package org.dromara.crm.service.impl;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.StrUtil;
import lombok.extern.slf4j.Slf4j;
import org.dromara.common.core.exception.ServiceException;
import org.dromara.crm.domain.vo.CrmQuoteProductVo;
import org.dromara.crm.domain.vo.CrmQuoteVo;
import org.dromara.crm.service.ICrmQuotePdfService;
import org.dromara.crm.service.ICrmQuoteService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;

import java.io.File;
import java.io.FileWriter;
import java.math.BigDecimal;
import java.nio.charset.StandardCharsets;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.List;

/**
 * 报价单PDF生成Service实现
 *
 * 说明: 当前采用HTML模板方式生成,可打印为PDF
 * 后续可集成专业PDF库(如iText、Apache PDFBox等)
 *
 * @author 系统管理员
 * @date 2025-10-05
 */
@Slf4j
@Service
public class CrmQuotePdfServiceImpl implements ICrmQuotePdfService {

    private final ICrmQuoteService quoteService;

    /**
     * 构造函数 - 使用@Lazy注解打破循环依赖
     * CrmQuoteServiceImpl依赖ICrmQuotePdfService
     * CrmQuotePdfServiceImpl依赖ICrmQuoteService
     * 通过延迟加载ICrmQuoteService来解决循环依赖
     */
    public CrmQuotePdfServiceImpl(@Lazy ICrmQuoteService quoteService) {
        this.quoteService = quoteService;
    }

    @Value("${ruoyi.profile:/Users/wuzilong/work/00code/shanxia/backend/ruoyi-admin/uploadPath}")
    private String uploadPath;

    @Override
    public String generateQuotePdf(Long quoteId) {
        // 1. 查询报价单信息
        CrmQuoteVo quote = quoteService.queryById(quoteId);
        if (quote == null) {
            throw new ServiceException("报价单不存在");
        }

        // 2. 生成HTML内容
        String htmlContent = buildQuoteHtml(quote);

        // 3. 保存HTML文件(可打印为PDF)
        // 将报价单编号中的特殊字符替换为横线，避免文件路径错误
        String safeQuoteNo = quote.getQuoteNo().replaceAll("[/\\\\:*?\"<>|]", "-");
        String fileName = "报价单-" + safeQuoteNo + ".pdf";
        String dateStr = LocalDate.now().format(java.time.format.DateTimeFormatter.ofPattern("yyyyMMdd"));
        String relativePath = "/quote/" + dateStr + "/";
        String fullPath = uploadPath + relativePath;

        // 确保目录存在
        FileUtil.mkdir(fullPath);

        // 保存文件
        String filePath = fullPath + fileName;
        try (FileWriter writer = new FileWriter(filePath, StandardCharsets.UTF_8)) {
            writer.write(htmlContent);
            log.info("生成报价单HTML文件成功: quoteId={}, filePath={}", quoteId, filePath);
        } catch (Exception e) {
            log.error("生成报价单HTML文件失败: quoteId={}", quoteId, e);
            throw new ServiceException("生成PDF文件失败: " + e.getMessage());
        }

        // 4. 返回相对路径(供前端访问)
        String pdfUrl = relativePath + fileName;
        log.info("生成报价单PDF成功: quoteId={}, pdfUrl={}", quoteId, pdfUrl);

        return pdfUrl;
    }

    @Override
    public Boolean deleteQuotePdf(Long quoteId) {
        CrmQuoteVo quote = quoteService.queryById(quoteId);
        if (quote == null || StrUtil.isBlank(quote.getPdfUrl())) {
            return true;
        }

        String filePath = uploadPath + quote.getPdfUrl();
        File file = new File(filePath);
        if (file.exists()) {
            boolean deleted = FileUtil.del(file);
            log.info("删除报价单PDF: quoteId={}, filePath={}, success={}", quoteId, filePath, deleted);
            return deleted;
        }

        return true;
    }

    /**
     * 构建报价单HTML内容
     */
    private String buildQuoteHtml(CrmQuoteVo quote) {
        StringBuilder html = new StringBuilder();

        html.append("<!DOCTYPE html>\n");
        html.append("<html lang=\"zh-CN\">\n");
        html.append("<head>\n");
        html.append("    <meta charset=\"UTF-8\">\n");
        html.append("    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n");
        html.append("    <title>报价单 - ").append(quote.getQuoteNo()).append("</title>\n");
        html.append("    <style>\n");
        html.append(getPdfStyles());
        html.append("    </style>\n");
        html.append("</head>\n");
        html.append("<body>\n");

