erDiagram
    User ||--o{ Event : "creates"
    User ||--o{ EventManager : "is assigned as"
    User ||--o{ Guest : "can be linked to"
    User ||--o{ ActivityLog : "generates"
    User ||--o{ EmailTemplate : "creates"
    User {
        uuid id PK
        string email UK
        string password_hash
        string first_name
        string last_name
        string phone_number
        boolean is_active
        boolean is_superuser
        json preferences
        datetime created_at
        datetime updated_at
    }

    EventManager }o--|| Event : "manages"
    EventManager {
        uuid id PK
        uuid user_id FK
        uuid event_id FK
        uuid assigned_by FK
        enum role "OWNER/ADMIN/MODERATOR/VIEWER"
        boolean can_edit
        boolean can_invite
        boolean can_manage_gifts
        boolean can_send_updates
        boolean can_view_analytics
        datetime assigned_at
        datetime created_at
        datetime updated_at
    }

    Event ||--o{ Guest : "invites"
    Event ||--o{ GiftItem : "contains"
    Event ||--o{ EventMedia : "has"
    Event ||--o{ GiftCategory : "has"
    Event ||--o{ EmailTemplate : "has"
    Event ||--o{ NotificationLog : "generates"
    Event ||--o{ ActivityLog : "tracks"
    Event }o--|| EventTheme : "uses"
    Event {
        uuid id PK
        string title
        string slug UK
        string description
        string location_name
        string location_address
        string location_url
        datetime event_date
        time event_start_time
        time event_end_time
        string timezone
        datetime rsvp_deadline
        boolean is_public
        string access_code
        uuid created_by FK
        uuid theme_id FK
        json custom_theme_settings
        json additional_info
        boolean is_active
        boolean rsvp_enabled
        boolean gift_registry_enabled
        boolean updates_enabled
        integer max_guests_per_invitation
        string contact_email
        string contact_phone
        datetime created_at
        datetime updated_at
    }

    Guest ||--o{ RSVP : "submits"
    Guest ||--o{ GiftPurchase : "makes"
    Guest ||--o{ NotificationLog : "receives"
    Guest ||--o{ ActivityLog : "generates"
    Guest {
        uuid id PK
        uuid event_id FK
        uuid invited_by FK
        uuid user_id FK "nullable"
        string full_name
        string email
        string phone
        string invitation_code UK
        enum status "INVITED/PENDING/CONFIRMED/DECLINED/WAITLISTED/CANCELLED"
        integer max_additional_guests
        integer actual_additional_guests
        datetime invitation_sent_at
        datetime last_reminded_at
        datetime response_date
        string dietary_restrictions
        string notes
        json custom_fields
        boolean is_blocked
        boolean can_bring_guests
        datetime created_at
        datetime updated_at
    }

    RSVP {
        uuid id PK
        uuid guest_id FK
        uuid event_id FK
        enum status "ATTENDING/NOT_ATTENDING/MAYBE"
        integer number_of_guests
        string response_message
        string dietary_requirements
        json additional_info
        datetime response_date
        datetime last_updated
        datetime created_at
        datetime updated_at
    }

    GiftCategory ||--o{ GiftItem : "groups"
    GiftCategory {
        uuid id PK
        uuid event_id FK
        uuid created_by FK
        string name
        string description
        string icon
        string color
        integer display_order
        boolean is_visible
        json custom_fields
        datetime created_at
        datetime updated_at
    }

    GiftItem ||--o{ GiftPurchase : "tracks"
    GiftItem {
        uuid id PK
        uuid event_id FK
        uuid added_by FK
        uuid category_id FK
        string name
        string description
        float price
        string currency
        integer quantity_requested
        integer quantity_received
        enum status "AVAILABLE/RESERVED/PURCHASED/RECEIVED/REMOVED"
        enum priority "LOW/MEDIUM/HIGH/MUST_HAVE"
        string purchase_url
        string store_name
        string brand
        string model
        string image_url
        integer display_order
        boolean is_visible
        string notes
        json custom_fields
        datetime last_status_change
        datetime created_at
        datetime updated_at
    }

    GiftPurchase {
        uuid id PK
        uuid gift_id FK
        uuid guest_id FK
        integer quantity
        datetime purchased_at
        float purchase_price
        string purchase_currency
        string notes
    }

    EventTheme ||--o{ Event : "applied to"
    EventTheme {
        uuid id PK
        string name
        string description
        string preview_image_url
        json color_palette
        json fonts
        datetime created_at
        datetime updated_at
    }

    EventMedia {
        uuid id PK
        uuid event_id FK
        uuid uploaded_by FK
        string file_path
        string original_filename
        enum media_type "IMAGE/VIDEO/DOCUMENT"
        string content_type
        integer file_size
        enum purpose "BANNER/GALLERY/ATTACHMENT"
        boolean is_public
        integer display_order
        string title
        string description
        json media_metadata
        datetime created_at
        datetime updated_at
    }

    EmailTemplate {
        uuid id PK
        string name
        string description
        enum template_type "INVITATION/REMINDER/CONFIRMATION/UPDATE/THANK_YOU/CUSTOM"
        string subject
        text html_content
        text text_content
        json variables
        uuid event_id FK "nullable"
        uuid created_by FK
        boolean is_active
        boolean is_system
        datetime created_at
        datetime updated_at
    }

    NotificationLog {I will
        uuid id PK
        enum notification_type "EMAIL/SMS/PUSH/IN_APP"
        enum status "QUEUED/SENT/DELIVERED/FAILED/OPENED/CLICKED"
        string subject
        string content_preview
        uuid template_id FK
        uuid event_id FK
        uuid guest_id FK "nullable"
        string recipient
        datetime sent_at
        datetime delivered_at
        datetime opened_at
        string error_message
        integer retry_count
        string external_id
        json notification_metadata
        datetime created_at
        datetime updated_at
    }

    ActivityLog {
        uuid id PK
        enum activity_type
        text description
        uuid event_id FK "nullable"
        uuid user_id FK "nullable"
        uuid guest_id FK "nullable"
        uuid target_id "generic ID"
        string target_type "type of target"
        string ip_address
        string user_agent
        json data
        datetime created_at
        datetime updated_at
    }

    EmailTemplate }o--|| NotificationLog : "used for"
    User ||--o{ EventManager : "has roles"
    Event ||--o{ RSVP : "receives"