import SwiftUI

// MARK: - CommandMenu

struct XcodeCommands: Commands {
    // CommandMenus don't participate in the environment hierarchy, so we need to shuffle AppState along to the individual Commands manually.
    let appState: AppState
    
    var body: some Commands {
        CommandMenu("Xcode") {
            Group {
                InstallCommand()
                
                Divider()
                
                SelectCommand()
                LaunchCommand()
                RevealCommand()
                CopyPathCommand()
            }
            .environmentObject(appState)
        }
    }
}

// MARK: - Buttons
// These are used for both context menus and commands

struct InstallButton: View {
    @EnvironmentObject var appState: AppState
    let xcode: Xcode?
    
    var body: some View {
        Button(action: uninstallOrInstall) {
            if let xcode = xcode {
                Text(xcode.installed == true ? "Uninstall" : "Install")
            } else {
                Text("Install")
            }
        }
    }
    
    private func uninstallOrInstall() {
        guard let xcode = xcode else { return }
        if xcode.installed {
            appState.xcodeBeingConfirmedForUninstallation = xcode 
        } else {
            appState.install(id: xcode.id)
        }
    }
}

struct SelectButton: View {
    @EnvironmentObject var appState: AppState
    let xcode: Xcode?
    
    var body: some View {
        Button(action: select) {
            Text("Select")
        }
    }
    
    private func select() {
        guard let xcode = xcode else { return }
        appState.select(id: xcode.id)
    }
}

struct LaunchButton: View {
    @EnvironmentObject var appState: AppState
    let xcode: Xcode?
    
    var body: some View {
        Button(action: launch) {
            Text("Launch")
        }
    }
    
    private func launch() {
        guard let xcode = xcode else { return }
        appState.launch(id: xcode.id)
    }
}

struct RevealButton: View {
    @EnvironmentObject var appState: AppState
    let xcode: Xcode?
    
    var body: some View {
        Button(action: reveal) {
            Text("Reveal in Finder")
        }
    }
    
    private func reveal() {
        guard let xcode = xcode else { return }
        appState.reveal(id: xcode.id)
    }
}

struct CopyPathButton: View {
    @EnvironmentObject var appState: AppState
    let xcode: Xcode?
    
    var body: some View {
        Button(action: copyPath) {
            Text("Copy Path")
        }
    }
    
    private func copyPath() {
        guard let xcode = xcode else { return }
        appState.copyPath(id: xcode.id)
    }
}

// MARK: - Commands

struct InstallCommand: View {
    @EnvironmentObject var appState: AppState
    @FocusedValue(\.selectedXcode) private var selectedXcode: SelectedXcode?

    var body: some View {
        InstallButton(xcode: selectedXcode.unwrapped)
            .keyboardShortcut(selectedXcode.unwrapped?.installed == true ? "u" : "i", modifiers: [.command, .option])
            .disabled(selectedXcode.unwrapped == nil)
    }
}

struct SelectCommand: View {
    @EnvironmentObject var appState: AppState
    @FocusedValue(\.selectedXcode) private var selectedXcode: SelectedXcode?

    var body: some View {
        SelectButton(xcode: selectedXcode.unwrapped)
            .keyboardShortcut("s", modifiers: [.command, .option])
            .disabled(selectedXcode.unwrapped?.installed != true)
    }
}

struct LaunchCommand: View {
    @EnvironmentObject var appState: AppState
    @FocusedValue(\.selectedXcode) private var selectedXcode: SelectedXcode?

    var body: some View {
        LaunchButton(xcode: selectedXcode.unwrapped)
            .keyboardShortcut(KeyboardShortcut(.downArrow, modifiers: .command))
            .disabled(selectedXcode.unwrapped?.installed != true)
    }
}

struct RevealCommand: View {
    @EnvironmentObject var appState: AppState
    @FocusedValue(\.selectedXcode) private var selectedXcode: SelectedXcode?

    var body: some View {
        RevealButton(xcode: selectedXcode.unwrapped)
            .keyboardShortcut("r", modifiers: [.command, .option])
            .disabled(selectedXcode.unwrapped?.installed != true)
    }
}

struct CopyPathCommand: View {
    @EnvironmentObject var appState: AppState
    @FocusedValue(\.selectedXcode) private var selectedXcode: SelectedXcode?

    var body: some View {
        CopyPathButton(xcode: selectedXcode.unwrapped)
            .keyboardShortcut("c", modifiers: [.command, .option])
            .disabled(selectedXcode.unwrapped?.installed != true)
    }
}