import { Entity, PrimaryGeneratedColumn, Column, Index, ManyToOne, JoinColumn } from 'typeorm';
import { z } from '@hono/zod-openapi';
import { UserEntity, UserSchema } from '@/server/modules/users/user.entity';

@Entity('file')
export class File {
  @PrimaryGeneratedColumn({ name: 'id', type: 'int', unsigned: true })
  id!: number;

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

  @Column({ name: 'type', type: 'varchar', length: 50, nullable: true, comment: '文件类型' })
  type!: string | null;

  @Column({ name: 'size', type: 'int', unsigned: true, nullable: true, comment: '文件大小，单位字节' })
  size!: number | null;

  @Column({ name: 'path', type: 'varchar', length: 512, comment: '文件存储路径' })
  path!: string;

  @Column({ name: 'description', type: 'text', nullable: true, comment: '文件描述' })
  description!: string | null;

  @Column({ name: 'upload_user_id', type: 'int', unsigned: true })
  uploadUserId!: number;

  @ManyToOne(() => UserEntity)
  @JoinColumn({ name: 'upload_user_id', referencedColumnName: 'id' })
  uploadUser!: UserEntity;

  @Column({ name: 'upload_time', type: 'datetime' })
  uploadTime!: Date;

  @Column({ name: 'last_updated', type: 'datetime', nullable: true, comment: '最后更新时间' })
  lastUpdated!: Date | null;

  @Column({ name: 'created_at', type: 'timestamp', default: () => 'CURRENT_TIMESTAMP' })
  createdAt!: Date;

  @Column({ 
    name: 'updated_at', 
    type: 'timestamp', 
    default: () => 'CURRENT_TIMESTAMP', 
    onUpdate: 'CURRENT_TIMESTAMP' 
  })
  updatedAt!: Date;
}

export const FileSchema = z.object({
  id: z.number().int().positive().openapi({
    description: '文件ID',
    example: 1
  }),
  name: z.string().max(255).openapi({
    description: '文件名称',
    example: '项目计划书.pdf'
  }),
  type: z.string().max(50).nullable().openapi({
    description: '文件类型',
    example: 'application/pdf'
  }),
  size: z.number().int().positive().nullable().openapi({
    description: '文件大小，单位字节',
    example: 102400
  }),
  path: z.string().max(512).openapi({
    description: '文件存储路径',
    example: '/uploads/documents/2023/project-plan.pdf'
  }),
  description: z.string().nullable().openapi({
    description: '文件描述',
    example: '2023年度项目计划书'
  }),
  uploadUserId: z.number().int().positive().openapi({
    description: '上传用户ID',
    example: 1
  }),
  uploadUser: UserSchema,
  uploadTime: z.date().openapi({
    description: '上传时间',
    example: '2023-01-15T10:30:00Z'
  }),
  lastUpdated: z.date().nullable().openapi({
    description: '最后更新时间',
    example: '2023-01-16T14:20:00Z'
  }),
  createdAt: z.date().openapi({
    description: '创建时间',
    example: '2023-01-15T10:30:00Z'
  }),
  updatedAt: z.date().openapi({
    description: '更新时间',
    example: '2023-01-16T14:20:00Z'
  })
});

export const CreateFileDto = z.object({
  name: z.string().max(255).openapi({
    description: '文件名称',
    example: '项目计划书.pdf'
  }),
  type: z.string().max(50).nullable().optional().openapi({
    description: '文件类型',
    example: 'application/pdf'
  }),
  size: z.coerce.number().int().positive().nullable().optional().openapi({
    description: '文件大小，单位字节',
    example: 102400
  }),
  path: z.string().max(512).openapi({
    description: '文件存储路径',
    example: '/uploads/documents/2023/project-plan.pdf'
  }),
  description: z.string().nullable().optional().openapi({
    description: '文件描述',
    example: '2023年度项目计划书'
  }),
  lastUpdated: z.coerce.date().nullable().optional().openapi({
    description: '最后更新时间',
    example: '2023-01-16T14:20:00Z'
  })
});

export const UpdateFileDto = z.object({
  name: z.string().max(255).optional().openapi({ 
    description: '文件名称',
    example: '项目计划书_v2.pdf' 
  }),
  type: z.string().max(50).nullable().optional().openapi({ 
    description: '文件类型',
    example: 'application/pdf' 
  }),
  size: z.coerce.number().int().positive().nullable().optional().openapi({ 
    description: '文件大小，单位字节',
    example: 153600 
  }),
  path: z.string().max(512).optional().openapi({ 
    description: '文件存储路径',
    example: '/uploads/documents/2023/project-plan_v2.pdf' 
  }),
  description: z.string().nullable().optional().openapi({ 
    description: '文件描述',
    example: '2023年度项目计划书（修订版）' 
  }),
  uploadUserId: z.number().int().positive().optional().openapi({
    description: '上传用户ID',
    example: 1
  }),
  uploadTime: z.coerce.date().optional().openapi({ 
    description: '上传时间',
    example: '2023-01-15T10:30:00Z' 
  }),
  lastUpdated: z.coerce.date().nullable().optional().openapi({ 
    description: '最后更新时间',
    example: '2023-01-16T14:20:00Z' 
  })
});