package component_report

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/shopspring/decimal"
	"go.uber.org/zap"

	finance_entities "tyapi-server/internal/domains/finance/entities"
	"tyapi-server/internal/domains/product/entities"
	"tyapi-server/internal/domains/product/repositories"
	"tyapi-server/internal/shared/payment"
)

// ComponentReportHandler 组件报告处理器
type ComponentReportHandler struct {
	exampleJSONGenerator *ExampleJSONGenerator
	zipGenerator         *ZipGenerator
	productRepo          repositories.ProductRepository
	componentReportRepo  repositories.ComponentReportRepository
	rechargeRecordRepo   interface {
		Create(ctx context.Context, record finance_entities.RechargeRecord) (finance_entities.RechargeRecord, error)
	}
	alipayOrderRepo interface {
		Create(ctx context.Context, order finance_entities.AlipayOrder) (finance_entities.AlipayOrder, error)
		GetByOutTradeNo(ctx context.Context, outTradeNo string) (*finance_entities.AlipayOrder, error)
		Update(ctx context.Context, order finance_entities.AlipayOrder) error
	}
	wechatOrderRepo interface {
		Create(ctx context.Context, order finance_entities.WechatOrder) (finance_entities.WechatOrder, error)
		GetByOutTradeNo(ctx context.Context, outTradeNo string) (*finance_entities.WechatOrder, error)
		Update(ctx context.Context, order finance_entities.WechatOrder) error
	}
	aliPayService    *payment.AliPayService
	wechatPayService *payment.WechatPayService
	logger           *zap.Logger
}

// NewComponentReportHandler 创建组件报告处理器
func NewComponentReportHandler(
	productRepo repositories.ProductRepository,
	docRepo repositories.ProductDocumentationRepository,
	apiConfigRepo repositories.ProductApiConfigRepository,
	componentReportRepo repositories.ComponentReportRepository,
	rechargeRecordRepo interface {
		Create(ctx context.Context, record finance_entities.RechargeRecord) (finance_entities.RechargeRecord, error)
	},
	alipayOrderRepo interface {
		Create(ctx context.Context, order finance_entities.AlipayOrder) (finance_entities.AlipayOrder, error)
		GetByOutTradeNo(ctx context.Context, outTradeNo string) (*finance_entities.AlipayOrder, error)
		Update(ctx context.Context, order finance_entities.AlipayOrder) error
	},
	wechatOrderRepo interface {
		Create(ctx context.Context, order finance_entities.WechatOrder) (finance_entities.WechatOrder, error)
		GetByOutTradeNo(ctx context.Context, outTradeNo string) (*finance_entities.WechatOrder, error)
		Update(ctx context.Context, order finance_entities.WechatOrder) error
	},
	aliPayService *payment.AliPayService,
	wechatPayService *payment.WechatPayService,
	logger *zap.Logger,
) *ComponentReportHandler {
	exampleJSONGenerator := NewExampleJSONGenerator(productRepo, docRepo, apiConfigRepo, logger)
	zipGenerator := NewZipGenerator(logger)

	return &ComponentReportHandler{
		exampleJSONGenerator: exampleJSONGenerator,
		zipGenerator:         zipGenerator,
		productRepo:          productRepo,
		componentReportRepo:  componentReportRepo,
		rechargeRecordRepo:   rechargeRecordRepo,
		alipayOrderRepo:      alipayOrderRepo,
		wechatOrderRepo:      wechatOrderRepo,
		aliPayService:        aliPayService,
		wechatPayService:     wechatPayService,
		logger:               logger,
	}
}

// GenerateExampleJSONRequest 生成示例JSON请求
type GenerateExampleJSONRequest struct {
	ProductID       string   `json:"product_id" binding:"required"` // 产品ID
	SubProductCodes []string `json:"sub_product_codes,omitempty"`   // 子产品编号列表（可选）
}

// GenerateExampleJSONResponse 生成示例JSON响应
type GenerateExampleJSONResponse struct {
	ProductID   string `json:"product_id"`
	JSONContent string `json:"json_content"`
	JSONSize    int    `json:"json_size"`
}

// GenerateExampleJSON 生成 example.json 文件内容（HTTP接口）
// POST /api/v1/component-report/generate-example-json
func (h *ComponentReportHandler) GenerateExampleJSON(c *gin.Context) {
	var req GenerateExampleJSONRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误",
			"error":   err.Error(),
		})
		return
	}

	// 生成 example.json
	jsonData, err := h.exampleJSONGenerator.GenerateExampleJSON(c.Request.Context(), req.ProductID, req.SubProductCodes)
	if err != nil {
		h.logger.Error("生成example.json失败", zap.Error(err), zap.String("product_id", req.ProductID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "生成example.json失败",
			"error":   err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, GenerateExampleJSONResponse{
		ProductID:   req.ProductID,
		JSONContent: string(jsonData),
		JSONSize:    len(jsonData),
	})
}

// GenerateZipRequest 生成ZIP文件请求
type GenerateZipRequest struct {
	ProductID       string   `json:"product_id" binding:"required"` // 产品ID
	SubProductCodes []string `json:"sub_product_codes,omitempty"`   // 子产品编号列表（可选）
	OutputPath      string   `json:"output_path,omitempty"`         // 输出路径（可选）
}

