import SwiftUI

// MARK: - Pickers

struct CommentTypePicker: View {
    @Binding var selectedType: CommentType

    var body: some View {
        HStack(spacing: 8) {
            ForEach(CommentType.allCases) { type in
                Button {
                    selectedType = type
                } label: {
                    HStack(spacing: 8) {
                        Image(systemName: type.systemImage)
                            .font(.system(size: 12, weight: .semibold))
                            .foregroundStyle(
                                selectedType == type ? AppTheme.accentGreen : AppTheme.textSecondary
                            )
                            .frame(width: 16)

                        VStack(alignment: .leading, spacing: 1) {
                            Text(type.title)
                                .font(.system(size: 11, weight: .semibold))
                                .foregroundStyle(AppTheme.textPrimary)
                            Text(type.subtitle)
                                .font(.system(size: 9))
                                .foregroundStyle(AppTheme.textTertiary)
                                .lineLimit(1)
                        }

                        Spacer(minLength: 0)
                    }
                    .frame(maxWidth: .infinity, alignment: .leading)
                    .padding(.horizontal, 10)
                    .padding(.vertical, 8)
                    .background(
                        RoundedRectangle(cornerRadius: 8)
                            .fill(
                                selectedType == type
                                    ? AppTheme.accentGreen.opacity(0.15)
                                    : AppTheme.panelBackground
                            )
                    )
                    .overlay(
                        RoundedRectangle(cornerRadius: 8)
                            .stroke(
                                selectedType == type
                                    ? AppTheme.accentGreen.opacity(0.5)
                                    : AppTheme.cardBorder,
                                lineWidth: 1
                            )
                    )
                }
                .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)
            }
        }
    }
}

struct CommentIntentPicker: View {
    @Binding var selectedIntent: CommentIntent

    var body: some View {
        LazyVGrid(
            columns: [GridItem(.flexible()), GridItem(.flexible())],
            spacing: 8
        ) {
            ForEach(CommentIntent.allCases) { intent in
                Button {
                    selectedIntent = intent
                } label: {
                    HStack(spacing: 8) {
                        Image(systemName: intent.systemImage)
                            .font(.system(size: 11, weight: .semibold))
                            .foregroundStyle(
                                selectedIntent == intent ? AppTheme.accentGreen : AppTheme.textSecondary
                            )
                            .frame(width: 14)

                        VStack(alignment: .leading, spacing: 1) {
                            Text(intent.title)
                                .font(.system(size: 11, weight: .semibold))
                                .foregroundStyle(AppTheme.textPrimary)
                            Text(intent.subtitle)
                                .font(.system(size: 9))
                                .foregroundStyle(AppTheme.textTertiary)
                                .lineLimit(1)
                        }

                        Spacer(minLength: 0)
                    }
                    .padding(.horizontal, 10)
                    .padding(.vertical, 8)
                    .background(
                        RoundedRectangle(cornerRadius: 8)
                            .fill(
                                selectedIntent == intent
                                    ? AppTheme.accentGreen.opacity(0.15)
                                    : AppTheme.panelBackground
                            )
                    )
                    .overlay(
                        RoundedRectangle(cornerRadius: 8)
                            .stroke(
                                selectedIntent == intent
                                    ? AppTheme.accentGreen.opacity(0.5)
                                    : AppTheme.cardBorder,
                                lineWidth: 1
                            )
                    )
                }
                .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)
            }
        }
    }
}

struct CommentLengthPicker: View {
    @Binding var selectedLength: CommentLength

