package repository

import (
	"context"

	"bugulma/backend/internal/domain"

	"gorm.io/gorm"
)

// ActivityLogRepository implements domain.ActivityLogRepository with GORM
type ActivityLogRepository struct {
	*BaseRepository[domain.ActivityLog]
	db *gorm.DB
}

// NewActivityLogRepository creates a new GORM-based activity log repository
func NewActivityLogRepository(db *gorm.DB) domain.ActivityLogRepository {
	return &ActivityLogRepository{
		BaseRepository: NewBaseRepository[domain.ActivityLog](db),
		db:             db,
	}
}

// GetByUser retrieves activity logs for a user with pagination
func (r *ActivityLogRepository) GetByUser(ctx context.Context, userID string, limit, offset int) ([]*domain.ActivityLog, int64, error) {
	var activities []*domain.ActivityLog
	var total int64

	// Get total count
	if err := r.db.WithContext(ctx).
		Model(&domain.ActivityLog{}).
		Where("user_id = ?", userID).
		Count(&total).Error; err != nil {
		return nil, 0, err
	}

	// Get paginated results
	result := r.db.WithContext(ctx).
		Where("user_id = ?", userID).
		Order("timestamp DESC").
		Limit(limit).
		Offset(offset).
		Find(&activities)
	if result.Error != nil {
		return nil, 0, result.Error
	}

	return activities, total, nil
}

// GetByTarget retrieves activity logs for a target entity with pagination
func (r *ActivityLogRepository) GetByTarget(ctx context.Context, targetType, targetID string, limit, offset int) ([]*domain.ActivityLog, int64, error) {
	var activities []*domain.ActivityLog
	var total int64

	// Get total count
	if err := r.db.WithContext(ctx).
		Model(&domain.ActivityLog{}).
		Where("target_type = ? AND target_id = ?", targetType, targetID).
		Count(&total).Error; err != nil {
		return nil, 0, err
	}

	// Get paginated results
	result := r.db.WithContext(ctx).
		Where("target_type = ? AND target_id = ?", targetType, targetID).
		Order("timestamp DESC").
		Limit(limit).
		Offset(offset).
		Find(&activities)
	if result.Error != nil {
		return nil, 0, result.Error
	}

	return activities, total, nil
}

// GetRecent retrieves recent activity logs
func (r *ActivityLogRepository) GetRecent(ctx context.Context, limit int) ([]*domain.ActivityLog, error) {
	var activities []*domain.ActivityLog
	result := r.db.WithContext(ctx).
		Order("timestamp DESC").
		Limit(limit).
		Find(&activities)
	if result.Error != nil {
		return nil, result.Error
	}
	return activities, nil
}

// GetByAction retrieves activity logs by action type with pagination
func (r *ActivityLogRepository) GetByAction(ctx context.Context, action domain.ActivityAction, limit, offset int) ([]*domain.ActivityLog, int64, error) {
	var activities []*domain.ActivityLog
	var total int64

	// Get total count
	if err := r.db.WithContext(ctx).
		Model(&domain.ActivityLog{}).
		Where("action = ?", action).
		Count(&total).Error; err != nil {
		return nil, 0, err
	}

	// Get paginated results
	result := r.db.WithContext(ctx).
		Where("action = ?", action).
		Order("timestamp DESC").
		Limit(limit).
		Offset(offset).
		Find(&activities)
	if result.Error != nil {
		return nil, 0, result.Error
	}

	return activities, total, nil
}