// apps/web/src/app/(app)/admin/users/page.tsx
// Admin 유저 목록 — profiles JOIN subscriptions, 검색/필터/페이지네이션

import { Box } from '@mui/material'
import { MetalCard, PhosphorText } from '@d3ro/ui/components/ds'
import { d3roPalette, d3roFontMono, d3roTypo } from '@d3ro/ui/theme'
import { getSupabaseServerClient } from '@/lib/supabase-server'
import Link from 'next/link'

const PAGE_SIZE = 20

interface UserRow {
  id: string
  name: string | null
  email: string | null
  tier: string
  role: string
  created_at: string
  subscription_status: string | null
  payment_provider: string | null
}

async function loadUsers(page: number, search: string, tierFilter: string): Promise<{ users: UserRow[]; total: number }> {
  const supabase = await getSupabaseServerClient()

  // profiles 조회 (DB 타입에 role/조인이 미정의이므로 raw cast)
  const from = page * PAGE_SIZE
  const to = from + PAGE_SIZE - 1

  // 단순 profiles 조회 + 별도 subscriptions 조회
  const profileQuery = supabase
    .from('profiles')
    .select('id, name, tier, created_at', { count: 'exact' })
    .order('created_at', { ascending: false })
    .range(from, to)

  if (search) {
    profileQuery.ilike('name', `%${search}%`)
  }

  if (tierFilter && tierFilter !== 'all') {
    profileQuery.eq('tier', tierFilter as 'free' | 'pro' | 'pro_plus')
  }

  const { data: rawProfiles, count } = await profileQuery
  const profiles = (rawProfiles ?? []) as Array<Record<string, unknown>>

  // 해당 유저들의 구독 정보 조회
  const userIds = profiles.map((p) => p.id as string)
  const { data: rawSubs } = userIds.length > 0
    ? await supabase.from('subscriptions').select('user_id, status, payment_provider').in('user_id', userIds)
    : { data: [] }
  const subs = (rawSubs ?? []) as Array<Record<string, unknown>>
  const subMap = new Map(subs.map((s) => [s.user_id as string, s]))

  // role 조회 (별도 raw query — DB 타입에 role 미정의)
  const { data: rawRoles } = userIds.length > 0
    ? await supabase.from('profiles').select('id, role').in('id', userIds)
    : { data: [] }
  const roles = (rawRoles ?? []) as Array<Record<string, unknown>>
  const roleMap = new Map(roles.map((r) => [r.id as string, (r.role as string) ?? 'user']))

  const users: UserRow[] = profiles.map((row) => {
    const sub = subMap.get(row.id as string)
    return {
      id: row.id as string,
      name: row.name as string | null,
      email: null,
      tier: (row.tier as string) ?? 'free',
      role: roleMap.get(row.id as string) ?? 'user',
      created_at: row.created_at as string,
      subscription_status: (sub?.status as string) ?? null,
      payment_provider: (sub?.payment_provider as string) ?? null,
    }
  })

  return { users, total: count ?? 0 }
}

interface PageProps {
  searchParams: Promise<{ page?: string; search?: string; tier?: string }>
}

export default async function AdminUsersPage({ searchParams }: PageProps): Promise<React.ReactElement> {
  const params = await searchParams
  const page = parseInt(params.page ?? '0', 10)
  const search = params.search ?? ''
  const tierFilter = params.tier ?? 'all'
  const { users, total } = await loadUsers(page, search, tierFilter)
  const totalPages = Math.ceil(total / PAGE_SIZE)

  return (
    <Box>
      {/* Filters */}
      <Box sx={{ display: 'flex', gap: 2, mb: 2, alignItems: 'center' }}>
        <PhosphorText variant="label" sx={{ color: d3roPalette.text.label }}>
          {total} USERS
        </PhosphorText>
        <Box sx={{ flex: 1 }} />
        {['all', 'free', 'pro', 'pro_plus'].map((t) => (
          <Link
            key={t}
            href={`/admin/users?tier=${t}&search=${search}`}
            style={{ textDecoration: 'none' }}
          >
            <PhosphorText
              variant="label"
              sx={{
                px: 1.5, py: 0.5, borderRadius: 1, cursor: 'pointer',
                bgcolor: tierFilter === t ? d3roPalette.bg.inset : 'transparent',
                color: tierFilter === t ? d3roPalette.accent.amber : d3roPalette.text.secondary,
              }}
            >
              {t === 'all' ? 'ALL' : t === 'pro_plus' ? 'PRO+' : t.toUpperCase()}
            </PhosphorText>
          </Link>
        ))}
      </Box>

