<?php
namespace App\Admin\Controllers;

use App\Http\Controllers\Controller;
use App\Model\MedicalCalculator;
use App\Model\MedicalQuestion;
use App\Model\MedicalOption;
use Encore\Admin\Form;
use Encore\Admin\Grid;
use Encore\Admin\Facades\Admin;
use Encore\Admin\Layout\Content;
use Encore\Admin\Controllers\ModelForm;
use Illuminate\Http\Request;
use App\Admin\Actions\BatchDeleteAction;

class MedicalCalculatorController extends Controller
{
    use ModelForm;

    /**
     * 显示医学计算器列表
     *
     * @OA\Get(
     *     path="/api/medical-calculators",
     *     summary="获取医学计算器列表",
     *     tags={"医学计算器"},
     *     @OA\Response(
     *         response=200,
     *         description="成功",
     *         @OA\JsonContent(type="array", @OA\Items(ref="#/components/schemas/MedicalCalculator"))
     *     )
     * )
     */
    public function index()
    {
        return Admin::content(function (Content $content) {
            $content->header('医学计算器');
            $content->description('列表');
            $content->body($this->grid());
        });
    }

    /**
     * 创建新的医学计算器
     *
     * @OA\Post(
     *     path="/api/medical-calculators",
     *     summary="创建新的医学计算器",
     *     tags={"医学计算器"},
     *     @OA\RequestBody(
     *         required=true,
     *         @OA\JsonContent(ref="#/components/schemas/MedicalCalculator")
     *     ),
     *     @OA\Response(
     *         response=201,
     *         description="创建成功",
     *         @OA\JsonContent(ref="#/components/schemas/MedicalCalculator")
     *     )
     * )
     */
    public function create()
    {
        return Admin::content(function (Content $content) {
            $content->header('医学计算器');
            $content->description('新增');
            $content->body($this->form());
        });
    }

    /**
     * 编辑现有的医学计算器
     *
     * @OA\Get(
     *     path="/api/medical-calculators/{id}",
     *     summary="编辑现有的医学计算器",
     *     tags={"医学计算器"},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="成功",
     *         @OA\JsonContent(ref="#/components/schemas/MedicalCalculator")
     *     )
     * )
     *
     * @param int $id 医学计算器ID
     */
    public function edit($id)
    {
        return Admin::content(function (Content $content) use ($id) {
            $content->header('医学计算器');
            $content->description('编辑');
            $content->body($this->form($id)->edit($id)); // 传递 $id 给 form 方法
        });
    }

    /**
     * 计算医学计算器的结果
     *
     * @OA\Post(
     *     path="/api/medical-calculators/{id}/calculate",
     *     summary="计算医学计算器的结果",
     *     tags={"医学计算器"},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\RequestBody(
     *         required=true,
     *         @OA\JsonContent(type="object")
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="计算结果",
     *         @OA\JsonContent(type="object", @OA\Property(property="result", type="string"))
     *     )
     * )
     *
     * @param Request $request 请求对象
     * @param int $id 医学计算器ID
     * @return \Illuminate\Http\JsonResponse 计算结果的JSON响应
     */
    public function calculate(Request $request, $id)
    {
        $calculator = MedicalCalculator::findOrFail($id);
        $inputs = $request->all();

        try {
            $result = $calculator->calculateResult($inputs);
            return response()->json(['result' => $result]);
        } catch (\Exception $e) {
            return response()->json(['error' => $e->getMessage()], 400);
        }
    }

    /**
     * 获取指定计算器的问题
     *
     * @OA\Get(
     *     path="/api/medical-calculators/{id}/questions",
     *     summary="获取指定计算器的问题",
     *     tags={"医学计算器"},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         @OA\Schema(type="integer")
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="成功",
     *         @OA\JsonContent(type="array", @OA\Items(ref="#/components/schemas/MedicalQuestion"))
     *     )
     * )
     *
     * @param int $id 医学计算器ID
     * @return \Illuminate\Http\JsonResponse 问题列表的JSON响应
     */
    public function getQuestions($id)
    {
        $questions = MedicalQuestion::where('medical_calculator_id', $id)->with('options')->get();
        return response()->json($questions);
    }

    /**
     * 定义医学计算器的表单
     *
     * @param int|null $id 医学计算器ID
     * @return \Encore\Admin\Form 表单对象
     */
    protected function form($id = null)
    {
        return Admin::form(MedicalCalculator::class, function (Form $form) use ($id) {
            $form->text('name', '计算器名称');
            $form->text('disease_name', '疾病名称')->rules('nullable');

            // 确保传递正确的 calculatorId
            $calculatorId = $id ?? $form->model()->id;
            $form->html($this->questionsForm($calculatorId));

