'use client'

import { useEffect, useState } from 'react'
import {
  getUsers,
  createUserByAdmin,
  toggleUserActive,
  deleteUser,
  resetUserPassword,
} from '@/app/actions'
import { Button } from '@/components/ui/button'
import { Card, CardContent, CardHeader } from '@/components/ui/card'
import { Input } from '@/components/ui/input'
import { Loader2, Plus, KeyRound, Ban, Trash2, CheckCircle2, ShieldCheck, User } from 'lucide-react'
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog'
import { Label } from '@/components/ui/label'
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select'

export default function UsersPage() {
  const [users, setUsers] = useState<any[]>([])
  const [total, setTotal] = useState(0)
  const [totalPages, setTotalPages] = useState(1)
  const [page, setPage] = useState(1)
  const [loading, setLoading] = useState(true)

  // Modals
  const [isCreateOpen, setIsCreateOpen] = useState(false)
  const [isPassOpen, setIsPassOpen] = useState(false)
  const [selectedUser, setSelectedUser] = useState<any>(null)

  // Forms
  const [name, setName] = useState('')
  const [username, setUsername] = useState('')
  const [password, setPassword] = useState('')
  const [role, setRole] = useState('user')
  const [newPass, setNewPass] = useState('')

  const [actionLoading, setActionLoading] = useState(false)

  useEffect(() => {
    loadUsers(page)
  }, [page])

  const loadUsers = async (p: number) => {
    setLoading(true)
    const res = await getUsers(p, 10)
    setUsers(res.users)
    setTotal(res.total)
    setTotalPages(res.totalPages)
    setLoading(false)
  }

  const handleCreateUser = async (e: React.FormEvent) => {
    e.preventDefault()
    if (!name || !username || !password) return alert('Lengkapi semua field')

    setActionLoading(true)
    const res = await createUserByAdmin(name, username, password, role)
    if (res.success) {
      setIsCreateOpen(false)
      setName('')
      setUsername('')
      setPassword('')
      setRole('user')
      loadUsers(page)
    } else {
      alert(res.error)
    }
    setActionLoading(false)
  }

  const handleResetPassword = async (e: React.FormEvent) => {
    e.preventDefault()
    if (!newPass || newPass.length < 6) return alert('Password minimal 6 karakter')

    setActionLoading(true)
    const res = await resetUserPassword(selectedUser.id, newPass)
    if (res.success) {
      setIsPassOpen(false)
      setNewPass('')
      alert('Password berhasil diubah')
    } else {
      alert(res.error)
    }
    setActionLoading(false)
  }

  const handleToggleActive = async (id: string, currentStatus: boolean) => {
    if (!confirm(`Yakin ingin ${currentStatus ? 'menonaktifkan' : 'mengaktifkan'} user ini?`))
      return
    const res = await toggleUserActive(id, !currentStatus)
    if (res.success) {
      loadUsers(page)
    } else {
      alert(res.error)
    }
  }

  const handleDelete = async (id: string) => {
    if (!confirm('Yakin ingin menghapus user ini secara permanen?')) return
    const res = await deleteUser(id)
    if (res.success) {
      loadUsers(page)
    } else {
      alert(res.error)
    }
  }

  return (
    <div className="p-6">
      <div className="mb-6 flex flex-col items-start justify-between gap-4 sm:flex-row sm:items-center">
        <div>
          <h2 className="text-xl font-bold text-slate-900 dark:text-white">Manajemen Pengguna</h2>
          <p className="mt-1 text-xs text-slate-500">Kelola data seluruh pengguna TitipIn.</p>
        </div>
        <Button
          onClick={() => setIsCreateOpen(true)}
          className="h-10 rounded-xl bg-[#1B2CC1] px-4 text-xs font-bold text-white shadow-sm hover:bg-[#15229E]"
        >
          <Plus className="mr-1.5 h-4 w-4" /> Tambah User
        </Button>
      </div>

