import Cocoa

// MARK: - 权限引导窗口

/// 启动时权限不足时弹出，显示各权限状态并提供跳转按钮
final class PermissionGuideWindow: NSPanel {

    // MARK: - Permission Detection

    static func checkAccessibility() -> Bool {
        return AXIsProcessTrusted()
    }

    // MARK: - Views

    private let titleLabel = NSTextField(labelWithString: "VoiceInput 需要系统权限")
    private let subtitleLabel = NSTextField(labelWithString: "请前往系统设置逐项开启以下权限")
    private let stackView = NSStackView()
    private var accessibilityRow: PermissionRow!
    private var inputMonitoringRow: PermissionRow!

    // MARK: - Timer

    private var pollTimer: Timer?
    private var onAllReady: (() -> Void)?

    // MARK: - Init

    init(onAllReady: @escaping () -> Void) {
        self.onAllReady = onAllReady

        super.init(
            contentRect: NSRect(x: 0, y: 0, width: 420, height: 200),
            styleMask: [.titled, .closable, .nonactivatingPanel],
            backing: .buffered,
            defer: false
        )

        setupUI()
        refreshAccessibility()

        pollTimer = Timer.scheduledTimer(withTimeInterval: 1.5, repeats: true) { [weak self] _ in
            self?.refreshAccessibility()
        }
    }

    // MARK: - UI Setup

    private func setupUI() {
        isFloatingPanel = true
        level = .floating
        isReleasedWhenClosed = false
        title = "权限设置"
        center()

        titleLabel.translatesAutoresizingMaskIntoConstraints = false
        titleLabel.font = .systemFont(ofSize: 16, weight: .bold)
        titleLabel.alignment = .center
        titleLabel.textColor = .labelColor

        subtitleLabel.translatesAutoresizingMaskIntoConstraints = false
        subtitleLabel.font = .systemFont(ofSize: 12, weight: .regular)
        subtitleLabel.alignment = .center
        subtitleLabel.textColor = .secondaryLabelColor

        // 辅助功能行
        accessibilityRow = PermissionRow(
            name: "辅助功能",
            settingURL: "x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility",
            hint: nil
        )

        // 输入监控行 — 不可靠检测，始终手动确认
        inputMonitoringRow = PermissionRow(
            name: "输入监控",
            settingURL: "x-apple.systempreferences:com.apple.preference.security?Privacy_ListenEvent",
            hint: "授权后需重启应用生效"
        )
        inputMonitoringRow.setManual(text: "请手动开启")

        stackView.translatesAutoresizingMaskIntoConstraints = false
        stackView.orientation = .vertical
        stackView.alignment = .leading
        stackView.spacing = 8
        stackView.edgeInsets = NSEdgeInsets(top: 8, left: 24, bottom: 8, right: 24)
        stackView.addArrangedSubview(accessibilityRow)
        stackView.addArrangedSubview(inputMonitoringRow)
        // 两行等宽，保证按钮对齐
        NSLayoutConstraint.activate([
            accessibilityRow.widthAnchor.constraint(equalTo: stackView.widthAnchor),
            inputMonitoringRow.widthAnchor.constraint(equalTo: stackView.widthAnchor)
        ])

        let closeButton = NSButton(title: "关闭应用", target: self, action: #selector(closeApp))
        closeButton.bezelStyle = .rounded
        closeButton.translatesAutoresizingMaskIntoConstraints = false

        guard let contentView = contentView else { return }
        contentView.subviews.forEach { $0.removeFromSuperview() }
        contentView.addSubview(titleLabel)
        contentView.addSubview(subtitleLabel)
        contentView.addSubview(stackView)
        contentView.addSubview(closeButton)

        NSLayoutConstraint.activate([
            titleLabel.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 20),
            titleLabel.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),

            subtitleLabel.topAnchor.constraint(equalTo: titleLabel.bottomAnchor, constant: 4),
            subtitleLabel.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),

            stackView.topAnchor.constraint(equalTo: subtitleLabel.bottomAnchor, constant: 12),
            stackView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 20),
            stackView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -20),

            closeButton.topAnchor.constraint(equalTo: stackView.bottomAnchor, constant: 12),
            closeButton.centerXAnchor.constraint(equalTo: contentView.centerXAnchor),
            closeButton.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -16)
        ])
    }

    // MARK: - Refresh

    private func refreshAccessibility() {
        let granted = Self.checkAccessibility()
        accessibilityRow.setGranted(granted)

