<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Setting;
use App\Services\ActivityLogger;
use App\Services\VoIP\VoIPManager;
use App\Support\SettingsCatalog;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Validator;

class SettingController extends Controller
{
    public function __construct(private VoIPManager $voipManager) {}

    public function index(): JsonResponse
    {
        Gate::authorize('viewAny', Setting::class);
        SettingsCatalog::ensureDefaults();
        $runtimeKeys = collect(SettingsCatalog::definitions())
            ->where('is_runtime_enforced', true)
            ->pluck('key');

        $settings = Setting::whereIn('key', $runtimeKeys)->get()
            ->map(function (Setting $setting) {
                $meta = SettingsCatalog::metaFor($setting->key) ?? [];
                if ($setting->is_secret) {
                    $setting->value = $setting->value ? '********' : '';
                }

                return array_merge($setting->toArray(), [
                    'label' => $meta['label'] ?? $setting->key,
                    'hint' => $meta['hint'] ?? $setting->description,
                    'used_by' => $meta['used_by'] ?? [],
                    'coming_soon' => $meta['coming_soon'] ?? ! $setting->is_runtime_enforced,
                ]);
            })
            ->groupBy('group');

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

    public function update(Request $request): JsonResponse
    {
        Gate::authorize('update', Setting::class);
        SettingsCatalog::ensureDefaults();

        $request->validate([
            'settings' => 'required|array',
            'settings.*.key' => 'required|string',
            'settings.*.value' => 'nullable',
            'settings.*.group' => 'nullable|string',
            'settings.*.type' => 'nullable|string',
        ]);

        foreach ($request->settings as $setting) {
            $existing = Setting::where('key', $setting['key'])->first();
            $this->validateSettingValue($setting, $existing);

            $oldValue = $existing?->value;
            $newValue = ($existing?->is_secret && ($setting['value'] ?? '') === '********')
                ? $oldValue
                : $this->normalizeValue($setting['value'] ?? '', $setting['type'] ?? $existing?->type ?? 'string');

            $meta = SettingsCatalog::metaFor($setting['key']);
            Setting::updateOrCreate(
                ['key' => $setting['key']],
                [
                    'value' => $newValue,
                    'group' => $meta['group'] ?? $setting['group'] ?? $existing?->group ?? 'general',
                    'type' => $meta['type'] ?? $setting['type'] ?? $existing?->type ?? 'string',
                    'default_value' => $meta['default_value'] ?? $existing?->default_value,
                    'allowed_values' => $meta['allowed_values'] ?? $existing?->allowed_values,
                    'is_secret' => $meta['is_secret'] ?? $existing?->is_secret ?? false,
                    'is_public' => $meta['is_public'] ?? $existing?->is_public ?? false,
                    'is_runtime_enforced' => $meta['is_runtime_enforced'] ?? $existing?->is_runtime_enforced ?? true,
                    'description' => $meta['hint'] ?? $existing?->description,
                ]
            );

            if ($this->isSensitiveChange($setting['key'], $meta ?? null)) {
                $old = ($existing?->is_secret ?? false) ? '[secret]' : $oldValue;
                ActivityLogger::log('sensitive_setting_changed', "Setting {$setting['key']} changed from {$old}");
            }
        }

        ActivityLogger::log('settings_updated', 'System settings updated');

        return response()->json(['message' => 'تنظیمات ذخیره شد']);
    }

    public function public(): JsonResponse
    {
        SettingsCatalog::ensureDefaults();
        $publicRuntimeKeys = collect(SettingsCatalog::definitions())
            ->where('is_runtime_enforced', true)
            ->where('is_public', true)
            ->pluck('key');
        $settings = Setting::whereIn('key', $publicRuntimeKeys)->get()
            ->filter(fn (Setting $setting) => ! $setting->is_secret)
            ->mapWithKeys(fn (Setting $setting) => [$setting->key => $setting->effectiveValue()]);

