<?php
// +----------------------------------------------------------------------
// | Niucloud-admin 企业快速开发的多应用管理平台
// +----------------------------------------------------------------------
// | 官方网址：https://www.niucloud.com
// +----------------------------------------------------------------------
// | niucloud团队 版权所有 开源版本可自由商用
// +----------------------------------------------------------------------
// | Author: Niucloud Team
// +----------------------------------------------------------------------

namespace app\service\api\apiService;

use app\model\contract\Contract;
use app\model\contract_sign\ContractSign;
use core\base\BaseApiService;
use think\facade\Db;
use PhpOffice\PhpWord\TemplateProcessor;
use app\service\core\contract_sign\ContractSign as ContractSignService;

/**
 * 合同服务层
 * Class ContractService
 * @package app\service\api\apiService
 */
class ContractService extends BaseApiService
{
    /**
     * 获取我的合同列表
     * @param array $where
     * @return array
     */
    public function getMyContracts(array $where)
    {
        $res = [
            'code' => 0,
            'msg' => '获取合同列表失败',
            'data' => []
        ];

        try {
            $page = $where['page'] ?? 1;
            $limit = $where['limit'] ?? 10;
            $personnel_id = $where['personnel_id'] ?? 0;

            if (empty($personnel_id)) {
                $res['msg'] = '员工ID不能为空';
                return $res;
            }

            // 查询合同签订记录，关联合同表
            $contractSignModel = new ContractSign();
            $list = $contractSignModel->alias('cs')
                ->join('school_contract c', 'cs.contract_id = c.id')
                ->where('cs.personnel_id', $personnel_id)
                ->where('cs.deleted_at', 0)
                ->where('c.deleted_at', 0)
                ->field([
                    'cs.id',
                    'cs.contract_id',
                    'cs.personnel_id',
                    'cs.sign_file',
                    'cs.status',
                    'cs.created_at',
                    'cs.sign_time',
                    'c.contract_name',
                    'c.contract_template',
                    'c.contract_status',
                    'c.contract_type',
                    'c.remarks'
                ])
                ->order('cs.created_at', 'desc')
                ->paginate([
                    'list_rows' => $limit,
                    'page' => $page
                ])
                ->toArray();

            $res = [
                'code' => 1,
                'msg' => '获取成功',
                'data' => $list
            ];

        } catch (\Exception $e) {
            $res['msg'] = '获取合同列表异常：' . $e->getMessage();
        }

        return $res;
    }

    /**
     * 获取合同详情
     * @param array $where
     * @return array
     */
    public function getContractDetail(array $where)
    {
        $res = [
            'code' => 0,
            'msg' => '获取合同详情失败',
            'data' => []
        ];

        try {
            $id = $where['id'] ?? 0;

            if (empty($id)) {
                $res['msg'] = '参数错误';
                return $res;
            }

            // 查询合同签订记录，关联合同表
            $contractSign = ContractSign::alias('cs')
                ->join('school_contract c', 'cs.contract_id = c.id')
                ->where('cs.id', $id)
                ->where('cs.deleted_at', 0)
                ->where('c.deleted_at', 0)
                ->field([
                    'cs.id',
                    'cs.contract_id',
                    'cs.personnel_id',
                    'cs.sign_file',
                    'cs.status',
                    'cs.created_at',
                    'cs.sign_time',
                    'cs.updated_at',
                    'c.contract_name',
                    'c.contract_template',
                    'c.contract_status',
                    'c.contract_type',
                    'c.remarks'
                ])
                ->find();

            if (empty($contractSign)) {
                $res['msg'] = '合同不存在或无权限访问';
                return $res;
            }

            $contractData = $contractSign->toArray();

            $res = [
                'code' => 1,
                'msg' => '获取成功',
                'data' => $contractData
            ];

        } catch (\Exception $e) {
            $res['msg'] = '获取合同详情异常：' . $e->getMessage();
        }

        return $res;
    }

    /**
     * 签订合同
     * @param array $data
     * @return array
     */
    public function signContract(array $data)
    {
        $res = [
            'code' => 0,
            'msg' => '签订合同失败',
            'data' => []
        ];

        try {
            $contract_id = $data['contract_id'] ?? 0;
            $personnel_id = $data['personnel_id'] ?? 0;
            $sign_file = $data['sign_file'] ?? '';

            if (empty($contract_id) || empty($personnel_id) || empty($sign_file)) {
                $res['msg'] = '参数错误';
                return $res;
            }

            // 开启事务
            Db::startTrans();

