/**
 * Modification Prompt
 *
 * Interactive prompts for handling user-modified files.
 */

import chalk from 'chalk';
import { confirm, select } from '@inquirer/prompts';
import type { FileModificationStatus } from './file-detector.js';

/**
 * Modification prompt options
 */
export interface ModificationPromptOptions {
  /** Modified file to prompt about */
  file: FileModificationStatus;
  /** Default choice */
  defaultChoice?: 'skip' | 'backup' | 'overwrite';
}

/**
 * Prompt result for single file
 */
export type PromptResult = 'skip' | 'backup' | 'overwrite' | 'cancel';

/**
 * Prompt for single file modification
 *
 * @param options - Prompt options
 * @returns User's choice
 */
export async function promptFileModification(options: ModificationPromptOptions): Promise<PromptResult> {
  const { file } = options;

  console.log('');
  console.log(chalk.yellow('⚠ Modified file detected:'), chalk.bold(path.basename(file.filePath)));
  console.log(chalk.dim(`Path: ${file.filePath}`));
  console.log(chalk.dim(`This file was generated by k0ntext but has been modified.`));
  console.log('');

  const choice = await select<PromptResult>({
    message: 'What would you like to do?',
    choices: [
      {
        name: 'Skip this file (keep current version)',
        value: 'skip',
        description: 'Leave the file as-is and continue'
      },
      {
        name: 'Backup then overwrite',
        value: 'backup',
        description: 'Create a backup of current version, then regenerate'
      },
      {
        name: 'Overwrite without backup',
        value: 'overwrite',
        description: 'Discard current changes and regenerate (no backup)'
      },
      {
        name: 'Cancel generation',
        value: 'cancel',
        description: 'Stop the generation process'
      }
    ],
    default: options.defaultChoice || 'skip'
  });

  return choice;
}

/**
 * Show a summary of modified files
 *
 * @param modifications - Array of modification statuses
 * @returns True if user wants to proceed
 */
export async function showSummary(modifications: FileModificationStatus[]): Promise<boolean> {
  if (modifications.length === 0) {
    return true;
  }

  console.log('');
  console.log(chalk.yellow(`⚠ ${modifications.length} modified file(s) detected:`));
  console.log('');

  for (const mod of modifications) {
    console.log(chalk.dim('  •'), mod.filePath);
  }

  console.log('');

  const proceed = await confirm({
    message: 'These files have custom modifications. Continue?',
    default: false
  });

  return proceed;
}

/**
 * Format modification status for display
 *
 * @param status - Modification status
 * @returns Formatted string
 */
export function formatModificationStatus(status: FileModificationStatus): string {
  const icon = status.isModified ? '⚠' : '✓';
  const modified = status.isModified ? chalk.yellow('modified') : chalk.green('unmodified');
  return `${icon} ${status.filePath} (${modified})`;
}

import path from 'path';