package domain

import "time"

// Program is the top-level container in the LMS hierarchy (e.g. tracks like Beginner / Intermediate / Advanced).
type Program struct {
	ID            int64                `json:"id"`
	Name          string               `json:"name"`
	Description   *string              `json:"description,omitempty"`
	Category      string               `json:"category"`
	Thumbnail     *string              `json:"thumbnail,omitempty"`
	SortOrder     int                  `json:"sort_order"`
	PublishStatus ContentPublishStatus `json:"publish_status"`
	CreatedAt     time.Time            `json:"created_at"`
	UpdatedAt     *time.Time           `json:"updated_at,omitempty"`
	Access        *LMSEntityAccess     `json:"access,omitempty"`
}

// VisibleToLearners is true when the program appears in subscriber/catalog LMS APIs.
func (p Program) VisibleToLearners() bool {
	return p.PublishStatus == ContentPublishPublished
}

type CreateProgramInput struct {
	Name        string  `json:"name" validate:"required"`
	Description *string `json:"description,omitempty"`
	Category    string  `json:"category" validate:"required,oneof=LEARN_ENGLISH IELTS DUOLINGO"`
	Thumbnail   *string `json:"thumbnail,omitempty"`
	// SortOrder inserts at this global program order when set; omit to append after current max (sort_order uniqueness is enforced).
	SortOrder *int `json:"sort_order,omitempty" validate:"omitempty,min=0"`
	// Omit or empty defaults to DRAFT; set PUBLISHED to make visible to learners immediately.
	PublishStatus *string `json:"publish_status,omitempty" validate:"omitempty,oneof=DRAFT draft PUBLISHED published"`
}

type UpdateProgramInput struct {
	Name          *string `json:"name,omitempty"`
	Description   *string `json:"description,omitempty"`
	Category      *string `json:"category,omitempty" validate:"omitempty,oneof=LEARN_ENGLISH IELTS DUOLINGO"`
	Thumbnail     *string `json:"thumbnail,omitempty"`
	SortOrder     *int    `json:"sort_order,omitempty"`
	PublishStatus *string `json:"publish_status,omitempty" validate:"omitempty,oneof=DRAFT draft PUBLISHED published"`
}