package handler

import (
	"time"

	"github.com/gin-gonic/gin"
	"gorm.io/datatypes"

	"github.com/sundynix/pets-be/internal/middleware"
	"github.com/sundynix/pets-be/internal/service"
	"github.com/sundynix/pets-be/pkg/response"
)

type recordReq struct {
	Type        string         `json:"type"`
	Icon        string         `json:"icon"`
	Title       string         `json:"title"`
	Description string         `json:"description"`
	NumValue    float64        `json:"num_value"`
	Category    string         `json:"category"`
	ImageURL    string         `json:"image_url"`
	ImageFileID string         `json:"image_file_id"`
	Extra       datatypes.JSON `json:"extra"`
	OccurredAt  string         `json:"occurred_at"`
}

// ListRecords GET /api/pets/:id/records?type=
func (h *Handler) ListRecords(c *gin.Context) {
	var pq response.PageQuery
	_ = c.ShouldBindQuery(&pq)
	pq.Normalize()
	records, total, err := h.svc.ListRecords(middleware.UserID(c), idParam(c, "id"), c.Query("type"), pq.Offset(), pq.Limit())
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, response.NewPage(records, total, pq))
}

// CreateRecord POST /api/pets/:id/records
func (h *Handler) CreateRecord(c *gin.Context) {
	var req recordReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	in := service.RecordInput{
		Type: req.Type, Icon: req.Icon, Title: req.Title, Description: req.Description,
		NumValue: req.NumValue, Category: req.Category, ImageURL: req.ImageURL, ImageFileID: req.ImageFileID, Extra: req.Extra,
	}
	if req.OccurredAt != "" {
		if t, err := time.Parse(time.RFC3339, req.OccurredAt); err == nil {
			in.OccurredAt = &t
		}
	}
	rec, err := h.svc.CreateRecord(middleware.UserID(c), idParam(c, "id"), in)
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, rec)
}

// DeleteRecord DELETE /api/records/:id
func (h *Handler) DeleteRecord(c *gin.Context) {
	if err := h.svc.DeleteRecord(middleware.UserID(c), idParam(c, "id")); err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, gin.H{"deleted": true})
}

// WeightTrend GET /api/pets/:id/records/weight-trend
func (h *Handler) WeightTrend(c *gin.Context) {
	points, err := h.svc.WeightTrend(middleware.UserID(c), idParam(c, "id"), 7)
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, points)
}

// PetInsights GET /api/pets/:id/insights
// 把散落的记录变成结论：体重趋势、换粮与软便的关联、异常扎堆、逾期提醒、同龄对比。
func (h *Handler) PetInsights(c *gin.Context) {
	list, err := h.svc.PetInsights(middleware.UserID(c), idParam(c, "id"))
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, list)
}