<?php

namespace App\Http\Controllers\API\Admin;

use App\Http\Controllers\Controller;
use App\Services\PrintTemplateService;
use App\Lib\Rs;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;

class PrintTemplateController extends Controller
{
    private PrintTemplateService $printTemplateService;

    public function __construct(PrintTemplateService $printTemplateService)
    {
        $this->printTemplateService = $printTemplateService;
    }

    /**
     * 获取模板列表
     */
    public function index(Request $request)
    {
        $templateType = $request->input('template_type');
        $list = $this->printTemplateService->getTemplateList($templateType);

        return Rs::success($list);
    }

    /**
     * 获取默认模板
     */
    public function getDefault(Request $request)
    {
        $templateType = $request->input('template_type', 'exam_application');
        $template = $this->printTemplateService->getDefaultTemplate($templateType);

        if (!$template) {
            return Rs::error('未找到默认模板');
        }

        return Rs::success($template);
    }

    /**
     * 获取单个模板（根据ID）
     */
    public function show(Request $request)
    {
        $id = $request->input('id');
        $templateCode = $request->input('template_code');

        $template = null;
        if ($id) {
            $template = $this->printTemplateService->getTemplateById($id);
        } elseif ($templateCode) {
            $template = $this->printTemplateService->getTemplate($templateCode);
        }

        if (!$template) {
            return Rs::error('模板不存在');
        }

        return Rs::success($template);
    }

    /**
     * 创建模板
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'template_code' => 'required|string|max:50|unique:print_templates,template_code',
            'template_name' => 'required|string|max:100',
            'template_type' => 'required|string|max:30',
            'html_template' => 'required|string',
            'css_style' => 'nullable|string',
            'page_settings' => 'nullable|array',
            'example_json' => 'nullable|string',
            'is_default' => 'nullable|boolean',
        ]);

        // 如果设为默认，取消其他默认模板
        if (!empty($validated['is_default'])) {
            DB::table('print_templates')
                ->where('template_type', $validated['template_type'])
                ->update(['is_default' => false]);
        }

        $templateId = $this->printTemplateService->saveTemplate($validated);

        return Rs::success(['id' => $templateId], '模板创建成功');
    }

    /**
     * 更新模板
     */
    public function update(Request $request)
    {
        $validated = $request->validate([
            'id' => 'required|integer',
            'template_code' => 'required|string|max:50',
            'template_name' => 'required|string|max:100',
            'template_type' => 'required|string|max:30',
            'html_template' => 'required|string',
            'css_style' => 'nullable|string',
            'page_settings' => 'nullable|array',
            'example_json' => 'nullable|string',
            'is_default' => 'nullable|boolean',
        ]);

        // 如果设为默认，取消其他默认模板
        if (!empty($validated['is_default'])) {
            DB::table('print_templates')
                ->where('template_type', $validated['template_type'])
                ->where('id', '!=', $validated['id'])
                ->update(['is_default' => false]);
        }

        $this->printTemplateService->saveTemplate($validated);

        return Rs::success([], '模板更新成功');
    }

    /**
     * 设为默认模板
     */
    public function setDefault(Request $request)
    {
        $id = $request->input('id');

        $template = DB::table('print_templates')->where('id', $id)->first();
        if (!$template) {
            return Rs::error('模板不存在');
        }

        // 取消其他同类型模板的默认状态
        DB::table('print_templates')
            ->where('template_type', $template->template_type)
            ->where('id', '!=', $id)
            ->update(['is_default' => false]);

        // 设为默认
        DB::table('print_templates')->where('id', $id)->update(['is_default' => true]);

        return Rs::success([], '已设为默认模板');
    }

    /**
     * 删除模板（软删除）
     */
    public function destroy(Request $request)
    {
        $id = $request->input('id');

        DB::table('print_templates')->where('id', $id)->update(['status' => false]);

        return Rs::success([], '模板已删除');
    }

    /**
     * 验证模板语法
     */
    public function validate(Request $request)
    {
        $htmlTemplate = $request->input('html_template');

        $result = $this->printTemplateService->validateTemplate($htmlTemplate);

        if ($result['valid']) {
            return Rs::success([], '模板语法正确');
        }

        return Rs::error($result['message'] ?? '模板语法错误');
    }

    /**
     * 渲染 HTML（预览）
     */
    public function render(Request $request)
    {
        $templateCode = $request->input('template_code');
        $templateType = $request->input('template_type');
        $data = $request->input('data', []);

