<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use Carbon\Carbon;
use Carbon\CarbonPeriod;

class SuperAdminController extends Controller
{
    private function apiUrl($endpoint = '')
    {
        return rtrim(env('BACKEND_API_URL'), '/') . '/' . ltrim($endpoint, '/');
    }

    public function index()
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/penugasan'), ['is_archived' => 'false']);
            
        $dashResponse = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/dashboard'));

        $items = collect([]);
        if ($response->successful()) {
            $items = collect($response->json()['data'])->map(function($item) {
                return (object) [
                    'id' => $item['id'],
                    'nama_kegiatan' => $item['kegiatan'],
                    'tanggal' => $item['tanggal_mulai'],
                    'tanggal_selesai' => $item['tanggal_selesai'] ?? null,
                    'created_at' => \Carbon\Carbon::parse($item['created_at']),
                    'status' => $item['status'] == 'proses' ? 'on_progres' : $item['status'],
                    'user' => (object) ['name' => $item['pembuat']['name'] ?? 'System'],
                    'petugas' => $item['petugas'] ?? [],
                    'pembuat' => $item['pembuat'] ?? []
                ];
            });
        }
        
        $allItems = clone $items;
        $items = $items->filter(function($item) {
            return $item->status !== 'dibatalkan';
        })->values();

        // Manual Pagination
        $perPage = 10;
        $currentPage = \Illuminate\Pagination\Paginator::resolveCurrentPage();
        $currentItems = $items->slice(($currentPage - 1) * $perPage, $perPage)->all();
        $activities = new \Illuminate\Pagination\LengthAwarePaginator($currentItems, count($items), $perPage, $currentPage, [
            'path' => \Illuminate\Pagination\Paginator::resolveCurrentPath()
        ]);

        $stats = [
            'total'   => $items->count(),
            'users'   => 0, // diisi nanti
            'proses'  => $items->where('status', 'on_progres')->count(),
            'deleted' => $allItems->where('status', 'dibatalkan')->count(),
        ];

        // Ambil User
        $usersResponse = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/users'));
        $users = collect([]);
        if ($usersResponse->successful()) {
            $users = collect($usersResponse->json()['data']);
            $stats['users'] = $users->count();
        }

        // ── Top 5 Petugas (Dihitung dari penugasan)
        $topUsers = $users->map(function($u) use ($items) {
            $count = $items->filter(function($item) use ($u) {
                if (isset($item->petugas) && is_array($item->petugas)) {
                    foreach ($item->petugas as $p) {
                        if (isset($p['id']) && $p['id'] == $u['id']) return true;
                    }
                }
                return isset($item->pembuat['id']) && $item->pembuat['id'] == $u['id'];
            })->count();

            return (object) [
                'name' => $u['name'] ?? 'System',
                'activities_count' => $count
            ];
        })->sortByDesc('activities_count')->take(5)->values();

        // ── Data Grafik
        $chartData = $this->buildChartData($items);

        $system = [
            'server'   => rand(25, 55),
            'database' => rand(45, 75),
            'storage'  => rand(60, 85),
        ];

        return view('superadmin.dashboard', compact(
            'activities',
            'stats',
            'topUsers',
            'chartData',
            'system'
        ));
    }

    private function buildChartData($items)
    {
        $now = Carbon::now();

        // ── MINGGU INI ─────────────────────────────────
        $startOfWeek = $now->copy()->startOfWeek(Carbon::MONDAY);
        $endOfWeek   = $now->copy()->endOfWeek(Carbon::SUNDAY);

        $weekLabels = ['Sen', 'Sel', 'Rab', 'Kam', 'Jum', 'Sab', 'Min'];
        $weekValues = array_fill(0, 7, 0);

        foreach ($items as $item) {
            $date = $item->created_at;
            if ($date->between($startOfWeek, $endOfWeek)) {
                $idx = $date->dayOfWeekIso - 1;
                $weekValues[$idx]++;
            }
        }

        // ── BULAN INI ──────────────────────────────
        $startOfMonth = $now->copy()->startOfMonth();
        $endOfMonth   = $now->copy()->endOfMonth();
        $daysInMonth  = $now->daysInMonth;

        $monthLabels = [];
        $monthValues = array_fill(0, $daysInMonth, 0);

        for ($i = 1; $i <= $daysInMonth; $i++) {
            $monthLabels[] = ($i % 5 === 1 || $i === 1) ? (string) $i : '';
        }

        foreach ($items as $item) {
            $date = $item->created_at;
            if ($date->between($startOfMonth, $endOfMonth)) {
                $monthValues[$date->day - 1]++;
            }
        }