        // 页眉
        html.append("    <div class=\"header\">\n");
        html.append("        <h1>产品报价单</h1>\n");
        html.append("        <div class=\"company-name\">杭州第一技师学院智慧校园管理系统</div>\n");
        html.append("    </div>\n");

        // 报价单信息
        html.append("    <div class=\"quote-info\">\n");
        html.append("        <table class=\"info-table\">\n");
        html.append("            <tr>\n");
        html.append("                <td><strong>报价单号:</strong></td>\n");
        html.append("                <td>").append(quote.getQuoteNo()).append("</td>\n");
        html.append("                <td><strong>版本号:</strong></td>\n");
        html.append("                <td>").append(quote.getVersion()).append("</td>\n");
        html.append("            </tr>\n");
        html.append("            <tr>\n");
        html.append("                <td><strong>报价日期:</strong></td>\n");
        html.append("                <td>").append(formatDate(quote.getQuoteDate())).append("</td>\n");
        html.append("                <td><strong>有效期至:</strong></td>\n");
        html.append("                <td>").append(formatDate(quote.getExpireDate())).append("</td>\n");
        html.append("            </tr>\n");
        html.append("        </table>\n");
        html.append("    </div>\n");

        // 客户信息
        html.append("    <div class=\"customer-info\">\n");
        html.append("        <h3>客户信息</h3>\n");
        html.append("        <table class=\"info-table\">\n");
        html.append("            <tr>\n");
        html.append("                <td><strong>客户名称:</strong></td>\n");
        html.append("                <td colspan=\"3\">").append(quote.getCustomerName()).append("</td>\n");
        html.append("            </tr>\n");
        html.append("            <tr>\n");
        html.append("                <td><strong>联系人:</strong></td>\n");
        html.append("                <td>").append(defaultValue(quote.getContactName())).append("</td>\n");
        html.append("                <td><strong>联系电话:</strong></td>\n");
        html.append("                <td>").append(defaultValue(quote.getContactMobile())).append("</td>\n");
        html.append("            </tr>\n");
        html.append("            <tr>\n");
        html.append("                <td><strong>电子邮箱:</strong></td>\n");
        html.append("                <td colspan=\"3\">").append(defaultValue(quote.getContactEmail()))
                .append("</td>\n");
        html.append("            </tr>\n");
        html.append("        </table>\n");
        html.append("    </div>\n");

        // 产品明细
        html.append("    <div class=\"products\">\n");
        html.append("        <h3>产品明细</h3>\n");
        html.append("        <table class=\"product-table\">\n");
        html.append("            <thead>\n");
        html.append("                <tr>\n");
        html.append("                    <th width=\"50\">序号</th>\n");
        html.append("                    <th>产品名称</th>\n");
        html.append("                    <th width=\"100\">规格型号</th>\n");
        html.append("                    <th width=\"60\">单位</th>\n");
        html.append("                    <th width=\"80\">数量</th>\n");
        html.append("                    <th width=\"100\">单价(元)</th>\n");
        html.append("                    <th width=\"80\">折扣</th>\n");
        html.append("                    <th width=\"120\">小计(元)</th>\n");
        html.append("                </tr>\n");
        html.append("            </thead>\n");
        html.append("            <tbody>\n");

