<?php

namespace App\Http\Controllers;

use App\Http\Requests\SystemConfigRequest;
use App\Models\SystemConfig;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;

class SystemConfigController extends Controller
{
    /**
     * 系统配置列表
     */
    public function index(Request $request)
    {
        $query = SystemConfig::query()->orderBy('group', 'asc')->orderBy('sort', 'asc');

        // 筛选条件
        if ($request->filled('group')) {
            $query->where('group', $request->group);
        }

        if ($request->filled('key')) {
            $query->where('key', 'like', "%{$request->key}%");
        }

        $perPage = $request->input('limit', 100);
        $configs = $query->paginate($perPage);

        return response()->json([
            'code' => 200,
            'data' => [
                'list' => $configs->items(),
                'total' => $configs->total(),
                'current_page' => $configs->currentPage(),
                'last_page' => $configs->lastPage(),
            ],
            'message' => 'success'
        ]);
    }

    /**
     * 系统配置详情
     */
    public function show(string $id)
    {
        $config = SystemConfig::find($id);

        if (!$config) {
            return response()->json([
                'code' => 404,
                'message' => '配置不存在'
            ], 404);
        }

        return response()->json([
            'code' => 200,
            'data' => $config,
            'message' => 'success'
        ]);
    }

    /**
     * 创建系统配置
     */
    public function store(SystemConfigRequest $request)
    {
        try {
            $config = SystemConfig::create([
                'group' => $request->group,
                'key' => $request->key,
                'value' => $request->value,
                'type' => $request->type,
                'label' => $request->label,
                'description' => $request->description,
                'options' => $request->options,
                'rules' => $request->rules,
                'sort' => $request->sort ?? 0,
                'status' => $request->status ?? 'active',
            ]);

            // 清除缓存
            Cache::forget('system_config_' . $config->group . '_' . $config->key);
            Cache::forget('system_config_group_' . $config->group);

            return response()->json([
                'code' => 200,
                'data' => $config,
                'message' => '系统配置创建成功'
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'code' => 500,
                'message' => '创建失败: ' . $e->getMessage()
            ], 500);
        }
    }

    /**
     * 更新系统配置
     */
    public function update(SystemConfigRequest $request, string $id)
    {
        $config = SystemConfig::find($id);

        if (!$config) {
            return response()->json([
                'code' => 404,
                'message' => '配置不存在'
            ], 404);
        }

        try {
            $oldGroup = $config->group;
            $oldKey = $config->key;

            $config->update([
                'group' => $request->group ?? $config->group,
                'key' => $request->key ?? $config->key,
                'value' => $request->value ?? $config->value,
                'type' => $request->type ?? $config->type,
                'label' => $request->label ?? $config->label,
                'description' => $request->description ?? $config->description,
                'options' => $request->options ?? $config->options,
                'rules' => $request->rules ?? $config->rules,
                'sort' => $request->sort ?? $config->sort,
                'status' => $request->status ?? $config->status,
            ]);

            // 清除新旧缓存
            Cache::forget('system_config_' . $oldGroup . '_' . $oldKey);
            Cache::forget('system_config_group_' . $oldGroup);
            Cache::forget('system_config_' . $config->group . '_' . $config->key);
            Cache::forget('system_config_group_' . $config->group);

            return response()->json([
                'code' => 200,
                'data' => $config,
                'message' => '系统配置更新成功'
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'code' => 500,
                'message' => '更新失败: ' . $e->getMessage()
            ], 500);
        }
    }

    /**
     * 删除系统配置
     */
    public function destroy(string $id)
    {
        $config = SystemConfig::find($id);

        if (!$config) {
            return response()->json([
                'code' => 404,
                'message' => '配置不存在'
            ], 404);
        }

        try {
            // 清除缓存
            Cache::forget('system_config_' . $config->group . '_' . $config->key);
            Cache::forget('system_config_group_' . $config->group);

            $config->delete();

            return response()->json([
                'code' => 200,
                'message' => '系统配置删除成功'
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'code' => 500,
                'message' => '删除失败: ' . $e->getMessage()
            ], 500);
        }
    }

    /**
     * 获取配置值
     */
    public function getValue(Request $request)
    {
        $request->validate([
            'group' => 'required|string',
            'key' => 'required|string',
        ]);

        $cacheKey = 'system_config_' . $request->group . '_' . $request->key;
        
        $value = Cache::remember($cacheKey, 3600, function () use ($request) {
            $config = SystemConfig::where('group', $request->group)
                ->where('key', $request->key)
                ->where('status', 'active')
                ->first();

            return $config ? $config->value : null;
        });

        return response()->json([
            'code' => 200,
            'data' => [
                'group' => $request->group,
                'key' => $request->key,
                'value' => $value,
            ],
            'message' => 'success'
        ]);
    }

    /**
     * 批量获取配置值
     */
    public function batchGetValues(Request $request)
    {
        $request->validate([
            'configs' => 'required|array|min:1',
            'configs.*.group' => 'required|string',
            'configs.*.key' => 'required|string',
        ]);

        $results = [];

        foreach ($request->configs as $config) {
            $cacheKey = 'system_config_' . $config['group'] . '_' . $config['key'];
            
            $value = Cache::remember($cacheKey, 3600, function () use ($config) {
                $configItem = SystemConfig::where('group', $config['group'])
                    ->where('key', $config['key'])
                    ->where('status', 'active')
                    ->first();

                return $configItem ? $configItem->value : null;
            });

