<?php

namespace App\Services\System;

use App\Models\System\Dictionary;
use App\Models\System\DictionaryItem;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Validator;

class DictionaryService
{
    public function getList(array $params): array
    {
        $query = Dictionary::query();

        if (!empty($params['keyword'])) {
            $query->where(function ($q) use ($params) {
                $q->where('name', 'like', '%' . $params['keyword'] . '%')
                    ->orWhere('code', 'like', '%' . $params['keyword'] . '%');
            });
        }

        // 处理状态筛选：只接受布尔值或数字1/0
        if (array_key_exists('status', $params) && is_bool($params['status'])) {
            $query->where('status', $params['status']);
        }

        $pageSize = $params['page_size'] ?? 20;
        $list = $query->orderBy('sort')->orderBy('id')->paginate($pageSize);

        return [
            'list' => $list->items(),
            'total' => $list->total(),
            'page' => $list->currentPage(),
            'page_size' => $list->perPage(),
        ];
    }

    public function getAll(): array
    {
        $cacheKey = 'system:dictionaries:all';
        $dictionaries = Cache::get($cacheKey);

        if ($dictionaries === null) {
            $dictionaries = Dictionary::where('status', true)
                ->orderBy('sort')
                ->get()
                ->toArray();
            Cache::put($cacheKey, $dictionaries, 3600);
        }

        return $dictionaries;
    }

    public function getById(int $id): ?Dictionary
    {
        $cacheKey = 'system:dictionaries:' . $id;
        $dictionary = Cache::get($cacheKey);

        if ($dictionary === null) {
            $dictionary = Dictionary::with('items')->find($id);
            if ($dictionary) {
                Cache::put($cacheKey, $dictionary->toArray(), 3600);
            }
        }

        return $dictionary ? $dictionary : null;
    }

    public function getByCode(string $code): ?Dictionary
    {
        $cacheKey = 'system:dictionaries:code:' . $code;
        $dictionary = Cache::get($cacheKey);

        if ($dictionary === null) {
            $dictionary = Dictionary::where('code', $code)->first();
            if ($dictionary) {
                Cache::put($cacheKey, $dictionary->toArray(), 3600);
            }
        }

        return $dictionary;
    }

    public function getItemsByCode(string $code): array
    {
        $cacheKey = 'system:dictionary:' . $code;
        $items = Cache::get($cacheKey);

        if ($items === null) {
            $dictionary = Dictionary::where('code', $code)->first();
            if ($dictionary) {
                $items = DictionaryItem::where('dictionary_id', $dictionary->id)
                    ->where('status', true)
                    ->orderBy('sort')
                    ->get()
                    ->toArray();
                Cache::put($cacheKey, $items, 3600);
            } else {
                $items = [];
            }
        }

        return $items;
    }

    public function create(array $data): Dictionary
    {
        Validator::make($data, [
            'name' => 'required|string|max:100',
            'code' => 'required|string|max:50|unique:system_dictionaries,code',
        ])->validate();

        $dictionary = Dictionary::create($data);
        $this->clearCache();
        return $dictionary;
    }

    public function update(int $id, array $data): Dictionary
    {
        $dictionary = Dictionary::findOrFail($id);

        Validator::make($data, [
            'name' => 'sometimes|required|string|max:100',
            'code' => 'sometimes|required|string|max:50|unique:system_dictionaries,code,' . $id,
        ])->validate();

        $dictionary->update($data);
        $this->clearCache();
        return $dictionary;
    }

    public function delete(int $id): bool
    {
        $dictionary = Dictionary::findOrFail($id);
        DictionaryItem::where('dictionary_id', $id)->delete();
        $dictionary->delete();
        $this->clearCache();
        return true;
    }

    public function batchDelete(array $ids): bool
    {
        DictionaryItem::whereIn('dictionary_id', $ids)->delete();
        Dictionary::whereIn('id', $ids)->delete();
        $this->clearCache();
        return true;
    }

    public function batchUpdateStatus(array $ids, bool $status): bool
    {
        Dictionary::whereIn('id', $ids)->update(['status' => $status]);
        $this->clearCache();
        return true;
    }

    private function clearCache($dictionaryId = null): void
    {
        // 清理所有字典列表缓存
        Cache::forget('system:dictionaries:all');

        if ($dictionaryId) {
            // 清理特定字典的缓存
            $dictionary = Dictionary::find($dictionaryId);
            if ($dictionary) {
                Cache::forget('system:dictionaries:' . $dictionaryId);
                Cache::forget('system:dictionaries:code:' . $dictionary->code);
                Cache::forget('system:dictionary:' . $dictionary->code);
            }
        } else {
            // 清理所有字典缓存
            $codes = Dictionary::pluck('code')->toArray();
            foreach ($codes as $code) {
                Cache::forget('system:dictionary:' . $code);
                Cache::forget('system:dictionaries:code:' . $code);
            }
        }
    }

    public function getItemsList(array $params): array
    {
        $query = DictionaryItem::query();

        if (!empty($params['dictionary_id'])) {
            $query->where('dictionary_id', $params['dictionary_id']);
        }

        // 处理状态筛选：只接受布尔值或数字1/0
        if (array_key_exists('status', $params) && is_bool($params['status'])) {
            $query->where('status', $params['status']);
        }

        $query->orderBy('sort')->orderBy('id');

        $pageSize = $params['page_size'] ?? 20;
        $list = $query->paginate($pageSize);

        return [
            'list' => $list->items(),
            'total' => $list->total(),
            'page' => $list->currentPage(),
            'page_size' => $list->perPage(),
        ];
    }

    public function createItem(array $data): DictionaryItem
    {
        Validator::make($data, [
            'dictionary_id' => 'required|exists:system_dictionaries,id',
            'label' => 'required|string|max:100',
            'value' => 'required|string|max:100',
        ])->validate();

        $item = DictionaryItem::create($data);
        $this->clearCache($data['dictionary_id']);
        return $item;
    }

    public function updateItem(int $id, array $data): DictionaryItem
    {
        $item = DictionaryItem::findOrFail($id);

        Validator::make($data, [
            'dictionary_id' => 'sometimes|required|exists:system_dictionaries,id',
            'label' => 'sometimes|required|string|max:100',
            'value' => 'sometimes|required|string|max:100',
        ])->validate();

        $item->update($data);
        $this->clearCache($item->dictionary_id);
        return $item;
    }

    public function deleteItem(int $id): bool
    {
        $item = DictionaryItem::findOrFail($id);
        $dictionaryId = $item->dictionary_id;
        $item->delete();
        $this->clearCache($dictionaryId);
        return true;
    }

    public function batchDeleteItems(array $ids): bool
    {
        $items = DictionaryItem::whereIn('id', $ids)->get();
        $dictionaryIds = $items->pluck('dictionary_id')->unique()->toArray();

        DictionaryItem::whereIn('id', $ids)->delete();

        // 清理相关字典的缓存
        foreach ($dictionaryIds as $dictionaryId) {
            $this->clearCache($dictionaryId);
        }

        return true;
    }

    public function batchUpdateItemsStatus(array $ids, bool $status): bool
    {
        $items = DictionaryItem::whereIn('id', $ids)->get();
        $dictionaryIds = $items->pluck('dictionary_id')->unique()->toArray();

        DictionaryItem::whereIn('id', $ids)->update(['status' => $status]);

        // 清理相关字典的缓存
        foreach ($dictionaryIds as $dictionaryId) {
            $this->clearCache($dictionaryId);
        }

        return true;
    }
}