import {
  Column,
  CreateDateColumn,
  Entity,
  ManyToOne,
  OneToMany,
  OneToOne,
  PrimaryGeneratedColumn,
  UpdateDateColumn,
  JoinColumn,
} from 'typeorm';
import { EventType } from './event-type.entity';
import { RecurrenceRule } from './recurrence-rule.entity';
import { EventException } from './event-exception.entity';
import { Booking } from './booking.entity';

@Entity('events')
export class Event {
  @PrimaryGeneratedColumn({ type: 'bigint' })
  id: number;

  @Column({ name: 'title', type: 'varchar', length: 255 })
  title: string;

  @Column({ name: 'description', type: 'text', nullable: true })
  description: string;

  @Column({ name: 'start_time', type: 'timestamptz' })
  startTime: Date;

  @Column({ name: 'end_time', type: 'timestamptz' })
  endTime: Date;

  @Column({ name: 'timezone', type: 'varchar', length: 50 })
  timezone: string;

  @Column({ name: 'is_recurring', type: 'boolean', default: false })
  isRecurring: boolean;

  @CreateDateColumn({ name: 'created_at', type: 'timestamp' })
  createdAt: Date;

  @UpdateDateColumn({ name: 'updated_at', type: 'timestamp' })
  updatedAt: Date;

  // --- Relationships ---

  @Column({ name: 'event_type_id', type: 'bigint', nullable: true })
  eventTypeId: number;

  @ManyToOne(() => EventType, (eventType) => eventType.events, {
    nullable: true,
    onDelete: 'SET NULL', // As requested for optional relationship
  })
  @JoinColumn({ name: 'event_type_id' })
  eventType: EventType;

  @OneToOne(() => RecurrenceRule, (rule) => rule.event, {
    cascade: true, // Automatically save/update recurrence rule when event is saved
  })
  recurrenceRule: RecurrenceRule;

  @OneToMany(() => EventException, (exception) => exception.event, {
    cascade: true, // Automatically save/update exceptions when event is saved
  })
  exceptions: EventException[];

  @OneToMany(() => Booking, (booking) => booking.event, {
    cascade: true, // Automatically save/update exceptions when event is saved
  })
  bookings: Booking[];
}