        // 如果传入 template_type，使用默认模板
        if ($templateType && !$templateCode) {
            $defaultTemplate = $this->printTemplateService->getDefaultTemplate($templateType);
            if (!$defaultTemplate) {
                return Rs::error('未找到默认模板');
            }
            $templateCode = $defaultTemplate->template_code;
        }

        if (!$templateCode) {
            return Rs::error('请指定 template_code 或 template_type');
        }

        try {
            $html = $this->printTemplateService->renderTemplate($templateCode, $data);
            return response($html)->header('Content-Type', 'text/html; charset=utf-8');
        } catch (\Exception $e) {
            $message = mb_convert_encoding($e->getMessage(), 'UTF-8', 'UTF-8,GBK,GB2312');
            return Rs::error($message);
        }
    }

    /**
     * 生成 PDF
     */
    public function pdf(Request $request)
    {
        $templateCode = $request->input('template_code');
        $data = $request->input('data', []);
        $download = $request->input('download', false);
        $filename = $request->input('filename', 'document.pdf');

        try {
            $pdf = $this->printTemplateService->generatePDF($templateCode, $data);

            if ($download) {
                return $pdf->download($filename);
            }

            return $pdf->inline($filename);
        } catch (\Exception $e) {
            // 确保错误消息是有效的 UTF-8
            $message = mb_convert_encoding($e->getMessage(), 'UTF-8', 'UTF-8,GBK,GB2312');
            return response()->json([
                'success' => false,
                'message' => $message,
                'code' => 500,
                'data' => []
            ], 500)->setEncodingOptions(JSON_UNESCAPED_UNICODE);
        }
    }

    /**
     * 打印检查申请单（业务数据接口 - 准备数据）
     */
    public function getExamApplicationData(Request $request)
    {
        try {
            $applicationIds = $request->input('application_ids');

            // 获取检查申请单数据（只需要申请单信息，不需要所有预约记录）
            $applications = DB::table('exam_application as ea')
                ->whereIn('ea.id', $applicationIds)
                ->select([
                    'ea.id',
                    'ea.examination_item_name',
                    'ea.examination_department_name',
                    'ea.payment_status',
                    'ea.status',
                    'ea.apply_time',
                    'ea.patient_name',
                    'ea.patient_gender',
                    'ea.patient_age',
                    'ea.patient_phone',
                    'ea.patient_type',
                    'ea.inpatient_id',
                    'ea.outpatient_id',
                    'ea.ward_name',
                    'ea.bed_name'
                ])
                ->get();

            if ($applications->isEmpty()) {
                return Rs::error('未找到检查申请单');
            }

            // 获取第一个申请单信息
            $firstApp = $applications[0];

            // 获取该申请单最新的一条预约记录（如果有）
            $latestAppointment = DB::table('exam_appointment as a')
                ->leftJoin('department_resource as dr', 'a.department_resource_id', '=', 'dr.id')
                ->where('a.exam_application_id', $firstApp->id)
                ->orderBy('a.created_at', 'desc')
                ->select(['a.appointment_time', 'dr.cancel_reason_required'])
                ->first();

            // 计算星期
            $weekdayLabel = '';
            if (!empty($latestAppointment->appointment_time)) {
                $weekDays = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];
                $weekdayLabel = $weekDays[date('w', strtotime($latestAppointment->appointment_time))];
            }

            // 患者类型名称
            $patientTypeName = '';
            switch ($firstApp->patient_type) {
                case 1:
                    $patientTypeName = '门诊患者';
                    break;
                case 2:
                    $patientTypeName = '住院患者';
                    break;
                case 3:
                    $patientTypeName = '急诊患者';
                    break;
                case 4:
                    $patientTypeName = '体检患者';
                    break;
                default:
                    $patientTypeName = '未知';
            }

            // 准备模板数据
            $data = [
                'hospital_name' => '演示医院',
                'barcode' => $firstApp->id,

