package domain

import "time"

type AnalyticsLabelCount struct {
	Label string `json:"label"`
	Count int64  `json:"count"`
}

type AnalyticsLabelAmount struct {
	Label  string  `json:"label"`
	Count  int64   `json:"count"`
	Amount float64 `json:"amount"`
}

type AnalyticsRevenueByPlan struct {
	PlanName string  `json:"plan_name"`
	Currency string  `json:"currency"`
	Revenue  float64 `json:"revenue"`
}

type AnalyticsTimePoint struct {
	Date  time.Time `json:"date"`
	Count int64     `json:"count"`
}

type AnalyticsRevenueTimePoint struct {
	Date    time.Time `json:"date"`
	Revenue float64   `json:"revenue"`
}

// AnalyticsMonthlyRevenuePoint is one calendar month bucket (UTC month start) within a dashboard year query.
type AnalyticsMonthlyRevenuePoint struct {
	Month      int       `json:"month"`       // 1–12
	MonthStart time.Time `json:"month_start"` // UTC date of month start (for sorting / tooltips)
	Label      string    `json:"label"`       // Short English month label, e.g. Jan
	Currency   string    `json:"currency"`
	Revenue    float64   `json:"revenue"` // SUCCESS payments aggregate for that bucket
}

type AnalyticsUsersSection struct {
	TotalUsers int64 `json:"total_users"`
	NewToday   int64 `json:"new_today"`
	NewWeek    int64 `json:"new_week"`
	NewMonth   int64 `json:"new_month"`

	ByRole              []AnalyticsLabelCount `json:"by_role"`
	ByStatus            []AnalyticsLabelCount `json:"by_status"`
	ByAgeGroup          []AnalyticsLabelCount `json:"by_age_group"`
	ByEducationLevel    []AnalyticsLabelCount `json:"by_education_level"`
	ByOccupation        []AnalyticsLabelCount `json:"by_occupation"`
	ByLearningGoal      []AnalyticsLabelCount `json:"by_learning_goal"`
	ByLanguageChallange []AnalyticsLabelCount `json:"by_language_challange"`
	ByKnowledgeLevel    []AnalyticsLabelCount `json:"by_knowledge_level"`
	ByRegion            []AnalyticsLabelCount `json:"by_region"`

	RegistrationsLast30Days []AnalyticsTimePoint `json:"registrations_last_30_days"`
}

type AnalyticsSubscriptionsSection struct {
	TotalSubscriptions  int64 `json:"total_subscriptions"`
	ActiveSubscriptions int64 `json:"active_subscriptions"`
	NewToday            int64 `json:"new_today"`
	NewWeek             int64 `json:"new_week"`
	NewMonth            int64 `json:"new_month"`

	ByStatus      []AnalyticsLabelCount    `json:"by_status"`
	RevenueByPlan []AnalyticsRevenueByPlan `json:"revenue_by_plan"`

	NewSubscriptionsLast30Days []AnalyticsTimePoint `json:"new_subscriptions_last_30_days"`
}

type AnalyticsPaymentsSection struct {
	TotalRevenue        float64 `json:"total_revenue"`
	AvgTransactionValue float64 `json:"avg_transaction_value"`
	TotalPayments       int64   `json:"total_payments"`
	SuccessfulPayments  int64   `json:"successful_payments"`

	ByStatus []AnalyticsLabelAmount `json:"by_status"`
	ByMethod []AnalyticsLabelAmount `json:"by_method"`

	RevenueLast30Days []AnalyticsRevenueTimePoint `json:"revenue_last_30_days"`

	// RevenueMonthly is populated only when the request includes year=..., with 12 months (possibly multiple currencies per month).
	RevenueMonthly []AnalyticsMonthlyRevenuePoint `json:"revenue_monthly,omitempty"`
	// MonthlyRevenueYear is set when RevenueMonthly is non-empty (the calendar year of those buckets).
	MonthlyRevenueYear *int `json:"monthly_revenue_year,omitempty"`
}

