<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Customer;
use App\Models\PargarSyncLog;
use App\Services\ConfigService;
use App\Services\PargarInboundWalletService;
use App\Services\PargarSyncService;
use Illuminate\Http\Request;

class PargarController extends Controller
{
    protected function sync(): PargarSyncService
    {
        return app(PargarSyncService::class);
    }

    public function table(Request $request)
    {
        $query = PargarSyncLog::with('customer')->orderByDesc('id');
        \App\DB\Te\TableEngine::create($query, $request)
            ->initSearch(['desc', 'type'])
            ->select(['*'])
            ->export($query);

        return response()->json($query);
    }

    public function show($id)
    {
        return response()->json(PargarSyncLog::with('customer')->findOrFail($id));
    }

    public function customerSyncStatus(Request $request)
    {
        $panelTotal = Customer::whereNull('deleted_at')->count();
        $panelRegistered = Customer::whereNull('deleted_at')->whereNotNull('pargar_account_id')->count();
        $panelOnly = $panelTotal - $panelRegistered;

        $panelOnlyQuery = Customer::whereNull('deleted_at')
            ->whereNull('pargar_account_id')
            ->select('id', 'name', 'mobile', 'created_at');

        if ($search = $request->input('search')) {
            $panelOnlyQuery->where(function ($q) use ($search) {
                $q->where('name', 'like', "%{$search}%")
                    ->orWhere('mobile', 'like', "%{$search}%");
            });
        }

        $panelOnlyList = $panelOnlyQuery->orderBy('id')->paginate(20);

        $inboundOnlyQuery = PargarSyncLog::query()
            ->where('type', 'customer')
            ->where('sync_status', PargarSyncService::STATUS_SUCCESS)
            ->whereNotNull('pargar_ref')
            ->latest('id');

        $inboundOnlyCount = (clone $inboundOnlyQuery)->count();
        $inboundSample = $inboundOnlyQuery->limit(100)->get(['id', 'customer_id', 'pargar_ref', 'created_at']);

        return response()->json([
            'panel_total' => $panelTotal,
            'panel_registered' => $panelRegistered,
            'panel_only' => $panelOnly,
            'pargar_total' => $panelRegistered + $inboundOnlyCount,
            'pargar_only_count' => max(0, $inboundOnlyCount),
            'panel_only_list' => $panelOnlyList,
            'pargar_only_list' => [
                'data' => $inboundSample->map(fn ($row) => [
                    'code' => $row->pargar_ref,
                    'name' => $row->customer?->name ?? '',
                    'tel' => $row->customer?->mobile ?? '',
                    'gid' => null,
                    'group' => '',
                ])->values(),
                'total' => $inboundOnlyCount,
                'current_page' => 1,
                'last_page' => 1,
            ],
        ]);
    }

    public function syncPanelToPargar()
    {
        $customers = Customer::whereNull('deleted_at')
            ->whereNull('pargar_account_id')
            ->get(['id', 'name', 'mobile']);

        $success = 0;
        $failed = 0;
        $errors = [];

        foreach ($customers as $customer) {
            $result = $this->sync()->registerCustomer($customer);
            if ($result['ok'] ?? false) {
                $success++;
            } else {
                $failed++;
                $errors[] = [
                    'name' => $customer->name,
                    'mobile' => $customer->mobile,
                    'error' => $result['message'] ?? '',
                ];
            }
        }

        return response()->json([
            'ok' => true,
            'success' => $success,
            'failed' => $failed,
            'errors' => $errors,
        ]);
    }

    public function importFromPargar(Request $request)
    {
        $validated = $request->validate([
            'customers' => 'required|array',
            'customers.*.code' => 'required',
            'customers.*.name' => 'required|string',
            'customers.*.tel' => 'nullable|string',
        ]);

        $success = 0;
        $failed = 0;
        $errors = [];

        foreach ($validated['customers'] as $item) {
            $mobile = Customer::normalizeMobile($item['tel'] ?? '') ?? '';
            $fullName = trim($item['name']);
            $accountId = (string) $item['code'];

            $existing = Customer::whereNull('deleted_at')
                ->where('pargar_account_id', $accountId)
                ->first();

            if ($existing) {
                $success++;
                continue;
            }

            if ($mobile !== '') {
                $byMobile = Customer::findActiveByMobile($mobile);
                if ($byMobile) {
                    $currentAccount = (string) ($byMobile->pargar_account_id ?? '');
                    if ($currentAccount !== '' && $currentAccount !== $accountId) {
                        $failed++;
                        $errors[] = [
                            'name' => $item['name'],
                            'code' => $item['code'],
                            'error' => 'شماره موبایل تکراری است',
                        ];
                        continue;
                    }