      <div className="overflow-x-auto">
        <table className="w-full text-left text-sm">
          <thead className="border-b border-slate-100 bg-slate-50/50 text-xs font-bold text-slate-500 uppercase dark:border-slate-800 dark:bg-slate-800/50">
            <tr>
              <th className="px-6 py-4">Pengguna</th>
              <th className="px-6 py-4">Role</th>
              <th className="px-6 py-4">Status</th>
              <th className="px-6 py-4">Terdaftar</th>
              <th className="px-6 py-4 text-right">Aksi</th>
            </tr>
          </thead>
          <tbody className="divide-y divide-slate-100 dark:divide-slate-800">
            {loading ? (
              <tr>
                <td colSpan={5} className="px-6 py-12 text-center">
                  <Loader2 className="mx-auto h-6 w-6 animate-spin text-[#1B2CC1]" />
                </td>
              </tr>
            ) : users.length === 0 ? (
              <tr>
                <td colSpan={5} className="px-6 py-12 text-center text-slate-500">
                  Belum ada pengguna lain.
                </td>
              </tr>
            ) : (
              users.map((u) => (
                <tr
                  key={u.id}
                  className="transition-colors hover:bg-slate-50/50 dark:hover:bg-slate-800/20"
                >
                  <td className="px-6 py-4">
                    <div className="flex items-center gap-3">
                      {u.photo ? (
                        <img
                          src={u.photo}
                          alt={u.name}
                          className="h-9 w-9 shrink-0 rounded-full object-cover"
                        />
                      ) : (
                        <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-full bg-blue-100 text-xs font-bold text-blue-700 uppercase">
                          {u.name.charAt(0)}
                        </div>
                      )}
                      <div>
                        <div className="font-bold text-slate-900 dark:text-slate-100">{u.name}</div>
                        <div className="text-xs text-slate-500">@{u.username}</div>
                      </div>
                    </div>
                  </td>
                  <td className="px-6 py-4">
                    {u.role === 'superadmin' ? (
                      <span className="inline-flex items-center gap-1 rounded-md bg-purple-100 px-2 py-1 text-[10px] font-bold text-purple-700 uppercase">
                        <ShieldCheck className="h-3 w-3" /> Superadmin
                      </span>
                    ) : (
                      <span className="inline-flex items-center gap-1 rounded-md bg-slate-100 px-2 py-1 text-[10px] font-bold text-slate-700 uppercase">
                        <User className="h-3 w-3" /> User
                      </span>
                    )}
                  </td>
                  <td className="px-6 py-4">
                    {u.is_active ? (
                      <span className="inline-flex items-center gap-1 rounded-md bg-emerald-100 px-2 py-1 text-[10px] font-bold text-emerald-700 uppercase">
                        <CheckCircle2 className="h-3 w-3" /> Aktif
                      </span>
                    ) : (
                      <span className="inline-flex items-center gap-1 rounded-md bg-red-100 px-2 py-1 text-[10px] font-bold text-red-700 uppercase">
                        <Ban className="h-3 w-3" /> Nonaktif
                      </span>
                    )}
                  </td>
                  <td className="px-6 py-4 text-xs text-slate-500">
                    {new Date(u.created_at).toLocaleDateString('id-ID')}
                  </td>
                  <td className="px-6 py-4 text-right">
                    <div className="flex justify-end gap-2">
                      <Button
                        size="sm"
                        variant="ghost"
                        onClick={() => {
                          setSelectedUser(u)
                          setIsPassOpen(true)
                        }}
                        className="h-8 rounded-lg bg-slate-100 px-2 font-medium text-slate-700 hover:bg-slate-200 hover:text-slate-900"
                        title="Ubah Password"
                      >
                        <KeyRound className="h-4 w-4" />
                      </Button>

                      {u.role !== 'superadmin' && (
                        <>
                          <Button
                            size="sm"
                            variant="ghost"
                            onClick={() => handleToggleActive(u.id, u.is_active)}
                            className={`h-8 rounded-lg px-2 font-medium ${u.is_active ? 'bg-amber-100 text-amber-700 hover:bg-amber-200 hover:text-amber-900' : 'bg-emerald-100 text-emerald-700 hover:bg-emerald-200 hover:text-emerald-900'}`}
                            title={u.is_active ? 'Nonaktifkan' : 'Aktifkan'}
                          >
                            {u.is_active ? (
                              <Ban className="h-4 w-4" />
                            ) : (
                              <CheckCircle2 className="h-4 w-4" />
                            )}
                          </Button>
                          <Button
                            size="sm"
                            variant="ghost"
                            onClick={() => handleDelete(u.id)}
                            className="h-8 rounded-lg bg-rose-100 px-2 font-medium text-rose-700 hover:bg-rose-200 hover:text-rose-900"
                            title="Hapus"
                          >
                            <Trash2 className="h-4 w-4" />
                          </Button>
                        </>
                      )}
                    </div>
                  </td>
                </tr>
              ))
            )}
          </tbody>
        </table>
      </div>

      {totalPages > 1 && (
        <div className="flex items-center justify-between border-t border-slate-100 bg-slate-50/50 p-4 dark:border-slate-800">
          <span className="text-xs text-slate-500">
            Halaman {page} dari {totalPages}
          </span>
          <div className="flex gap-2">
            <Button
              disabled={page === 1}
              onClick={() => setPage((p) => p - 1)}
              variant="outline"
              size="sm"
              className="h-8 rounded-lg text-xs"
            >
              Sebelumnya
            </Button>
            <Button
              disabled={page === totalPages}
              onClick={() => setPage((p) => p + 1)}
              variant="outline"
              size="sm"
              className="h-8 rounded-lg text-xs"
            >
              Selanjutnya
            </Button>
          </div>
        </div>
      )}