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

    public function testVoip(): JsonResponse
    {
        Gate::authorize('viewAny', Setting::class);
        $provider = Setting::where('key', 'voip_provider')->value('value') ?: 'none';
        $missing = [];
        if ($provider === 'ami') {
            foreach (['voip_ami_host', 'voip_ami_port', 'voip_ami_username', 'voip_ami_secret', 'voip_ami_channel_technology', 'voip_ami_context'] as $key) {
                if (! Setting::where('key', $key)->value('value')) {
                    $missing[] = $key;
                }
            }
        }
        if ($provider === 'api') {
            foreach (['voip_api_base_url', 'voip_api_token'] as $key) {
                if (! Setting::where('key', $key)->value('value')) {
                    $missing[] = $key;
                }
            }
        }
        if ($provider === 'socket') {
            foreach (['voip_socket_host', 'voip_socket_port'] as $key) {
                if (! Setting::where('key', $key)->value('value')) {
                    $missing[] = $key;
                }
            }
        }

        ActivityLogger::log('voip_connection_tested', "VoIP provider {$provider} tested");
        if ($missing === []) {
            $result = $this->voipManager->testConnection();

            return response()->json([
                'ok' => (bool) ($result['ok'] ?? false),
                'provider' => $provider,
                'message' => $result['message'] ?? 'نتیجه تست اتصال مشخص نیست.',
                'missing' => $result['missing'] ?? [],
            ]);
        }

        return response()->json([
            'ok' => ! $missing,
            'provider' => $provider,
            'message' => $missing ? 'تنظیمات اتصال کامل نیست.' : 'تنظیمات اتصال معتبر است.',
            'missing' => $missing,
        ]);
    }

    public function testVoipCall(Request $request): JsonResponse
    {
        Gate::authorize('update', Setting::class);
        $validated = $request->validate([
            'phone' => ['required', 'string', 'max:30', 'regex:/^[0-9+*#]+$/'],
            'extension' => ['required', 'string', 'max:20', 'regex:/^[0-9*#]+$/'],
        ]);
        $result = $this->voipManager->initiateCall($validated['phone'], $validated['extension']);
        ActivityLogger::log('voip_test_call_requested', 'A real VoIP test call was requested', null, null, [
            'success' => (bool) ($result['success'] ?? false),
            'status' => $result['status'] ?? null,
        ]);

        return response()->json([
            'ok' => (bool) ($result['success'] ?? false),
            'message' => $result['message'] ?? 'نتیجه تماس آزمایشی مشخص نیست.',
            'provider_call_id' => $result['provider_call_id'] ?? null,
            'status' => $result['status'] ?? null,
        ], ($result['success'] ?? false) ? 200 : 422);
    }

    private function validateSettingValue(array $payload, ?Setting $existing): void
    {
        $type = $payload['type'] ?? $existing?->type ?? 'string';
        $value = $payload['value'] ?? '';
        $rules = $existing?->validation_rules ?: match ($type) {
            'boolean' => ['in:true,false,1,0'],
            'integer' => ['integer'],
            default => ['nullable', 'string'],
        };
        if ($type === 'boolean') {
            $rules = ['in:true,false,1,0'];
        }

        if ($existing?->allowed_values) {
            $rules[] = 'in:'.implode(',', $existing->allowed_values);
        }

        Validator::make(['value' => $value], ['value' => $rules])->validate();
    }

    private function normalizeValue(mixed $value, string $type): string
    {
        return match ($type) {
            'boolean' => filter_var($value, FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false',
            'integer' => (string) (int) $value,
            default => (string) $value,
        };
    }

    private function isSensitiveChange(string $key, ?array $meta): bool
    {
        return ($meta['is_secret'] ?? false)
            || in_array($meta['group'] ?? '', ['security', 'import_export', 'voip'], true)
            || str_contains($key, 'password')
            || str_contains($key, 'token')
            || str_contains($key, 'export');
    }
}