        // ── TAHUN INI ────────────────────────────────
        $monthNames = ['Jan', 'Feb', 'Mar', 'Apr', 'Mei', 'Jun', 'Jul', 'Ags', 'Sep', 'Okt', 'Nov', 'Des'];
        $yearValues = array_fill(0, 12, 0);

        foreach ($items as $item) {
            $date = $item->created_at;
            if ($date->year === $now->year) {
                $yearValues[$date->month - 1]++;
            }
        }

        return [
            'week' => [
                'labels'     => $weekLabels,
                'values'     => $weekValues,
                'todayIndex' => $now->dayOfWeekIso - 1,
            ],
            'month' => [
                'labels'     => $monthLabels,
                'values'     => $monthValues,
                'todayIndex' => $now->day - 1,
            ],
            'year' => [
                'labels'     => $monthNames,
                'values'     => $yearValues,
                'todayIndex' => $now->month - 1,
            ],
        ];
    }

    public function show($id)
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/penugasan/' . $id));

        if (!$response->successful()) {
            return redirect()->back()->with('error', 'Kegiatan tidak ditemukan.');
        }
        $data = $response->json()['data'];
        $activity = (object) [
            'id' => $data['id'],
            'nama_kegiatan' => $data['kegiatan'],
            'tanggal' => $data['tanggal_mulai'],
            'tanggal_selesai' => $data['tanggal_selesai'] ?? null,
            'status' => $data['status'] == 'proses' ? 'on_progres' : $data['status'],
            'deskripsi' => $data['keterangan'] ?? '-',
            'lokasi' => $data['lokasi'] ?? '-',
            'status_note' => $data['status_note'] ?? null,
            'updated_at' => \Carbon\Carbon::parse($data['updated_at'] ?? now()),
            'user' => (object) ['name' => $data['pembuat']['name'] ?? 'System'],
            'petugas' => $data['petugas'] ?? [],
            'nomor_surat' => $data['nomor_surat'] ?? '-',
            'progress' => $data['progress'] ?? []
        ];

        return view('superadmin.kegiatan.show', compact('activity'));
    }

    public function approve(Request $request, $id)
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->post($this->apiUrl("/penugasan/{$id}/update-status"), [
                'status' => 'telah_ditinjau'
            ]);

        if ($response->successful()) {
            return redirect()->back()->with('success', 'Kegiatan berhasil disetujui (Telah Ditinjau).');
        }

        return redirect()->back()->with('error', 'Terjadi kesalahan saat menyetujui kegiatan.');
    }

    public function revision(Request $request, $id)
    {
        $request->validate([
            'status_note' => 'required|string|min:5|max:255'
        ]);

        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->post($this->apiUrl("/penugasan/{$id}/update-status"), [
                'status' => 'proses',
                'status_note' => 'REVISI dari ' . session('user_name') . ': ' . $request->status_note
            ]);

        if ($response->successful()) {
            return redirect()->back()->with('success', 'Kegiatan dikembalikan ke pegawai untuk direvisi.');
        }

        return redirect()->back()->with('error', 'Terjadi kesalahan saat meminta revisi.');
    }

    public function destroy(Request $request, $id)
    {
        $request->validate([
            'alasan_hapus' => 'required|string|min:10|max:500',
        ]);

        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->post($this->apiUrl("/penugasan/{$id}/delete"), [
                'alasan' => $request->alasan_hapus
            ]);

        if ($response->successful()) {
            return redirect()->back()->with('success', 'Kegiatan berhasil dibatalkan dan dicatat dalam log.');
        }

        return redirect()->back()->with('error', 'Gagal membatalkan kegiatan.');
    }

    public function arsip()
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/penugasan'), ['is_archived' => 'true']);

        $items = collect([]);
        if ($response->successful()) {
            $items = collect($response->json()['data'])->map(function($item) {
                return (object) [
                    'id' => $item['id'],
                    'nama_kegiatan' => $item['kegiatan'],
                    'tanggal' => $item['tanggal_mulai'],
                    'tanggal_selesai' => $item['tanggal_selesai'] ?? null,
                    'created_at' => \Carbon\Carbon::parse($item['created_at']),
                    'status' => $item['status'] == 'proses' ? 'on_progres' : $item['status'],
                    'user' => (object) ['name' => $item['pembuat']['name'] ?? 'System'],
                    'petugas' => $item['petugas'] ?? [],
                    'pembuat' => $item['pembuat'] ?? []
                ];
            });
        }