// GenerateZip 生成ZIP文件（HTTP接口）
// POST /api/v1/component-report/generate-zip
func (h *ComponentReportHandler) GenerateZip(c *gin.Context) {
	var req GenerateZipRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误",
			"error":   err.Error(),
		})
		return
	}

	// 生成ZIP文件
	zipPath, err := h.zipGenerator.GenerateZipFile(
		c.Request.Context(),
		req.ProductID,
		req.SubProductCodes,
		h.exampleJSONGenerator,
		req.OutputPath,
	)
	if err != nil {
		h.logger.Error("生成ZIP文件失败", zap.Error(err), zap.String("product_id", req.ProductID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "生成ZIP文件失败",
			"error":   err.Error(),
		})
		return
	}

	// 检查文件是否存在
	fileInfo, err := os.Stat(zipPath)
	if err != nil {
		h.logger.Error("ZIP文件不存在", zap.Error(err), zap.String("zip_path", zipPath))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "ZIP文件不存在",
			"error":   err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code":      200,
		"message":   "ZIP文件生成成功",
		"zip_path":  zipPath,
		"file_size": fileInfo.Size(),
		"file_name": filepath.Base(zipPath),
	})
}

// DownloadZip 下载ZIP文件（HTTP接口）
// GET /api/v1/component-report/download-zip/:product_id
func (h *ComponentReportHandler) DownloadZip(c *gin.Context) {
	productID := c.Param("product_id")
	if productID == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "产品ID不能为空",
		})
		return
	}

	// 构建ZIP文件路径
	zipPath := filepath.Join("storage/component-reports", fmt.Sprintf("%s_example.json.zip", productID))

	// 检查文件是否存在
	if _, err := os.Stat(zipPath); os.IsNotExist(err) {
		c.JSON(http.StatusNotFound, gin.H{
			"code":    404,
			"message": "ZIP文件不存在，请先生成ZIP文件",
		})
		return
	}

	// 设置响应头
	c.Header("Content-Type", "application/zip")
	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filepath.Base(zipPath)))

	// 发送文件
	c.File(zipPath)
}

// DownloadExampleJSON 生成并下载 example.json 文件（HTTP接口）
// POST /api/v1/component-report/download-example-json
func (h *ComponentReportHandler) DownloadExampleJSON(c *gin.Context) {
	var req GenerateExampleJSONRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误",
			"error":   err.Error(),
		})
		return
	}

	// 生成 example.json
	jsonData, err := h.exampleJSONGenerator.GenerateExampleJSON(c.Request.Context(), req.ProductID, req.SubProductCodes)
	if err != nil {
		h.logger.Error("生成example.json失败", zap.Error(err), zap.String("product_id", req.ProductID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "生成example.json失败",
			"error":   err.Error(),
		})
		return
	}

	// 设置响应头，直接下载JSON文件
	c.Header("Content-Type", "application/json; charset=utf-8")
	c.Header("Content-Disposition", "attachment; filename=example.json")

	// 发送JSON数据
	c.Data(http.StatusOK, "application/json; charset=utf-8", jsonData)
}

// GenerateAndDownloadZip 生成并下载ZIP文件（HTTP接口）
// POST /api/v1/component-report/generate-and-download
func (h *ComponentReportHandler) GenerateAndDownloadZip(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code":    401,
			"message": "用户未登录",
		})
		return
	}

	var req GenerateZipRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误",
			"error":   err.Error(),
		})
		return
	}

	// 验证用户是否已支付
	// 检查用户是否有已支付的下载记录
	downloads, err := h.componentReportRepo.GetUserDownloads(c.Request.Context(), userID, &req.ProductID)
	if err != nil {
		h.logger.Error("查询用户下载记录失败", zap.Error(err), zap.String("user_id", userID), zap.String("product_id", req.ProductID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "查询下载记录失败",
		})
		return
	}

	// 检查是否有已支付的下载记录
	hasPaid := false
	for _, download := range downloads {
		if download.PaymentStatus == "success" && !download.IsExpired() {
			hasPaid = true
			break
		}
	}

	if !hasPaid {
		h.logger.Warn("用户未支付，拒绝下载",
			zap.String("user_id", userID),
			zap.String("product_id", req.ProductID),
		)
		c.JSON(http.StatusForbidden, gin.H{
			"code":    403,
			"message": "请先支付后再下载",
		})
		return
	}

	// 生成ZIP文件
	zipPath, err := h.zipGenerator.GenerateZipFile(
		c.Request.Context(),
		req.ProductID,
		req.SubProductCodes,
		h.exampleJSONGenerator,
		"", // 使用默认路径
	)
	if err != nil {
		h.logger.Error("生成ZIP文件失败", zap.Error(err), zap.String("product_id", req.ProductID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "生成ZIP文件失败",
			"error":   err.Error(),
		})
		return
	}

	// 检查文件是否存在
	if _, err := os.Stat(zipPath); os.IsNotExist(err) {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "ZIP文件生成失败",
		})
		return
	}

	// 设置响应头
	c.Header("Content-Type", "application/zip")
	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filepath.Base(zipPath)))

	// 发送文件
	c.File(zipPath)
}

// CheckDownloadAvailabilityResponse 检查下载可用性响应
type CheckDownloadAvailabilityResponse struct {
	CanDownload         bool     `json:"can_download"`           // 是否可以下载
	IsPackage           bool     `json:"is_package"`             // 是否为组合包
	AllSubProductsExist bool     `json:"all_sub_products_exist"` // 所有子产品是否在ui目录存在
	MissingSubProducts  []string `json:"missing_sub_products"`   // 缺失的子产品编号列表
	Message             string   `json:"message"`                // 提示信息
}

