import { randomUUID } from 'node:crypto'
import { readFile } from 'node:fs/promises'
import path from 'node:path'
import { writeFile } from '../atomic-write.js'
import { requireAdminAuth } from '../auth.js'
import { DATA_DIR } from '../config.js'

const CHECKLIST_FILE = path.join(DATA_DIR, 'podcast-checklist.json')

export const CHECKLIST_TASK_IDS = [
  'verify_script', 'read_script', 'record', 'edit', 'mix', 'video_script', 'post_spotify',
  'update_website', 'send_email',
]

const LANES = ['A', 'B']

function sanitizeEpisodes(raw) {
  if (!Array.isArray(raw)) return []
  return raw.slice(0, 500).filter(e => e && typeof e === 'object').map(e => ({
    id: typeof e.id === 'string' && e.id ? e.id.slice(0, 64) : randomUUID(),
    number: Number.isFinite(Number(e.number)) ? Number(e.number) : 0,
    title: typeof e.title === 'string' ? e.title.trim().slice(0, 160) : '',
    datePublished: typeof e.datePublished === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(e.datePublished) ? e.datePublished : '',
    tasks: Object.fromEntries(CHECKLIST_TASK_IDS.map(id => [id, e.tasks?.[id] === true])),
  }))
}

async function load() {
  try {
    const data = JSON.parse(await readFile(CHECKLIST_FILE, 'utf8'))
    return Object.fromEntries(LANES.map(l => [l, sanitizeEpisodes(data[l])]))
  } catch {
    return { A: [], B: [] }
  }
}

export function register(app) {
  app.get('/api/admin/podcast-checklist', requireAdminAuth, async (_req, res) => {
    res.json(await load())
  })

  app.put('/api/admin/podcast-checklist', requireAdminAuth, async (req, res) => {
    const data = Object.fromEntries(LANES.map(l => [l, sanitizeEpisodes(req.body?.[l])]))
    await writeFile(CHECKLIST_FILE, JSON.stringify(data, null, 2), 'utf8')
    res.json({ ok: true })
  })
}