import type { AccessArgs, CollectionConfig } from 'payload'

const isAdmin = (args: AccessArgs) =>
  (args.req.user as { role?: string } | null | undefined)?.role === 'admin'

export const ROLES = ['free', 'vip', 'admin'] as const

const Users: CollectionConfig = {
  slug: 'users',
  auth: { maxLoginAttempts: 5, lockTime: 15 * 60 * 1000 },
  admin: {
    useAsTitle: 'email',
    defaultColumns: ['email', 'role', 'createdAt'],
  },
  access: {
    admin: isAdmin,
    // Only self and admins can read full user docs
    read: ({ req, id }) =>
      req.user?.role === 'admin' || (id != null && req.user?.id === id),
    // Public open for self-signup; beforeChange forces role 'free' for non-admins
    create: () => true,
    update: ({ req, id }) =>
      req.user?.role === 'admin' || req.user?.id === id,
    delete: isAdmin,
  },
  hooks: {
    // Admin accounts never lock out (owner decision 2026-10-09): clear any lock
    // before the login flow reads it. db.updateOne bypasses hooks on purpose —
    // incrementLoginAttempts writes the same way, so this cannot be intercepted
    // in beforeChange.
    beforeOperation: [
      async ({ args, operation, req }) => {
        if (operation !== 'login') return
        const email =
          typeof args?.data?.email === 'string' ? args.data.email.toLowerCase().trim() : null
        if (!email) return
        const { docs } = await req.payload.find({
          collection: 'users',
          where: { email: { equals: email } },
          limit: 1,
          depth: 0,
          overrideAccess: true,
        })
        const user = docs[0] as { id: number; role?: string } | undefined
        if (user?.role !== 'admin') return
        await req.payload.db.updateOne({
          collection: 'users',
          id: user.id,
          data: { lockUntil: null, loginAttempts: 0 },
        })
      },
    ],
    // Signup must never mint VIP/admin accounts or set Stripe IDs. Local-API
    // activation (payment success) passes context.systemActivation to bypass.
    beforeChange: [
      ({ data, req, operation, context, originalDoc }) => {
        const trusted = req.user?.role === 'admin' || context?.systemActivation === true
        if (!trusted) {
          delete data.stripeCustomerId
          delete data.verificationToken
          delete data.emailVerified
          // `onboarded` is intentionally self-writable: the member wizard
          // PATCHes { level, onboarded: true } on its own account. Signup
          // still cannot pre-set it — the create branch below forces false.
          if (operation === 'create') {
            data.role = 'free'
            data.emailVerified = false
            data.onboarded = false
            if (data.termsVersion) data.termsAcceptedAt = new Date().toISOString()
          } else if ('role' in data) {
            // keep current role — non-admins can never change it, but the
            // field must stay present or required-validation fails
            data.role = originalDoc.role
          }
        }
        return data
      },
    ],
  },
  fields: [
    {
      name: 'fullName',
      type: 'text',
      label: 'Full Name',
    },
    { name: 'termsVersion', type: 'text', label: 'Terms version', admin: { hidden: true } },
    { name: 'termsAcceptedAt', type: 'date', label: 'Terms accepted at', admin: { hidden: true } },
    {
      name: 'interest',
      type: 'select',
      label: 'Interest (from member onboarding)',
      options: [
        { label: 'الوكلاء وتنسيقهم', value: 'الوكلاء' },
        { label: 'الاسترجاع وRAG', value: 'RAG' },
        { label: 'الأتمتة للأعمال', value: 'الأتمتة' },
        { label: 'النماذج المفتوحة', value: 'النماذج المفتوحة' },
      ],
    },
    {
      name: 'level',
      type: 'select',
      label: 'Experience level',
      options: [
        { label: 'مبتدئ', value: 'مبتدئ' },
        { label: 'متوسط', value: 'متوسط' },
        { label: 'متقدم', value: 'متقدم' },
      ],
    },
    {
      name: 'goal',
      type: 'select',
      label: 'Goal (from VIP onboarding)',
      options: [
        { label: 'بناء مشروع ذكاء اصطناعي', value: 'بناء مشروع ذكاء اصطناعي' },
        { label: 'تطوير مساري المهني', value: 'تطوير مساري المهني' },
        { label: 'أتمتة العمل', value: 'أتمتة العمل' },
        { label: 'فهم الوكلاء بعمق', value: 'فهم الوكلاء بعمق' },
      ],
    },
    {
      name: 'prefs',
      type: 'json',
      label: 'Notification prefs',
      admin: { description: 'weekly/trackUpdates/replies switches (VIP onboarding)' },
    },
    { name: 'emailVerified', type: 'checkbox', defaultValue: false, label: 'Email verified' },
    {
      name: 'verificationToken',
      type: 'text',
      hidden: true,
      admin: { readOnly: true, description: 'Email verification token (hashed at rest not required for this flow)' },
    },
    { name: 'onboarded', type: 'checkbox', defaultValue: false, label: 'Onboarding completed' },
    {
      name: 'role',
      type: 'select',
      required: true,
      defaultValue: 'free',
      options: [
        { label: 'Free', value: 'free' },
        { label: 'VIP', value: 'vip' },
        { label: 'Admin', value: 'admin' },
      ],
    },
    {
      name: 'stripeCustomerId',
      type: 'text',
      label: 'Stripe Customer ID',
      admin: { readOnly: true, position: 'sidebar' },
    },
  ],
}

export default Users