// CheckDownloadAvailability 检查下载可用性
// GET /api/v1/products/:id/component-report/check
func (h *ComponentReportHandler) CheckDownloadAvailability(c *gin.Context) {
	productID := c.Param("id")
	if productID == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "产品ID不能为空",
		})
		return
	}

	// 获取产品信息
	product, err := h.productRepo.GetByID(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取产品信息失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusNotFound, gin.H{
			"code":    404,
			"message": "产品不存在",
		})
		return
	}

	// 检查是否为组合包
	if !product.IsPackage {
		c.JSON(http.StatusOK, CheckDownloadAvailabilityResponse{
			CanDownload: false,
			IsPackage:   false,
			Message:     "只有组合包产品才能下载示例报告",
		})
		return
	}

	// 获取组合包子产品
	packageItems, err := h.productRepo.GetPackageItems(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取组合包子产品失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "获取组合包子产品失败",
		})
		return
	}

	if len(packageItems) == 0 {
		c.JSON(http.StatusOK, CheckDownloadAvailabilityResponse{
			CanDownload: false,
			IsPackage:   true,
			Message:     "组合包没有子产品",
		})
		return
	}

	// 检查所有子产品是否在ui目录存在
	var missingSubProducts []string
	allExist := true

	for _, item := range packageItems {
		var productCode string
		if item.Product != nil {
			productCode = item.Product.Code
		} else {
			// 如果Product未加载，需要获取子产品信息
			subProduct, err := h.productRepo.GetByID(c.Request.Context(), item.ProductID)
			if err != nil {
				h.logger.Warn("获取子产品信息失败", zap.Error(err), zap.String("product_id", item.ProductID))
				missingSubProducts = append(missingSubProducts, item.ProductID)
				allExist = false
				continue
			}
			productCode = subProduct.Code
		}

		if productCode == "" {
			missingSubProducts = append(missingSubProducts, item.ProductID)
			allExist = false
			continue
		}

		// 检查是否在ui目录存在
		_, _, err := h.exampleJSONGenerator.MatchProductCodeToPath(c.Request.Context(), productCode)
		if err != nil {
			missingSubProducts = append(missingSubProducts, productCode)
			allExist = false
		}
	}

	canDownload := allExist && len(missingSubProducts) == 0
	message := "可以下载"
	if !canDownload {
		message = fmt.Sprintf("以下子产品的UI组件不存在: %v", missingSubProducts)
	}

	c.JSON(http.StatusOK, CheckDownloadAvailabilityResponse{
		CanDownload:         canDownload,
		IsPackage:           true,
		AllSubProductsExist: allExist,
		MissingSubProducts:  missingSubProducts,
		Message:             message,
	})
}

// GetDownloadInfoResponse 获取下载信息响应
type GetDownloadInfoResponse struct {
	ProductID              string                `json:"product_id"`
	ProductCode            string                `json:"product_code"`
	ProductName            string                `json:"product_name"`
	IsPackage              bool                  `json:"is_package"`
	SubProducts            []SubProductPriceInfo `json:"sub_products"`
	OriginalTotalPrice     string                `json:"original_total_price"`
	DiscountAmount         string                `json:"discount_amount"`
	FinalPrice             string                `json:"final_price"`
	DownloadedProductCodes []string              `json:"downloaded_product_codes"`
	CanDownload            bool                  `json:"can_download"`
}

// SubProductPriceInfo 子产品价格信息
type SubProductPriceInfo struct {
	ProductID    string `json:"product_id"`
	ProductCode  string `json:"product_code"`
	ProductName  string `json:"product_name"`
	Price        string `json:"price"`
	IsDownloaded bool   `json:"is_downloaded"`
}

// GetDownloadInfo 获取下载信息和价格计算
// GET /api/v1/products/:id/component-report/info
func (h *ComponentReportHandler) GetDownloadInfo(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code":    401,
			"message": "用户未登录",
		})
		return
	}

	productID := c.Param("id")
	if productID == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "产品ID不能为空",
		})
		return
	}

	// 获取产品信息
	product, err := h.productRepo.GetByID(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取产品信息失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusNotFound, gin.H{
			"code":    404,
			"message": "产品不存在",
		})
		return
	}

	// 检查是否为组合包
	if !product.IsPackage {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "只有组合包产品才能下载示例报告",
		})
		return
	}

	// 获取组合包子产品
	packageItems, err := h.productRepo.GetPackageItems(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取组合包子产品失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "获取组合包子产品失败",
		})
		return
	}

	// 获取用户已下载的产品编号列表
	downloadedCodes, err := h.componentReportRepo.GetUserDownloadedProductCodes(c.Request.Context(), userID)
	if err != nil {
		h.logger.Warn("获取用户已下载产品编号失败", zap.Error(err), zap.String("user_id", userID))
		downloadedCodes = []string{}
	}

	// 创建已下载编号的map用于快速查找
	downloadedMap := make(map[string]bool)
	for _, code := range downloadedCodes {
		downloadedMap[code] = true
	}

