<?php

namespace App\Http\Controllers\API\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Validator;

/**
 * 检查项目规则控制器
 */
class ItemRuleController extends Controller
{
    /**
     * 获取规则类型定义
     */
    public function getTypes(Request $request)
    {
        $types = config('item_rule');

        $formattedTypes = [];
        foreach ($types as $key => $type) {
            $formattedTypes[] = [
                'key' => $key,
                'name' => $type['name'],
                'description' => $type['description'],
                'fields' => $type['fields'],
            ];
        }

        return response()->json([
            'success' => true,
            'data' => [
                'types' => $formattedTypes,
            ]
        ]);
    }

    /**
     * 获取已绑定的规则列表
     */
    public function index(Request $request)
    {
        $validated = $request->validate([
            'target_type' => 'required|in:ITEM,GROUP',
            'target_id' => 'required|integer|min:1',
        ]);

        $targetType = $validated['target_type'];
        $targetId = $validated['target_id'];

        // 获取规则列表
        $rules = DB::table('exam_item_rule as eir')
            ->where('eir.target_type', $targetType)
            ->where('eir.target_id', $targetId)
            ->where('eir.deleted', 0)
            ->orderBy('eir.id')
            ->get()
            ->toArray();

        // 获取规则类型定义
        $typeDefinitions = config('item_rule');

        $formattedRules = [];
        foreach ($rules as $rule) {
            $typeDef = $typeDefinitions[$rule->rule_type] ?? null;

            $formattedRules[] = [
                'id' => $rule->id,
                'target_type' => $rule->target_type,
                'target_id' => $rule->target_id,
                'rule_type' => $rule->rule_type,
                'rule_name' => $typeDef['name'] ?? $rule->rule_type,
                'rule_value' => json_decode($rule->rule_value, true),
                'status' => $rule->status,
                'created_at' => $rule->created_at,
            ];
        }

        return response()->json([
            'success' => true,
            'data' => [
                'rules' => $formattedRules,
            ]
        ]);
    }

    /**
     * 新增/更新规则绑定
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'id' => 'nullable|integer|min:1',
            'target_type' => 'required|in:ITEM,GROUP',
            'target_id' => 'required|integer|min:1',
            'rule_type' => 'required|string',
            'rule_value' => 'required|array',
            'status' => 'nullable|integer|in:0,1',
        ]);

        $typeDefinitions = config('item_rule');

        // 验证规则类型是否存在
        if (!isset($typeDefinitions[$validated['rule_type']])) {
            return response()->json([
                'success' => false,
                'message' => '规则类型不存在',
            ], 400);
        }

        // 验证规则值字段
        $fields = $typeDefinitions[$validated['rule_type']]['fields'] ?? [];
        foreach ($fields as $field) {
            $key = $field['key'];
            $validation = $field['validation'] ?? null;

            if ($validation && !isset($validated['rule_value'][$key])) {
                return response()->json([
                    'success' => false,
                    'message' => "规则值缺少必填字段：{$field['label']}",
                ], 400);
            }
        }

        $data = [
            'target_type' => $validated['target_type'],
            'target_id' => $validated['target_id'],
            'rule_type' => $validated['rule_type'],
            'rule_value' => json_encode($validated['rule_value']),
            'status' => $validated['status'] ?? 1,
            'updated_at' => now(),
        ];

        // 判断是新增还是更新
        if (isset($validated['id'])) {
            // 更新
            $id = $validated['id'];
            $exists = DB::table('exam_item_rule')
                ->where('id', $id)
                ->where('deleted', 0)
                ->exists();

            if (!$exists) {
                return response()->json([
                    'success' => false,
                    'message' => '规则不存在',
                ], 404);
            }

            DB::table('exam_item_rule')->where('id', $id)->update($data);

            return response()->json([
                'success' => true,
                'data' => [
                    'id' => $id,
                ],
            ]);
        } else {
            // 新增
            $data['deleted'] = 0;
            $data['created_at'] = now();
            $ruleId = DB::table('exam_item_rule')->insertGetId($data);

            return response()->json([
                'success' => true,
                'data' => [
                    'id' => $ruleId,
                ],
            ]);
        }
    }

    /**
     * 删除规则绑定
     */
    public function destroy(Request $request)
    {
        $validated = $request->validate([
            'id' => 'required|integer|min:1',
        ]);

        $id = $validated['id'];

        $rule = DB::table('exam_item_rule')->where('id', $id)->first();

        if (!$rule) {
            return response()->json([
                'success' => false,
                'message' => '规则不存在',
            ], 404);
        }

        // 逻辑删除
        DB::table('exam_item_rule')->where('id', $id)->update([
            'deleted' => 1,
            'updated_at' => now(),
        ]);

        return response()->json([
            'success' => true,
            'data' => null,
        ]);
    }

}