// AnalyticsLMSContentCounts reflects the LMS hierarchy (Learn English): programs → courses → modules → lessons.
type AnalyticsLMSContentCounts struct {
	Programs          int64 `json:"programs"`
	Courses           int64 `json:"courses"`
	Modules           int64 `json:"modules"`
	Lessons           int64 `json:"lessons"`
	LessonsWithVideo  int64 `json:"lessons_with_video"`
	Practices         int64 `json:"practices"`
	PracticesAtCourse int64 `json:"practices_at_course"`
	PracticesAtModule int64 `json:"practices_at_module"`
	PracticesAtLesson int64 `json:"practices_at_lesson"`
}

// AnalyticsExamPrepContentCounts reflects the exam_prep schema: catalog_courses → units → unit_modules → lessons → lesson_practices.
type AnalyticsExamPrepContentCounts struct {
	CatalogCourses   int64 `json:"catalog_courses"`
	Units            int64 `json:"units"`
	UnitModules      int64 `json:"unit_modules"`
	Lessons          int64 `json:"lessons"`
	LessonsWithVideo int64 `json:"lessons_with_video"`
	LessonPractices  int64 `json:"lesson_practices"`
}

type AnalyticsCoursesSection struct {
	// Top-level keys preserved for existing clients: map to LMS programs, courses, modules, and all video lessons (LMS + exam prep).
	TotalCategories int64 `json:"total_categories"`
	TotalCourses    int64 `json:"total_courses"`
	TotalSubCourses int64 `json:"total_sub_courses"`
	TotalVideos     int64 `json:"total_videos"`

	LMS      AnalyticsLMSContentCounts      `json:"lms"`
	ExamPrep AnalyticsExamPrepContentCounts `json:"exam_prep"`
}

type AnalyticsContentSection struct {
	TotalQuestions    int64 `json:"total_questions"`
	TotalQuestionSets int64 `json:"total_question_sets"`

	QuestionsByType    []AnalyticsLabelCount `json:"questions_by_type"`
	QuestionSetsByType []AnalyticsLabelCount `json:"question_sets_by_type"`
}

type AnalyticsNotificationsSection struct {
	TotalSent   int64 `json:"total_sent"`
	ReadCount   int64 `json:"read_count"`
	UnreadCount int64 `json:"unread_count"`

	ByChannel []AnalyticsLabelCount `json:"by_channel"`
	ByType    []AnalyticsLabelCount `json:"by_type"`
}

type AnalyticsIssuesSection struct {
	TotalIssues    int64   `json:"total_issues"`
	ResolvedIssues int64   `json:"resolved_issues"`
	ResolutionRate float64 `json:"resolution_rate"`

	ByStatus []AnalyticsLabelCount `json:"by_status"`
	ByType   []AnalyticsLabelCount `json:"by_type"`
}

type AnalyticsTeamSection struct {
	TotalMembers int64                 `json:"total_members"`
	ByRole       []AnalyticsLabelCount `json:"by_role"`
	ByStatus     []AnalyticsLabelCount `json:"by_status"`
}

type AnalyticsDashboard struct {
	GeneratedAt   time.Time                     `json:"generated_at"`
	DateFilter    AnalyticsDateFilter           `json:"date_filter"`
	Users         AnalyticsUsersSection         `json:"users"`
	Subscriptions AnalyticsSubscriptionsSection `json:"subscriptions"`
	Payments      AnalyticsPaymentsSection      `json:"payments"`
	Courses       AnalyticsCoursesSection       `json:"courses"`
	Content       AnalyticsContentSection       `json:"content"`
	Notifications AnalyticsNotificationsSection `json:"notifications"`
	Issues        AnalyticsIssuesSection        `json:"issues"`
	Team          AnalyticsTeamSection          `json:"team"`
}