import AppKit
import SwiftUI
import ShotdeckCore

struct SettingsView: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        Form {
            Section("Hotkey") {
                LabeledContent("Capture", value: "⌥⇧2 — fixed in this version")
            }
            Section("Folders") {
                LabeledContent("Watch folder") {
                    HStack(spacing: 8) {
                        Text(model.watchFolderURL.path)
                            .lineLimit(1)
                            .truncationMode(.middle)
                            .foregroundStyle(.secondary)
                        Button("Choose…") { model.chooseWatchFolder() }
                    }
                }
                LabeledContent("Output folder") {
                    HStack(spacing: 8) {
                        Text(model.outboxURL.path)
                            .lineLimit(1)
                            .truncationMode(.middle)
                            .foregroundStyle(.secondary)
                        Button("Choose…") { model.chooseOutboxFolder() }
                    }
                }
            }
            Section {
                Button("Reveal spool folder") { model.openSpoolFolder() }
            }
        }
        .padding()
        .frame(width: 360)
        .controlSize(.small)
    }
}

extension AppModel: SettingsWindowPresenting {
    private static var settingsWindowController: NSWindowController?

    public func presentSettingsWindow() {
        if let existing = Self.settingsWindowController {
            existing.window?.makeKeyAndOrderFront(nil)
            NSApp.activate()
            return
        }
        let hosting = NSHostingController(rootView: SettingsView().environment(self))
        let window = NSWindow(contentViewController: hosting)
        window.title = "Shotdeck Settings"
        window.styleMask = [.titled, .closable]
        window.isReleasedWhenClosed = false
        window.center()
        let controller = NSWindowController(window: window)
        Self.settingsWindowController = controller
        controller.showWindow(nil)
        NSApp.activate()
    }

    func chooseOutboxFolder() {
        guard let url = chooseDirectory(startingAt: outboxURL) else { return }
        FolderSettings.setOutbox(url)
        setFolderURLs(outbox: url, watch: watchFolderURL)
        setStatus("Output folder set to \(url.lastPathComponent).")
    }

    func chooseWatchFolder() {
        guard let url = chooseDirectory(startingAt: watchFolderURL) else { return }
        FolderSettings.setWatchFolder(url)
        setFolderURLs(outbox: outboxURL, watch: url)
        Task {
            do {
                try await watcher.updateWatchFolder(url)
                setStatus("Watch folder set to \(url.lastPathComponent).")
            } catch {
                setStatus(
                    (error as? ShotdeckError)?.errorDescription ?? "Could not switch the watch folder."
                )
            }
        }
    }

    private func chooseDirectory(startingAt directory: URL) -> URL? {
        let panel = NSOpenPanel()
        panel.canChooseDirectories = true
        panel.canChooseFiles = false
        panel.allowsMultipleSelection = false
        panel.canCreateDirectories = true
        panel.prompt = "Choose"
        panel.directoryURL = directory
        guard panel.runModal() == .OK else { return nil }
        return panel.url
    }
}