package domain

import "time"

// User-recent-activity feed kinds (for timeline UI: icon + copy).
const (
	UserRecentActivityJoined            = "joined"
	UserRecentActivityLessonCompleted   = "lesson_completed"
	UserRecentActivityModuleCompleted   = "module_completed"
	UserRecentActivityCourseCompleted   = "course_completed"
	UserRecentActivityProgramCompleted  = "program_completed"
	UserRecentActivityPracticeCompleted = "practice_completed"
)

// UserRecentActivityFeed is a reverse-chronological list of notable user events (account + LMS completions).
type UserRecentActivityFeed struct {
	UserID int64                    `json:"user_id"`
	Items  []UserRecentActivityItem `json:"items"`
}

// UserRecentActivityItem is one row in a profile or admin "Recent activity" timeline.
type UserRecentActivityItem struct {
	ID string `json:"id"`

	// Kind drives default icon treatment on the client (e.g. joined vs completion).
	Kind string `json:"kind"`

	// OccurredAt is when the platform recorded the event (typically completion time).
	OccurredAt time.Time `json:"occurred_at"`

	// Headline is optional server-rendered primary line (client may ignore and build from refs).
	Headline string `json:"headline"`

	Program  *RecentActivityProgramRef  `json:"program,omitempty"`
	Course   *RecentActivityCourseRef   `json:"course,omitempty"`
	Module   *RecentActivityModuleRef   `json:"module,omitempty"`
	Lesson   *RecentActivityLessonRef   `json:"lesson,omitempty"`
	Practice *RecentActivityPracticeRef `json:"practice,omitempty"`
}

type RecentActivityProgramRef struct {
	ID   int64  `json:"id"`
	Name string `json:"name"`
}

type RecentActivityCourseRef struct {
	ID   int64  `json:"id"`
	Name string `json:"name"`
}

type RecentActivityModuleRef struct {
	ID        int64  `json:"id"`
	Name      string `json:"name"`
	SortOrder int32  `json:"sort_order"`
}

type RecentActivityLessonRef struct {
	ID        int64  `json:"id"`
	Title     string `json:"title"`
	SortOrder int32  `json:"sort_order,omitempty"`
}

type RecentActivityPracticeRef struct {
	LMSPracticeID int64  `json:"lms_practice_id"`
	Title         string `json:"title"`
	Scope         string `json:"scope"` // lesson | module | course
}