    var body: some View {
        HStack(spacing: 8) {
            ForEach(CommentLength.allCases) { length in
                Button {
                    selectedLength = length
                } label: {
                    VStack(spacing: 2) {
                        Text(length.title)
                            .font(.system(size: 10, weight: .semibold))
                        Text(length.wordRange)
                            .font(.system(size: 8))
                            .foregroundStyle(
                                selectedLength == length ? .white.opacity(0.8) : AppTheme.textTertiary
                            )
                    }
                    .foregroundStyle(selectedLength == length ? .white : AppTheme.textSecondary)
                    .padding(.horizontal, 12)
                    .padding(.vertical, 8)
                    .frame(maxWidth: .infinity)
                    .background(
                        RoundedRectangle(cornerRadius: 8)
                            .fill(
                                selectedLength == length
                                    ? AppTheme.accentGreen
                                    : AppTheme.panelBackground
                            )
                    )
                    .overlay(
                        RoundedRectangle(cornerRadius: 8)
                            .stroke(AppTheme.cardBorder, lineWidth: 1)
                    )
                }
                .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)
            }
        }
    }
}

struct CommentTonePicker: View {
    @Binding var selectedTone: PostTone

    var body: some View {
        ScrollView(.horizontal, showsIndicators: false) {
            HStack(spacing: 6) {
                ForEach(PostTone.allCases) { tone in
                    Button {
                        selectedTone = tone
                    } label: {
                        Text(tone.title)
                            .font(.system(size: 10, weight: .semibold))
                            .foregroundStyle(selectedTone == tone ? .white : AppTheme.textSecondary)
                            .padding(.horizontal, 10)
                            .padding(.vertical, 6)
                            .background(
                                Capsule()
                                    .fill(
                                        selectedTone == tone
                                            ? AppTheme.accentGreen
                                            : AppTheme.panelBackground
                                    )
                            )
                            .overlay(
                                Capsule()
                                    .stroke(
                                        selectedTone == tone
                                            ? AppTheme.accentGreen.opacity(0.5)
                                            : AppTheme.cardBorder,
                                        lineWidth: 1
                                    )
                            )
                    }
                    .buttonStyle(AppPlainButtonStyle())
                    .hoverOverlay(cornerRadius: 50)
                }
            }
        }
    }
}

struct CommentVariantCountPicker: View {
    @Binding var selectedCount: CommentVariantCount

    var body: some View {
        HStack(spacing: 8) {
            ForEach(CommentVariantCount.allCases) { count in
                Button {
                    selectedCount = count
                } label: {
                    Text(count.label)
                        .font(.system(size: 10, weight: .semibold))
                        .foregroundStyle(selectedCount == count ? .white : AppTheme.textSecondary)
                        .frame(maxWidth: .infinity)
                        .padding(.vertical, 7)
                        .background(
                            RoundedRectangle(cornerRadius: 7)
                                .fill(
                                    selectedCount == count
                                        ? AppTheme.accentGreen
                                        : AppTheme.panelBackground
                                )
                        )
                        .overlay(
                            RoundedRectangle(cornerRadius: 7)
                                .stroke(AppTheme.cardBorder, lineWidth: 1)
                        )
                }
                .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)
            }
        }
    }
}

struct CommentToggleRow: View {
    let title: String
    let subtitle: String
    @Binding var isOn: Bool

    var body: some View {
        Toggle(isOn: $isOn) {
            VStack(alignment: .leading, spacing: 2) {
                Text(title)
                    .font(.system(size: 11, weight: .medium))
                    .foregroundStyle(AppTheme.textPrimary)
                Text(subtitle)
                    .font(.system(size: 9))
                    .foregroundStyle(AppTheme.textTertiary)
            }
        }
        .toggleStyle(.switch)
        .tint(AppTheme.accentGreen)
        .padding(.horizontal, 10)
        .padding(.vertical, 8)
        .hoverOverlay(cornerRadius: 8)
        .hoverCursor()
    }
}

// MARK: - Reddit Etiquette Card

struct RedditCommentEtiquetteCard: View {
    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            HStack(spacing: 6) {
                Image(systemName: "info.circle.fill")
                    .font(.system(size: 11))
                    .foregroundStyle(AppTheme.accentGreen)
                Text("Reddit Comment Tips")
                    .font(.system(size: 11, weight: .semibold))
                    .foregroundStyle(AppTheme.textPrimary)
            }

