use clap::{Parser, Subcommand};
use colored::*;
use anyhow::Result;
use weevil::version::WEEVIL_VERSION;

mod commands;
mod sdk;
mod project;
mod templates;

use sdk::proxy::ProxyConfig;

#[derive(Parser)]
#[command(name = "weevil")]
#[command(author = "Eric Ratliff <eric@nxlearn.net>")]
#[command(version = WEEVIL_VERSION)]
#[command(
    about = "FTC robotics project generator - bores into complexity, emerges with clean code",
    long_about = None
)]
struct Cli {
    /// Use this HTTP/HTTPS proxy for all downloads
    #[arg(long, value_name = "URL", global = true)]
    proxy: Option<String>,

    /// Skip proxy entirely — go direct even if HTTPS_PROXY is set
    #[arg(long, global = true)]
    no_proxy: bool,

    #[command(subcommand)]
    command: Commands,
}

#[derive(Subcommand)]
enum Commands {
    /// Create a new FTC robot project
    New {
        /// Name of the robot project
        name: Option<String>,

        /// Path to FTC SDK (optional, will auto-detect or download)
        #[arg(long)]
        ftc_sdk: Option<String>,

        /// Path to Android SDK (optional, will auto-detect or download)
        #[arg(long)]
        android_sdk: Option<String>,

        /// Template to use (basic, testing)
        #[arg(long, short = 't', value_name = "TEMPLATE")]
        template: Option<String>,

        /// List available templates
        #[arg(long, conflicts_with = "name")]
        list_templates: bool,
    },

    /// Check system health and diagnose issues
    Doctor,

    /// Setup development environment (system or project)
    Setup {
        /// Path to project directory (optional - without it, sets up system)
        path: Option<String>,
    },

    /// Remove Weevil-installed SDKs and dependencies
    Uninstall {
        /// Show what would be removed without actually removing anything
        #[arg(long)]
        dry_run: bool,

        /// Remove only specific items by number (use --dry-run first to see the list)
        #[arg(long, value_name = "NUM", num_args = 1..)]
        only: Option<Vec<usize>>,
    },

    /// Upgrade an existing project to the latest generator version
    Upgrade {
        /// Path to the project directory
        path: String,
    },

    /// Build and deploy project to Control Hub
    Deploy {
        /// Path to the project directory
        path: String,

        /// Force USB connection
        #[arg(long)]
        usb: bool,

        /// Force WiFi connection
        #[arg(long)]
        wifi: bool,

        /// Custom IP address
        #[arg(short, long)]
        ip: Option<String>,
    },

    /// Manage SDKs (FTC and Android)
    Sdk {
        #[command(subcommand)]
        command: SdkCommands,
    },

    /// Show or update project configuration
    Config {
        /// Path to the project directory
        path: String,

        /// Set FTC SDK path for this project
        #[arg(long, value_name = "PATH")]
        set_sdk: Option<String>,
    },
}

#[derive(Subcommand)]
enum SdkCommands {
    /// Install required SDKs
    Install,

    /// Show SDK status and locations
    Status,

    /// Update SDKs to latest versions
    Update,
}

fn main() -> Result<()> {
    // Enable colors on Windows
    #[cfg(windows)]
    colored::control::set_virtual_terminal(true).ok();

    let cli = Cli::parse();

    print_banner();

    // Resolve proxy once at the top — every network-touching command uses it.
    let proxy = ProxyConfig::resolve(cli.proxy.as_deref(), cli.no_proxy)?;

    match cli.command {
        Commands::New { name, ftc_sdk, android_sdk, template, list_templates } => {
            if list_templates {
                commands::new::list_templates()
            } else if let Some(project_name) = name {
                commands::new::create_project(
                    &project_name,
                    ftc_sdk.as_deref(),
                    android_sdk.as_deref(),
                    template.as_deref(),
                    &proxy
                )
            } else {
                anyhow::bail!("Project name is required. Use --list-templates to see available templates.");
            }
        }
        Commands::Doctor => {
            commands::doctor::run_diagnostics()
        }
        Commands::Setup { path } => {
            commands::setup::setup_environment(path.as_deref(), &proxy)
        }
        Commands::Uninstall { dry_run, only } => {
            commands::uninstall::uninstall_dependencies(dry_run, only)
        }
        Commands::Upgrade { path } => {
            commands::upgrade::upgrade_project(&path)
        }
        Commands::Deploy { path, usb, wifi, ip } => {
            commands::deploy::deploy_project(&path, usb, wifi, ip.as_deref())
        }
        Commands::Sdk { command } => match command {
            SdkCommands::Install => commands::sdk::install_sdks(&proxy),
            SdkCommands::Status => commands::sdk::show_status(),
            SdkCommands::Update => commands::sdk::update_sdks(&proxy),
        },
        Commands::Config { path, set_sdk } => {
            if let Some(sdk_path) = set_sdk {
                commands::config::set_sdk(&path, &sdk_path)
            } else {
                commands::config::show_config(&path)
            }
        }
    }
}

fn print_banner() {
    println!("{}", "═══════════════════════════════════════════════════════════".bright_cyan());
    println!(
        "{}",
        format!("   🪲 Weevil - FTC Project Generator v{}", WEEVIL_VERSION)
            .bright_cyan()
            .bold()
    );
    println!("{}", "   Nexus Workshops LLC".bright_cyan());
    println!("{}", "═══════════════════════════════════════════════════════════".bright_cyan());
    println!();
}