	// 计算价格
	originalTotal := decimal.Zero
	discountAmount := decimal.Zero
	var subProducts []SubProductPriceInfo

	for _, item := range packageItems {
		var subProduct entities.Product
		var productCode string
		var productName string
		var price decimal.Decimal

		if item.Product != nil {
			subProduct = *item.Product
			productCode = subProduct.Code
			productName = subProduct.Name
			price = subProduct.Price
		} else {
			// 如果Product未加载，需要获取子产品信息
			subProduct, err = h.productRepo.GetByID(c.Request.Context(), item.ProductID)
			if err != nil {
				h.logger.Warn("获取子产品信息失败", zap.Error(err), zap.String("product_id", item.ProductID))
				continue
			}
			productCode = subProduct.Code
			productName = subProduct.Name
			price = subProduct.Price
		}

		if productCode == "" {
			continue
		}

		// 检查是否已下载
		isDownloaded := downloadedMap[productCode]
		originalTotal = originalTotal.Add(price)
		if isDownloaded {
			discountAmount = discountAmount.Add(price)
		}

		subProducts = append(subProducts, SubProductPriceInfo{
			ProductID:    subProduct.ID,
			ProductCode:  productCode,
			ProductName:  productName,
			Price:        price.String(),
			IsDownloaded: isDownloaded,
		})
	}

	finalPrice := originalTotal.Sub(discountAmount)

	// ========== 测试阶段：强制设置支付金额为0.01 ==========
	// TODO: 测试完成后请删除或注释掉以下3行代码，恢复原始价格计算
	if finalPrice.GreaterThan(decimal.Zero) {
		finalPrice = decimal.NewFromFloat(0.01)
	}
	// ====================================================

	// 检查用户是否有已支付的下载记录（针对当前产品）
	// can_download 应该基于实际支付状态，而不是价格
	hasPaidDownload := false
	downloads, err := h.componentReportRepo.GetUserDownloads(c.Request.Context(), userID, &productID)
	if err == nil {
		for _, download := range downloads {
			if download.PaymentStatus == "success" && !download.IsExpired() {
				hasPaidDownload = true
				break
			}
		}
	}

	// 如果可以下载：价格为0（免费）或者用户已支付
	canDownload := finalPrice.IsZero() || hasPaidDownload

	c.JSON(http.StatusOK, GetDownloadInfoResponse{
		ProductID:              productID,
		ProductCode:            product.Code,
		ProductName:            product.Name,
		IsPackage:              true,
		SubProducts:            subProducts,
		OriginalTotalPrice:     originalTotal.String(),
		DiscountAmount:         discountAmount.String(),
		FinalPrice:             finalPrice.String(),
		DownloadedProductCodes: downloadedCodes,
		CanDownload:            canDownload,
	})
}

// CreatePaymentOrderRequest 创建支付订单请求
type CreatePaymentOrderRequest struct {
	PaymentType string `json:"payment_type" binding:"required"` // wechat 或 alipay
	Platform    string `json:"platform,omitempty"`              // 支付平台：app, h5, pc（可选，默认根据User-Agent判断）
}

// CreatePaymentOrderResponse 创建支付订单响应
type CreatePaymentOrderResponse struct {
	OrderID     string `json:"order_id"`     // 订单ID
	CodeURL     string `json:"code_url"`     // 支付二维码URL（微信）
	PayURL      string `json:"pay_url"`      // 支付链接（支付宝）
	PaymentType string `json:"payment_type"` // 支付类型
	Amount      string `json:"amount"`       // 支付金额
}

// CreatePaymentOrder 创建支付订单
// POST /api/v1/products/:id/component-report/create-order
func (h *ComponentReportHandler) CreatePaymentOrder(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code":    401,
			"message": "用户未登录",
		})
		return
	}

	productID := c.Param("id")
	if productID == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "产品ID不能为空",
		})
		return
	}

	var req CreatePaymentOrderRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误",
			"error":   err.Error(),
		})
		return
	}

	if req.PaymentType != "wechat" && req.PaymentType != "alipay" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "支付类型必须是 wechat 或 alipay",
		})
		return
	}

	// 确定支付平台类型（app/h5/pc）
	platform := req.Platform
	if platform == "" {
		// 根据 User-Agent 判断平台类型
		userAgent := c.GetHeader("User-Agent")
		platform = h.detectPlatform(userAgent)
	}

	// 验证平台类型
	if req.PaymentType == "alipay" {
		if platform != "app" && platform != "h5" && platform != "pc" {
			platform = "h5" // 默认使用 H5 支付
		}
	} else if req.PaymentType == "wechat" {
		// 微信支付目前只支持 native（扫码支付）
		platform = "native"
	}

	// 获取下载信息以计算价格
	product, err := h.productRepo.GetByID(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取产品信息失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusNotFound, gin.H{
			"code":    404,
			"message": "产品不存在",
		})
		return
	}

	if !product.IsPackage {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "只有组合包产品才能下载示例报告",
		})
		return
	}

	// 获取组合包子产品
	packageItems, err := h.productRepo.GetPackageItems(c.Request.Context(), productID)
	if err != nil {
		h.logger.Error("获取组合包子产品失败", zap.Error(err), zap.String("product_id", productID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "获取组合包子产品失败",
		})
		return
	}

