<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\ValidationException;

final class MenuBadgeAdminService
{
    private function ready(): void
    {
        if (!Schema::hasTable('menu_badge_configs')) {
            throw ValidationException::withMessages(['config' => '菜单角标配置未初始化，请先完成系统更新']);
        }
    }

    private function badgeTexts(array $texts): array
    {
        $rules = [];
        $messages = [];
        foreach (['zh' => '中文', 'en' => '英文', 'vi' => '越南文'] as $lang => $label) {
            $rules[$lang] = ['required', 'array:text'];
            $rules[$lang . '.text'] = ['required', 'string', 'max:100'];
            $messages[$lang . '.required'] = $label . '角标不能为空';
            $messages[$lang . '.text.required'] = $label . '角标不能为空';
        }
        $result = Validator::make($texts, $rules, $messages)->validate();
        foreach ($result as $lang => &$text) {
            if (preg_replace('/[\s\p{Z}\x{200B}\x{FEFF}]+/u', '', $text['text']) === '') {
                throw ValidationException::withMessages(['badge_translations.' . $lang . '.text' => '角标不能为空']);
            }
            $text['text'] = trim($text['text']);
        }
        unset($text);

        return $result;
    }

    private function row(object $row): array
    {
        return [
            'id' => (int) $row->id,
            'menu_text' => (string) $row->menu_text,
            'badge_translations' => json_decode((string) $row->badge_translations, true) ?: [
                'zh' => ['text' => ''], 'en' => ['text' => ''], 'vi' => ['text' => ''],
            ],
            'sort' => (int) $row->sort,
            'status' => (int) ($row->status ?? 1),
            'created_at' => (string) $row->created_at,
            'updated_at' => (string) $row->updated_at,
        ];
    }

    public function listing(): array
    {
        $this->ready();
        $rows = DB::table('menu_badge_configs')->orderBy('sort')->orderBy('id')->get();

        return ['total' => $rows->count(), 'data' => $rows->map(fn ($row) => $this->row($row))->all()];
    }

    public function save(array $input): array
    {
        $this->ready();
        $data = Validator::make($input, [
            'id' => ['nullable', 'integer', 'min:1'],
            'menu_text' => ['required', 'string', 'max:200'],
            'badge_translations' => ['required', 'array:zh,en,vi'],
            'sort' => ['nullable', 'integer', 'min:0', 'max:9999'],
            'status' => ['nullable', 'integer', 'in:0,1'],
        ])->validate();
        $data['menu_text'] = trim($data['menu_text']);
        if ($data['menu_text'] === '') {
            throw ValidationException::withMessages(['menu_text' => '菜单文本不能为空']);
        }
        $data['badge_translations'] = $this->badgeTexts($data['badge_translations']);
        $sort = array_key_exists('sort', $data) && $data['sort'] !== null ? (int) $data['sort'] : null;
        $status = array_key_exists('status', $data) && $data['status'] !== null ? (int) $data['status'] : null;

        return DB::transaction(function () use ($data, $sort, $status) {
            $now = now()->format('Y-m-d H:i:s');
            $payload = [
                'menu_text' => $data['menu_text'],
                'badge_translations' => json_encode($data['badge_translations'], JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR),
                'updated_at' => $now,
            ];
            if (!empty($data['id'])) {
                $before = DB::table('menu_badge_configs')->where('id', $data['id'])->lockForUpdate()->first();
                if (!$before) {
                    throw ValidationException::withMessages(['id' => '配置不存在']);
                }
                if ($sort !== null) {
                    $payload['sort'] = $sort;
                }
                if ($status !== null) {
                    $payload['status'] = $status;
                }
                DB::table('menu_badge_configs')->where('id', $data['id'])->update($payload);
                OperationAuditService::record('menu_badge_config', (int) $data['id'], 'update', $this->row($before), $data);
                $id = (int) $data['id'];
            } else {
                $payload['sort'] = $sort ?? (int) DB::table('menu_badge_configs')->max('sort') + 1;
                $payload['status'] = $status ?? 1;
                $payload['created_at'] = $now;
                $id = (int) DB::table('menu_badge_configs')->insertGetId($payload);
                OperationAuditService::record('menu_badge_config', $id, 'create', [], $data + ['id' => $id]);
            }
            $saved = DB::table('menu_badge_configs')->where('id', $id)->first();

            return $this->row($saved);
        });
    }

    public function delete(array $input): array
    {
        $this->ready();
        $data = Validator::make($input, ['id' => ['required', 'integer', 'min:1']])->validate();

        return DB::transaction(function () use ($data) {
            $before = DB::table('menu_badge_configs')->where('id', $data['id'])->lockForUpdate()->first();
            if (!$before) {
                throw ValidationException::withMessages(['id' => '配置不存在']);
            }
            DB::table('menu_badge_configs')->where('id', $data['id'])->delete();
            OperationAuditService::record('menu_badge_config', (int) $data['id'], 'delete', $this->row($before), []);

            return ['id' => (int) $data['id']];
        });
    }

    public function status(array $input): array
    {
        $this->ready();
        $data = Validator::make($input, [
            'id' => ['required', 'integer', 'min:1'],
            'status' => ['required', 'integer', 'in:0,1'],
        ])->validate();

        return DB::transaction(function () use ($data) {
            $before = DB::table('menu_badge_configs')->where('id', $data['id'])->lockForUpdate()->first();
            if (!$before) {
                throw ValidationException::withMessages(['id' => '配置不存在']);
            }
            if ((int) $data['status'] === 1) {
                $this->badgeTexts(json_decode((string) $before->badge_translations, true) ?: []);
            }
            DB::table('menu_badge_configs')->where('id', $data['id'])->update([
                'status' => (int) $data['status'],
                'updated_at' => now()->format('Y-m-d H:i:s'),
            ]);
            OperationAuditService::record('menu_badge_config', (int) $data['id'], 'status', $this->row($before), $data);
            $saved = DB::table('menu_badge_configs')->where('id', $data['id'])->first();

            return $this->row($saved);
        });
    }
}