package v1

import (
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/dto"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/middleware"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/service"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/app"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/errcode"
	"github.com/gin-gonic/gin"
)

// AIRecommendHandler AI 穿搭推荐相关接口。
type AIRecommendHandler struct {
	svc *service.AIRecommendService
}

// NewAIRecommendHandler 创建 AI 推荐 handler。
func NewAIRecommendHandler() *AIRecommendHandler {
	return &AIRecommendHandler{svc: service.NewAIRecommendService()}
}

// Submit 提交 AI 穿搭推荐任务（异步）。
// 立即返回 task_id，不等待大模型；生成在前端断开后仍会继续，结果通过 Status 轮询获取。
func (h *AIRecommendHandler) Submit(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.AIRecommendCreateRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.Submit(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Status 查询 AI 穿搭推荐任务的状态与结果。
func (h *AIRecommendHandler) Status(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.AIRecommendStatusRequest
	if err := c.ShouldBindQuery(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.Status(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Save 保存 AI 推荐穿搭到我的搭配。
func (h *AIRecommendHandler) Save(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.AIRecommendSaveRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	if e := h.svc.Save(c.Request.Context(), userID, &request); e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(nil)
}