package app

import (
	"strconv"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"
	"go.uber.org/zap"

	h5popupapp "github.com/break/junhong_cmp_fiber/internal/application/h5popup"
	"github.com/break/junhong_cmp_fiber/internal/handler/validation"
	"github.com/break/junhong_cmp_fiber/internal/middleware"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/logger"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// ClientPopupHandler 提供 H5 弹窗候选查询与风险换卡地址提交。
type ClientPopupHandler struct {
	candidates    *h5popupapp.CandidateService
	riskExchanges *h5popupapp.RiskExchangeService
	validate      *validator.Validate
}

// NewClientPopupHandler 创建 H5 弹窗 Handler。
func NewClientPopupHandler(candidates *h5popupapp.CandidateService, riskExchanges *h5popupapp.RiskExchangeService, validate *validator.Validate) *ClientPopupHandler {
	return &ClientPopupHandler{candidates: candidates, riskExchanges: riskExchanges, validate: validate}
}

// GetCandidates 查询当前页面与当前资产的弹窗候选。
// GET /api/c/v1/popup-candidates
// 该查询有副作用：命中时会创建或复用个人站内通知并保持未读，这是产品契约（不预生成通知），
// 客户端关闭或稍后处理时必须用返回的 notification_id 调用既有已读接口。
func (h *ClientPopupHandler) GetCandidates(c *fiber.Ctx) error {
	var request dto.PopupCandidateRequest
	if err := c.QueryParser(&request); err != nil {
		logPopupValidationFailure(c, "弹窗候选参数不合法", err)
		return errors.New(errors.CodeInvalidParam)
	}
	if h.validate != nil {
		if err := h.validate.Struct(&request); err != nil {
			logPopupValidationFailure(c, "弹窗候选参数不合法", err)
			return errors.New(errors.CodeInvalidParam, validation.Message("弹窗候选参数不合法", &request, err))
		}
	}
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	if h.candidates == nil {
		return errors.New(errors.CodeServiceUnavailable, "弹窗投放能力尚未配置")
	}
	result, err := h.candidates.GetCandidate(c.UserContext(), customerID, request)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// SubmitRiskAddress 提交风险换卡收货地址。
// POST /api/c/v1/risk-exchanges/:asset_id/address
// 重复提交返回首次创建的物流换货单与首次地址；首地址锁定，客户不能修改。
func (h *ClientPopupHandler) SubmitRiskAddress(c *fiber.Ctx) error {
	assetID, err := strconv.ParseUint(c.Params("asset_id"), 10, 64)
	if err != nil || assetID == 0 {
		return errors.New(errors.CodeInvalidParam, "风险换卡资产ID不合法")
	}
	var request dto.ClientRiskExchangeAddressParams
	if err := c.BodyParser(&request); err != nil {
		logPopupValidationFailure(c, "风险换卡地址参数不合法", err)
		return errors.New(errors.CodeInvalidParam)
	}
	// 路径来源字段必须由 Handler 回填后再校验，避免被请求体覆盖，也避免 required 恒失败。
	request.AssetID = uint(assetID)
	if h.validate != nil {
		if err := h.validate.Struct(&request); err != nil {
			logPopupValidationFailure(c, "风险换卡地址参数不合法", err)
			return errors.New(errors.CodeInvalidParam, validation.Message("风险换卡地址参数不合法", &request, err))
		}
	}
	customerID, ok := middleware.GetCustomerID(c)
	if !ok || customerID == 0 {
		return errors.New(errors.CodeUnauthorized)
	}
	if h.riskExchanges == nil {
		return errors.New(errors.CodeServiceUnavailable, "风险换卡能力尚未配置")
	}
	result, err := h.riskExchanges.Submit(c.UserContext(), customerID, uint(assetID), request)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// logPopupValidationFailure 记录参数校验失败，仅记录字段错误，不回显请求体内容。
func logPopupValidationFailure(c *fiber.Ctx, message string, err error) {
	logger.GetAppLogger().Warn("H5 弹窗接口参数验证失败",
		zap.String("method", c.Method()),
		zap.String("path", c.Path()),
		zap.String("message", message),
		zap.Error(err),
	)
}