                    $byMobile->pargar_account_id = $accountId;
                    if ($fullName !== '') {
                        $byMobile->fname = $fullName;
                        $byMobile->name = $fullName;
                    }
                    $byMobile->save();
                    $success++;
                    continue;
                }
            }

            $byAccount = Customer::whereNull('deleted_at')
                ->where('pargar_account_id', $accountId)
                ->first();
            if ($byAccount) {
                $failed++;
                $errors[] = [
                    'name' => $item['name'],
                    'code' => $item['code'],
                    'error' => 'کد حساب پرگار قبلاً ثبت شده است',
                ];
                continue;
            }

            try {
                $customer = new Customer();
                $customer->fname = $fullName;
                $customer->lname = '';
                $customer->name = $fullName;
                $customer->mobile = $mobile;
                $customer->active = true;
                $customer->pargar_account_id = $accountId;
                $customer->referral_id = $this->uniqueReferralId();
                $customer->type = 2;
                if ($mobile !== '') {
                    $customer->password = $mobile;
                }
                $customer->save();
                $success++;
            } catch (\Throwable $e) {
                $failed++;
                $errors[] = ['name' => $item['name'], 'code' => $item['code'], 'error' => $e->getMessage()];
            }
        }

        return response()->json([
            'ok' => true,
            'success' => $success,
            'failed' => $failed,
            'errors' => $errors,
        ]);
    }

    public function rollbackImport(Request $request)
    {
        $baseQuery = fn () => Customer::whereNotNull('pargar_account_id')
            ->where(function ($q) {
                $q->whereNull('name')->orWhere('name', '');
            });

        $count = $baseQuery()->count();
        $sample = $baseQuery()
            ->select('id', 'fname', 'name', 'mobile', 'pargar_account_id', 'created_at')
            ->orderByDesc('id')
            ->limit(20)
            ->get();

        if ($request->boolean('dry_run')) {
            return response()->json([
                'dry_run' => true,
                'count' => $count,
                'sample' => $sample,
            ]);
        }

        $deleted = $baseQuery()->forceDelete();

        return response()->json([
            'ok' => true,
            'deleted' => $deleted,
        ]);
    }

    public function retrySanad($id)
    {
        $log = PargarSyncLog::with('customer')->findOrFail($id);
        $result = $this->sync()->retry($log);

        return response()->json($result, ($result['ok'] ?? false) ? 200 : 422);
    }

    public function registerCustomer($customerId)
    {
        $customer = Customer::findOrFail($customerId);
        $result = $this->sync()->registerCustomer($customer);

        return response()->json($result, ($result['ok'] ?? false) ? 200 : 422);
    }

    public function syncCustomerWallet($customerId)
    {
        if (! app(ConfigService::class)->isPargarAccounting()) {
            return response()->json([
                'ok' => false,
                'message' => 'حسابداری پرگار فعال نیست',
            ], 422);
        }

        $customer = Customer::findOrFail($customerId);
        if (trim((string) ($customer->pargar_account_id ?? '')) === '') {
            return response()->json([
                'ok' => false,
                'message' => 'این مشتری کد حساب پرگار ندارد',
            ], 422);
        }

        $result = app(PargarInboundWalletService::class)->syncWalletFromPargar($customer);
        $appliedDocs = (int) ($result['documents']['applied'] ?? 0);
        $appliedMande = (bool) ($result['mande']['applied'] ?? false);
        $mandeMessage = (string) ($result['mande']['message'] ?? '');

        $messages = [];
        if ($appliedDocs > 0) {
            $messages[] = "{$appliedDocs} سند از پرگار اعمال شد";
        }
        if ($appliedMande) {
            $messages[] = 'ماندهٔ پرگار روی کیف اعمال شد';
        }
        if ($mandeMessage !== '' && ! $appliedMande) {
            $messages[] = $mandeMessage;
        }

        return response()->json([
            'ok' => $appliedDocs > 0 || $appliedMande,
            'message' => $messages !== []
                ? implode(' — ', $messages)
                : 'سند قابل‌اعمالی یافت نشد',
            'result' => $result,
        ], $appliedDocs > 0 || $appliedMande ? 200 : 422);
    }

    private function uniqueReferralId(): string
    {
        do {
            $referral = substr(str_shuffle('0123456789abcdefghijklmnopqrstuvwxyz'), 0, 4);
        } while (Customer::where('referral_id', $referral)->exists());

        return $referral;
    }
}