
        self.variant = variant
        super.init(frame: .zero)
        setUp()
    }

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

    func setDisplayHeight(_ height: CGFloat) {
        displayHeight = height
        sizeConstraints.forEach { $0.constant = height }
        invalidateIntrinsicContentSize()
    }

    private func setUp() {
        translatesAutoresizingMaskIntoConstraints = false
        setContentHuggingPriority(.required, for: .horizontal)
        setContentHuggingPriority(.required, for: .vertical)
        setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
        setContentCompressionResistancePriority(.defaultLow, for: .vertical)

        imageView.translatesAutoresizingMaskIntoConstraints = false
        imageView.imageScaling = .scaleProportionallyUpOrDown
        imageView.image = IndeedBrandLogo.logoImage(variant: variant)
        addSubview(imageView)

        let width = widthAnchor.constraint(equalToConstant: displayHeight)
        let height = heightAnchor.constraint(equalToConstant: displayHeight)
        sizeConstraints = [width, height]

        NSLayoutConstraint.activate(sizeConstraints + [
            imageView.leadingAnchor.constraint(equalTo: leadingAnchor),
            imageView.trailingAnchor.constraint(equalTo: trailingAnchor),
            imageView.topAnchor.constraint(equalTo: topAnchor),
            imageView.bottomAnchor.constraint(equalTo: bottomAnchor)
        ])
        setAccessibilityElement(true)
        setAccessibilityRole(.image)
        setAccessibilityLabel(AppMarketingLinks.displayName)
    }
}