const path = require('node:path');
const fs = require('fs-extra');
const { BaseIdeSetup } = require('./_base-ide');
const chalk = require('chalk');
const { UnifiedInstaller, NamingStyle, TemplateType } = require('./shared/unified-installer');
const { customAgentColonName } = require('./shared/path-utils');

/**
 * Crush IDE setup handler
 *
 * Uses the UnifiedInstaller - all the complex artifact collection
 * and writing logic is now centralized.
 */
class CrushSetup extends BaseIdeSetup {
  constructor() {
    super('crush', 'Crush');
    this.configDir = '.crush';
    this.commandsDir = 'commands';
  }

  /**
   * Setup Crush IDE configuration
   * @param {string} projectDir - Project directory
   * @param {string} bmadDir - BMAD installation directory
   * @param {Object} options - Setup options
   */
  async setup(projectDir, bmadDir, options = {}) {
    console.log(chalk.cyan(`Setting up ${this.name}...`));

    // Clean up old BMAD installation first
    await this.cleanup(projectDir);

    // Create .crush/commands directory
    const commandsDir = path.join(projectDir, this.configDir, this.commandsDir);
    await this.ensureDir(commandsDir);

    // Use the unified installer
    // Crush uses flat colon naming (bmad_bmm_pm.md) with no frontmatter (like Codex)
    const installer = new UnifiedInstaller(this.bmadFolderName);
    const counts = await installer.install(
      projectDir,
      bmadDir,
      {
        targetDir: commandsDir,
        namingStyle: NamingStyle.FLAT_COLON,
        templateType: TemplateType.CODEX,
      },
      options.selectedModules || [],
    );

    console.log(chalk.green(`✓ ${this.name} configured:`));
    console.log(chalk.dim(`  - ${counts.agents} agents installed`));
    if (counts.workflows > 0) {
      console.log(chalk.dim(`  - ${counts.workflows} workflow commands generated`));
    }
    if (counts.tasks + counts.tools > 0) {
      console.log(
        chalk.dim(`  - ${counts.tasks + counts.tools} task/tool commands generated (${counts.tasks} tasks, ${counts.tools} tools)`),
      );
    }
    console.log(chalk.dim(`  - Commands directory: ${path.relative(projectDir, commandsDir)}`));
    console.log(chalk.dim('\n  Commands can be accessed via Crush command palette'));

    return {
      success: true,
      agents: counts.agents,
      tasks: counts.tasks,
      tools: counts.tools,
      workflows: counts.workflows,
    };
  }

  /**
   * Cleanup Crush configuration
   */
  async cleanup(projectDir) {
    const commandsDir = path.join(projectDir, this.configDir, this.commandsDir);

    // Remove any bmad* files from the commands directory (cleans up old bmad: and bmad- formats)
    if (await fs.pathExists(commandsDir)) {
      const entries = await fs.readdir(commandsDir);
      for (const entry of entries) {
        if (entry.startsWith('bmad')) {
          await fs.remove(path.join(commandsDir, entry));
        }
      }
    }
    // Also remove legacy bmad folder if it exists
    const bmadFolder = path.join(commandsDir, 'bmad');
    if (await fs.pathExists(bmadFolder)) {
      await fs.remove(bmadFolder);
      console.log(chalk.dim(`Removed BMAD commands from Crush`));
    }
  }

  /**
   * Install a custom agent launcher for Crush
   * @param {string} projectDir - Project directory
   * @param {string} agentName - Agent name (e.g., "fred-commit-poet")
   * @param {string} agentPath - Path to compiled agent (relative to project root)
   * @param {Object} metadata - Agent metadata
   * @returns {Object} Installation result
   */
  async installCustomAgentLauncher(projectDir, agentName, agentPath, metadata) {
    const commandsDir = path.join(projectDir, this.configDir, this.commandsDir);

    // Create .crush/commands directory if it doesn't exist
    await fs.ensureDir(commandsDir);

    // Create custom agent launcher
    const launcherContent = `# ${agentName} Custom Agent

**⚠️ IMPORTANT**: Run @${agentPath} first to load the complete agent!

This is a launcher for the custom BMAD agent "${agentName}".

## Usage
1. First run: \`${agentPath}\` to load the complete agent
2. Then use this command to activate ${agentName}

The agent will follow the persona and instructions from the main agent file.

---

*Generated by BMAD Method*`;

    // Use underscore format: bmad_custom_fred-commit-poet.md
    // Written directly to commands dir (no bmad subfolder)
    const launcherName = customAgentColonName(agentName);
    const launcherPath = path.join(commandsDir, launcherName);

    // Write the launcher file
    await fs.writeFile(launcherPath, launcherContent, 'utf8');

    return {
      ide: 'crush',
      path: path.relative(projectDir, launcherPath),
      command: launcherName.replace('.md', ''),
      type: 'custom-agent-launcher',
    };
  }
}

module.exports = { CrushSetup };