package handler

import (
	"time"

	"github.com/gin-gonic/gin"

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

type reminderReq struct {
	Type        string `json:"type"`
	Title       string `json:"title"`
	NextDueDate string `json:"next_due_date"` // YYYY-MM-DD
	Frequency   string `json:"frequency"`
}

// ListReminders GET /api/pets/:id/reminders
func (h *Handler) ListReminders(c *gin.Context) {
	reminders, err := h.svc.ListReminders(middleware.UserID(c), uintParam(c, "id"))
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, reminders)
}

// CreateReminder POST /api/pets/:id/reminders
func (h *Handler) CreateReminder(c *gin.Context) {
	var req reminderReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	in := service.ReminderInput{Type: req.Type, Title: req.Title, Frequency: req.Frequency}
	if req.NextDueDate != "" {
		if t, err := time.Parse("2006-01-02", req.NextDueDate); err == nil {
			in.NextDueDate = &t
		}
	}
	r, err := h.svc.CreateReminder(middleware.UserID(c), uintParam(c, "id"), in)
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, r)
}

// UpdateReminder PUT /api/reminders/:id
func (h *Handler) UpdateReminder(c *gin.Context) {
	var req reminderReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.FailParams(c, err.Error())
		return
	}
	fields := map[string]any{}
	if req.Title != "" {
		fields["title"] = req.Title
	}
	if req.Frequency != "" {
		fields["frequency"] = req.Frequency
	}
	if req.NextDueDate != "" {
		if t, err := time.Parse("2006-01-02", req.NextDueDate); err == nil {
			fields["next_due_date"] = t
		}
	}
	r, err := h.svc.UpdateReminder(middleware.UserID(c), uintParam(c, "id"), fields)
	if err != nil {
		respondErr(c, err)
		return
	}
	response.OK(c, r)
}

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