mod commands;

use clap::{Parser, Subcommand, ValueEnum};
use std::path::PathBuf;
use tracing_subscriber::EnvFilter;

#[derive(Parser)]
#[command(name = "doot")]
#[command(about = "A modern dotfiles manager with a typed DSL", long_about = None)]
struct Cli {
    #[command(subcommand)]
    command: Commands,

    /// Increase verbosity (-v = info, -vv = debug, -vvv = trace)
    #[arg(short, long, global = true, action = clap::ArgAction::Count)]
    verbose: u8,

    /// Suppress all log output
    #[arg(short, long, global = true)]
    quiet: bool,

    #[arg(short = 'C', long, global = true)]
    config: Option<PathBuf>,

    /// Log level (overrides -v/-q flags)
    #[arg(long, global = true)]
    log_level: Option<LogLevelArg>,

    /// Log output format
    #[arg(long, global = true, default_value = "text")]
    log_format: LogFormatArg,
}

#[derive(Clone, ValueEnum)]
enum LogLevelArg {
    Trace,
    Debug,
    Info,
    Warn,
    Error,
}

#[derive(Clone, ValueEnum)]
enum LogFormatArg {
    Text,
    Json,
}

#[derive(Subcommand)]
enum Commands {
    Init {
        /// Source directory for dotfiles (default: ~/.config/doot)
        path: Option<PathBuf>,
    },

    Apply {
        #[arg(short = 'n', long)]
        dry_run: bool,

        #[arg(short, long)]
        parallel: bool,
    },

    Diff {
        #[arg(short, long)]
        all: bool,
    },

    Status,

    Check,

    Fmt {
        #[arg(short, long)]
        check: bool,
    },

    Rollback {
        snapshot: Option<String>,
    },

    Snapshot {
        name: String,
    },

    Encrypt {
        file: PathBuf,

        #[arg(short, long)]
        recipient: Option<String>,
    },

    Decrypt {
        file: PathBuf,

        #[arg(short, long)]
        identity: Option<PathBuf>,
    },

    Package {
        #[command(subcommand)]
        action: PackageAction,
    },

    Lsp,

    Tui,

    /// Open source file in editor for a deployed target
    Edit {
        /// Target path or dotfile name (e.g., ~/.config/nvim or nvim)
        target: String,

        /// Apply changes after editing
        #[arg(short, long)]
        apply: bool,

        /// Skip confirmation prompt
        #[arg(short = 'y', long)]
        yes: bool,
    },
}

#[derive(Subcommand)]
enum PackageAction {
    Install,
    Update,
    List,
}

fn main() -> anyhow::Result<()> {
    let cli = Cli::parse();

    // Priority: DOOT_LOG env > --log-level flag > -q/v flags > default (warn)
    let default_level = if let Some(ref level) = cli.log_level {
        match level {
            LogLevelArg::Trace => "trace",
            LogLevelArg::Debug => "debug",
            LogLevelArg::Info => "info",
            LogLevelArg::Warn => "warn",
            LogLevelArg::Error => "error",
        }
    } else if cli.quiet {
        "off"
    } else {
        match cli.verbose {
            0 => "warn",
            1 => "info",
            2 => "debug",
            _ => "trace",
        }
    };

    // Scope doot crates to chosen level, third-party at warn
    // -vvvv+ enables trace for ALL crates including deps
    let default_directive = if default_level == "off" {
        "off".to_string()
    } else if cli.verbose >= 4 {
        default_level.to_string()
    } else {
        format!(
            "doot_cli={l},doot_core={l},doot_lang={l},warn",
            l = default_level
        )
    };

    let env_filter =
        EnvFilter::try_from_env("DOOT_LOG").unwrap_or_else(|_| EnvFilter::new(&default_directive));

    match cli.log_format {
        LogFormatArg::Json => {
            tracing_subscriber::fmt()
                .json()
                .with_env_filter(env_filter)
                .with_target(true)
                .with_writer(std::io::stderr)
                .init();
        }
        LogFormatArg::Text => {
            tracing_subscriber::fmt()
                .with_env_filter(env_filter)
                .with_target(true)
                .with_writer(std::io::stderr)
                .init();
        }
    }

    match cli.command {
        Commands::Init { path } => commands::init::run(path),
        Commands::Apply { dry_run, parallel } => {
            commands::apply::run(cli.config, dry_run, parallel)
        }
        Commands::Diff { all } => commands::diff::run(cli.config, all),
        Commands::Status => commands::status::run(cli.config),
        Commands::Check => commands::check::run(cli.config),
        Commands::Fmt { check } => commands::fmt::run(cli.config, check),
        Commands::Rollback { snapshot } => commands::rollback::run(cli.config, snapshot),
        Commands::Snapshot { name } => commands::snapshot::run(cli.config, name),
        Commands::Encrypt { file, recipient } => commands::encrypt::run(file, recipient),
        Commands::Decrypt { file, identity } => commands::decrypt::run(file, identity),
        Commands::Package { action } => match action {
            PackageAction::Install => commands::package::install(cli.config),
            PackageAction::Update => commands::package::update(),
            PackageAction::List => commands::package::list(cli.config),
        },
        Commands::Lsp => commands::lsp::run(),
        Commands::Tui => commands::tui::run(cli.config),
        Commands::Edit { target, apply, yes } => {
            commands::edit::run(cli.config, target, apply, yes)
        }
    }
}