#![forbid(unsafe_code)]

mod config;
mod detect;
mod diagnose;
mod gui;
mod launcher;
mod proton;
mod service;
mod setup;
mod tray;
mod util;

use anyhow::Result;
use clap::{Parser, Subcommand};
use owo_colors::OwoColorize;
use std::path::PathBuf;

/// Tray-based Wine launcher manager for Linux via umu/Proton-GE.
///
/// Running without a subcommand starts the system tray daemon.
#[derive(Parser)]
#[command(name = "umutray", version, about)]
struct Cli {
    #[command(subcommand)]
    command: Option<Commands>,
}

#[derive(Subcommand)]
enum Commands {
    /// Start the system tray daemon (default when no subcommand given)
    Tray,

    /// Launch a configured launcher
    Launch {
        /// Launcher name (e.g. battlenet, eaapp, epic)
        name: String,
    },

    /// Kill a specific launcher, or every configured one if no name is given
    Kill {
        /// Launcher name (omit to kill all)
        name: Option<String>,
    },

    /// Run health checks on a specific launcher, or all of them
    Diagnose {
        /// Launcher name (omit to check all)
        name: Option<String>,
    },

    /// List configured launchers and whether they're installed / running
    Launchers,

    /// Play a specific game through its launcher's prefix, applying the
    /// per-game overlay flags (gamemode, mangohud, gamescope).
    Play {
        /// Launcher name (e.g. battlenet)
        launcher: String,
        /// Game name (e.g. overwatch)
        game: String,
    },

    /// List configured games per launcher
    Games {
        /// Only show games for this launcher (omit for all)
        launcher: Option<String>,
    },

    /// Open the graphical setup wizard. Omit NAME to pick from the launcher list.
    Setup {
        /// Launcher name (e.g. battlenet). Omit to open the launcher picker.
        name: Option<String>,
    },

    /// Open the graphical dashboard (default when launched from app menu)
    Gui,

    /// Scan common Wine prefix locations for installed launchers
    Detect {
        /// Additional directory to scan (repeatable)
        #[arg(long, value_name = "PATH")]
        dir: Vec<PathBuf>,

        /// Write detected prefix_dirs to config
        #[arg(long)]
        apply: bool,
    },

    /// Download and switch GE-Proton versions
    UpdateProton {
        /// Install the latest release automatically
        #[arg(long)]
        latest: bool,

        /// Install a specific version (e.g. GE-Proton10-34)
        #[arg(long, value_name = "VERSION")]
        version: Option<String>,

        /// List recent releases and exit
        #[arg(long)]
        list: bool,
    },

    /// Show or modify configuration
    Config {
        #[command(subcommand)]
        action: ConfigAction,
    },

    /// Manage the XDG autostart entry that starts the tray on login
    Service {
        #[command(subcommand)]
        action: ServiceAction,
    },
}

#[derive(Subcommand)]
enum ConfigAction {
    /// Print the config file path and current values
    Show,
    /// Print just the config file path
    Path,
    /// Open the config file in $EDITOR
    Edit,
    /// Update global fields. Use `config edit` for per-launcher changes.
    Set {
        /// Default Proton version (e.g. GE-Proton, GE-Proton10-34)
        #[arg(long, value_name = "VERSION")]
        proton_version: Option<String>,

        /// GE-Proton install directory
        #[arg(long, value_name = "PATH")]
        compat_dir: Option<PathBuf>,
    },
    /// Add a new launcher to the config
    AddLauncher {
        /// Short CLI name (e.g. "heroic")
        name: String,

        /// Windows exe path relative to drive_c/ (e.g. "Program Files/Foo/foo.exe")
        #[arg(long, value_name = "PATH")]
        exe_path: PathBuf,

        /// Display name for menus (defaults to NAME)
        #[arg(long)]
        display: Option<String>,

        /// Wine prefix dir (defaults to ~/Games/NAME)
        #[arg(long, value_name = "PATH")]
        prefix_dir: Option<PathBuf>,

        /// umu GAMEID (defaults to "umu-NAME")
        #[arg(long)]
        gameid: Option<String>,

