/**
 * Create the .implementation scaffold
 */

import { mkdirSync, existsSync } from 'fs';
import { join } from 'path';

interface CreateOptions {
  output?: string;
  force?: boolean;
}

export async function createImplementation(options: CreateOptions): Promise<void> {
  const outputDir = options.output || process.cwd();
  const implDir = join(outputDir, '.implementation');

  // Check if directory exists
  if (existsSync(implDir) && !options.force) {
    console.error(`Directory already exists: ${implDir}`);
    console.error('Use --force to overwrite');
    process.exit(1);
  }

  console.log(`Creating .implementation scaffold...`);
  console.log(`  Location: ${implDir}`);
  console.log('');

  // Create directory structure
  const dirs = [
    implDir,
    join(implDir, 'data'),
    join(implDir, 'data', 'indexes'),
    join(implDir, 'data', 'plans'),
    join(implDir, 'data', 'todos'),
    join(implDir, 'data', 'audits'),
    join(implDir, 'data', 'architecture'),
    join(implDir, 'docs'),
    join(implDir, 'logs'),
  ];

  for (const dir of dirs) {
    mkdirSync(dir, { recursive: true });
  }

  // Create index files in data/indexes
  const indexFiles = [
    { name: 'TODOS.md', content: generateTodosIndex() },
    { name: 'MEMENTOS.md', content: generateMementosIndex() },
    { name: 'PLANS.md', content: generatePlansIndex() },
    { name: 'AUDITS.md', content: generateAuditsIndex() },
  ];

  for (const file of indexFiles) {
    await Bun.write(join(implDir, 'data', 'indexes', file.name), file.content);
  }

  // Create README.md in .implementation
  await Bun.write(join(implDir, 'README.md'), generateReadme());

  console.log('Created structure:');
  console.log('  .implementation/');
  console.log('  ├── data/');
  console.log('  │   ├── indexes/');
  console.log('  │   │   ├── TODOS.md');
  console.log('  │   │   ├── MEMENTOS.md');
  console.log('  │   │   ├── PLANS.md');
  console.log('  │   │   └── AUDITS.md');
  console.log('  │   ├── plans/');
  console.log('  │   ├── todos/');
  console.log('  │   ├── audits/');
  console.log('  │   └── architecture/');
  console.log('  ├── docs/');
  console.log('  ├── logs/');
  console.log('  └── README.md');
  console.log('');
  console.log('Implementation scaffold created successfully!');
}

function generateReadme(): string {
  return `# Implementation

This directory contains project implementation tracking data.

## Structure

- **data/** - Structured data for project tracking
  - **indexes/** - Index files for quick reference
    - TODOS.md - Task index
    - MEMENTOS.md - Important notes and decisions
    - PLANS.md - Implementation plans index
    - AUDITS.md - Audit records index
  - **plans/** - Detailed implementation plans
  - **todos/** - Task lists and checklists
  - **audits/** - Code audits, reviews, security checks
  - **architecture/** - Architecture decisions and diagrams
- **docs/** - Project documentation
- **logs/** - Development logs and session notes

## Usage

This scaffold is designed to help track project development:

1. Add plans to \`data/plans/\` and index them in \`data/indexes/PLANS.md\`
2. Track tasks in \`data/todos/\` and index in \`data/indexes/TODOS.md\`
3. Record important decisions in \`data/indexes/MEMENTOS.md\`
4. Store audit results in \`data/audits/\` and index in \`data/indexes/AUDITS.md\`
5. Keep architecture docs in \`data/architecture/\`

Generated by implementation.
`;
}

function generateTodosIndex(): string {
  return `# Todos Index

Track all project tasks here.

## Active

<!-- Add active todos here -->

## Completed

<!-- Move completed todos here -->

## Backlog

<!-- Add backlog items here -->
`;
}

function generateMementosIndex(): string {
  return `# Mementos

Important notes, decisions, and things to remember.

## Decisions

<!-- Record important decisions here -->

## Notes

<!-- Add important notes here -->

## Reminders

<!-- Add reminders here -->
`;
}

function generatePlansIndex(): string {
  return `# Plans Index

Index of all implementation plans.

## Current

<!-- Add current plans here -->

## Completed

<!-- Move completed plans here -->

## Archived

<!-- Move archived plans here -->
`;
}

function generateAuditsIndex(): string {
  return `# Audits Index

Index of all audits and reviews.

## Recent

<!-- Add recent audits here -->

## Security

<!-- Add security audits here -->

## Code Reviews

<!-- Add code review records here -->
`;
}