use anyhow::{Result, bail};
use std::path::PathBuf;
use colored::*;

use crate::sdk::SdkConfig;
use crate::project::ProjectBuilder;

pub fn create_project(
    name: &str,
    ftc_sdk: Option<&str>,
    android_sdk: Option<&str>,
) -> Result<()> {
    // Validate project name
    if name.is_empty() {
        bail!("Project name cannot be empty");
    }
    
    if !name.chars().all(|c| c.is_alphanumeric() || c == '-' || c == '_') {
        bail!("Project name must contain only alphanumeric characters, hyphens, and underscores");
    }
    
    let project_path = PathBuf::from(name);
    
    // Check if project already exists
    if project_path.exists() {
        bail!(
            "{}\n\nDirectory already exists: {}\n\nTo upgrade: weevil upgrade {}",
            "Project Already Exists".red().bold(),
            project_path.display(),
            name
        );
    }
    
    println!("{}", format!("Creating FTC project: {}", name).bright_green().bold());
    println!();
    
    // Check system health FIRST
    println!("{}", "Checking system prerequisites...".bright_yellow());
    let health = crate::commands::doctor::check_system_health()?;
    
    if !health.is_healthy() {
        println!();
        println!("{}", "═══════════════════════════════════════════════════════════".bright_red());
        println!("{}", "   ✗ System Setup Required".bright_red().bold());
        println!("{}", "═══════════════════════════════════════════════════════════".bright_red());
        println!();
        println!("{}", "Missing required components:".bright_yellow().bold());
        
        if !health.java_ok {
            println!("  {} Java JDK", "✗".red());
        }
        if !health.ftc_sdk_ok {
            println!("  {} FTC SDK", "✗".red());
        }
        if !health.android_sdk_ok {
            println!("  {} Android SDK", "✗".red());
        }
        
        println!();
        println!("{}", "Before creating a project, you need to set up your development environment.".bright_yellow());
        println!();
        println!("{}", "Run this command to install required components:".bright_yellow().bold());
        println!("  {}", "weevil setup".bright_cyan());
        println!();
        println!("{}", "Then try creating your project again:".bright_yellow().bold());
        println!("  {}", format!("weevil new {}", name).bright_cyan());
        println!();
        
        bail!("System setup required");
    }
    
    println!("{} All prerequisites met", "✓".green());
    println!();
    
    // Setup or verify SDK configuration
    let sdk_config = SdkConfig::with_paths(ftc_sdk, android_sdk)?;
    
    println!("{}", "Creating project structure...".bright_yellow());
    
    // Build the project
    let builder = ProjectBuilder::new(name, &sdk_config)?;
    builder.create(&project_path, &sdk_config)?;
    
    println!();
    println!("{}", "═══════════════════════════════════════════════════════════".bright_green());
    println!("{}", format!("   ✓ Project Created: {}", name).bright_green().bold());
    println!("{}", "═══════════════════════════════════════════════════════════".bright_green());
    println!();
    println!("FTC SDK: {}", sdk_config.ftc_sdk_path.display());
    println!("Version: {}", crate::sdk::ftc::get_version(&sdk_config.ftc_sdk_path).unwrap_or_else(|_| "unknown".to_string()));
    println!();
    println!("{}", "Next steps:".bright_yellow().bold());
    println!("  1. {}", format!("cd {}", name).bright_cyan());
    println!("  2. Review README.md for project structure");
    println!("  3. Start coding in src/main/java/robot/");
    println!("  4. Run tests: {}", "./gradlew test".bright_cyan());
    println!("  5. Deploy to robot: {}", format!("weevil deploy {}", name).bright_cyan());
    println!();
    
    Ok(())
}