	// 获取用户已下载的产品编号列表
	downloadedCodes, err := h.componentReportRepo.GetUserDownloadedProductCodes(c.Request.Context(), userID)
	if err != nil {
		h.logger.Warn("获取用户已下载产品编号失败", zap.Error(err), zap.String("user_id", userID))
		downloadedCodes = []string{}
	}

	// 创建已下载编号的map用于快速查找
	downloadedMap := make(map[string]bool)
	for _, code := range downloadedCodes {
		downloadedMap[code] = true
	}

	// 计算价格
	originalTotal := decimal.Zero
	discountAmount := decimal.Zero
	var subProductCodes []string
	var subProductIDs []string

	for _, item := range packageItems {
		var subProduct entities.Product
		var productCode string

		if item.Product != nil {
			subProduct = *item.Product
			productCode = subProduct.Code
		} else {
			subProduct, err = h.productRepo.GetByID(c.Request.Context(), item.ProductID)
			if err != nil {
				continue
			}
			productCode = subProduct.Code
		}

		if productCode == "" {
			continue
		}

		subProductCodes = append(subProductCodes, productCode)
		subProductIDs = append(subProductIDs, subProduct.ID)

		// 检查是否已下载
		if !downloadedMap[productCode] {
			originalTotal = originalTotal.Add(subProduct.Price)
		} else {
			discountAmount = discountAmount.Add(subProduct.Price)
		}
	}

	finalPrice := originalTotal.Sub(discountAmount)

	// ========== 测试阶段：强制设置支付金额为0.01 ==========
	// TODO: 测试完成后请删除或注释掉以下2行代码，恢复原始价格计算
	if finalPrice.GreaterThan(decimal.Zero) {
		finalPrice = decimal.NewFromFloat(0.01)
	}
	// ====================================================

	if finalPrice.LessThanOrEqual(decimal.Zero) {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "无需支付，所有子产品已下载",
		})
		return
	}

	// 验证数据完整性
	if len(subProductCodes) == 0 {
		h.logger.Warn("子产品列表为空", zap.String("product_id", productID))
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "子产品列表为空，无法创建下载记录",
		})
		return
	}

	// 验证必要字段
	if product.Code == "" {
		h.logger.Error("产品编号为空", zap.String("product_id", productID))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "产品编号为空，无法创建下载记录",
		})
		return
	}

	// 序列化子产品编号列表
	subProductCodesJSON, err := json.Marshal(subProductCodes)
	if err != nil {
		h.logger.Error("序列化子产品编号列表失败", zap.Error(err))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "序列化子产品编号列表失败",
			"error":   err.Error(),
		})
		return
	}

	subProductIDsJSON, err := json.Marshal(subProductIDs)
	if err != nil {
		h.logger.Error("序列化子产品ID列表失败", zap.Error(err))
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "序列化子产品ID列表失败",
			"error":   err.Error(),
		})
		return
	}

	// 创建下载记录
	download := &entities.ComponentReportDownload{
		UserID:          userID,
		ProductID:       productID,
		ProductCode:     product.Code,
		SubProductIDs:   string(subProductIDsJSON),
		SubProductCodes: string(subProductCodesJSON),
		DownloadPrice:   finalPrice,
		OriginalPrice:   originalTotal,
		DiscountAmount:  discountAmount,
		PaymentStatus:   "pending",
		PaymentType:     &req.PaymentType,
	}

	// 记录创建前的详细信息用于调试
	h.logger.Info("准备创建下载记录",
		zap.String("user_id", userID),
		zap.String("product_id", productID),
		zap.String("product_code", product.Code),
		zap.String("download_price", finalPrice.String()),
		zap.String("original_price", originalTotal.String()),
		zap.String("discount_amount", discountAmount.String()),
		zap.Int("sub_product_count", len(subProductCodes)),
	)

	createdDownload, err := h.componentReportRepo.CreateDownload(c.Request.Context(), download)
	if err != nil {
		// 记录详细的错误信息
		h.logger.Error("创建下载记录失败",
			zap.Error(err),
			zap.String("user_id", userID),
			zap.String("product_id", productID),
			zap.String("product_code", product.Code),
			zap.String("download_price", finalPrice.String()),
			zap.Any("sub_product_codes", subProductCodes),
			zap.Any("sub_product_ids", subProductIDs),
		)

		// 返回更详细的错误信息（开发环境可以显示，生产环境可以隐藏）
		errorMsg := "创建下载记录失败"
		if err.Error() != "" {
			errorMsg = fmt.Sprintf("创建下载记录失败: %s", err.Error())
		}

		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": errorMsg,
			"error":   err.Error(), // 包含具体错误信息便于调试
		})
		return
	}

	// 生成商户订单号
	var outTradeNo string
	if req.PaymentType == "alipay" {
		outTradeNo = h.aliPayService.GenerateOutTradeNo()
	} else {
		outTradeNo = h.wechatPayService.GenerateOutTradeNo()
	}

	// 构建订单主题和备注
	subject := fmt.Sprintf("组件报告下载-%s", product.Name)
	if len(subProductCodes) > 0 {
		subject = fmt.Sprintf("组件报告下载-%s(%d个子产品)", product.Name, len(subProductCodes))
	}
	notes := fmt.Sprintf("购买%s报告示例", product.Name)

	h.logger.Info("========== 开始创建组件报告下载支付订单 ==========",
		zap.String("download_id", createdDownload.ID),
		zap.String("out_trade_no", outTradeNo),
		zap.String("payment_type", req.PaymentType),
		zap.String("amount", finalPrice.String()),
		zap.String("product_name", product.Name),
	)

