#!/usr/bin/env npx tsx
/**
 * Zhihu Test Suite: Deterministic command testing against v2ex.com.
 *
 * 40 tasks across 5 difficulty layers:
 *   L1 Atomic (10) → L2 Single Page (10) → L3 Multi-Step (10)
 *   → L4 Write Ops (5) → L5 Complex Chain (5)
 *
 * Usage:
 *   npx tsx autoresearch/eval-v2ex.ts                    # Run all tasks
 *   npx tsx autoresearch/eval-v2ex.ts --task zhihu-hot-topics  # Run single task
 *   npx tsx autoresearch/eval-v2ex.ts --layer 1          # Run only Layer 1 (atomic)
 */

import { execSync } from 'node:child_process';
import { readFileSync, writeFileSync, mkdirSync, readdirSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const TASKS_FILE = join(__dirname, 'zhihu-tasks.json');
const RESULTS_DIR = join(__dirname, 'results');

interface BrowseTask {
  name: string;
  steps: string[];
  judge: JudgeCriteria;
  set?: 'test';
  note?: string;
  _comment?: string;
}

type JudgeCriteria =
  | { type: 'contains'; value: string }
  | { type: 'arrayMinLength'; minLength: number }
  | { type: 'nonEmpty' }
  | { type: 'matchesPattern'; pattern: string };

interface TaskResult {
  name: string;
  passed: boolean;
  duration: number;
  error?: string;
  layer: string;
}

// Layer classification by task name
function getLayer(name: string): string {
  const l1 = ['zhihu-open-home', 'zhihu-get-title', 'zhihu-state', 'zhihu-get-url', 'zhihu-scroll-down',
    'zhihu-click-tab-hot', 'zhihu-back-navigation', 'zhihu-wait-page-load', 'zhihu-keys-escape', 'zhihu-screenshot'];
  const l2 = ['zhihu-feed-titles', 'zhihu-hot-list', 'zhihu-hot-metrics', 'zhihu-nav-tabs',
    'zhihu-feed-with-authors', 'zhihu-feed-types', 'zhihu-user-avatar', 'zhihu-search-input-exists'];
  const l3 = ['zhihu-question-title', 'zhihu-question-meta', 'zhihu-first-answer', 'zhihu-answer-votes',
    'zhihu-question-buttons', 'zhihu-multiple-answers', 'zhihu-question-description', 'zhihu-answer-count-number'];
  const l4 = ['zhihu-hot-to-question', 'zhihu-feed-to-question', 'zhihu-question-to-author',
    'zhihu-search-navigate', 'zhihu-topic-page', 'zhihu-user-profile', 'zhihu-question-and-back', 'zhihu-scroll-load-more'];
  const l5 = ['zhihu-upvote-button-find', 'zhihu-follow-question-find', 'zhihu-comment-button-find',
    'zhihu-bookmark-find', 'zhihu-write-answer-btn', 'zhihu-share-find'];
  const l6 = ['zhihu-hot-read-answer-author', 'zhihu-hot-to-author-profile', 'zhihu-multi-hot-topics',
    'zhihu-search-then-read', 'zhihu-question-scroll-answers', 'zhihu-compare-tabs', 'zhihu-user-answers', 'zhihu-topic-questions'];
  const l7 = ['zhihu-search-basic', 'zhihu-search-people', 'zhihu-search-topic',
    'zhihu-search-click-result', 'zhihu-search-filter-answers', 'zhihu-search-and-back'];
  const l8 = ['zhihu-full-browse-workflow', 'zhihu-deep-author-chain', 'zhihu-cross-question-compare',
    'zhihu-search-read-chain', 'zhihu-3-page-chain', 'zhihu-hot-scroll-deep-read'];

  if (l1.includes(name)) return 'L1-atomic';
  if (l2.includes(name)) return 'L2-feed';
  if (l3.includes(name)) return 'L3-question';
  if (l4.includes(name)) return 'L4-navigation';
  if (l5.includes(name)) return 'L5-write';
  if (l6.includes(name)) return 'L6-chain';
  if (l7.includes(name)) return 'L7-search';
  if (l8.includes(name)) return 'L8-complex';
  return 'unknown';
}

function judge(criteria: JudgeCriteria, output: string): boolean {
  try {
    switch (criteria.type) {
      case 'contains':
        return output.toLowerCase().includes(criteria.value.toLowerCase());
      case 'arrayMinLength': {
        try {
          const arr = JSON.parse(output);
          if (Array.isArray(arr)) return arr.length >= criteria.minLength;
        } catch { /* not JSON array */ }
        return false;
      }
      case 'nonEmpty':
        return output.trim().length > 0 && output.trim() !== 'null' && output.trim() !== 'undefined';
      case 'matchesPattern':
        return new RegExp(criteria.pattern).test(output);
      default:
        return false;
    }
  } catch {
    return false;
  }
}