            VStack(alignment: .leading, spacing: 4) {
                etiquetteRow("10,000 character limit per comment")
                etiquetteRow("Markdown: **bold**, *italic*, > quotes, `code`")
                etiquetteRow("Stay on-topic for the subreddit")
                etiquetteRow("Be civil — disagree with ideas, not people")
                etiquetteRow("Edit with \"Edit:\" to clarify, don't bait-and-switch")
            }
        }
        .padding(12)
        .frame(maxWidth: .infinity, alignment: .leading)
        .background(
            RoundedRectangle(cornerRadius: AppTheme.cornerRadiusSmall)
                .fill(AppTheme.accentGreen.opacity(0.06))
                .overlay(
                    RoundedRectangle(cornerRadius: AppTheme.cornerRadiusSmall)
                        .stroke(AppTheme.accentGreen.opacity(0.2), lineWidth: 1)
                )
        )
    }

    private func etiquetteRow(_ text: String) -> some View {
        HStack(alignment: .top, spacing: 6) {
            Text("•")
                .font(.system(size: 10))
                .foregroundStyle(AppTheme.accentGreen)
            Text(text)
                .font(.system(size: 10))
                .foregroundStyle(AppTheme.textSecondary)
                .fixedSize(horizontal: false, vertical: true)
        }
    }
}

// MARK: - Thread Context Card

struct RedditThreadContextCard: View {
    let postTitle: String
    let postBody: String
    let parentComment: String
    let commentType: CommentType
    let formattedSubreddit: String

    var body: some View {
        VStack(alignment: .leading, spacing: 10) {
            HStack(spacing: 6) {
                Image(systemName: "doc.text")
                    .font(.system(size: 11))
                    .foregroundStyle(AppTheme.accentOrange)
                Text("Thread Context")
                    .font(.system(size: 11, weight: .semibold))
                    .foregroundStyle(AppTheme.textPrimary)
            }

            VStack(alignment: .leading, spacing: 8) {
                contextBlock(
                    label: formattedSubreddit,
                    content: postTitle.isEmpty ? "Post title" : postTitle,
                    isTitle: true
                )

                if !postBody.isEmpty {
                    contextBlock(label: "Post body", content: postBody, isTitle: false)
                }

                if commentType == .reply, !parentComment.isEmpty {
                    contextBlock(label: "Replying to", content: parentComment, isTitle: false, isQuoted: true)
                }
            }
        }
        .padding(12)
        .frame(maxWidth: .infinity, alignment: .leading)
        .background(
            RoundedRectangle(cornerRadius: AppTheme.cornerRadiusSmall)
                .fill(AppTheme.cardBackground)
                .overlay(
                    RoundedRectangle(cornerRadius: AppTheme.cornerRadiusSmall)
                        .stroke(AppTheme.cardBorder, lineWidth: 1)
                )
        )
    }

    private func contextBlock(
        label: String,
        content: String,
        isTitle: Bool,
        isQuoted: Bool = false
    ) -> some View {
        VStack(alignment: .leading, spacing: 4) {
            Text(label)
                .font(.system(size: 9, weight: .semibold))
                .foregroundStyle(AppTheme.textTertiary)

            if isQuoted {
                HStack(spacing: 0) {
                    Rectangle()
                        .fill(AppTheme.accentGreen.opacity(0.5))
                        .frame(width: 3)
                    Text(content)
                        .font(.system(size: 10))
                        .foregroundStyle(AppTheme.textSecondary)
                        .lineLimit(3)
                        .padding(.leading, 8)
                }
                .padding(.vertical, 4)
            } else {
                Text(content)
                    .font(.system(size: isTitle ? 11 : 10, weight: isTitle ? .semibold : .regular))
                    .foregroundStyle(isTitle ? AppTheme.textPrimary : AppTheme.textSecondary)
                    .lineLimit(isTitle ? 2 : 3)
            }
        }
    }
}