            $form->textarea('formula', '计算公式')->help('直接使用问题的变量名称，例如: weight / (height * height)');

            $form->table('results', '结果对照表', function ($table) {
                $table->decimal('min_score', 8, 2, '最小分数')->rules('required|numeric');
                $table->decimal('max_score', 8, 2, '最大分数')->rules('required|numeric');
                $table->text('result', '结果描述');
            })->default([])->customFormat(function ($value) {
                if (empty($value)) {
                    return [];
                }
                if (is_string($value)) {
                    $decoded = json_decode($value, true);
                    return is_array($decoded) ? array_values($decoded) : [];
                }
                return is_array($value) ? array_values($value) : [];
            });

            $form->textarea('instructions', '使用说明')->rules('nullable');

            $form->saving(function (Form $form) {
                if (empty($form->results)) {
                    $form->results = [];
                } elseif (is_array($form->results)) {
                    $form->results = array_values($form->results);
                }
            });

            $form->saved(function (Form $form) {
                $this->saveQuestions($form);
                admin_toastr('保存成功', 'success');
                return redirect()->route('admin.medical-calculators.index');
            });

            // 在表单显示之前处理 results 字段
            if ($form->isEditing()) {
                $form->editing(function (Form $form) {
                    $results = $form->model()->results;
                    if (is_string($results)) {
                        $decoded = json_decode($results, true);
                        $form->results = is_array($decoded) ? array_values($decoded) : [];
                    } elseif (!is_array($results)) {
                        $form->results = [];
                    } else {
                        $form->results = array_values($results);
                    }
                });
            }

            Admin::script($this->questionsScript());
        });
    }

    /**
     * 生成问题表单的HTML
     *
     * @param int $calculatorId 医学计算器ID
     * @return string 问题表单的HTML
     */
    protected function questionsForm($calculatorId)
    {
        if (!$calculatorId) {
            return '<div id="questions"></div><button type="button" id="add-question" class="btn btn-success">添加问题</button>';
        }

        $questions = MedicalQuestion::where('medical_calculator_id', $calculatorId)->with('options')->get();

        $html = '<div id="questions">';
        foreach ($questions as $index => $question) {
            $html .= $this->questionTemplate($index, $question);
        }
        $html .= '</div>';
        $html .= '<button type="button" id="add-question" class="btn btn-success">添加问题</button>';

        return $html;
    }

    /**
     * 生成单个问题的HTML模板
     *
     * @param int|string $index 问题索引
     * @param MedicalQuestion|null $question 问题对象
     * @return string 单个问题的HTML模板
     */
    protected function questionTemplate($index, $question = null)
    {
        $index = is_numeric($index) ? $index : "' + questionIndex + '";
        $html = '<div class="question" data-index="' . $index . '">';
        $html .= '<input type="hidden" name="questions[' . $index . '][id]" value="' . ($question ? htmlspecialchars($question->id) : '') . '">';

        $html .= '<div class="form-group">';
        $html .= '<label>问题内容：</label>';
        $html .= '<input type="text" name="questions[' . $index . '][question]" value="' . ($question ? htmlspecialchars($question->question) : '') . '" placeholder="请输入问题内容" class="form-control">';
        $html .= '</div>';

        $html .= '<div class="form-group">';
        $html .= '<label>变量名称：</label>';
        $html .= '<input type="text" name="questions[' . $index . '][variable_name]" value="' . ($question ? htmlspecialchars($question->variable_name) : '') . '" placeholder="请输入变量名称" class="form-control">';
        $html .= '</div>';

        $html .= '<div class="form-group">';
        $html .= '<label>问题类型：</label>';
        $html .= '<select name="questions[' . $index . '][type]" class="form-control question-type">';
        $html .= '<option value="text" ' . ($question && $question->type == 'text' ? 'selected' : '') . '>填空</option>';
        $html .= '<option value="radio" ' . ($question && $question->type == 'radio' ? 'selected' : '') . '>单选</option>';
        $html .= '<option value="checkbox" ' . ($question && $question->type == 'checkbox' ? 'selected' : '') . '>多选</option>';
        $html .= '</select>';
        $html .= '</div>';

        $html .= '<div class="form-group score-formula-group" ' . ($question && ($question->type == 'radio' || $question->type == 'checkbox') ? 'style="display:none;"' : '') . '>';
        $html .= '<label>分数：</label>';
        $html .= '<input type="text" name="questions[' . $index . '][score]" value="' . ($question ? $question->score : '') . '" placeholder="请输入分数" class="form-control score-formula">';
        $html .= '</div>';

