/**
 * Asset Entity
 * Mecánicas Diesel - ERP Suite
 *
 * Represents trackable assets and tools.
 * Module: MMD-013 Asset Management
 */

import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  UpdateDateColumn,
  ManyToOne,
  OneToMany,
  JoinColumn,
  Index,
} from 'typeorm';
import { AssetCategory } from './asset-category.entity';
import { AssetAssignment } from './asset-assignment.entity';
import { AssetMaintenance } from './asset-maintenance.entity';

export enum AssetStatus {
  AVAILABLE = 'available',
  ASSIGNED = 'assigned',
  IN_MAINTENANCE = 'in_maintenance',
  DAMAGED = 'damaged',
  RETIRED = 'retired',
}

export enum AssetLocation {
  WAREHOUSE = 'warehouse',
  UNIT = 'unit',
  TECHNICIAN = 'technician',
  EXTERNAL = 'external',
}

export enum CriticalityLevel {
  LOW = 'low',
  MEDIUM = 'medium',
  HIGH = 'high',
  CRITICAL = 'critical',
}

export enum AssigneeType {
  EMPLOYEE = 'employee',
  UNIT = 'unit',
  LOCATION = 'location',
}

@Entity({ name: 'assets', schema: 'assets' })
@Index('idx_assets_tenant', ['tenantId'])
@Index('idx_assets_category', ['categoryId'])
@Index('idx_assets_status', ['status'])
@Index('idx_assets_location', ['currentLocation'])
@Index('idx_assets_assignee', ['currentAssigneeId'])
export class Asset {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ name: 'tenant_id', type: 'uuid' })
  tenantId: string;

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

  @Column({ type: 'varchar', length: 150 })
  name: string;

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

  @Column({ name: 'category_id', type: 'uuid' })
  categoryId: string;

  @Column({ name: 'serial_number', type: 'varchar', length: 100, nullable: true })
  serialNumber?: string;

  @Column({ name: 'qr_code', type: 'varchar', length: 100, nullable: true })
  qrCode?: string;

  @Column({ type: 'varchar', length: 100, nullable: true })
  barcode?: string;

  @Column({ type: 'varchar', length: 100, nullable: true })
  manufacturer?: string;

  @Column({ type: 'varchar', length: 100, nullable: true })
  model?: string;

  @Column({ name: 'purchase_date', type: 'date', nullable: true })
  purchaseDate?: Date;

  @Column({ name: 'purchase_cost', type: 'decimal', precision: 12, scale: 2, nullable: true })
  purchaseCost?: number;

  @Column({ name: 'warranty_expiry', type: 'date', nullable: true })
  warrantyExpiry?: Date;

  @Column({
    type: 'varchar',
    length: 20,
    default: AssetStatus.AVAILABLE,
  })
  status: AssetStatus;

  @Column({
    name: 'current_location',
    type: 'varchar',
    length: 20,
    default: AssetLocation.WAREHOUSE,
  })
  currentLocation: AssetLocation;

  @Column({ name: 'current_assignee_id', type: 'uuid', nullable: true })
  currentAssigneeId?: string;

  @Column({ name: 'current_assignee_type', type: 'varchar', length: 20, nullable: true })
  currentAssigneeType?: AssigneeType;

  @Column({
    type: 'varchar',
    length: 20,
    default: CriticalityLevel.MEDIUM,
  })
  criticality: CriticalityLevel;

  @Column({ name: 'requires_calibration', type: 'boolean', default: false })
  requiresCalibration: boolean;

  @Column({ name: 'last_calibration_date', type: 'date', nullable: true })
  lastCalibrationDate?: Date;

  @Column({ name: 'next_calibration_date', type: 'date', nullable: true })
  nextCalibrationDate?: Date;

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

  @Column({ type: 'jsonb', default: {} })
  metadata: Record<string, any>;

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

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

  @Column({ name: 'created_by', type: 'uuid', nullable: true })
  createdBy?: string;

  // Relations
  @ManyToOne(() => AssetCategory)
  @JoinColumn({ name: 'category_id' })
  category: AssetCategory;

  @OneToMany(() => AssetAssignment, assignment => assignment.asset)
  assignments: AssetAssignment[];

  @OneToMany(() => AssetMaintenance, maintenance => maintenance.asset)
  maintenanceRecords: AssetMaintenance[];
}