package handlers

import (
	"io"

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

	"tyapi-server/internal/application/certification"
	"tyapi-server/internal/application/certification/dto/commands"
	"tyapi-server/internal/application/certification/dto/queries"
	"tyapi-server/internal/shared/interfaces"
)

// CertificationHandler 认证处理器
type CertificationHandler struct {
	appService certification.CertificationApplicationService
	response   interfaces.ResponseBuilder
	logger     *zap.Logger
}

// NewCertificationHandler 创建认证处理器
func NewCertificationHandler(
	appService certification.CertificationApplicationService,
	response interfaces.ResponseBuilder,
	logger *zap.Logger,
) *CertificationHandler {
	return &CertificationHandler{
		appService: appService,
		response:   response,
		logger:     logger,
	}
}

// CreateCertification 创建认证申请
// @Summary 创建认证申请
// @Description 为用户创建新的企业认证申请
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} responses.CertificationResponse "认证申请创建成功"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification [post]
func (h *CertificationHandler) CreateCertification(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	cmd := &commands.CreateCertificationCommand{UserID: userID}
	result, err := h.appService.CreateCertification(c.Request.Context(), cmd)
	if err != nil {
		h.logger.Error("创建认证申请失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.InternalError(c, "创建认证申请失败")
		return
	}

	h.response.Success(c, result, "认证申请创建成功")
}

// UploadBusinessLicense 上传营业执照并同步OCR识别
// @Summary 上传营业执照并同步OCR识别
// @Description 上传营业执照文件，立即进行OCR识别并返回结果
// @Tags 企业认证
// @Accept multipart/form-data
// @Produce json
// @Param file formData file true "营业执照文件"
// @Security Bearer
// @Success 200 {object} responses.UploadLicenseResponse "上传成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未授权"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/upload-license [post]
func (h *CertificationHandler) UploadBusinessLicense(c *gin.Context) {
	// 获取当前用户ID
	userID, exists := c.Get("user_id")
	if !exists {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	// 获取上传的文件
	file, err := c.FormFile("file")
	if err != nil {
		h.response.BadRequest(c, "文件上传失败")
		return
	}

	// 读取文件内容
	openedFile, err := file.Open()
	if err != nil {
		h.response.BadRequest(c, "无法读取文件")
		return
	}
	defer openedFile.Close()

	fileBytes, err := io.ReadAll(openedFile)
	if err != nil {
		h.response.BadRequest(c, "文件读取失败")
		return
	}

	// 调用应用服务
	response, err := h.appService.UploadBusinessLicense(c.Request.Context(), userID.(string), fileBytes, file.Filename)
	if err != nil {
		h.logger.Error("营业执照上传失败", zap.Error(err))
		h.response.InternalError(c, "营业执照上传失败")
		return
	}

	h.response.Success(c, response, "营业执照上传成功")
}

// GetCertificationStatus 获取认证状态
// @Summary 获取认证状态
// @Description 获取当前用户的认证申请状态
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} responses.CertificationResponse "获取认证状态成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/status [get]
func (h *CertificationHandler) GetCertificationStatus(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	query := &queries.GetCertificationStatusQuery{UserID: userID}
	result, err := h.appService.GetCertificationStatus(c.Request.Context(), query)
	if err != nil {
		h.logger.Error("获取认证状态失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "获取认证状态成功")
}

// GetProgressStats 获取进度统计
// @Summary 获取进度统计
// @Description 获取认证申请的进度统计数据
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} map[string]interface{} "获取进度统计成功"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/stats [get]
func (h *CertificationHandler) GetProgressStats(c *gin.Context) {
	// 这里应该实现获取进度统计的逻辑
	// 暂时返回空数据
	h.response.Success(c, map[string]interface{}{
		"total_applications": 0,
		"pending":            0,
		"in_progress":        0,
		"completed":          0,
		"rejected":           0,
	}, "获取进度统计成功")
}

// GetCertificationProgress 获取认证进度
// @Summary 获取认证进度
// @Description 获取当前用户的认证申请详细进度信息
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} map[string]interface{} "获取认证进度成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 404 {object} map[string]interface{} "认证申请不存在"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/progress [get]
func (h *CertificationHandler) GetCertificationProgress(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	result, err := h.appService.GetCertificationProgress(c.Request.Context(), userID)
	if err != nil {
		h.logger.Error("获取认证进度失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "获取认证进度成功")
}

// SubmitEnterpriseInfo 提交企业信息
// @Summary 提交企业信息
// @Description 提交企业基本信息，包括企业名称、统一社会信用代码、法定代表人信息等
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body commands.SubmitEnterpriseInfoCommand true "企业信息"
// @Success 200 {object} responses.CertificationResponse "企业信息提交成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/enterprise-info [post]
func (h *CertificationHandler) SubmitEnterpriseInfo(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	var cmd commands.SubmitEnterpriseInfoCommand
	if err := c.ShouldBindJSON(&cmd); err != nil {
		h.logger.Error("参数绑定失败", zap.Error(err))
		h.response.BadRequest(c, "请求参数格式错误")
		return
	}

	cmd.UserID = userID

	result, err := h.appService.SubmitEnterpriseInfo(c.Request.Context(), &cmd)
	if err != nil {
		h.logger.Error("提交企业信息失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "企业信息提交成功")
}