// MARK: - Comment Preview

struct RedditCommentPreviewCard: View {
    let commentBody: String
    let formattedSubreddit: String
    let commentType: CommentType
    let parentComment: String
    var isReply: Bool = false

    var body: some View {
        VStack(alignment: .leading, spacing: 0) {
            if commentType == .reply, !parentComment.isEmpty {
                parentCommentRow
                    .padding(.leading, 14)
            }

            commentRow
                .padding(.leading, commentType == .reply ? 28 : 0)
        }
        .background(AppTheme.panelBackground)
        .clipShape(RoundedRectangle(cornerRadius: AppTheme.cornerRadius))
        .overlay(
            RoundedRectangle(cornerRadius: AppTheme.cornerRadius)
                .stroke(AppTheme.cardBorder, lineWidth: 1)
        )
    }

    private var parentCommentRow: some View {
        HStack(alignment: .top, spacing: 8) {
            voteColumn

            VStack(alignment: .leading, spacing: 6) {
                commentHeader(username: "u/OriginalPoster")

                Text(parentComment)
                    .font(.system(size: 11))
                    .foregroundStyle(AppTheme.textSecondary)
                    .lineLimit(3)
                    .fixedSize(horizontal: false, vertical: true)

                commentActions
            }
        }
        .padding(.horizontal, 14)
        .padding(.vertical, 12)
        .opacity(0.7)
    }

    private var commentRow: some View {
        HStack(alignment: .top, spacing: 8) {
            voteColumn

            VStack(alignment: .leading, spacing: 6) {
                commentHeader(username: "u/ReddoraUser")

                if commentBody.isEmpty {
                    Text("Your comment will appear here…")
                        .font(.system(size: 12))
                        .foregroundStyle(AppTheme.textTertiary)
                        .italic()
                } else {
                    PostMarkdownText(text: commentBody, fontSize: 12, color: AppTheme.textPrimary)
                }

                commentActions
            }
        }
        .padding(.horizontal, 14)
        .padding(.vertical, 12)
        .background(
            commentType == .reply
                ? AppTheme.accentGreen.opacity(0.04)
                : Color.clear
        )
    }

    private var voteColumn: some View {
        VStack(spacing: 2) {
            Image(systemName: "arrow.up")
                .font(.system(size: 12, weight: .semibold))
                .foregroundStyle(AppTheme.textTertiary)
            Text("1")
                .font(.system(size: 10, weight: .semibold))
                .foregroundStyle(AppTheme.textSecondary)
            Image(systemName: "arrow.down")
                .font(.system(size: 12, weight: .semibold))
                .foregroundStyle(AppTheme.textTertiary)
        }
        .frame(width: 24)
    }

    private func commentHeader(username: String) -> some View {
        HStack(spacing: 4) {
            Text(username)
                .font(.system(size: 10, weight: .semibold))
                .foregroundStyle(AppTheme.textPrimary)
            Text("·")
                .foregroundStyle(AppTheme.textTertiary)
            Text("just now")
                .font(.system(size: 9))
                .foregroundStyle(AppTheme.textTertiary)
            if commentType == .reply, username == "u/ReddoraUser" {
                Text("·")
                    .foregroundStyle(AppTheme.textTertiary)
                Text(formattedSubreddit)
                    .font(.system(size: 9, weight: .medium))
                    .foregroundStyle(AppTheme.accentGreen)
            }
        }
    }

    private var commentActions: some View {
        HStack(spacing: 12) {
            actionButton("Reply", icon: "arrowshape.turn.up.left")
            actionButton("Share", icon: "square.and.arrow.up")
            actionButton("Award", icon: "seal")
            actionButton("⋯", icon: nil)
        }
        .padding(.top, 2)
    }

    private func actionButton(_ title: String, icon: String?) -> some View {
        HStack(spacing: 4) {
            if let icon {
                Image(systemName: icon)
                    .font(.system(size: 9, weight: .semibold))
            }
            Text(title)
                .font(.system(size: 9, weight: .semibold))
        }
        .foregroundStyle(AppTheme.textTertiary)
    }
}