            // 查询合同签订记录
            $contractSign = ContractSign::where('contract_id', $contract_id)
                ->where('personnel_id', $personnel_id)
                ->where('deleted_at', 0)
                ->find();

            if (empty($contractSign)) {
                Db::rollback();
                $res['msg'] = '合同签订记录不存在';
                return $res;
            }

            // 检查合同状态
            if ($contractSign['status'] != 1) {
                Db::rollback();
                $res['msg'] = '合同状态不允许签订';
                return $res;
            }

            // 检查是否已经签订
            if (!empty($contractSign['sign_file'])) {
                Db::rollback();
                $res['msg'] = '合同已经签订，无需重复签订';
                return $res;
            }

            // 生成签署后的合同文档
            $generatedFile = null;
            if ($sign_file) {
                $generatedFile = $this->generateStaffSignedContract($contract_id, $personnel_id, $sign_file);
            }

            // 更新签订信息
            $updateData = [
                'sign_file' => $generatedFile ?: $sign_file,
                'sign_time' => date('Y-m-d H:i:s'),
                'updated_at' => date('Y-m-d H:i:s')
            ];

            if ($generatedFile) {
                $updateData['signature_image'] = $sign_file;
            }

            $updateResult = ContractSign::where('id', $contractSign['id'])->update($updateData);

            if (!$updateResult) {
                Db::rollback();
                $res['msg'] = '更新签订信息失败';
                return $res;
            }

            // 提交事务
            Db::commit();

            $res = [
                'code' => 1,
                'msg' => '签订成功',
                'data' => [
                    'contract_id' => $contract_id,
                    'sign_time' => $updateData['sign_time'],
                    'generated_file' => $generatedFile
                ]
            ];

        } catch (\Exception $e) {
            Db::rollback();
            $res['msg'] = '签订合同异常：' . $e->getMessage();
        }

        return $res;
    }

    /**
     * 获取合同签订状态
     * @param array $where
     * @return array
     */
    public function getSignStatus(array $where)
    {
        $res = [
            'code' => 0,
            'msg' => '获取签订状态失败',
            'data' => []
        ];

        try {
            $contract_id = $where['contract_id'] ?? 0;
            $personnel_id = $where['personnel_id'] ?? 0;

            if (empty($contract_id) || empty($personnel_id)) {
                $res['msg'] = '参数错误';
                return $res;
            }

            $contractSign = ContractSign::where('contract_id', $contract_id)
                ->where('personnel_id', $personnel_id)
                ->where('deleted_at', 0)
                ->field('id,sign_file,status,sign_time')
                ->find();

            if (empty($contractSign)) {
                $res['msg'] = '合同签订记录不存在';
                return $res;
            }

            $signData = $contractSign->toArray();
            
            // 判断签订状态
            $signData['is_signed'] = !empty($signData['sign_file']);
            $signData['can_sign'] = $signData['status'] == 1 && empty($signData['sign_file']);

            $res = [
                'code' => 1,
                'msg' => '获取成功',
                'data' => $signData
            ];

        } catch (\Exception $e) {
            $res['msg'] = '获取签订状态异常：' . $e->getMessage();
        }

        return $res;
    }

    /**
     * 下载合同文件
     * @param array $where
     * @return array
     */
    public function downloadContract(array $where)
    {
        $res = [
            'code' => 0,
            'msg' => '下载合同失败',
            'data' => []
        ];

        try {
            $contract_id = $where['contract_id'] ?? 0;
            $personnel_id = $where['personnel_id'] ?? 0;

            if (empty($contract_id) || empty($personnel_id)) {
                $res['msg'] = '参数错误';
                return $res;
            }

            // 查询合同信息
            $contractSign = ContractSign::alias('cs')
                ->join('school_contract c', 'cs.contract_id = c.id')
                ->where('cs.contract_id', $contract_id)
                ->where('cs.personnel_id', $personnel_id)
                ->where('cs.deleted_at', 0)
                ->where('c.deleted_at', 0)
                ->field([
                    'cs.sign_file',
                    'c.contract_template',
                    'c.contract_name'
                ])
                ->find();

            if (empty($contractSign)) {
                $res['msg'] = '合同不存在或无权限访问';
                return $res;
            }

            $contractData = $contractSign->toArray();

            // 返回下载信息
            $downloadData = [
                'contract_name' => $contractData['contract_name'],
                'sign_file' => $contractData['sign_file'],
                'contract_template' => $contractData['contract_template'],
                'download_url' => !empty($contractData['sign_file']) ? $contractData['sign_file'] : $contractData['contract_template']
            ];