        // 辅助功能就绪时关闭也启用（让用户可以关闭并继续）
        // 不自动关闭，用户手动关闭
    }

    // MARK: - Actions

    @objc private func closeApp() {
        pollTimer?.invalidate()
        pollTimer = nil
        close()
        // 关闭窗口后启动 KeyMonitor（不管权限是否全，用户已确认）
        onAllReady?()
    }

    override func close() {
        pollTimer?.invalidate()
        pollTimer = nil
        super.close()
    }
}

// MARK: - 单行视图

private final class PermissionRow: NSView {

    private let nameLabel = NSTextField(labelWithString: "")
    private let statusLabel = NSTextField(labelWithString: "")
    private let settingButton = NSButton(title: "打开设置", target: nil, action: nil)
    private let hintLabel = NSTextField(labelWithString: "")

    private let settingURL: String

    init(name: String, settingURL: String, hint: String?) {
        self.settingURL = settingURL
        super.init(frame: .zero)
        setupUI(name: name, hint: hint)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) not implemented")
    }

    private func setupUI(name: String, hint: String?) {
        translatesAutoresizingMaskIntoConstraints = false

        nameLabel.stringValue = name
        nameLabel.font = .systemFont(ofSize: 14, weight: .medium)
        nameLabel.textColor = .labelColor
        nameLabel.translatesAutoresizingMaskIntoConstraints = false

        statusLabel.font = .systemFont(ofSize: 13, weight: .regular)
        statusLabel.translatesAutoresizingMaskIntoConstraints = false
        statusLabel.setContentHuggingPriority(.defaultHigh, for: .horizontal)

        settingButton.bezelStyle = .rounded
        settingButton.font = .systemFont(ofSize: 12)
        settingButton.controlSize = .small
        settingButton.target = self
        settingButton.action = #selector(openSettings)
        settingButton.translatesAutoresizingMaskIntoConstraints = false

        addSubview(nameLabel)
        addSubview(statusLabel)
        addSubview(settingButton)

        var constraints: [NSLayoutConstraint] = [
            // 名称固定左对齐
            nameLabel.leadingAnchor.constraint(equalTo: leadingAnchor),
            nameLabel.centerYAnchor.constraint(equalTo: centerYAnchor),
            nameLabel.widthAnchor.constraint(equalToConstant: 70),

            // 按钮固定右对齐 — 两行的按钮水平位置一致（都距 trailing 为 0）
            settingButton.trailingAnchor.constraint(equalTo: trailingAnchor),
            settingButton.centerYAnchor.constraint(equalTo: centerYAnchor),
            settingButton.widthAnchor.constraint(equalToConstant: 80),

            // 状态在名称和按钮之间
            statusLabel.leadingAnchor.constraint(equalTo: nameLabel.trailingAnchor, constant: 8),
            statusLabel.centerYAnchor.constraint(equalTo: centerYAnchor),
            statusLabel.trailingAnchor.constraint(lessThanOrEqualTo: settingButton.leadingAnchor, constant: -8),

            // 统一行高 32
            heightAnchor.constraint(equalToConstant: 32)
        ]

        if let hint = hint {
            hintLabel.stringValue = hint
            hintLabel.font = .systemFont(ofSize: 10, weight: .regular)
            hintLabel.textColor = .secondaryLabelColor
            hintLabel.translatesAutoresizingMaskIntoConstraints = false
            addSubview(hintLabel)

            constraints.append(contentsOf: [
                hintLabel.leadingAnchor.constraint(equalTo: statusLabel.leadingAnchor),
                hintLabel.topAnchor.constraint(equalTo: statusLabel.bottomAnchor, constant: 0),
                hintLabel.trailingAnchor.constraint(equalTo: settingButton.leadingAnchor, constant: -8)
            ])
        }

        NSLayoutConstraint.activate(constraints)
    }

    func setGranted(_ granted: Bool) {
        if granted {
            statusLabel.stringValue = "✅ 已就绪"
            statusLabel.textColor = .systemGreen
        } else {
            statusLabel.stringValue = "⛔ 无权限"
            statusLabel.textColor = .systemRed
        }
    }

    func setManual(text: String) {
        statusLabel.stringValue = text
        statusLabel.textColor = .systemOrange
    }

    @objc private func openSettings() {
        if let url = URL(string: settingURL) {
            NSWorkspace.shared.open(url)
        }
    }
}