      {/* Table */}
      <MetalCard sx={{ overflow: 'auto' }}>
        <Box
          component="table"
          sx={{
            width: '100%',
            borderCollapse: 'collapse',
            fontFamily: d3roFontMono,
            fontSize: d3roTypo.small.size,
            '& th, & td': { py: 1, px: 1.5, textAlign: 'left', borderBottom: `1px solid ${d3roPalette.border.subtle}` },
            '& th': { color: d3roPalette.text.label, fontWeight: d3roTypo.label.weight, textTransform: 'uppercase', letterSpacing: d3roTypo.label.spacing },
          }}
        >
          <thead>
            <tr>
              <th>NAME</th>
              <th>TIER</th>
              <th>ROLE</th>
              <th>STATUS</th>
              <th>PROVIDER</th>
              <th>JOINED</th>
            </tr>
          </thead>
          <tbody>
            {users.map((u) => (
              <tr key={u.id}>
                <td>
                  <Link href={`/admin/users/${u.id}`} style={{ color: d3roPalette.accent.amber, textDecoration: 'none' }}>
                    {u.name ?? u.id.substring(0, 8)}
                  </Link>
                </td>
                <td>
                  <TierBadge tier={u.tier} />
                </td>
                <td style={{ color: u.role === 'admin' ? d3roPalette.tag.purple : d3roPalette.text.secondary }}>
                  {u.role.toUpperCase()}
                </td>
                <td style={{ color: u.subscription_status === 'active' ? d3roPalette.tag.green : d3roPalette.text.muted }}>
                  {u.subscription_status?.toUpperCase() ?? '-'}
                </td>
                <td style={{ color: d3roPalette.text.secondary }}>
                  {u.payment_provider ?? '-'}
                </td>
                <td style={{ color: d3roPalette.text.muted }}>
                  {new Date(u.created_at).toLocaleDateString()}
                </td>
              </tr>
            ))}
            {users.length === 0 && (
              <tr>
                <td colSpan={6} style={{ textAlign: 'center', color: d3roPalette.text.muted, padding: '16px 0' }}>
                  No users found
                </td>
              </tr>
            )}
          </tbody>
        </Box>
      </MetalCard>

      {/* Pagination */}
      {totalPages > 1 && (
        <Box sx={{ display: 'flex', justifyContent: 'center', gap: 1, mt: 2 }}>
          {Array.from({ length: Math.min(totalPages, 10) }, (_, i) => (
            <Link
              key={i}
              href={`/admin/users?page=${i}&tier=${tierFilter}&search=${search}`}
              style={{ textDecoration: 'none' }}
            >
              <PhosphorText
                variant="label"
                sx={{
                  px: 1, py: 0.5, borderRadius: 1,
                  bgcolor: page === i ? d3roPalette.accent.amber : d3roPalette.bg.inset,
                  color: page === i ? d3roPalette.bg.app : d3roPalette.text.secondary,
                }}
              >
                {i + 1}
              </PhosphorText>
            </Link>
          ))}
        </Box>
      )}
    </Box>
  )
}

function TierBadge({ tier }: { tier: string }): React.ReactElement {
  const color = tier === 'pro_plus' ? d3roPalette.tag.purple : tier === 'pro' ? d3roPalette.tag.green : d3roPalette.text.secondary
  const label = tier === 'pro_plus' ? 'PRO+' : tier.toUpperCase()
  return <span style={{ color }}>{label}</span>
}