        /// pgrep -f regex (defaults to escaped exe basename)
        #[arg(long)]
        process_pattern: Option<String>,

        /// Optional installer URL
        #[arg(long)]
        installer_url: Option<String>,
    },
    /// Remove a launcher from the config (leaves its prefix on disk)
    RemoveLauncher {
        /// Short CLI name
        name: String,
    },
    /// Add a game under an existing launcher
    AddGame {
        /// Launcher that owns this game
        launcher: String,

        /// Short CLI name for the game (e.g. "overwatch")
        name: String,

        /// Game exe path relative to drive_c/
        #[arg(long, value_name = "PATH")]
        exe_path: PathBuf,

        /// Display name (defaults to NAME)
        #[arg(long)]
        display: Option<String>,

        /// Wrap the game in gamemoderun
        #[arg(long)]
        gamemode: bool,

        /// Set MANGOHUD=1 for the game
        #[arg(long)]
        mangohud: bool,

        /// Enable gamescope with these args (space-separated, e.g. "-f -W 2560")
        #[arg(long, value_name = "ARGS")]
        gamescope: Option<String>,
    },
    /// Remove a game from a launcher
    RemoveGame { launcher: String, name: String },
    /// Toggle per-game overlay flags
    SetGameFlags {
        launcher: String,
        name: String,

        /// true / false — wrap in gamemoderun
        #[arg(long, value_name = "BOOL")]
        gamemode: Option<bool>,

        /// true / false — set MANGOHUD=1
        #[arg(long, value_name = "BOOL")]
        mangohud: Option<bool>,

        /// Enable gamescope with these args (space-separated)
        #[arg(long, value_name = "ARGS", conflicts_with = "no_gamescope")]
        gamescope: Option<String>,

        /// Disable gamescope wrapping
        #[arg(long)]
        no_gamescope: bool,
    },
}

#[derive(Subcommand)]
enum ServiceAction {
    /// Write ~/.config/autostart/umutray.desktop so the tray starts on login (includes app menu entry)
    Install,
    /// Remove the autostart entry and app menu entry
    Uninstall,
    /// Show whether the XDG autostart entry is present
    Status,
    /// Install only the app menu entry
    InstallDesktop,
    /// Remove the app menu entry
    UninstallDesktop,
}

fn main() -> Result<()> {
    let cli = Cli::parse();
    let config = config::Config::load()?;

    match cli.command.unwrap_or(Commands::Tray) {
        Commands::Tray => tray::run(&config)?,

        Commands::Launch { name } => {
            let l = config.find(&name).ok_or_else(|| {
                anyhow::anyhow!("unknown launcher '{name}' — try `umutray launchers`")
            })?;
            launcher::launch(&config, l)?;
        }

        Commands::Kill { name } => match name {
            Some(n) => {
                let l = config.find(&n).ok_or_else(|| {
                    anyhow::anyhow!("unknown launcher '{n}' — try `umutray launchers`")
                })?;
                launcher::kill(l)?;
            }
            None => launcher::kill_all(&config)?,
        },

        Commands::Diagnose { name } => {
            diagnose::run(&config, name.as_deref())?;
        }

        Commands::Launchers => {
            for l in &config.launchers {
                let installed = l.full_exe_path().exists();
                let running = launcher::is_running(l);
                let marker = if installed { "✓".green().bold().to_string() } else { "·".to_string() };
                let state = if running { " (running)" } else { "" };
                println!("  {marker} {:12} {}{}", l.name, l.display, state);
            }
        }

        Commands::Play {
            launcher: lname,
            game: gname,
        } => {
            let l = config.find(&lname).ok_or_else(|| {
                anyhow::anyhow!("unknown launcher '{lname}' — try `umutray launchers`")
            })?;
            let g = l.find_game(&gname).ok_or_else(|| {
                anyhow::anyhow!(
                    "launcher '{lname}' has no game named '{gname}' — try `umutray games {lname}`"
                )
            })?;
            launcher::play_game(&config, l, g)?;
        }