        // Manual Pagination
        $perPage = 10;
        $currentPage = \Illuminate\Pagination\Paginator::resolveCurrentPage();
        $currentItems = $items->slice(($currentPage - 1) * $perPage, $perPage)->all();
        $activities = new \Illuminate\Pagination\LengthAwarePaginator($currentItems, count($items), $perPage, $currentPage, [
            'path' => \Illuminate\Pagination\Paginator::resolveCurrentPath()
        ]);

        return view('superadmin.arsip.index', compact('activities'));
    }

    public function archive($id)
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->post($this->apiUrl("/penugasan/{$id}/archive"));

        if ($response->successful()) {
            return redirect()->back()->with('success', 'Status arsip laporan berhasil diperbarui.');
        }

        return redirect()->back()->with('error', 'Gagal memperbarui status arsip laporan.');
    }

    public function userIndex()
    {
        // Panggil API Penugasan untuk menghitung activities dinamis
        $penugasanResponse = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/penugasan'));
        $items = collect([]);
        if ($penugasanResponse->successful()) {
            $items = collect($penugasanResponse->json()['data']);
        }

        // Panggil API Users
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/users'));

        $users = collect([]);
        if ($response->successful()) {
            $users = collect($response->json()['data'])->map(function($u) use ($items) {
                $activitiesCount = $items->filter(function($item) use ($u) {
                    // Cek apakah user ada di array petugas
                    if (isset($item['petugas']) && is_array($item['petugas'])) {
                        foreach ($item['petugas'] as $p) {
                            if ($p['id'] == $u['id']) return true;
                        }
                    }
                    // Fallback cek pembuat
                    return ($item['pembuat']['id'] ?? null) == $u['id'];
                })->count();

                return (object) [
                    'id' => $u['id'],
                    'name' => $u['name'],
                    'username' => $u['username'],
                    'role' => $u['role'],
                    'created_at' => isset($u['created_at']) ? \Carbon\Carbon::parse($u['created_at']) : now(),
                    'activities_count' => $activitiesCount
                ];
            });
        }

        // Manual Pagination
        $perPage = 15;
        $currentPage = \Illuminate\Pagination\Paginator::resolveCurrentPage();
        $currentItems = $users->slice(($currentPage - 1) * $perPage, $perPage)->all();
        $paginatedUsers = new \Illuminate\Pagination\LengthAwarePaginator($currentItems, $users->count(), $perPage, $currentPage, [
            'path' => \Illuminate\Pagination\Paginator::resolveCurrentPath()
        ]);

        $stats = [
            'total' => $users->count(),
            'active' => $users->where('activities_count', '>', 0)->count(),
            'activities' => $users->sum('activities_count'),
            'max_activities' => max($users->max('activities_count') ?? 1, 1),
        ];

        return view('superadmin.user.index', ['users' => $paginatedUsers, 'stats' => $stats]);
    }

    public function createUser()
    {
        return view('superadmin.user.create-user');
    }

    public function storeUser(Request $request)
    {
        $request->validate([
            'name'     => 'required|string',
            'username' => 'required|string',
            'password' => 'required|string|min:6',
            'role'     => 'required|in:user,admin,superadmin',
        ]);

        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->acceptJson()
            ->post($this->apiUrl('/register'), [
                'name'     => $request->name,
                'username' => $request->username,
                'password' => $request->password,
                'role'     => $request->role,
            ]);

        if ($response->successful()) {
            return redirect()->route('admin.superadmin.user.index')->with('success', 'Pengguna berhasil ditambahkan');
        }

        if ($response->status() === 422) {
            return back()->withErrors($response->json('errors'))->withInput();
        }

        return back()->with('error', $response->json('message') ?? 'Gagal menambah pengguna')->withInput();
    }

    public function editUser($id)
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl("/users/{$id}"));

        if ($response->successful()) {
            $userData = $response->json()['data'];
            $user = (object) [
                'id'         => $userData['id'],
                'name'       => $userData['name'],
                'username'   => $userData['username'],
                'role'       => $userData['role'],
                'email'      => $userData['email'] ?? '',
                'created_at' => isset($userData['created_at']) 
                                ? \Carbon\Carbon::parse($userData['created_at']) 
                                : now(),
            ];
            return view('superadmin.user.edit-user', compact('user'));
        }
        return redirect()->back()->with('error', 'User tidak ditemukan atau gagal mengambil data.');
    }

    public function updateUser(Request $request, $id)
    {
        $request->validate([
            'name' => 'required',
            'username' => 'required',
            'role' => 'required',
            'password' => 'nullable|min:6|confirmed',
        ]);