        $html .= '<div class="options" ' . ($question && ($question->type == 'radio' || $question->type == 'checkbox') ? '' : 'style="display:none;"') . '>';
        if ($question && $question->options) {
            foreach ($question->options as $optionIndex => $option) {
                $html .= $this->optionTemplate($index, $optionIndex, $option);
            }
        }
        $html .= '</div>';

        $html .= '<button type="button" class="btn btn-info add-option" ' . ($question && ($question->type == 'radio' || $question->type == 'checkbox') ? '' : 'style="display:none;"') . '>添加选项</button>';
        $html .= '<button type="button" class="btn btn-danger remove-question">删除问题</button>';
        $html .= '</div>';
        return $html;
    }

    /**
     * 生成单个选项的HTML模板
     *
     * @param int|string $questionIndex 问题索引
     * @param int|string $optionIndex 选项索引
     * @param MedicalOption|null $option 选项对象
     * @return string 单个选项的HTML模板
     */
    protected function optionTemplate($questionIndex, $optionIndex, $option = null)
    {
        $questionIndex = is_numeric($questionIndex) ? $questionIndex : "' + questionIndex + '";
        $optionIndex = is_numeric($optionIndex) ? $optionIndex : "' + optionIndex + '";
        $html = '<div class="option">';
        $html .= '<input type="hidden" name="questions[' . $questionIndex . '][options][' . $optionIndex . '][id]" value="' . ($option ? $option->id : '') . '">';

        $html .= '<div class="form-group">';
        $html .= '<label>选项内容：</label>';
        $html .= '<input type="text" name="questions[' . $questionIndex . '][options][' . $optionIndex . '][content]" value="' . ($option ? $option->content : '') . '" placeholder="请输入选项内容" class="form-control">';
        $html .= '</div>';

        $html .= '<div class="form-group">';
        $html .= '<label>选项分数：</label>';
        $html .= '<input type="number" step="0.01" name="questions[' . $questionIndex . '][options][' . $optionIndex . '][score]" value="' . ($option ? $option->score : '') . '" placeholder="请输入选项分数" class="form-control">';
        $html .= '</div>';

        $html .= '<button type="button" class="btn btn-warning remove-option">删除选项</button>';
        $html .= '</div>';
        return $html;
    }

    /**
     * 生成问题和选项的JavaScript
     *
     * @return string JavaScript代码
     */
    protected function questionsScript()
    {
        $questionTemplate = json_encode($this->questionTemplate("' + questionIndex + '"));
        $optionTemplate = json_encode($this->optionTemplate("' + questionIndex + '", "' + optionIndex + '"));

        return <<<EOT
        $(document).ready(function() {
            let questionIndex = $('.question').length;

            // 移除所有现有的事件处理程序
            $(document).off('click', '#add-question');
            $(document).off('click', '.add-option');
            $(document).off('click', '.remove-question');
            $(document).off('click', '.remove-option');
            $(document).off('change', '.question-type');

            // 重新绑定事件处理程序
            $('#add-question').on('click', function() {
                let newQuestion = $($questionTemplate.replace(/' \+ questionIndex \+ '/g, questionIndex));
                $('#questions').append(newQuestion);
                questionIndex++;

                // 触发新添加问题的类型选择变化事件
                newQuestion.find('.question-type').trigger('change');
            });

            $(document).on('click', '.add-option', function() {
                let questionDiv = $(this).closest('.question');
                let questionIndex = questionDiv.data('index');
                let optionIndex = questionDiv.find('.option').length;
                let newOption = $($optionTemplate.replace(/' \+ questionIndex \+ '/g, questionIndex).replace(/' \+ optionIndex \+ '/g, optionIndex));
                questionDiv.find('.options').append(newOption);
            });

            $(document).on('click', '.remove-question', function() {
                $(this).closest('.question').remove();
            });

            $(document).on('click', '.remove-option', function() {
                $(this).closest('.option').remove();
            });

            $(document).on('change', '.question-type', function() {
                let questionDiv = $(this).closest('.question');
                let optionsDiv = questionDiv.find('.options');
                let scoreFormulaGroup = questionDiv.find('.score-formula-group');
                let addOptionButton = questionDiv.find('.add-option');
                if (this.value === 'text') {
                    optionsDiv.hide();
                    scoreFormulaGroup.show();
                    addOptionButton.hide();
                } else {
                    optionsDiv.show();
                    scoreFormulaGroup.hide();
                    addOptionButton.show();
                }
            });

            // 初始化时触发一次
            $('.question-type').trigger('change');
        });
    EOT;
    }

    /**
     * 获取所有计算器
     *
     * @return \Illuminate\Http\JsonResponse 所有计算器的JSON响应
     */
    public function getAllCalculators()
    {
        $calculators = MedicalCalculator::all();
        return response()->json($calculators);
    }

