package dto

import (
	"encoding/json"

	"carrot_bbs/internal/model"
)

func ConvertScheduleCourseToResponse(course *model.ScheduleCourse, weeks []int) *ScheduleCourseResponse {
	if course == nil {
		return nil
	}
	return &ScheduleCourseResponse{
		ID:           course.ID,
		Name:         course.Name,
		Teacher:      course.Teacher,
		Location:     course.Location,
		DayOfWeek:    course.DayOfWeek,
		StartSection: course.StartSection,
		EndSection:   course.EndSection,
		Weeks:        weeks,
		Color:        course.Color,
	}
}

func ParseWeeksJSON(raw string) []int {
	if raw == "" {
		return []int{}
	}
	var weeks []int
	if err := json.Unmarshal([]byte(raw), &weeks); err != nil {
		return []int{}
	}
	return weeks
}