// Extract step definitions from feature files and generate a data file with source code

import * as fs from 'fs';
import * as path from 'path';

interface StepDefinition {
  pattern: string;
  keyword: 'Given' | 'When' | 'Then';
  file: string;
  sourceCode: string;
  lineNumber: number;
}

import { Glob } from 'bun';

// Discover all step definition files: shared + module-specific
function discoverStepFiles(): string[] {
  const files: string[] = [];
  // Shared steps
  for (const f of new Glob('src/shared/steps/**/*.steps.ts').scanSync('.')) {
    files.push(f);
  }
  // Module steps
  for (const f of new Glob('src/modules/*/steps/**/*.steps.ts').scanSync('.')) {
    files.push(f);
  }
  return files.sort();
}

const stepFiles = discoverStepFiles();

function extractStepDefinitions(): StepDefinition[] {
  const definitions: StepDefinition[] = [];

  for (const filePath of stepFiles) {
    const fullPath = path.join(process.cwd(), filePath);
    if (!fs.existsSync(fullPath)) continue;

    const content = fs.readFileSync(fullPath, 'utf-8');
    const lines = content.split('\n');
    const fileName = path.basename(filePath);

    // Find step definitions line by line
    for (let i = 0; i < lines.length; i++) {
      const line = lines[i];

      // Match Given/When/Then at the start of a line
      // Handle escaped quotes in patterns (e.g., 'l\'écran contient')
      const match = line?.match(/^(Given|When|Then)\s*\(\s*(['"`])((?:[^\\]|\\.)*?)\2/);
      if (match && match[3]) {
        const keyword = match[1] as 'Given' | 'When' | 'Then';
        // Unescape the pattern (remove backslashes before quotes)
        const pattern = match[3].replace(/\\(['"`])/g, '$1');

        // Extract the full function body
        const sourceCode = extractFunctionBody(lines, i);

        definitions.push({
          pattern,
          keyword,
          file: fileName,
          sourceCode,
          lineNumber: i + 1,
        });
      }
    }
  }

  return definitions;
}

function extractFunctionBody(lines: string[], startLine: number): string {
  // Look for the closing }); which marks the end of a step definition
  for (let i = startLine; i < lines.length; i++) {
    const line = lines[i]?.trim();
    if (line === '});' || line?.endsWith('});')) {
      const extracted = lines.slice(startLine, i + 1);
      return extracted.join('\n');
    }
  }

  // Fallback: return just the start line if we couldn't find the end
  return lines[startLine] || '';
}

async function generateStepDefinitionsFile() {
  const definitions = extractStepDefinitions();

  const findFunctionCode = `export function findStepDefinition(stepText: string): StepDefinitionInfo | null {
  for (const def of stepDefinitions) {
    // Convert Cucumber expression to regex
    // {string} -> "[^"]+"
    // {int} -> \\\\d+
    const regexPattern = def.pattern
      .replace(/\\{string\\}/g, '"[^"]+"')
      .replace(/\\{int\\}/g, '\\\\d+');

    try {
      const regex = new RegExp(regexPattern);
      if (regex.test(stepText)) {
        return def;
      }
    } catch {
      // If pattern fails, try simple includes
      const simplified = def.pattern.replace(/\\{string\\}/g, '').replace(/\\{int\\}/g, '').trim();
      if (stepText.includes(simplified)) {
        return def;
      }
    }
  }
  return null;
}`;

  const output = `// Auto-generated by scripts/extract-step-definitions.ts
// Do not edit manually - run "bun run steps:extract" to regenerate

export interface StepDefinitionInfo {
  pattern: string;
  keyword: 'Given' | 'When' | 'Then';
  file: string;
  sourceCode: string;
  lineNumber: number;
}

export const stepDefinitions: StepDefinitionInfo[] = ${JSON.stringify(definitions, null, 2)};

${findFunctionCode}
`;

  await Bun.write('src/shared/data/stepDefinitions.ts', output);
  console.log(`Generated ${definitions.length} step definitions`);
}

generateStepDefinitionsFile().catch(console.error);