    /**
     * 获取指定计算器
     *
     * @param int $id 医学计算器ID
     * @return \Illuminate\Http\JsonResponse 计算器详情
     */
    public function show($id)
    {
        $calculator = MedicalCalculator::findOrFail($id);
        return response()->json($calculator);
    }

    /**
     * 更新指定计算器
     *
     * @param Request $request 请求对象
     * @param int $id 医学计算器ID
     * @return \Illuminate\Http\JsonResponse 更新后的计算器详情
     */
    public function update(Request $request, $id)
    {
        $calculator = MedicalCalculator::findOrFail($id);
        $calculator->update($request->all());
        $this->saveQuestions($calculator);

        admin_toastr('更新成功', 'success');
        return redirect()->route('admin.medical-calculators.index');
    }

    /**
     * 删除指定计算器（支持批量删除）
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse 删除结果
     */
    public function destroy($id)
    {
        $ids = is_array($id) ? $id : [$id];


        $successCount = 0;
        $failCount = 0;

        \Illuminate\Support\Facades\DB::transaction(function () use ($ids, &$successCount, &$failCount) {
            // 批量删除关联的问题和选项
            $deletedOptionsCount = MedicalOption::whereIn('medical_question_id', function($query) use ($ids) {
                $query->select('id')
                      ->from('medical_questions')
                      ->whereIn('medical_calculator_id', $ids);
            })->delete();

            $deletedQuestionsCount = MedicalQuestion::whereIn('medical_calculator_id', $ids)->delete();

            // 删除计算器
            $deletedCalculatorsCount = MedicalCalculator::whereIn('id', $ids)->delete();

            $successCount = $deletedCalculatorsCount;
            $failCount = count($ids) - $deletedCalculatorsCount;


        });

        $message = "成功删除 {$successCount} 个计算器";
        if ($failCount > 0) {
            $message .= "，{$failCount} 个计算器删除失败";
        }


        return response()->json(['message' => $message, 'status' => true]);
    }

    /**
     * 保存问题和选项
     *
     * @param Form|MedicalCalculator $formOrModel 表单对象或模型实例
     */
    protected function saveQuestions($formOrModel)
    {
        if ($formOrModel instanceof Form) {
            $formModelId = $formOrModel->model()->id;
        } elseif ($formOrModel instanceof MedicalCalculator) {
            $formModelId = $formOrModel->id;
        } else {
            throw new \InvalidArgumentException('Invalid argument type');
        }

        $questionsData = request()->input('questions');

        if (!is_array($questionsData)) {
            return; // 如果 $questionsData 不是数组，直接返回
        }

        foreach ($questionsData as $index => $questionData) {
            if (!isset($questionData['question']) || !isset($questionData['type'])) {
                continue;
            }

            try {
                $variableName = !empty($questionData['variable_name']) ? $questionData['variable_name'] : 'VAR_' . ($index + 1);

                $question = MedicalQuestion::updateOrCreate(
                    ['id' => $questionData['id'] ?? null],
                    [
                        'medical_calculator_id' => $formModelId,
                        'question' => $questionData['question'],
                        'variable_name' => $variableName,
                        'type' => $questionData['type'],
                        'score' => isset($questionData['score']) ? (float)$questionData['score'] : null,
                    ]
                );

                // 删除旧的选项
                $question->options()->delete();

                if (isset($questionData['options']) && is_array($questionData['options'])) {
                    foreach ($questionData['options'] as $optionData) {
                        if (!isset($optionData['content'])) {
                            continue;
                        }

                        $option = new MedicalOption([
                            'content' => $optionData['content'],
                            'score' => isset($optionData['score']) ? (float)$optionData['score'] : 0,
                        ]);
                        $question->options()->save($option);
                    }
                }
            } catch (\Exception $e) {
                \Illuminate\Support\Facades\Log::error('Error saving question: ' . $e->getMessage());
            }
        }
    }

    /**
     * 定义医学计算器的表格
     *
     * @return \Encore\Admin\Grid 表格对象
     */
    protected function grid()
    {
        return Admin::grid(MedicalCalculator::class, function (Grid $grid) {
            $grid->name('计算器名称');
            $grid->disease_name('疾病名称');
            $grid->column('questions_count', '问题数量');

            $grid->paginate(20);
            $grid->disableExport();
            $grid->actions(function ($actions) {
                $actions->disableView();
            });
            $grid->filter(function ($filter) {
                $filter->disableIdFilter();
                $filter->like('name', '输入名称搜索');
            });

            // 启用批量删除
            $grid->batchActions(function ($batch) {
                $batch->disableDelete();
                $batch->add(new BatchDeleteAction());
            });
        });
    }
}