      {/* CREATE MODAL */}
      <Dialog open={isCreateOpen} onOpenChange={setIsCreateOpen}>
        <DialogContent className="overflow-hidden rounded-3xl border-0 p-0 sm:max-w-md">
          <div className="border-b border-slate-100 px-6 pt-6 pb-4">
            <DialogTitle className="text-xl font-black">Tambah User Baru</DialogTitle>
          </div>
          <form onSubmit={handleCreateUser} className="space-y-4 px-6 py-4">
            <div className="space-y-1.5">
              <Label className="text-xs font-bold text-slate-700 uppercase">Nama Lengkap</Label>
              <Input
                required
                value={name}
                onChange={(e) => setName(e.target.value)}
                className="h-11 rounded-xl"
                placeholder="Masukkan nama lengkap"
              />
            </div>
            <div className="space-y-1.5">
              <Label className="text-xs font-bold text-slate-700 uppercase">Username</Label>
              <Input
                required
                value={username}
                onChange={(e) => setUsername(e.target.value)}
                className="h-11 rounded-xl"
                placeholder="Masukkan username unik"
              />
            </div>
            <div className="space-y-1.5">
              <Label className="text-xs font-bold text-slate-700 uppercase">Password</Label>
              <Input
                required
                type="password"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                className="h-11 rounded-xl"
                placeholder="Buat kata sandi (min. 6 karakter)"
              />
            </div>
            <div className="space-y-2">
              <Label className="text-xs font-bold text-slate-700 uppercase">Role Akses</Label>
              <div className="grid grid-cols-2 gap-3">
                <button
                  type="button"
                  onClick={() => setRole('user')}
                  className={`flex h-11 items-center justify-center gap-2 rounded-xl border text-sm font-bold transition-all ${
                    role === 'user'
                      ? 'border-[#1B2CC1] bg-[#1B2CC1]/5 text-[#1B2CC1] ring-1 ring-[#1B2CC1]/20'
                      : 'border-slate-200 text-slate-500 hover:bg-slate-50'
                  }`}
                >
                  <User className="h-4 w-4" /> User Biasa
                </button>
                <button
                  type="button"
                  onClick={() => setRole('superadmin')}
                  className={`flex h-11 items-center justify-center gap-2 rounded-xl border text-sm font-bold transition-all ${
                    role === 'superadmin'
                      ? 'border-purple-500 bg-purple-50 text-purple-700 ring-1 ring-purple-500/20'
                      : 'border-slate-200 text-slate-500 hover:bg-slate-50'
                  }`}
                >
                  <ShieldCheck className="h-4 w-4" /> Superadmin
                </button>
              </div>
            </div>
            <div className="flex gap-3 pt-4">
              <Button
                type="button"
                variant="outline"
                onClick={() => setIsCreateOpen(false)}
                className="h-11 flex-1 rounded-xl"
              >
                Batal
              </Button>
              <Button
                type="submit"
                disabled={actionLoading}
                className="h-11 flex-1 rounded-xl bg-[#1B2CC1] text-white hover:bg-[#15229E]"
              >
                {actionLoading ? <Loader2 className="h-5 w-5 animate-spin" /> : 'Simpan User'}
              </Button>
            </div>
          </form>
        </DialogContent>
      </Dialog>

      {/* RESET PASSWORD MODAL */}
      <Dialog open={isPassOpen} onOpenChange={setIsPassOpen}>
        <DialogContent className="overflow-hidden rounded-3xl border-0 p-0 sm:max-w-md">
          <div className="border-b border-slate-100 px-6 pt-6 pb-4">
            <DialogTitle className="text-xl font-black">Ubah Password</DialogTitle>
            <p className="mt-1 text-xs text-slate-500">
              Ubah password untuk user{' '}
              <span className="font-bold text-slate-900">@{selectedUser?.username}</span>
            </p>
          </div>
          <form onSubmit={handleResetPassword} className="space-y-4 px-6 py-4">
            <div className="space-y-1.5">
              <Label className="text-xs font-bold text-slate-700 uppercase">Password Baru</Label>
              <Input
                required
                type="password"
                value={newPass}
                onChange={(e) => setNewPass(e.target.value)}
                className="h-11 rounded-xl"
                placeholder="Minimal 6 karakter"
              />
            </div>
            <div className="flex gap-3 pt-4">
              <Button
                type="button"
                variant="outline"
                onClick={() => setIsPassOpen(false)}
                className="h-11 flex-1 rounded-xl"
              >
                Batal
              </Button>
              <Button
                type="submit"
                disabled={actionLoading}
                className="h-11 flex-1 rounded-xl bg-slate-900 text-white hover:bg-slate-800"
              >
                {actionLoading ? <Loader2 className="h-5 w-5 animate-spin" /> : 'Simpan Password'}
              </Button>
            </div>
          </form>
        </DialogContent>
      </Dialog>
    </div>
  )
}