package controller

import (
	"context"
	"net/http"
	"strconv"
	"time"

	"dubbo.apache.org/dubbo-go/v3/client"
	"dubbo.apache.org/dubbo-go/v3/common/constant"
	"github.com/gin-gonic/gin"
	"github.com/topfans/backend/gateway/pkg/response"
	"github.com/topfans/backend/pkg/logger"
	pb "github.com/topfans/backend/pkg/proto/statistic"
	"go.uber.org/zap"
)

// StatisticController 数据看板 HTTP controller（gateway → statisticService 7 RPC）
type StatisticController struct {
	statisticService pb.StatisticService
}

// NewStatisticController 构造
func NewStatisticController(dubboClient *client.Client) (*StatisticController, error) {
	svc, err := pb.NewStatisticService(dubboClient)
	if err != nil {
		return nil, err
	}
	return &StatisticController{statisticService: svc}, nil
}

// parseStarID 解析 query 中的 star_id
func parseStarID(c *gin.Context) (int64, bool) {
	v := c.Query("star_id")
	if v == "" {
		response.Error(c, http.StatusBadRequest, "star_id 是必填参数")
		return 0, false
	}
	n, err := strconv.ParseInt(v, 10, 64)
	if err != nil {
		response.Error(c, http.StatusBadRequest, "star_id 参数错误")
		return 0, false
	}
	return n, true
}

// buildCtx 构造带 user_id 透传的 ctx（Dubbo attachment）
func buildCtx(c *gin.Context) context.Context {
	ctx, cancel := context.WithTimeout(c.Request.Context(), 5*time.Second)
	_ = cancel
	userID, _ := c.Get("user_id")
	if userID != nil {
		ctx = context.WithValue(ctx, constant.AttachmentKey, map[string]interface{}{
			"user_id": strconv.FormatInt(toInt64(userID), 10),
		})
	}
	return ctx
}

func toInt64(v interface{}) int64 {
	switch x := v.(type) {
	case int64:
		return x
	case int:
		return int64(x)
	case string:
		n, _ := strconv.ParseInt(x, 10, 64)
		return n
	}
	return 0
}

// ===== 1. 今日概览 =====
func (ctrl *StatisticController) GetTodayOverview(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	logger.Logger.Info("GetTodayOverview", zap.Int64("star_id", starID))
	resp, err := ctrl.statisticService.GetTodayOverview(buildCtx(c), &pb.GetTodayOverviewRequest{StarId: starID})
	if err != nil {
		logger.Logger.Error("GetTodayOverview RPC failed", zap.Error(err))
		response.Error(c, http.StatusInternalServerError, "获取今日概览失败")
		return
	}
	response.Success(c, resp)
}

// ===== 2. 七日收益曲线 =====
func (ctrl *StatisticController) Get7DayIncomeCurve(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.Get7DayIncomeCurve(buildCtx(c), &pb.Get7DayIncomeCurveRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取七日收益曲线失败")
		return
	}
	response.Success(c, resp)
}

// ===== 3. 展出收益中心 =====
func (ctrl *StatisticController) GetExhibitionIncomeSummary(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.GetExhibitionIncomeSummary(buildCtx(c), &pb.GetExhibitionIncomeSummaryRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取展出收益中心失败")
		return
	}
	response.Success(c, resp)
}

// ===== 4. 点赞收益按等级 =====
func (ctrl *StatisticController) GetLikeIncomeByLevel(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.GetLikeIncomeByLevel(buildCtx(c), &pb.GetLikeIncomeByLevelRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取点赞等级收益失败")
		return
	}
	response.Success(c, resp)
}

// ===== 5. 藏品 TOP5 =====
func (ctrl *StatisticController) GetTopAssets(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.GetTopAssetsByEarning(buildCtx(c), &pb.GetTopAssetsByEarningRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取藏品 TOP5 失败")
		return
	}
	response.Success(c, resp)
}

// ===== 6. 藏品等级分布 =====
func (ctrl *StatisticController) GetLevelDistribution(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.GetAssetLevelDistribution(buildCtx(c), &pb.GetAssetLevelDistributionRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取等级分布失败")
		return
	}
	response.Success(c, resp)
}

// ===== 7. 升级进度 =====
func (ctrl *StatisticController) GetUpgradeProgress(c *gin.Context) {
	starID, ok := parseStarID(c)
	if !ok {
		return
	}
	resp, err := ctrl.statisticService.GetAssetUpgradeProgress(buildCtx(c), &pb.GetAssetUpgradeProgressRequest{StarId: starID})
	if err != nil {
		response.Error(c, http.StatusInternalServerError, "获取升级进度失败")
		return
	}
	response.Success(c, resp)
}