            $res = [
                'code' => 1,
                'msg' => '获取下载信息成功',
                'data' => $downloadData
            ];

        } catch (\Exception $e) {
            $res['msg'] = '获取下载信息异常：' . $e->getMessage();
        }

        return $res;
    }

    /**
     * 生成员工签署后的合同文档
     * @param int $contractId
     * @param int $personnelId
     * @param string $signatureImage
     * @return string|null
     */
    private function generateStaffSignedContract($contractId, $personnelId, $signatureImage)
    {
        try {
            // 获取合同模板信息
            $contract = Contract::find($contractId);
            if (!$contract || !$contract['contract_template']) {
                return null;
            }

            // 构建模板路径
            $templatePath = public_path() . '/upload/' . $contract['contract_template'];
            if (!file_exists($templatePath)) {
                return null;
            }

            // 生成输出文件名和路径
            $outputFileName = 'staff_signed_contract_' . $personnelId . '_' . $contractId . '_' . date('YmdHis') . '.docx';
            $outputRelPath = 'contracts/staff_signed/' . date('Y/m/') . $outputFileName;
            $outputFullPath = public_path() . '/upload/' . $outputRelPath;

            // 确保目录存在
            $outputDir = dirname($outputFullPath);
            if (!is_dir($outputDir)) {
                mkdir($outputDir, 0755, true);
            }

            // 获取员工信息并准备填充数据
            $fillData = $this->prepareStaffFillData($contractId, $personnelId);

            // 使用PhpWord处理模板
            $templateProcessor = new TemplateProcessor($templatePath);

            // 填充文本数据
            foreach ($fillData as $placeholder => $value) {
                $templateProcessor->setValue($placeholder, $value);
            }

            // 处理签名图片
            if ($signatureImage) {
                // 处理签名图片
                $signImagePath = $this->processStaffSignatureImage($signatureImage);
                
                // 使用ContractSign服务插入签名
                $contractSignService = new ContractSignService();
                $contractSignService->setSign($templatePath, $outputFullPath, $signImagePath, '员工签名');
                
                // 清理临时文件
                if (file_exists($signImagePath)) {
                    unlink($signImagePath);
                }
            } else {
                // 没有签名时直接保存
                $templateProcessor->saveAs($outputFullPath);
            }

            return $outputRelPath;

        } catch (\Exception $e) {
            return null;
        }
    }

    /**
     * 准备员工填充数据
     * @param int $contractId
     * @param int $personnelId
     * @return array
     */
    private function prepareStaffFillData($contractId, $personnelId)
    {
        $fillData = [];

        try {
            // 获取员工信息
            $personnel = Db::table('school_personnel')->where('id', $personnelId)->find();
            if ($personnel) {
                $fillData['员工姓名'] = $personnel['name'] ?? '';
                $fillData['员工编号'] = $personnel['employee_number'] ?? '';
                $fillData['员工电话'] = $personnel['phone'] ?? '';
                $fillData['员工邮箱'] = $personnel['email'] ?? '';
                $fillData['入职时间'] = $personnel['join_time'] ?? '';
            }

            // 添加系统信息
            $fillData['签署日期'] = date('Y-m-d');
            $fillData['签署时间'] = date('Y-m-d H:i:s');
            $fillData['合同编号'] = $contractId . date('Ymd') . $personnelId;

        } catch (\Exception $e) {
            // 记录错误日志但不中断流程
        }

        return $fillData;
    }

    /**
     * 处理员工签名图片
     * @param string $signatureImage
     * @return string
     */
    private function processStaffSignatureImage($signatureImage)
    {
        $tempImagePath = public_path() . '/upload/temp_staff_sign_' . date('YmdHis') . '_' . mt_rand(1000, 9999) . '.png';

        if (strpos($signatureImage, 'data:image') === 0) {
            // Base64图片
            $imageData = base64_decode(preg_replace('#^data:image/\w+;base64,#i', '', $signatureImage));
            if ($imageData !== false) {
                file_put_contents($tempImagePath, $imageData);
            }
        } elseif (filter_var($signatureImage, FILTER_VALIDATE_URL)) {
            // URL图片
            $imageContent = file_get_contents($signatureImage);
            if ($imageContent !== false) {
                file_put_contents($tempImagePath, $imageContent);
            }
        } else {
            // 本地路径
            $localPath = public_path() . '/upload/' . ltrim($signatureImage, '/');
            if (file_exists($localPath)) {
                copy($localPath, $tempImagePath);
            }
        }

        return $tempImagePath;
    }
}