        $payload = $request->only('name', 'username', 'role');
        if ($request->filled('password')) {
            $payload['password'] = $request->password;
        }

        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->acceptJson()
            ->put($this->apiUrl("/users/{$id}"), $payload);

        if ($response->successful()) {
            return redirect()->route('admin.superadmin.user.index')->with('success', 'User berhasil diupdate');
        }

        if ($response->status() === 422) {
            return back()->withErrors($response->json('errors'))->withInput();
        }

        return redirect()->back()->with('error', 'Gagal update user.')->withInput();
    }

    // 🔥 DELETE USER
    public function destroyUser($id)
    {
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->delete($this->apiUrl('/users/' . $id));

        if ($response->successful()) {
            return redirect()->route('admin.superadmin.user.index')->with('success', 'Pengguna berhasil dihapus');
        }

        return back()->with('error', 'Gagal menghapus pengguna');
    }

    // 🔥 CREATE KEGIATAN
    public function createKegiatan()
    {
        // Ambil data users untuk dropdown pilihan pegawai (opsional)
        $usersResponse = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/users'));
            
        $users = [];
        if ($usersResponse->successful()) {
            $allUsers = $usersResponse->json()['data'] ?? [];
            // Hanya tampilkan user dengan role "user" (Pegawai/Petugas)
            $users = array_filter($allUsers, function($u) {
                return isset($u['role']) && strtolower($u['role']) === 'user';
            });
        }
        
        return view('superadmin.kegiatan.create', compact('users'));
    }

    // 🔥 STORE KEGIATAN
    public function storeKegiatan(Request $request)
    {
        $request->validate([
            'nomor_surat' => 'required|string',
            'kegiatan' => 'required|string',
            'tanggal_mulai' => 'required|date',
            'tanggal_selesai' => 'nullable|date',
            'pegawai_ids' => 'required|array',
        ]);

        $payload = [
            'nomor_surat' => $request->nomor_surat,
            'kegiatan' => $request->kegiatan,
            'tanggal_mulai' => $request->tanggal_mulai,
            'tanggal_selesai' => $request->tanggal_selesai,
            'pegawai_ids' => $request->pegawai_ids,
        ];

        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->acceptJson()
            ->post($this->apiUrl('/penugasan'), $payload);

        if ($response->successful()) {
            return redirect()->route('admin.superadmin.dashboard')->with('success', 'Tugas baru berhasil dibuat');
        }

        if ($response->status() === 422) {
            return back()->withErrors($response->json('errors'))->withInput();
        }

        return back()->with('error', 'Gagal membuat tugas baru: ' . $response->json('message', 'Error API'))->withInput();
    }


    public function export(Request $request)
    {
        $columns = $request->input('columns', []);
        
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/export-penugasan'), [
                'columns' => $columns
            ]);

        if ($response->successful()) {
            $fileName = 'Laporan_Penugasan.xlsx';
            $contentDisposition = $response->header('Content-Disposition');
            
            if ($contentDisposition && preg_match('/filename="?([^"]+)"?/', $contentDisposition, $matches)) {
                $fileName = $matches[1];
            }

            return response($response->body())
                ->header('Content-Type', $response->header('Content-Type') ?? 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
                ->header('Content-Disposition', 'attachment; filename="' . $fileName . '"');
        }

        return back()->with('error', 'Gagal mengunduh laporan: Endpoint backend mungkin bermasalah atau tidak tersedia.');
    }

    public function chartData(Request $request)
    {
        $mode = $request->get('mode', 'week');
        $response = \Illuminate\Support\Facades\Http::withToken(session('api_token'))
            ->get($this->apiUrl('/penugasan'));
            
        $items = collect([]);
        if ($response->successful()) {
            $items = collect($response->json()['data'])->filter(function($item) {
                return $item['status'] !== 'dibatalkan';
            })->map(function($item) {
                return (object) ['created_at' => \Carbon\Carbon::parse($item['created_at'])];
            });
        }
        $data = $this->buildChartData($items);

        return response()->json([
            'success' => true,
            'data'    => $data[$mode] ?? $data['week'],
        ]);
    }
}