        List<CrmQuoteProductVo> products = quote.getProductList();
        if (products != null && !products.isEmpty()) {
            int index = 1;
            for (CrmQuoteProductVo product : products) {
                html.append("                <tr>\n");
                html.append("                    <td class=\"center\">").append(index++).append("</td>\n");
                html.append("                    <td>").append(product.getProductName()).append("</td>\n");
                html.append("                    <td class=\"center\">").append(defaultValue(product.getModel()))
                        .append("</td>\n");
                html.append("                    <td class=\"center\">").append(product.getUnit()).append("</td>\n");
                html.append("                    <td class=\"right\">").append(product.getQuantity()).append("</td>\n");
                html.append("                    <td class=\"right\">").append(formatMoney(product.getPrice()))
                        .append("</td>\n");
                html.append("                    <td class=\"center\">").append(formatDiscount(product.getDiscount()))
                        .append("</td>\n");
                html.append("                    <td class=\"right\">").append(formatMoney(product.getSubtotal()))
                        .append("</td>\n");
                html.append("                </tr>\n");
            }
        }

        html.append("            </tbody>\n");
        html.append("        </table>\n");
        html.append("    </div>\n");

        // 价格汇总
        html.append("    <div class=\"price-summary\">\n");
        html.append("        <table class=\"summary-table\">\n");
        html.append("            <tr>\n");
        html.append("                <td class=\"label\">产品总价:</td>\n");
        html.append("                <td class=\"value\">¥ ").append(formatMoney(quote.getTotalAmount()))
                .append("</td>\n");
        html.append("            </tr>\n");

        if (quote.getDiscountRate() != null && quote.getDiscountRate().compareTo(BigDecimal.ZERO) > 0) {
            html.append("            <tr>\n");
            html.append("                <td class=\"label\">整单折扣(").append(quote.getDiscountRate())
                    .append("%):</td>\n");
            html.append("                <td class=\"value\">- ¥ ").append(formatMoney(quote.getDiscountAmount()))
                    .append("</td>\n");
            html.append("            </tr>\n");
        }

        html.append("            <tr class=\"total\">\n");
        html.append("                <td class=\"label\"><strong>最终金额:</strong></td>\n");
        html.append("                <td class=\"value\"><strong>¥ ").append(formatMoney(quote.getFinalAmount()))
                .append("</strong></td>\n");
        html.append("            </tr>\n");
        html.append("        </table>\n");
        html.append("    </div>\n");

        // 条款说明
        html.append("    <div class=\"terms\">\n");

        if (StrUtil.isNotBlank(quote.getPaymentTerms())) {
            html.append("        <h3>付款条款</h3>\n");
            html.append("        <p>").append(quote.getPaymentTerms()).append("</p>\n");
        }

        if (StrUtil.isNotBlank(quote.getDeliveryTerms())) {
            html.append("        <h3>交付条款</h3>\n");
            html.append("        <p>").append(quote.getDeliveryTerms()).append("</p>\n");
        }

        if (StrUtil.isNotBlank(quote.getRemark())) {
            html.append("        <h3>备注说明</h3>\n");
            html.append("        <p>").append(quote.getRemark()).append("</p>\n");
        }

        html.append("    </div>\n");

        // 页脚
        html.append("    <div class=\"footer\">\n");
        html.append("        <p><strong>销售负责人:</strong> ").append(defaultValue(quote.getOwnerUserName()))
                .append("</p>\n");
        html.append("        <p><strong>联系电话:</strong> 请联系您的专属销售</p>\n");
        html.append("        <p class=\"notice\">本报价单有效期至 ").append(formatDate(quote.getExpireDate()))
                .append(",过期需重新确认价格。</p>\n");
        html.append("    </div>\n");

        html.append("</body>\n");
        html.append("</html>");

