package handler

import (
	"errors"
	"io"
	"net/http"
	"strings"
	"time"

	"github.com/gin-gonic/gin"

	"wx_service/internal/middleware"
	"wx_service/internal/model"
	smokeservice "wx_service/internal/smoke/service"
)

type upsertSmokeProfileRequest struct {
	BaselineCigsPerDay *int     `json:"baseline_cigs_per_day"`
	SmokingYears       *float64 `json:"smoking_years"`
	PackPriceCent      *int     `json:"pack_price_cent"`
	Mode               *string  `json:"mode"`

	SmokeMotivations *[]string `json:"smoke_motivations"`
	QuitMotivations  *[]string `json:"quit_motivations"`

	WakeUpTime *string `json:"wake_up_time"`
	SleepTime  *string `json:"sleep_time"`

	QuitDate *string `json:"quit_date"`

	AchievementThemeID *uint `json:"achievement_theme_id"`
}

func (h *SmokeHandler) GetProfile(c *gin.Context) {
	user := middleware.MustCurrentUser(c)

	view, err := h.smokeProfileService.GetView(c.Request.Context(), int(user.ID))
	if err != nil {
		if errors.Is(err, smokeservice.ErrSmokeProfileInvalidTime) {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "作息时间格式错误，应为 HH:MM"))
			return
		}
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "获取基础信息失败，请稍后重试"))
		return
	}

	c.JSON(http.StatusOK, model.Success(view))
}

func (h *SmokeHandler) UpsertProfile(c *gin.Context) {
	user := middleware.MustCurrentUser(c)

	var req upsertSmokeProfileRequest
	if err := c.ShouldBindJSON(&req); err != nil && !errors.Is(err, io.EOF) {
		c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "请求参数错误"))
		return
	}

	if req.BaselineCigsPerDay != nil {
		if *req.BaselineCigsPerDay < 0 || *req.BaselineCigsPerDay > 300 {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "baseline_cigs_per_day 应在 0~300"))
			return
		}
	}
	if req.SmokingYears != nil {
		if *req.SmokingYears < 0 || *req.SmokingYears > 80 {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "smoking_years 应在 0~80"))
			return
		}
	}
	if req.PackPriceCent != nil {
		if *req.PackPriceCent < 0 || *req.PackPriceCent > 1000000 {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "pack_price_cent 应在 0~1000000"))
			return
		}
	}
	if req.Mode != nil {
		mode := strings.TrimSpace(*req.Mode)
		if mode != "" && mode != smokeservice.SmokeModeQuit && mode != smokeservice.SmokeModeRecord {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "mode 仅支持 quit 或 record"))
			return
		}
	}

	quitDateProvided := false
	var quitDate *time.Time
	if req.QuitDate != nil {
		quitDateProvided = true
		value := strings.TrimSpace(*req.QuitDate)
		if value != "" {
			parsed, err := time.ParseInLocation(dateLayout, value, time.Local)
			if err != nil {
				c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "quit_date 格式错误，应为 YYYY-MM-DD"))
				return
			}
			quitDate = &parsed
		}
	}

	achievementThemeIDProvided := req.AchievementThemeID != nil

	view, err := h.smokeProfileService.Upsert(c.Request.Context(), int(user.ID), smokeservice.UpsertSmokeProfileRequest{
		BaselineCigsPerDay:        req.BaselineCigsPerDay,
		SmokingYears:              req.SmokingYears,
		PackPriceCent:             req.PackPriceCent,
		Mode:                      req.Mode,
		SmokeMotivations:          req.SmokeMotivations,
		QuitMotivations:           req.QuitMotivations,
		WakeUpTime:                req.WakeUpTime,
		SleepTime:                 req.SleepTime,
		QuitDateProvided:          quitDateProvided,
		QuitDate:                  quitDate,
		AchievementThemeIDProvided: achievementThemeIDProvided,
		AchievementThemeID:         req.AchievementThemeID,
	})
	if err != nil {
		if errors.Is(err, smokeservice.ErrSmokeProfileInvalidTime) {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "作息时间格式错误，应为 HH:MM"))
			return
		}
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "保存基础信息失败，请稍后重试"))
		return
	}

	c.JSON(http.StatusOK, model.Success(view))
}