function runCommand(cmd: string, timeout = 30000): string {
  try {
    return execSync(cmd, {
      cwd: join(__dirname, '..'),
      timeout,
      encoding: 'utf-8',
      env: process.env,
      stdio: ['pipe', 'pipe', 'pipe'],
    }).trim();
  } catch (err: any) {
    return err.stdout?.trim() ?? '';
  }
}

function runTask(task: BrowseTask): TaskResult {
  const start = Date.now();
  let lastOutput = '';

  try {
    for (const step of task.steps) {
      lastOutput = runCommand(step);
    }

    const passed = judge(task.judge, lastOutput);

    return {
      name: task.name,
      passed,
      duration: Date.now() - start,
      error: passed ? undefined : `Output: ${lastOutput.slice(0, 150)}`,
      layer: getLayer(task.name),
    };
  } catch (err: any) {
    return {
      name: task.name,
      passed: false,
      duration: Date.now() - start,
      error: err.message?.slice(0, 100),
      layer: getLayer(task.name),
    };
  }
}

function main() {
  const args = process.argv.slice(2);
  const singleTask = args.includes('--task') ? args[args.indexOf('--task') + 1] : null;
  const layerFilter = args.includes('--layer') ? args[args.indexOf('--layer') + 1] : null;

  const raw = JSON.parse(readFileSync(TASKS_FILE, 'utf-8')) as (BrowseTask | { _comment: string })[];
  const allTasks = raw.filter((t): t is BrowseTask => 'name' in t && 'steps' in t);

  let tasks = allTasks;
  if (singleTask) {
    tasks = allTasks.filter(t => t.name === singleTask);
  } else if (layerFilter) {
    const prefix = `L${layerFilter}`;
    tasks = allTasks.filter(t => getLayer(t.name).startsWith(prefix));
  }

  if (tasks.length === 0) {
    console.error(singleTask ? `Task "${singleTask}" not found.` : `No tasks for layer ${layerFilter}.`);
    process.exit(1);
  }

  console.log(`\n🔬 Zhihu Test Suite — ${tasks.length} tasks\n`);

  const results: TaskResult[] = [];

  for (let i = 0; i < tasks.length; i++) {
    const task = tasks[i];
    process.stdout.write(`  [${i + 1}/${tasks.length}] ${task.name}...`);

    const result = runTask(task);
    results.push(result);

    const icon = result.passed ? '✓' : '✗';
    console.log(` ${icon} (${(result.duration / 1000).toFixed(1)}s)`);

    // Close browser between tasks for clean state
    if (i < tasks.length - 1) {
      try { runCommand('opencli browser close'); } catch { /* ignore */ }
    }
  }

  // Final close
  try { runCommand('opencli browser close'); } catch { /* ignore */ }

  // Summary by layer
  const layers = [...new Set(results.map(r => r.layer))].sort();
  const totalPassed = results.filter(r => r.passed).length;
  const totalDuration = results.reduce((s, r) => s + r.duration, 0);

  console.log(`\n${'─'.repeat(50)}`);
  console.log(`  Total:  ${totalPassed}/${results.length}`);
  for (const layer of layers) {
    const layerResults = results.filter(r => r.layer === layer);
    const layerPassed = layerResults.filter(r => r.passed).length;
    console.log(`  ${layer}: ${layerPassed}/${layerResults.length}`);
  }
  console.log(`  Time:   ${Math.round(totalDuration / 60000)}min`);

  const failures = results.filter(r => !r.passed);
  if (failures.length > 0) {
    console.log(`\n  Failures:`);
    for (const f of failures) {
      console.log(`    ✗ [${f.layer}] ${f.name}: ${f.error ?? 'unknown'}`);
    }
  }
  console.log('');

  // Save result
  mkdirSync(RESULTS_DIR, { recursive: true });
  const existing = readdirSync(RESULTS_DIR).filter(f => f.startsWith('zhihu-')).length;
  const roundNum = String(existing + 1).padStart(3, '0');
  const resultPath = join(RESULTS_DIR, `zhihu-${roundNum}.json`);
  writeFileSync(resultPath, JSON.stringify({
    timestamp: new Date().toISOString(),
    score: `${totalPassed}/${results.length}`,
    layers: Object.fromEntries(layers.map(l => {
      const lr = results.filter(r => r.layer === l);
      return [l, `${lr.filter(r => r.passed).length}/${lr.length}`];
    })),
    duration: `${Math.round(totalDuration / 60000)}min`,
    tasks: results,
  }, null, 2), 'utf-8');
  console.log(`  Results saved to: ${resultPath}`);
  console.log(`\nSCORE=${totalPassed}/${results.length}`);
}

main();