	// 创建充值记录和支付订单记录
	var rechargeRecord finance_entities.RechargeRecord
	if req.PaymentType == "alipay" {
		h.logger.Info("步骤1: 创建支付宝充值记录",
			zap.String("out_trade_no", outTradeNo),
			zap.String("user_id", userID),
			zap.String("amount", finalPrice.String()),
			zap.String("notes", notes),
		)
		// 使用带备注的工厂方法创建充值记录
		rechargeRecordPtr := finance_entities.NewAlipayRechargeRecordWithNotes(userID, finalPrice, outTradeNo, notes)
		rechargeRecord, err = h.rechargeRecordRepo.Create(c.Request.Context(), *rechargeRecordPtr)
		if err != nil {
			h.logger.Error("创建支付宝充值记录失败", zap.Error(err))
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建支付宝充值记录失败",
				"error":   err.Error(),
			})
			return
		}

		h.logger.Info("步骤2: 创建支付宝订单记录",
			zap.String("recharge_id", rechargeRecord.ID),
			zap.String("out_trade_no", outTradeNo),
			zap.String("subject", subject),
		)
		alipayOrder := finance_entities.NewAlipayOrder(rechargeRecord.ID, outTradeNo, subject, finalPrice, platform)
		_, err = h.alipayOrderRepo.Create(c.Request.Context(), *alipayOrder)
		if err != nil {
			h.logger.Error("创建支付宝订单记录失败", zap.Error(err))
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建支付宝订单记录失败",
				"error":   err.Error(),
			})
			return
		}
	} else {
		h.logger.Info("步骤1: 创建微信充值记录",
			zap.String("out_trade_no", outTradeNo),
			zap.String("user_id", userID),
			zap.String("amount", finalPrice.String()),
			zap.String("notes", notes),
		)
		// 使用带备注的工厂方法创建充值记录
		rechargeRecordPtr := finance_entities.NewWechatRechargeRecordWithNotes(userID, finalPrice, outTradeNo, notes)
		rechargeRecord, err = h.rechargeRecordRepo.Create(c.Request.Context(), *rechargeRecordPtr)
		if err != nil {
			h.logger.Error("创建微信充值记录失败", zap.Error(err))
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建微信充值记录失败",
				"error":   err.Error(),
			})
			return
		}

		h.logger.Info("步骤2: 创建微信订单记录",
			zap.String("recharge_id", rechargeRecord.ID),
			zap.String("out_trade_no", outTradeNo),
			zap.String("subject", subject),
		)
		wechatOrder := finance_entities.NewWechatOrder(rechargeRecord.ID, outTradeNo, subject, finalPrice, platform)
		_, err = h.wechatOrderRepo.Create(c.Request.Context(), *wechatOrder)
		if err != nil {
			h.logger.Error("创建微信订单记录失败", zap.Error(err))
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建微信订单记录失败",
				"error":   err.Error(),
			})
			return
		}
	}

	// 更新下载记录的支付订单号
	createdDownload.PaymentOrderID = &outTradeNo
	err = h.componentReportRepo.UpdateDownload(c.Request.Context(), createdDownload)
	if err != nil {
		h.logger.Error("更新下载记录支付订单号失败", zap.Error(err))
		// 不阻断流程，继续执行
	}

	h.logger.Info("步骤3: 调用支付接口创建订单",
		zap.String("out_trade_no", outTradeNo),
		zap.String("platform", platform),
	)

	// 调用支付服务创建订单
	var payURL string
	var codeURL string

	if req.PaymentType == "alipay" {
		// 调用支付宝支付服务
		payURL, err = h.aliPayService.CreateAlipayOrder(c.Request.Context(), platform, finalPrice, subject, outTradeNo)
		if err != nil {
			h.logger.Error("创建支付宝订单失败",
				zap.Error(err),
				zap.String("out_trade_no", outTradeNo),
				zap.String("platform", platform),
				zap.String("amount", finalPrice.String()),
			)
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建支付宝订单失败",
				"error":   err.Error(),
			})
			return
		}
		h.logger.Info("步骤4: 支付宝订单创建成功",
			zap.String("out_trade_no", outTradeNo),
			zap.String("pay_url", payURL),
		)
	} else {
		// 调用微信支付服务（目前只支持 native 扫码支付）
		amountFloat, _ := finalPrice.Float64()
		result, err := h.wechatPayService.CreateWechatNativeOrder(c.Request.Context(), amountFloat, subject, outTradeNo)
		if err != nil {
			h.logger.Error("创建微信支付订单失败",
				zap.Error(err),
				zap.String("out_trade_no", outTradeNo),
				zap.String("amount", finalPrice.String()),
			)
			c.JSON(http.StatusInternalServerError, gin.H{
				"code":    500,
				"message": "创建微信支付订单失败",
				"error":   err.Error(),
			})
			return
		}
		// 微信返回的是二维码URL
		if resultMap, ok := result.(map[string]string); ok {
			if url, exists := resultMap["code_url"]; exists {
				codeURL = url
			}
		} else if resultMap, ok := result.(map[string]interface{}); ok {
			// 兼容处理
			if url, exists := resultMap["code_url"]; exists {
				codeURL = fmt.Sprintf("%v", url)
			}
		}
		h.logger.Info("步骤4: 微信订单创建成功",
			zap.String("out_trade_no", outTradeNo),
			zap.String("code_url", codeURL),
		)
	}