        Commands::Games { launcher: lname } => {
            let launchers: Vec<&config::Launcher> = match &lname {
                Some(n) => vec![config.find(n).ok_or_else(|| {
                    anyhow::anyhow!("unknown launcher '{n}' — try `umutray launchers`")
                })?],
                None => config.launchers.iter().collect(),
            };
            for l in launchers {
                if l.games.is_empty() {
                    println!("  {}: (no games)", l.display);
                    continue;
                }
                println!("  {}:", l.display);
                for g in &l.games {
                    let installed = g.full_exe_path(l).exists();
                    let marker = if installed { "✓".green().bold().to_string() } else { "·".to_string() };
                    let flags = format_game_flags(g);
                    println!("    {marker} {:14} {}{}", g.name, g.display, flags);
                }
            }
        }

        Commands::Setup { name } => match name {
            None => setup::run_new(&config)?,
            Some(n) => {
                let l = config.find(&n).ok_or_else(|| {
                    anyhow::anyhow!(
                        "unknown launcher '{n}' — try `umutray setup` to add it first"
                    )
                })?;
                setup::run(&config, l)?;
            }
        },

        Commands::Gui => gui::run(&config)?,

        Commands::Detect { dir, apply } => {
            detect::run(&config, &dir, apply)?;
        }

        Commands::UpdateProton {
            latest,
            version,
            list,
        } => {
            proton::run(&config, latest, version, list)?;
        }

        Commands::Config { action } => match action {
            ConfigAction::Show => config.show()?,
            ConfigAction::Path => {
                println!("{}", config::Config::config_path()?.display());
            }
            ConfigAction::Edit => config::Config::edit()?,
            ConfigAction::Set {
                proton_version,
                compat_dir,
            } => {
                let mut c = config;
                c.set_globals(proton_version, compat_dir)?;
            }
            ConfigAction::AddLauncher {
                name,
                exe_path,
                display,
                prefix_dir,
                gameid,
                process_pattern,
                installer_url,
            } => {
                let mut c = config;
                c.add_launcher(
                    name,
                    display,
                    exe_path,
                    prefix_dir,
                    gameid,
                    process_pattern,
                    installer_url,
                )?;
            }
            ConfigAction::RemoveLauncher { name } => {
                let mut c = config;
                c.remove_launcher(&name)?;
            }
            ConfigAction::AddGame {
                launcher,
                name,
                exe_path,
                display,
                gamemode,
                mangohud,
                gamescope,
            } => {
                let mut c = config;
                let gs =
                    gamescope.map(|s| s.split_whitespace().map(String::from).collect::<Vec<_>>());
                c.add_game(&launcher, name, display, exe_path, gamemode, mangohud, gs)?;
            }
            ConfigAction::RemoveGame { launcher, name } => {
                let mut c = config;
                c.remove_game(&launcher, &name)?;
            }
            ConfigAction::SetGameFlags {
                launcher,
                name,
                gamemode,
                mangohud,
                gamescope,
                no_gamescope,
            } => {
                // gs_update is Option<Option<Vec<String>>> where:
                //   None              = leave gamescope unchanged
                //   Some(None)        = disable gamescope
                //   Some(Some(args))  = enable gamescope with these CLI args
                let gs_update = if no_gamescope {
                    Some(None)
                } else {
                    gamescope
                        .map(|s| Some(s.split_whitespace().map(String::from).collect::<Vec<_>>()))
                };
                let mut c = config;
                c.set_game_flags(&launcher, &name, gamemode, mangohud, gs_update)?;
            }
        },

        Commands::Service { action } => match action {
            ServiceAction::Install => service::install()?,
            ServiceAction::Uninstall => service::uninstall()?,
            ServiceAction::Status => service::status()?,
            ServiceAction::InstallDesktop => service::install_desktop()?,
            ServiceAction::UninstallDesktop => service::uninstall_desktop()?,
        },
    }

    Ok(())
}

fn format_game_flags(g: &config::Game) -> String {
    let mut tags: Vec<&str> = Vec::new();
    if g.gamemode {
        tags.push("gamemode");
    }
    if g.mangohud {
        tags.push("mangohud");
    }
    if g.gamescope.is_some() {
        tags.push("gamescope");
    }
    if tags.is_empty() {
        String::new()
    } else {
        format!("  [{}]", tags.join(", "))
    }
}