package handler

import (
	"net/http"
	"time"

	"github.com/gin-gonic/gin"

	"github.com/yuxingu/digital-psychology/apps/api/internal/middleware"
	companionsvc "github.com/yuxingu/digital-psychology/apps/api/internal/service/companion"
	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
)

// CompanionHandler exposes solar terms and moods.
type CompanionHandler struct {
	Svc *companionsvc.Service
}

// Register mounts companion routes.
func (h *CompanionHandler) Register(rg *gin.RouterGroup) {
	rg.GET("/solar-terms/today", h.TodaySolar)
	rg.POST("/moods", h.SaveMood)
	rg.GET("/moods/today", h.TodayMood)
}

// TodaySolar handles GET /solar-terms/today (auth optional via group).
func (h *CompanionHandler) TodaySolar(c *gin.Context) {
	response.OK(c, h.Svc.TodaySolar())
}

// SaveMood handles POST /moods.
func (h *CompanionHandler) SaveMood(c *gin.Context) {
	userID, ok := middleware.UserIDFromContext(c)
	if !ok {
		response.Fail(c, http.StatusUnauthorized, 40100, "unauthorized")
		return
	}
	var req struct {
		Score *int    `json:"score"`
		Note  *string `json:"note"`
		Day   *string `json:"day"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Fail(c, http.StatusBadRequest, 10000, "invalid request")
		return
	}
	in := companionsvc.SaveMoodInput{Score: req.Score, Note: req.Note}
	if req.Day != nil && *req.Day != "" {
		d, err := time.Parse("2006-01-02", *req.Day)
		if err != nil {
			response.Fail(c, http.StatusBadRequest, 10000, "invalid day")
			return
		}
		in.Day = &d
	}
	m, err := h.Svc.SaveMood(c.Request.Context(), userID, in)
	if err != nil {
		response.Fail(c, http.StatusBadRequest, 30010, err.Error())
		return
	}
	response.OK(c, m)
}

// TodayMood handles GET /moods/today.
func (h *CompanionHandler) TodayMood(c *gin.Context) {
	userID, ok := middleware.UserIDFromContext(c)
	if !ok {
		response.Fail(c, http.StatusUnauthorized, 40100, "unauthorized")
		return
	}
	m, err := h.Svc.GetTodayMood(c.Request.Context(), userID)
	if err != nil {
		response.Fail(c, http.StatusInternalServerError, 50000, err.Error())
		return
	}
	response.OK(c, gin.H{"mood": m})
}