        return html.toString();
    }

    /**
     * PDF样式
     */
    private String getPdfStyles() {
        return """
                * {
                    margin: 0;
                    padding: 0;
                    box-sizing: border-box;
                }
                body {
                    font-family: "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
                    line-height: 1.6;
                    color: #333;
                    padding: 40px;
                    background: #fff;
                    position: relative;
                }
                /* 水印层 */
                body::before {
                    content: '';
                    position: fixed;
                    top: 0;
                    left: 0;
                    width: 100%;
                    height: 100%;
                    background-image: url('/watermask.jpg');
                    background-repeat: no-repeat;
                    background-position: center center;
                    background-size: 50%;
                    opacity: 0.15;
                    z-index: 0;
                    pointer-events: none;
                }
                /* 确保所有内容在水印上方 */
                body > * {
                    position: relative;
                    z-index: 1;
                }
                .header {
                    text-align: center;
                    border-bottom: 3px solid #1890ff;
                    padding-bottom: 20px;
                    margin-bottom: 30px;
                }
                .header h1 {
                    font-size: 32px;
                    color: #1890ff;
                    margin-bottom: 10px;
                }
                .company-name {
                    font-size: 16px;
                    color: #666;
                }
                .quote-info, .customer-info {
                    margin-bottom: 30px;
                }
                .info-table {
                    width: 100%;
                    border-collapse: collapse;
                    margin-top: 10px;
                }
                .info-table td {
                    padding: 8px 12px;
                    border: 1px solid #e8e8e8;
                }
                .info-table td:nth-child(odd) {
                    background: #fafafa;
                    width: 120px;
                }
                .products {
                    margin-bottom: 30px;
                }
                h3 {
                    font-size: 18px;
                    color: #1890ff;
                    margin-bottom: 15px;
                    border-left: 4px solid #1890ff;
                    padding-left: 10px;
                }
                .product-table {
                    width: 100%;
                    border-collapse: collapse;
                    margin-top: 10px;
                }
                .product-table th {
                    background: #1890ff;
                    color: #fff;
                    padding: 12px 8px;
                    text-align: center;
                    font-weight: normal;
                }
                .product-table td {
                    padding: 10px 8px;
                    border: 1px solid #e8e8e8;
                }
                .product-table tbody tr:hover {
                    background: #f5f5f5;
                }
                .center {
                    text-align: center;
                }
                .right {
                    text-align: right;
                }
                .price-summary {
                    margin: 30px 0;
                    float: right;
                    width: 350px;
                }
                .summary-table {
                    width: 100%;
                    border-collapse: collapse;
                }
                .summary-table td {
                    padding: 10px 15px;
                    border: 1px solid #e8e8e8;
                }
                .summary-table .label {
                    background: #fafafa;
                    width: 150px;
                }
                .summary-table .value {
                    text-align: right;
                    font-size: 16px;
                }
                .summary-table .total {
                    background: #fff7e6;
                }
                .summary-table .total .value {
                    color: #ff4d4f;
                    font-size: 20px;
                }
                .terms {
                    clear: both;
                    margin-top: 50px;
                }
                .terms p {
                    padding: 10px 15px;
                    background: #f5f5f5;
                    border-radius: 4px;
                    line-height: 1.8;
                    margin-bottom: 10px;
                }
                .footer {
                    margin-top: 50px;
                    padding-top: 20px;
                    border-top: 2px solid #e8e8e8;
                    text-align: center;
                    color: #666;
                }
                .footer p {
                    margin: 8px 0;
                }
                .footer .notice {
                    color: #ff4d4f;
                    font-size: 14px;
                    margin-top: 20px;
                }
                @media print {
                    body {
                        padding: 20px;
                    }
                    /* 打印时也显示水印 */
                    body::before {
                        position: absolute;
                        print-color-adjust: exact;
                        -webkit-print-color-adjust: exact;
                    }
                    .header {
                        page-break-after: avoid;
                    }
                    .product-table {
                        page-break-inside: avoid;
                    }
                }
                """;
    }

    /**
     * 格式化日期
     */
    private String formatDate(Object date) {
        if (date == null) {
            return "";
        }
        if (date instanceof LocalDate) {
            return ((LocalDate) date).format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));
        }
        return date.toString();
    }

    /**
     * 格式化金额
     */
    private String formatMoney(BigDecimal amount) {
        if (amount == null) {
            return "0.00";
        }
        return String.format("%,.2f", amount);
    }

    /**
     * 格式化折扣
     */
    private String formatDiscount(BigDecimal discount) {
        if (discount == null || discount.compareTo(BigDecimal.ZERO) == 0) {
            return "无折扣";
        }
        return discount.stripTrailingZeros().toPlainString() + "%";
    }

    /**
     * 默认值处理
     */
    private String defaultValue(String value) {
        return StrUtil.isNotBlank(value) ? value : "-";
    }

}