import path from 'node:path';
import { spawn } from 'node:child_process';
import { fileURLToPath } from 'node:url';

import {
  extractHelpEscalationPagePath,
  extractHelpEscalationSessionId,
} from './help-escalation.mjs';

const repoRoot = path.join(path.dirname(fileURLToPath(import.meta.url)));

function envFlag(value, fallback = true) {
  const raw = String(value ?? '').trim().toLowerCase();
  if (!raw) return fallback;
  return ['1', 'true', 'yes', 'on'].includes(raw);
}

export function shouldAutoRemediateHelpViaGoose(escalation, env = process.env) {
  if (!envFlag(env.MEMIND_CURSOR_HELP_AUTO_GOOSE_REMEDIATE, true)) return false;
  const pagePath = extractHelpEscalationPagePath(escalation?.userText, escalation?.context ?? {});
  return Boolean(pagePath && escalation?.userId);
}

export function runHelpPageDeliveryRemediationScript({
  escalation,
  env = process.env,
  logger = console,
  viaGoose = true,
} = {}) {
  const userId = escalation?.userId;
  const sessionId = extractHelpEscalationSessionId(escalation);
  const pagePath = extractHelpEscalationPagePath(escalation?.userText, escalation?.context ?? {});
  if (!userId || !pagePath) {
    return Promise.resolve(null);
  }

  const scriptPath = path.join(repoRoot, 'scripts/help-remediate-page-delivery.mjs');
  const args = [
    scriptPath,
    `--user-id=${userId}`,
    `--page=${pagePath}`,
    `--port=${Number(env.H5_PORT ?? 8081)}`,
  ];
  if (sessionId) args.push(`--session-id=${sessionId}`);
  if (viaGoose && sessionId) args.push('--via-goose');

  logger.info?.('[cursor-help] auto goose remediation', {
    userId,
    sessionId,
    pagePath,
    viaGoose: Boolean(viaGoose && sessionId),
  });

  return new Promise((resolve, reject) => {
    const child = spawn(process.execPath, args, {
      cwd: repoRoot,
      stdio: ['ignore', 'pipe', 'pipe'],
      env,
    });
    let stdout = '';
    let stderr = '';
    child.stdout.on('data', (chunk) => {
      stdout += String(chunk);
    });
    child.stderr.on('data', (chunk) => {
      stderr += String(chunk);
    });
    child.on('error', reject);
    child.on('close', (code) => {
      if (code !== 0) {
        reject(new Error(stderr.trim() || stdout.trim() || `remediation exited ${code}`));
        return;
      }
      try {
        const jsonLine = stdout.trim().split('\n').reverse().find((line) => line.startsWith('{'));
        resolve(jsonLine ? JSON.parse(jsonLine) : { stdout });
      } catch {
        resolve({ stdout });
      }
    });
  });
}