const fs = require('node:fs')
const path = require('node:path')

function loadEnvFile() {
  const envPath = path.join(__dirname, '.env')
  if (!fs.existsSync(envPath)) return

  const lines = fs.readFileSync(envPath, 'utf8').split(/\r?\n/)
  for (const line of lines) {
    const trimmed = line.trim()
    if (!trimmed || trimmed.startsWith('#')) continue

    const separatorIndex = trimmed.indexOf('=')
    if (separatorIndex === -1) continue

    const key = trimmed.slice(0, separatorIndex).trim()
    let value = trimmed.slice(separatorIndex + 1).trim()
    if (
      (value.startsWith('"') && value.endsWith('"')) ||
      (value.startsWith("'") && value.endsWith("'"))
    ) {
      value = value.slice(1, -1)
    }

    if (key && (!process.env[key] || process.env[key] === '')) {
      process.env[key] = value
    }
  }
}

loadEnvFile()

// Crash-loop governor: after max_restarts attempts that each fail to stay up
// min_uptime ms, PM2 marks the app `errored` and stops relaunching it, instead
// of restarting forever and pegging the CPU.
const RESTART_POLICY = {
  max_restarts: 10,
  min_uptime: 10000,
  exp_backoff_restart_delay: 200,
}

module.exports = {
  apps: [
    {
      name: 'tssbot-web',
      ...RESTART_POLICY,
      script: 'server.cjs',
      cwd: __dirname,
      exec_mode: 'cluster',
      instances: process.env.WEB_INSTANCES || 2,
      wait_ready: true,
      listen_timeout: 10000,
      kill_timeout: 10000,
      env: {
        NODE_ENV: 'production',
        PORT: process.env.PORT || 3010,
        API_UPSTREAM: process.env.API_UPSTREAM || 'http://127.0.0.1:6000',
        PUBLIC_ORIGIN: process.env.PUBLIC_ORIGIN || '',
        UPTIME_STORAGE_DIR: process.env.UPTIME_STORAGE_DIR || '~/tsswebstorage',
        UPTIME_DATABASE_FILE: process.env.UPTIME_DATABASE_FILE || 'uptime.sqlite',
        UPTIME_SAMPLE_INTERVAL_MS: process.env.UPTIME_SAMPLE_INTERVAL_MS || 1800000,
        UPTIME_HISTORY_LIMIT: process.env.UPTIME_HISTORY_LIMIT || 336,
        API_CACHE_TTL_MS: process.env.API_CACHE_TTL_MS || 15000,
        API_RATE_LIMIT_WINDOW_MS: process.env.API_RATE_LIMIT_WINDOW_MS || 60000,
        API_RATE_LIMIT_MAX: process.env.API_RATE_LIMIT_MAX || 120,
        TRUST_PROXY: process.env.TRUST_PROXY || 'cloudflare',
        TRUSTED_UPSTREAM_IPS: process.env.TRUSTED_UPSTREAM_IPS || '127.0.0.1,::1,::ffff:127.0.0.1',
        SITE_SESSION_SECRET: process.env.SITE_SESSION_SECRET || process.env.API_SESSION_SECRET || process.env.TURNSTILE_SECRET_KEY || '',
        SITE_SESSION_TTL_SECONDS: process.env.SITE_SESSION_TTL_SECONDS || 43200,
        TURNSTILE_SECRET_KEY: process.env.TURNSTILE_SECRET_KEY || '',
      },
    },
    {
      name: 'tssbot-webhook',
      ...RESTART_POLICY,
      script: 'webhook.cjs',
      cwd: __dirname,
      autorestart: true,
      env: {
        NODE_ENV: 'production',
        WEBHOOK_PORT: process.env.WEBHOOK_PORT || 3011,
        WEBHOOK_PM2_NAME: process.env.WEBHOOK_PM2_NAME || 'tssbot-webhook',
        GITHUB_WEBHOOK_SECRET: process.env.GITHUB_WEBHOOK_SECRET || '',
        GITHUB_WEBHOOK_REFS: process.env.GITHUB_WEBHOOK_REFS || 'refs/heads/main',
        GITHUB_WEBHOOK_REPOSITORY: process.env.GITHUB_WEBHOOK_REPOSITORY || '',
        PM2_RESTART_TARGETS: process.env.PM2_RESTART_TARGETS || 'tssbot-web,tssbot-backend',
        DISCORD_WEBHOOK_URL: process.env.DISCORD_WEBHOOK_URL || '',
        DISCORD_INCLUDE_PATCH: process.env.DISCORD_INCLUDE_PATCH || 'false',
      },
    },
    {
      name: 'tssbot-backend',
      ...RESTART_POLICY,
      script: process.platform === 'win32'
        ? 'backend/target/release/tssbot-backend.exe'
        : 'backend/target/release/tssbot-backend',
      cwd: __dirname,
      autorestart: true,
      env: {
        NODE_ENV: 'production',
        BACKEND_PORT: process.env.BACKEND_PORT || 6000,
        BACKEND_HOST: process.env.BACKEND_HOST || '127.0.0.1',
        BACKEND_ALLOWED_ORIGINS: process.env.BACKEND_ALLOWED_ORIGINS || process.env.PUBLIC_ORIGIN || '',
        TSS_BATTLES_DB: process.env.TSS_BATTLES_DB || 'tss_battles.db',
        TSS_TEAMS_DB: process.env.TSS_TEAMS_DB || 'tss_teams.db',
        // Vehicle name + icon caches (built by the bots in the shared STORAGE volume).
        VEHICLE_TRANSLATIONS_JSON: process.env.VEHICLE_TRANSLATIONS_JSON
          || '/mnt/HC_Volume_105581488/STORAGE/CACHE/vehicle_translations.json',
        VEHICLE_DATA_CACHE_JSON: process.env.VEHICLE_DATA_CACHE_JSON
          || '/mnt/HC_Volume_105581488/STORAGE/CACHE/vehicle_data_cache.json',
      },
    },
  ],
}