	response := CreatePaymentOrderResponse{
		OrderID:     createdDownload.ID,
		PaymentType: req.PaymentType,
		Amount:      finalPrice.String(),
	}

	if req.PaymentType == "wechat" {
		response.CodeURL = codeURL
	} else {
		response.PayURL = payURL
	}

	h.logger.Info("========== 组件报告下载支付订单创建完成 ==========",
		zap.String("order_id", createdDownload.ID),
		zap.String("out_trade_no", outTradeNo),
		zap.String("recharge_id", rechargeRecord.ID),
		zap.String("payment_type", req.PaymentType),
		zap.String("platform", platform),
		zap.String("amount", finalPrice.String()),
		zap.String("notes", notes),
	)

	c.JSON(http.StatusOK, response)
}

// CheckPaymentStatusResponse 检查支付状态响应
type CheckPaymentStatusResponse struct {
	OrderID       string `json:"order_id"`       // 订单ID
	PaymentStatus string `json:"payment_status"` // 支付状态：pending, success, failed
	CanDownload   bool   `json:"can_download"`   // 是否可以下载
}

// CheckPaymentStatus 检查支付状态
// GET /api/v1/products/:id/component-report/check-payment/:orderId
func (h *ComponentReportHandler) CheckPaymentStatus(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code":    401,
			"message": "用户未登录",
		})
		return
	}

	orderID := c.Param("orderId")
	if orderID == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "订单ID不能为空",
		})
		return
	}

	// 根据订单ID查询下载记录
	download, err := h.componentReportRepo.GetDownloadByID(c.Request.Context(), orderID)
	if err != nil {
		h.logger.Error("查询下载记录失败", zap.Error(err), zap.String("order_id", orderID))
		c.JSON(http.StatusNotFound, gin.H{
			"code":    404,
			"message": "订单不存在",
		})
		return
	}

	// 验证订单是否属于当前用户
	if download.UserID != userID {
		c.JSON(http.StatusForbidden, gin.H{
			"code":    403,
			"message": "无权访问此订单",
		})
		return
	}

	// 如果订单状态是 pending，主动查询支付订单状态
	if download.PaymentStatus == "pending" && download.PaymentOrderID != nil {
		outTradeNo := *download.PaymentOrderID
		h.logger.Info("订单状态为pending，主动查询支付订单状态",
			zap.String("order_id", orderID),
			zap.String("out_trade_no", outTradeNo),
			zap.String("payment_type", func() string {
				if download.PaymentType != nil {
					return *download.PaymentType
				}
				return "unknown"
			}()),
		)

		// 根据支付类型查询订单状态
		if download.PaymentType != nil && *download.PaymentType == "wechat" {
			// 查询微信订单状态
			wechatOrder, err := h.wechatOrderRepo.GetByOutTradeNo(c.Request.Context(), outTradeNo)
			if err == nil && wechatOrder != nil {
				// 如果订单状态为pending，主动查询微信订单状态
				if wechatOrder.Status == finance_entities.WechatOrderStatusPending {
					h.logger.Info("微信订单状态为pending，主动查询微信支付状态",
						zap.String("out_trade_no", outTradeNo),
					)

					// 调用微信查询接口
					transaction, err := h.wechatPayService.QueryOrderStatus(c.Request.Context(), outTradeNo)
					if err == nil && transaction != nil {
						tradeState := ""
						transactionID := ""
						if transaction.TradeState != nil {
							tradeState = *transaction.TradeState
						}
						if transaction.TransactionId != nil {
							transactionID = *transaction.TransactionId
						}

						h.logger.Info("微信查询订单状态返回",
							zap.String("out_trade_no", outTradeNo),
							zap.String("trade_state", tradeState),
							zap.String("transaction_id", transactionID),
						)

						// 如果支付成功，更新订单状态（这里需要调用 FinanceApplicationService 的方法）
						// 由于没有直接访问 FinanceApplicationService，我们只更新下载记录状态
						if tradeState == "SUCCESS" {
							h.logger.Info("检测到微信支付成功，更新下载记录状态",
								zap.String("out_trade_no", outTradeNo),
								zap.String("download_id", download.ID),
							)

							// 更新微信订单状态
							payAmount := decimal.Zero
							if transaction.Amount != nil && transaction.Amount.Total != nil {
								payAmount = decimal.NewFromInt(*transaction.Amount.Total).Div(decimal.NewFromInt(100))
							}
							wechatOrder.MarkSuccess(transactionID, "", "", payAmount, payAmount)
							err = h.wechatOrderRepo.Update(c.Request.Context(), *wechatOrder)
							if err != nil {
								h.logger.Error("更新微信订单状态失败", zap.Error(err))
							}