// MARK: - Variant Row

struct CommentVariantRow: View {
    let variant: CommentVariant
    let isSelected: Bool
    let onSelect: () -> Void
    let onApply: () -> Void

    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            HStack {
                CommentScoreBadge(score: variant.score)

                Text(variant.reasoning)
                    .font(.system(size: 9))
                    .foregroundStyle(AppTheme.textTertiary)
                    .lineLimit(1)

                Spacer()

                HStack(spacing: 6) {
                    Button("Select", action: onSelect)
                        .font(.system(size: 9, weight: .semibold))
                        .foregroundStyle(isSelected ? AppTheme.accentGreen : AppTheme.textSecondary)
                        .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)

                    Button("Apply", action: onApply)
                        .font(.system(size: 9, weight: .semibold))
                        .foregroundStyle(.white)
                        .padding(.horizontal, 8)
                        .padding(.vertical, 4)
                        .background(AppTheme.accentGreen.opacity(0.8))
                        .clipShape(RoundedRectangle(cornerRadius: 5))
                        .buttonStyle(AppPlainButtonStyle())
        .hoverOverlay(cornerRadius: 8)
                }
            }

            Text(variant.body)
                .font(.system(size: 11))
                .foregroundStyle(AppTheme.textSecondary)
                .lineLimit(4)
                .fixedSize(horizontal: false, vertical: true)
        }
        .padding(12)
        .frame(maxWidth: .infinity, alignment: .leading)
        .background(
            RoundedRectangle(cornerRadius: 8)
                .fill(isSelected ? AppTheme.accentGreen.opacity(0.1) : AppTheme.panelBackground)
        )
        .overlay(
            RoundedRectangle(cornerRadius: 8)
                .stroke(
                    isSelected ? AppTheme.accentGreen.opacity(0.4) : AppTheme.cardBorder,
                    lineWidth: 1
                )
        )
        .hoverCard(cornerRadius: 8, isSelected: isSelected)
        .hoverCursor()
        .onTapGesture(perform: onSelect)
    }
}

struct CommentScoreBadge: View {
    let score: Int

    var body: some View {
        Text("\(score)")
            .font(.system(size: 10, weight: .bold))
            .foregroundStyle(scoreColor)
            .padding(.horizontal, 6)
            .padding(.vertical, 3)
            .background(scoreColor.opacity(0.15))
            .clipShape(RoundedRectangle(cornerRadius: 4))
    }

    private var scoreColor: Color {
        switch score {
        case 80...: AppTheme.accentGreen
        case 60..<80: AppTheme.accentYellow
        default: AppTheme.textTertiary
        }
    }
}

struct CommentWriterEmptyState: View {
    let icon: String
    let title: String
    let subtitle: String

    var body: some View {
        VStack(spacing: 10) {
            Image(systemName: icon)
                .font(.system(size: 28))
                .foregroundStyle(AppTheme.accentGreen.opacity(0.6))
            Text(title)
                .font(.system(size: 12, weight: .semibold))
                .foregroundStyle(AppTheme.textPrimary)
            Text(subtitle)
                .font(.system(size: 10))
                .foregroundStyle(AppTheme.textSecondary)
                .multilineTextAlignment(.center)
        }
        .frame(maxWidth: .infinity)
        .padding(.vertical, 32)
    }
}

struct CommentSecondaryButtonStyle: ButtonStyle {
    func makeBody(configuration: Configuration) -> some View {
        AppSecondaryButtonStyle().makeBody(configuration: configuration)
    }
}