            $results[] = [
                'group' => $config['group'],
                'key' => $config['key'],
                'value' => $value,
            ];
        }

        return response()->json([
            'code' => 200,
            'data' => $results,
            'message' => 'success'
        ]);
    }

    /**
     * 获取分组配置
     */
    public function getGroupConfigs(Request $request)
    {
        $request->validate([
            'group' => 'required|string',
        ]);

        $cacheKey = 'system_config_group_' . $request->group;
        
        $configs = Cache::remember($cacheKey, 3600, function () use ($request) {
            return SystemConfig::where('group', $request->group)
                ->where('status', 'active')
                ->orderBy('sort', 'asc')
                ->get()
                ->mapWithKeys(function ($config) {
                    return [$config->key => $config->value];
                })
                ->toArray();
        });

        return response()->json([
            'code' => 200,
            'data' => [
                'group' => $request->group,
                'configs' => $configs,
            ],
            'message' => 'success'
        ]);
    }

    /**
     * 获取配置分组列表
     */
    public function getGroups()
    {
        $groups = SystemConfig::select('group')
            ->distinct()
            ->orderBy('group', 'asc')
            ->pluck('group');

        return response()->json([
            'code' => 200,
            'data' => $groups,
            'message' => 'success'
        ]);
    }

    /**
     * 批量更新配置
     */
    public function batchUpdate(Request $request)
    {
        $request->validate([
            'configs' => 'required|array|min:1',
            'configs.*.id' => 'required|integer|exists:system_configs,id',
            'configs.*.value' => 'required',
        ]);

        $successCount = 0;
        $failedConfigs = [];

        try {
            foreach ($request->configs as $configData) {
                $config = SystemConfig::find($configData['id']);

                if (!$config) {
                    $failedConfigs[] = ['id' => $configData['id'], 'reason' => '配置不存在'];
                    continue;
                }

                $config->update(['value' => $configData['value']]);

                // 清除缓存
                Cache::forget('system_config_' . $config->group . '_' . $config->key);
                Cache::forget('system_config_group_' . $config->group);

                $successCount++;
            }

            return response()->json([
                'code' => 200,
                'data' => [
                    'success_count' => $successCount,
                    'failed_configs' => $failedConfigs,
                ],
                'message' => "批量更新成功，成功 {$successCount} 个"
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'code' => 500,
                'message' => '批量更新失败: ' . $e->getMessage()
            ], 500);
        }
    }

    /**
     * 导入默认配置
     */
    public function importDefaults()
    {
        $defaultConfigs = [
            // 系统设置
            [
                'group' => 'system',
                'key' => 'site_name',
                'value' => 'ERP管理系统',
                'type' => 'text',
                'label' => '站点名称',
                'description' => '系统显示的名称',
                'sort' => 1,
            ],
            [
                'group' => 'system',
                'key' => 'site_logo',
                'value' => '',
                'type' => 'image',
                'label' => '站点Logo',
                'description' => '系统Logo图片',
                'sort' => 2,
            ],
            [
                'group' => 'system',
                'key' => 'site_favicon',
                'value' => '',
                'type' => 'image',
                'label' => '站点图标',
                'description' => '浏览器标签页图标',
                'sort' => 3,
            ],
            [
                'group' => 'system',
                'key' => 'copyright',
                'value' => '© 2026 ERP管理系统',
                'type' => 'text',
                'label' => '版权信息',
                'description' => '页面底部版权信息',
                'sort' => 4,
            ],

            // 业务设置
            [
                'group' => 'business',
                'key' => 'default_warehouse',
                'value' => '1',
                'type' => 'select',
                'label' => '默认仓库',
                'description' => '创建订单时的默认仓库',
                'sort' => 1,
            ],
            [
                'group' => 'business',
                'key' => 'auto_audit_order',
                'value' => '0',
                'type' => 'switch',
                'label' => '自动审核订单',
                'description' => '是否自动审核拉取的订单',
                'sort' => 2,
            ],
            [
                'group' => 'business',
                'key' => 'order_expire_hours',
                'value' => '24',
                'type' => 'number',
                'label' => '订单过期时间',
                'description' => '订单超过多少小时未处理自动取消（小时）',
                'sort' => 3,
            ],

            // 打印设置
            [
                'group' => 'print',
                'key' => 'default_template',
                'value' => '1',
                'type' => 'select',
                'label' => '默认打印模板',
                'description' => '发货时的默认打印模板',
                'sort' => 1,
            ],
            [
                'group' => 'print',
                'key' => 'print_auto_open',
                'value' => '1',
                'type' => 'switch',
                'label' => '自动打开打印窗口',
                'description' => '发货后是否自动打开打印窗口',
                'sort' => 2,
            ],
        ];

        $importedCount = 0;

        try {
            foreach ($defaultConfigs as $configData) {
                $exists = SystemConfig::where('group', $configData['group'])
                    ->where('key', $configData['key'])
                    ->exists();

                if (!$exists) {
                    SystemConfig::create(array_merge($configData, [
                        'status' => 'active',
                        'options' => null,
                        'rules' => null,
                    ]));
                    $importedCount++;
                }
            }

            // 清除所有配置缓存
            Cache::flush();

            return response()->json([
                'code' => 200,
                'data' => ['imported_count' => $importedCount],
                'message' => "成功导入 {$importedCount} 个默认配置"
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'code' => 500,
                'message' => '导入失败: ' . $e->getMessage()
            ], 500);
        }
    }
}