const express = require('express')
const path = require('path')
const fs = require('fs')
const multer = require('multer')
const { body, param } = require('express-validator')

const ctrl = require('./admin.controller')
const { isLoggedIn } = require('../../../utils/auth')
const noindex = require('../../../middleware/noindex')
const validate = require('../../../middleware/validate')

const adminRouter = express.Router()

// Every admin route requires auth and is kept out of search indexes.
adminRouter.use(noindex, isLoggedIn)

// ── Image uploads (screenshots/gallery) ───────────────────────────────
const UPLOAD_DIR =
  process.env.UPLOAD_DIR || path.join(__dirname, '..', '..', '..', '..', 'uploads')
fs.mkdirSync(UPLOAD_DIR, { recursive: true })

const storage = multer.diskStorage({
  destination: (req, file, cb) => cb(null, UPLOAD_DIR),
  filename: (req, file, cb) => {
    const ext = path.extname(file.originalname).toLowerCase()
    cb(null, `${Date.now()}-${Math.round(Math.random() * 1e9)}${ext}`)
  },
})
const upload = multer({
  storage,
  limits: { fileSize: 8 * 1024 * 1024 },
  fileFilter: (req, file, cb) => {
    if (/^image\/(png|jpe?g|gif|webp|avif)$/.test(file.mimetype)) cb(null, true)
    else cb(new Error('Only image uploads are allowed'))
  },
})

// ── Dashboard & site mode ─────────────────────────────────────────────
adminRouter.get('/dashboard', ctrl.dashboard)
adminRouter.put(
  '/site-mode',
  body('mode').isIn(['live', 'maintenance']),
  validate,
  ctrl.setSiteMode,
)

// ── Posts (news / five-on-friday / newsletter / screenshots) ──────────
adminRouter.get('/posts', ctrl.listPosts)
adminRouter.post(
  '/posts',
  body('category').isString().notEmpty(),
  body('title').isString().trim().notEmpty().isLength({ max: 200 }),
  validate,
  ctrl.createPost,
)
adminRouter.post('/posts/upload', upload.single('image'), ctrl.uploadImage)
// Generalized upload (rich-text editors). Same multer middleware; returns { url }.
adminRouter.post('/uploads', upload.single('image'), ctrl.uploadFile)
adminRouter.get('/posts/:id', param('id').isInt(), validate, ctrl.getPost)
adminRouter.put('/posts/:id', param('id').isInt(), validate, ctrl.updatePost)
adminRouter.patch(
  '/posts/:id/publish',
  param('id').isInt(),
  body('published').isBoolean(),
  validate,
  ctrl.publishPost,
)
adminRouter.delete('/posts/:id', param('id').isInt(), validate, ctrl.deletePost)

// ── Wiki categories (static paths registered before /wiki/:slug) ───────
adminRouter.get('/wiki/categories', ctrl.listWikiCategories)
adminRouter.post(
  '/wiki/categories',
  body('slug').matches(/^[a-z0-9-]+$/),
  body('title').isString().trim().notEmpty().isLength({ max: 200 }),
  body('description').optional({ values: 'falsy' }).isString().isLength({ max: 400 }),
  body('sort_order').optional().isInt(),
  validate,
  ctrl.createWikiCategory,
)
adminRouter.put(
  '/wiki/categories/:id',
  param('id').isInt(),
  body('slug').optional().matches(/^[a-z0-9-]+$/),
  body('title').optional().isString().trim().notEmpty().isLength({ max: 200 }),
  body('description').optional({ values: 'falsy' }).isString().isLength({ max: 400 }),
  body('sort_order').optional().isInt(),
  validate,
  ctrl.updateWikiCategory,
)
adminRouter.delete('/wiki/categories/:id', param('id').isInt(), validate, ctrl.deleteWikiCategory)

// ── Wiki tags ──────────────────────────────────────────────────────────
adminRouter.get('/wiki/tags', ctrl.listWikiTags)

// ── Wiki pages ─────────────────────────────────────────────────────────
adminRouter.get('/wiki', ctrl.listWiki)
adminRouter.post(
  '/wiki',
  body('slug').matches(/^[a-z0-9-]+$/),
  body('title').isString().trim().notEmpty().isLength({ max: 200 }),
  body('excerpt').optional({ values: 'falsy' }).isString().isLength({ max: 400 }),
  body('category_id').optional({ values: 'null' }).isInt(),
  body('published').optional().isBoolean(),
  body('tags').optional().isArray(),
  validate,
  ctrl.createWiki,
)
adminRouter.get('/wiki/:slug', ctrl.getWiki)
adminRouter.put(
  '/wiki/:slug',
  body('title').optional().isString().trim().notEmpty().isLength({ max: 200 }),
  body('excerpt').optional({ values: 'falsy' }).isString().isLength({ max: 400 }),
  body('category_id').optional({ values: 'null' }).isInt(),
  body('published').optional().isBoolean(),
  body('tags').optional().isArray(),
  body('change_note').optional({ values: 'falsy' }).isString().isLength({ max: 280 }),
  validate,
  ctrl.updateWiki,
)
adminRouter.patch(
  '/wiki/:slug/publish',
  body('published').isBoolean(),
  validate,
  ctrl.publishWiki,
)
adminRouter.get('/wiki/:slug/revisions', ctrl.listWikiRevisions)
adminRouter.get('/wiki/:slug/revisions/:id', param('id').isInt(), validate, ctrl.getWikiRevision)
adminRouter.post(
  '/wiki/:slug/revisions/:id/restore',
  param('id').isInt(),
  validate,
  ctrl.restoreWikiRevision,
)
adminRouter.delete('/wiki/:slug', ctrl.deleteWiki)

// ── Settings ──────────────────────────────────────────────────────────
adminRouter.get('/settings', ctrl.getSettings)
adminRouter.put('/settings', ctrl.updateSettings)

// ── Activity log ──────────────────────────────────────────────────────
adminRouter.get('/activity', ctrl.listActivity)

// ── User management ───────────────────────────────────────────────────
adminRouter.get('/users', ctrl.listUsers)
adminRouter.post(
  '/users',
  body('username').isString().trim().isLength({ min: 3, max: 32 }),
  body('password').isString().isLength({ min: 8, max: 64 }),
  body('role').optional().isIn(['admin', 'editor']),
  validate,
  ctrl.createUser,
)
adminRouter.put(
  '/users/:id',
  param('id').isInt(),
  body('password').optional().isString().isLength({ min: 8, max: 64 }),
  body('role').optional().isIn(['admin', 'editor']),
  validate,
  ctrl.updateUser,
)
adminRouter.delete('/users/:id', param('id').isInt(), validate, ctrl.deleteUser)

module.exports = adminRouter