// InitiateFaceVerify 发起人脸验证
// @Summary 发起人脸验证
// @Description 发起企业法人人脸验证流程
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body commands.InitiateFaceVerifyCommand true "人脸验证请求"
// @Success 200 {object} responses.FaceVerifyResponse "人脸验证发起成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/face-verify [post]
func (h *CertificationHandler) InitiateFaceVerify(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	var cmd commands.InitiateFaceVerifyCommand
	if err := c.ShouldBindJSON(&cmd); err != nil {
		h.logger.Error("参数绑定失败", zap.Error(err))
		h.response.BadRequest(c, "请求参数格式错误")
		return
	}

	// 根据用户ID获取认证申请
	query := &queries.GetCertificationStatusQuery{UserID: userID}
	certification, err := h.appService.GetCertificationStatus(c.Request.Context(), query)
	if err != nil {
		h.logger.Error("获取认证申请失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	// 如果用户没有认证申请，返回错误
	if certification.ID == "" {
		h.response.BadRequest(c, "用户尚未创建认证申请")
		return
	}

	cmd.CertificationID = certification.ID

	result, err := h.appService.InitiateFaceVerify(c.Request.Context(), &cmd)
	if err != nil {
		h.logger.Error("发起人脸验证失败",
			zap.String("certification_id", certification.ID),
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "人脸验证发起成功")
}

// ApplyContract 申请合同
// @Summary 申请合同
// @Description 申请企业认证合同
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} responses.CertificationResponse "合同申请成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/contract [post]
func (h *CertificationHandler) ApplyContract(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	result, err := h.appService.ApplyContract(c.Request.Context(), userID)
	if err != nil {
		h.logger.Error("申请合同失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "合同申请成功")
}

// GetCertificationDetails 获取认证详情
// @Summary 获取认证详情
// @Description 获取当前用户的认证申请详细信息
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Success 200 {object} responses.CertificationResponse "获取认证详情成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 404 {object} map[string]interface{} "认证申请不存在"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/details [get]
func (h *CertificationHandler) GetCertificationDetails(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	query := &queries.GetCertificationDetailsQuery{
		UserID: userID,
	}

	result, err := h.appService.GetCertificationDetails(c.Request.Context(), query)
	if err != nil {
		h.logger.Error("获取认证详情失败",
			zap.String("user_id", userID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "获取认证详情成功")
}

// RetryStep 重试步骤
// @Summary 重试认证步骤
// @Description 重新执行指定的认证步骤
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Param step path string true "步骤名称"
// @Success 200 {object} map[string]interface{} "步骤重试成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/retry/{step} [post]
func (h *CertificationHandler) RetryStep(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	step := c.Param("step")
	if step == "" {
		h.response.BadRequest(c, "步骤名称不能为空")
		return
	}

	var result interface{}
	var err error

	switch step {
	case "face_verify":
		result, err = h.appService.RetryFaceVerify(c.Request.Context(), userID)
	case "contract_sign":
		result, err = h.appService.RetryContractSign(c.Request.Context(), userID)
	default:
		h.response.BadRequest(c, "不支持的步骤类型")
		return
	}

	if err != nil {
		h.logger.Error("重试认证步骤失败",
			zap.String("user_id", userID),
			zap.String("step", step),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "认证步骤重试成功")
}

// GetLicenseOCRResult 获取营业执照OCR识别结果
// @Summary 获取营业执照OCR识别结果
// @Description 根据上传记录ID获取OCR识别结果
// @Tags 企业认证
// @Accept json
// @Produce json
// @Security Bearer
// @Param record_id path string true "上传记录ID"
// @Success 200 {object} responses.UploadLicenseResponse "获取OCR结果成功"
// @Failure 400 {object} map[string]interface{} "请求参数错误"
// @Failure 401 {object} map[string]interface{} "未认证"
// @Failure 404 {object} map[string]interface{} "记录不存在"
// @Failure 500 {object} map[string]interface{} "服务器内部错误"
// @Router /api/v1/certification/license/{record_id}/ocr-result [get]
func (h *CertificationHandler) GetLicenseOCRResult(c *gin.Context) {
	userID := c.GetString("user_id")
	if userID == "" {
		h.response.Unauthorized(c, "用户未认证")
		return
	}

	recordID := c.Param("record_id")
	if recordID == "" {
		h.response.BadRequest(c, "上传记录ID不能为空")
		return
	}

	result, err := h.appService.GetLicenseOCRResult(c.Request.Context(), recordID)
	if err != nil {
		h.logger.Error("获取OCR结果失败",
			zap.String("user_id", userID),
			zap.String("record_id", recordID),
			zap.Error(err),
		)
		h.response.BadRequest(c, err.Error())
		return
	}

	h.response.Success(c, result, "获取OCR结果成功")
}