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use crate::config::Config;
use crate::database::Database;
use clap::{Parser, Subcommand};
use std::path::PathBuf;

#[derive(Parser)]
#[command(name = "rsp", infer_long_args = true)]
#[command(about = "Rust music player daemon", long_about = None)]
pub struct Cli {
    #[command(subcommand)]
    pub command: Commands,
}

#[derive(Subcommand)]
pub enum Commands {
    /// Start the daemon
    StartDaemon,
    /// Stop the daemon
    StopDaemon,
    /// Restart the daemon (kill existing and start new)
    Restart,
    /// Play a track, album, or artist
    Play {
        /// Add after current track and skip to it
        #[arg(short = 'i', long = "now")]
        now: bool,
        /// Add to queue after current track (don't skip)
        #[arg(short = 'n', long = "next")]
        next: bool,
        #[arg(value_name = "QUERY")]
        query: Option<String>,
    },
    /// Pause playback
    Pause,
    /// Resume playback
    Resume,
    /// Toggle play/pause
    Toggle,
    /// Stop playback
    Stop,
    /// Skip to next track
    Next,
    /// Skip to previous track
    Previous,
    /// Set volume (0-100)
    Volume {
        #[arg(value_name = "LEVEL")]
        level: Option<u8>,
    },
    /// Shuffle mode
    Shuffle {
        #[arg(value_name = "MODE")]
        mode: Option<String>,
    },
    /// Queue management
    Queue {
        #[arg(value_name = "POSITION")]
        position: Option<String>,
        #[arg(value_name = "QUERY")]
        query: Option<String>,
    },
    /// Show player status
    Status,
    /// Scan music paths to populate database
    Scan {
        #[arg(long)]
        force: bool,
        #[arg(long, value_name = "PATHS")]
        paths: Option<Vec<PathBuf>>,
    },
    /// Settings management
    Settings {
        #[command(subcommand)]
        command: SettingsCommands,
    },
}

#[derive(Subcommand)]
pub enum SettingsCommands {
    /// Get a setting value
    Get {
        #[arg(value_name = "KEY")]
        key: String,
    },
    /// Set a setting value
    Set {
        #[arg(value_name = "KEY")]
        key: String,
        #[arg(value_name = "VALUE")]
        value: String,
    },
    /// List all settings
    List,
    /// Unset a setting
    Unset {
        #[arg(value_name = "KEY")]
        key: String,
    },
}

impl Cli {
    pub fn run(&self) -> Result<(), Box<dyn std::error::Error>> {
        match &self.command {
            Commands::StartDaemon => {
                crate::daemon::start_daemon()?;
            }
            Commands::StopDaemon => {
                crate::daemon::stop_daemon()?;
            }
            Commands::Restart => {
                crate::daemon::restart_daemon()?;
            }
            Commands::Play {
                now, next, query, ..
            } => {
                if let Some(q) = query {
                    let pos = if *now {
                        "now"
                    } else if *next {
                        "next"
                    } else {
                        "last"
                    };
                    crate::daemon::send_command(format!("play {} {}", pos, q))?;
                } else {
                    crate::daemon::send_command("play last".to_string())?;
                }
            }
            Commands::Pause => {
                crate::daemon::send_command("pause".to_string())?;
            }
            Commands::Resume => {
                crate::daemon::send_command("resume".to_string())?;
            }
            Commands::Toggle => {
                crate::daemon::send_command("toggle".to_string())?;
            }
            Commands::Stop => {
                crate::daemon::send_command("stop".to_string())?;
            }
            Commands::Next => {
                crate::daemon::send_command("next".to_string())?;
            }
            Commands::Previous => {
                crate::daemon::send_command("previous".to_string())?;
            }
            Commands::Volume { level } => {
                if let Some(l) = level {
                    crate::daemon::send_command(format!("volume {}", l))?;
                } else {
                    crate::daemon::send_command("volume".to_string())?;
                }
            }
            Commands::Shuffle { mode } => {
                if let Some(m) = mode {
                    crate::daemon::send_command(format!("shuffle {}", m))?;
                } else {
                    crate::daemon::send_command("shuffle".to_string())?;
                }
            }
            Commands::Queue { position, query } => match (position, query) {
                (None, None) => {
                    crate::daemon::send_command("queue".to_string())?;
                }
                (pos, Some(q)) => {
                    let pos = pos.as_deref().unwrap_or("last");
                    crate::daemon::send_command(format!("queue {} {}", pos, q))?;
                }
                _ => {}
            },
            Commands::Status => {
                crate::daemon::send_command("status".to_string())?;
            }
            Commands::Scan { force, paths } => {
                let config = Config::load()?;
                let db = Database::open(&config)?;
                if let Some(custom_paths) = paths {
                    db.scan_paths(custom_paths, *force)?;
                } else {
                    db.scan_paths(&config.music_paths, *force)?;
                }
                println!("Scan complete");
            }
            Commands::Settings { command } => {
                let mut config = Config::load()?;
                match command {
                    SettingsCommands::Get { key } => {
                        println!("{}", config.get(key)?);
                    }
                    SettingsCommands::Set { key, value } => {
                        config.set(key, value)?;
                        config.save()?;
                    }
                    SettingsCommands::List => {
                        config.list();
                    }
                    SettingsCommands::Unset { key } => {
                        config.unset(key)?;
                        config.save()?;
                    }
                }
            }
        }
        Ok(())
    }
}