							// 更新下载记录状态
							download.PaymentStatus = "success"
							// 设置过期时间（30天后）
							expiresAt := time.Now().Add(30 * 24 * time.Hour)
							download.ExpiresAt = &expiresAt
							err = h.componentReportRepo.UpdateDownload(c.Request.Context(), download)
							if err != nil {
								h.logger.Error("更新下载记录状态失败", zap.Error(err))
							} else {
								h.logger.Info("下载记录状态更新成功",
									zap.String("download_id", download.ID),
									zap.String("payment_status", download.PaymentStatus),
								)
							}
						}
					}
				} else if wechatOrder.Status == finance_entities.WechatOrderStatusSuccess {
					// 订单已成功，但下载记录状态未更新，更新下载记录
					if download.PaymentStatus != "success" {
						h.logger.Info("微信订单已成功，但下载记录状态未更新，更新下载记录",
							zap.String("out_trade_no", outTradeNo),
							zap.String("download_id", download.ID),
						)
						download.PaymentStatus = "success"
						expiresAt := time.Now().Add(30 * 24 * time.Hour)
						download.ExpiresAt = &expiresAt
						err = h.componentReportRepo.UpdateDownload(c.Request.Context(), download)
						if err != nil {
							h.logger.Error("更新下载记录状态失败", zap.Error(err))
						}
					}
				}
			}
		} else if download.PaymentType != nil && *download.PaymentType == "alipay" {
			// 查询支付宝订单状态
			alipayOrder, err := h.alipayOrderRepo.GetByOutTradeNo(c.Request.Context(), outTradeNo)
			if err == nil && alipayOrder != nil {
				// 如果订单状态为pending，主动查询支付宝订单状态
				if alipayOrder.Status == finance_entities.AlipayOrderStatusPending {
					h.logger.Info("支付宝订单状态为pending，主动查询支付宝支付状态",
						zap.String("out_trade_no", outTradeNo),
					)

					// 调用支付宝查询接口
					alipayResp, err := h.aliPayService.QueryOrderStatus(c.Request.Context(), outTradeNo)
					if err == nil && alipayResp != nil {
						alipayStatus := alipayResp.TradeStatus
						h.logger.Info("支付宝查询订单状态返回",
							zap.String("out_trade_no", outTradeNo),
							zap.String("trade_status", string(alipayStatus)),
							zap.String("trade_no", alipayResp.TradeNo),
						)

						// 如果支付成功，更新订单状态
						if alipayStatus == "TRADE_SUCCESS" || alipayStatus == "TRADE_FINISHED" {
							h.logger.Info("检测到支付宝支付成功，更新下载记录状态",
								zap.String("out_trade_no", outTradeNo),
								zap.String("download_id", download.ID),
							)

							// 更新支付宝订单状态
							amount, _ := decimal.NewFromString(alipayResp.TotalAmount)
							alipayOrder.MarkSuccess(alipayResp.TradeNo, "", "", amount, amount)
							err = h.alipayOrderRepo.Update(c.Request.Context(), *alipayOrder)
							if err != nil {
								h.logger.Error("更新支付宝订单状态失败", zap.Error(err))
							}

							// 更新下载记录状态
							download.PaymentStatus = "success"
							expiresAt := time.Now().Add(30 * 24 * time.Hour)
							download.ExpiresAt = &expiresAt
							err = h.componentReportRepo.UpdateDownload(c.Request.Context(), download)
							if err != nil {
								h.logger.Error("更新下载记录状态失败", zap.Error(err))
							} else {
								h.logger.Info("下载记录状态更新成功",
									zap.String("download_id", download.ID),
									zap.String("payment_status", download.PaymentStatus),
								)
							}
						}
					}
				} else if alipayOrder.Status == finance_entities.AlipayOrderStatusSuccess {
					// 订单已成功，但下载记录状态未更新，更新下载记录
					if download.PaymentStatus != "success" {
						h.logger.Info("支付宝订单已成功，但下载记录状态未更新，更新下载记录",
							zap.String("out_trade_no", outTradeNo),
							zap.String("download_id", download.ID),
						)
						download.PaymentStatus = "success"
						expiresAt := time.Now().Add(30 * 24 * time.Hour)
						download.ExpiresAt = &expiresAt
						err = h.componentReportRepo.UpdateDownload(c.Request.Context(), download)
						if err != nil {
							h.logger.Error("更新下载记录状态失败", zap.Error(err))
						}
					}
				}
			}
		}

		// 重新获取更新后的下载记录
		updatedDownload, err := h.componentReportRepo.GetDownloadByID(c.Request.Context(), orderID)
		if err == nil && updatedDownload != nil {
			download = updatedDownload
		}
	}

	// 返回支付状态
	canDownload := download.PaymentStatus == "success" && !download.IsExpired()

	c.JSON(http.StatusOK, CheckPaymentStatusResponse{
		OrderID:       download.ID,
		PaymentStatus: download.PaymentStatus,
		CanDownload:   canDownload,
	})
}

// detectPlatform 根据 User-Agent 检测支付平台类型
func (h *ComponentReportHandler) detectPlatform(userAgent string) string {
	if userAgent == "" {
		return "h5" // 默认 H5
	}

	ua := strings.ToLower(userAgent)

	// 检测移动设备
	if strings.Contains(ua, "mobile") || strings.Contains(ua, "android") ||
		strings.Contains(ua, "iphone") || strings.Contains(ua, "ipad") {
		// 检测是否是支付宝或微信内置浏览器
		if strings.Contains(ua, "alipay") {
			return "app" // 支付宝 APP
		}
		if strings.Contains(ua, "micromessenger") {
			return "h5" // 微信 H5
		}
		return "h5" // 移动端默认 H5
	}

	// PC 端
	return "pc"
}