                // 患者信息（直接从 exam_application 表获取）
                'patient_name' => $firstApp->patient_name ?? '',
                'patient_gender' => $firstApp->patient_gender == 1 ? '男' : ($firstApp->patient_gender == 2 ? '女' : '未知'),
                'patient_age' => $firstApp->patient_age ?? '',
                'patient_type' => $firstApp->patient_type ?? 1,
                'patient_type_name' => $patientTypeName,

                // 住院/门诊号
                'inpatient_id' => $firstApp->inpatient_id ?? '',
                'outpatient_id' => $firstApp->outpatient_id ?? '',

                // 病区/床号
                'ward_name' => $firstApp->ward_name ?? '',
                'bed_code' => $firstApp->bed_name ?? '',

                // 联系方式
                'patient_phone' => $firstApp->patient_phone ?? '',

                // 检查项目
                'examination_item_name' => $applications->pluck('examination_item_name')->implode('、'),
                'examination_department_name' => $firstApp->examination_department_name ?? '',

                // 预约信息（从最新预约记录获取）
                'appointment_time' => $latestAppointment && $latestAppointment->appointment_time ? date('Y-m-d H:i', strtotime($latestAppointment->appointment_time)) : '',
                'weekday_label' => $weekdayLabel,
                'department_name' => $firstApp->examination_department_name ?? '',
                'cancel_reason_required' => $latestAppointment->cancel_reason_required ?? 0,

                // 申请时间
                'entrust_date' => date('Y-m-d'),
                'entrust_time' => date('H:i:s'),
            ];

            return Rs::success($data);
        } catch (\Exception $e) {
            $message = mb_convert_encoding($e->getMessage(), 'UTF-8', 'UTF-8,GBK,GB2312');
            return Rs::error($message);
        }
    }

    /**
     * 打印检查申请单（示例业务方法，返回 PDF）
     */
    public function printExamApplication(Request $request)
    {
        try {
            $applicationIds = $request->input('application_ids');
            $templateCode = $request->input('template_code');
            $orderNo = $request->input('order_no', time());

            // 获取检查申请单数据
            $applications = DB::table('exam_application')
                ->whereIn('id', $applicationIds)
                ->get();

            if ($applications->isEmpty()) {
                return Rs::error('未找到检查申请单');
            }

            // 准备模板数据
            $data = [
                'hospital_name' => '某某医院',
                'patient_name' => $applications[0]->patient_name ?? '',
                'patient_id' => $applications[0]->patient_id ?? '',
                'age' => $applications[0]->age ?? '',
                'gender_text' => $applications[0]->gender == 1 ? '男' : ($applications[0]->gender == 2 ? '女' : '未知'),
                'phone' => $applications[0]->phone ?? '',
                'items' => $applications->map(function($app, $index) {
                    return [
                        'index' => $index + 1,
                        'item_name' => $app->item_name,
                        'item_code' => $app->item_code ?? '',
                        'remark' => $app->remark ?: '无',
                    ];
                })->toArray(),
                'print_time' => now()->format('Y-m-d H:i:s'),
                'operator' => '管理员',
                'order_no' => $orderNo,
            ];

            // 如果没有指定模板，使用默认模板
            if (!$templateCode) {
                $defaultTemplate = $this->printTemplateService->getDefaultTemplate('exam_application');
                $templateCode = $defaultTemplate->template_code ?? 'exam_application_v1';
            }

            // 使用 LightnCandy 渲染模板
            $html = $this->printTemplateService->renderTemplate($templateCode, $data);

            // 使用 SnappyPdf 生成 PDF
            $fileName = date('Ymd') . '/' . $orderNo . '.pdf';
            $filePath = storage_path('app/public/CheckPdf/' . $fileName);

            // 确保目录存在
            $directory = dirname($filePath);
            if (!file_exists($directory)) {
                mkdir($directory, 0755, true);
            }

            // 生成 PDF
            $this->printTemplateService->generatePDF($templateCode, $data, $filePath);

            // 返回文件 URL
            $fileUrl = Storage::url('CheckPdf/' . $fileName);

            return Rs::success([
                'file_url' => $fileUrl,
                'file_path' => $filePath,
                'order_no' => $orderNo
            ]);
        } catch (\Exception $e) {
            $message = mb_convert_encoding($e->getMessage(), 'UTF-8', 'UTF-8,GBK,GB2312');
            return Rs::error($message);
        }
    }
}