#!/usr/bin/env node

/**
 *  Project Manager Script - จัดการโปรเจกต์ผ่าน command line
 *  Chahua Development Thailand
 *  CEO: Saharath C.
 */

const fs = require('fs');
const path = require('path');
const { exec } = require('child_process');

class ProjectManager {
    constructor() {
        this.projectsDir = path.join(__dirname, '..', 'projects');
        this.command = process.argv[2];
        this.projectName = process.argv[3];
    }

    async run() {
        switch (this.command) {
            case 'list':
                this.listProjects();
                break;
            case 'install':
            case 'start':
            case 'stop':
            case 'status':
                await this.runProjectAction(this.command, this.projectName);
                break;
            default:
                this.showUsage();
                break;
        }
    }

    listProjects() {
        try {
            if (!fs.existsSync(this.projectsDir)) {
                console.log(' Projects directory not found:', this.projectsDir);
                return;
            }

            const projects = fs.readdirSync(this.projectsDir)
                .filter(item => {
                    const itemPath = path.join(this.projectsDir, item);
                    return fs.statSync(itemPath).isDirectory() && 
                           fs.existsSync(path.join(itemPath, 'package.json'));
                });

            console.log('\n Available NPM Projects:');
            console.log('='.repeat(40));
            
            if (projects.length === 0) {
                console.log(' No projects found with package.json');
                return;
            }

            projects.forEach((project, index) => {
                try {
                    const packagePath = path.join(this.projectsDir, project, 'package.json');
                    const packageData = JSON.parse(fs.readFileSync(packagePath, 'utf8'));
                    
                    console.log(`\n${index + 1}. ${project}`);
                    console.log(`    Name: ${packageData.name || project}`);
                    console.log(`    Description: ${packageData.description || 'No description'}`);
                    console.log(`     Version: ${packageData.version || '1.0.0'}`);
                    console.log(`    Path: ./projects/${project}`);
                    
                    if (packageData.scripts) {
                        const scripts = Object.keys(packageData.scripts);
                        console.log(`    Scripts: ${scripts.join(', ')}`);
                    }
                } catch (error) {
                    console.log(`    Error reading package.json: ${error.message}`);
                }
            });

            console.log('\n Usage Examples:');
            console.log('   npm run project:install <project-name>');
            console.log('   npm run project:start <project-name>');
            console.log('   npm run project:stop <project-name>');
            console.log('   npm run project:status <project-name>');
            
        } catch (error) {
            console.error(' Error listing projects:', error.message);
        }
    }

    async runProjectAction(action, projectName) {
        if (!projectName) {
            console.error(' Project name required');
            console.log('Usage: node scripts/project-manager.js <action> <project-name>');
            return;
        }

        const projectPath = path.join(this.projectsDir, projectName);
        if (!fs.existsSync(projectPath) || !fs.existsSync(path.join(projectPath, 'package.json'))) {
            console.error(` Project not found: ${projectName}`);
            this.listProjects();
            return;
        }

        console.log(` ${action.toUpperCase()}ing project: ${projectName}`);
        console.log('='.repeat(50));

        try {
            if (action === 'install') {
                await this.runNpmCommand(projectPath, 'install');
            } else if (action === 'start') {
                await this.runNpmCommand(projectPath, 'start');
            } else {
                console.log(`ℹ ${action} action would use framework plugin`);
                console.log('For now, use the web UI for stop/status operations');
            }
        } catch (error) {
            console.error(` ${action} failed:`, error.message);
        }
    }

    async runNpmCommand(projectPath, command) {
        return new Promise((resolve, reject) => {
            console.log(` Running: npm ${command} in ${path.basename(projectPath)}`);
            
            const child = exec(`npm ${command}`, { 
                cwd: projectPath,
                maxBuffer: 1024 * 1024 * 10 // 10MB
            });

            child.stdout.on('data', (data) => {
                process.stdout.write(data);
            });

            child.stderr.on('data', (data) => {
                process.stderr.write(data);
            });

            child.on('close', (code) => {
                if (code === 0) {
                    console.log(`\n ${command} completed successfully!`);
                    resolve();
                } else {
                    reject(new Error(`npm ${command} failed with exit code ${code}`));
                }
            });

            child.on('error', reject);
        });
    }

    showUsage() {
        console.log('\n Chahuadev Project Manager');
        console.log('='.repeat(40));
        console.log('Usage: node scripts/project-manager.js <command> [project-name]');
        console.log('\nCommands:');
        console.log('  list                     - List all available projects');
        console.log('  install <project-name>   - Install project dependencies');
        console.log('  start <project-name>     - Start project server');
        console.log('  stop <project-name>      - Stop project server');
        console.log('  status <project-name>    - Check project status');
        console.log('\nExamples:');
        console.log('  node scripts/project-manager.js list');
        console.log('  node scripts/project-manager.js install sample-app');
        console.log('  node scripts/project-manager.js start sample-app');
        console.log('\nNPM Scripts:');
        console.log('  npm run project:list');
        console.log('  npm run project:install sample-app');
        console.log('  npm run project:start sample-app');
    }
}

// Run if called directly
if (require.main === module) {
    const manager = new ProjectManager();
    manager.run().catch(console.error);
}

module.exports = ProjectManager;