package domain

import "time"

// ParentKind identifies which hierarchy entity owns a practice (exactly one).
type ParentKind string

const (
	ParentKindCourse ParentKind = "COURSE"
	ParentKindModule ParentKind = "MODULE"
	ParentKindLesson ParentKind = "LESSON"
)

// Practice is question-set content (story, persona, tips) scoped to a course, module, or lesson.
type Practice struct {
	ID                 int64      `json:"id"`
	ParentKind         ParentKind `json:"parent_kind"`
	ParentID           int64      `json:"parent_id"`
	Title              string     `json:"title"`
	StoryDescription   *string    `json:"story_description,omitempty"`
	StoryImage         *string    `json:"story_image,omitempty"`
	PersonaID          *int64     `json:"persona_id,omitempty"`
	QuestionSetID      int64      `json:"question_set_id"`
	QuickTips          *string    `json:"quick_tips,omitempty"`
	CreatedAt          time.Time  `json:"created_at"`
	UpdatedAt          *time.Time `json:"updated_at,omitempty"`
}

type CreatePracticeInput struct {
	ParentKind       ParentKind `json:"parent_kind" validate:"required,oneof=COURSE MODULE LESSON"`
	ParentID         int64      `json:"parent_id" validate:"required,gt=0"`
	Title            string     `json:"title" validate:"required"`
	StoryDescription *string    `json:"story_description,omitempty"`
	StoryImage       *string    `json:"story_image,omitempty"`
	PersonaID        *int64     `json:"persona_id,omitempty"`
	QuestionSetID    int64      `json:"question_set_id" validate:"required,gt=0"`
	QuickTips        *string    `json:"quick_tips,omitempty"`
}

type UpdatePracticeInput struct {
	Title            *string `json:"title,omitempty"`
	StoryDescription *string `json:"story_description,omitempty"`
	StoryImage       *string `json:"story_image,omitempty"`
	PersonaID        *int64  `json:"persona_id,omitempty"`
	QuestionSetID    *int64  `json:"question_set_id,omitempty"`
	QuickTips        *string `json:"quick_tips,omitempty"`
}