import { BaseEntity } from '@edr/api-common';
import { Column, Entity } from 'typeorm';

/**
 * numeric comes back from pg as a string. Every value here is arithmetic in a
 * report expression, so convert on read rather than making each caller do it.
 */
const asNumber = {
  to: (value: number) => value,
  from: (value: string | null) => (value === null ? null : Number(value)),
};

/**
 * Single-row table holding the railway's operating standards — the numbers the
 * operations reports measure actual performance against. Same single-row shape
 * as `logo_settings` and `exchange_settings`; the app never inserts a second row.
 *
 * These live in the database rather than in a constants file because the
 * business treats them as tunable (the corridor standard is explicitly
 * described as "flexible"), and a planner must be able to change one without a
 * deployment.
 */
@Entity({ schema: 'freight', name: 'operations_standards' })
export class OperationsStandard extends BaseEntity {
  /** Standard time a train may stand at an Ethiopian station, in hours. */
  @Column({
    name: 'station_standard_hours_ethiopia',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 10,
    transformer: asNumber,
  })
  stationStandardHoursEthiopia!: number;

  /** Standard time a train may stand at a Djibouti station, in hours. */
  @Column({
    name: 'station_standard_hours_djibouti',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 13,
    transformer: asNumber,
  })
  stationStandardHoursDjibouti!: number;

  /** Container turn-around cycle: 10 + 21 + 13 + 21. */
  @Column({
    name: 'cycle_standard_hours_container',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 65,
    transformer: asNumber,
  })
  cycleStandardHoursContainer!: number;

  /** Bulk cycle via DMP: 13 + 21 + 33 + 21. */
  @Column({
    name: 'cycle_standard_hours_bulk_dmp',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 88,
    transformer: asNumber,
  })
  cycleStandardHoursBulkDmp!: number;

  /** Bulk cycle via Negad freight yard: 13 + 21 + 41 + 21. */
  @Column({
    name: 'cycle_standard_hours_bulk_nagad',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 96,
    transformer: asNumber,
  })
  cycleStandardHoursBulkNagad!: number;

  /** Bulk cycle via BCC: 13 + 21 + 41 + 21. */
  @Column({
    name: 'cycle_standard_hours_bulk_bcc',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 96,
    transformer: asNumber,
  })
  cycleStandardHoursBulkBcc!: number;

  /**
   * Standard running time for one corridor leg, used when the yard pair has no
   * `yard_distances.standard_hours` of its own.
   */
  @Column({
    name: 'default_leg_standard_hours',
    type: 'numeric',
    precision: 6,
    scale: 2,
    default: 21,
    transformer: asNumber,
  })
  defaultLegStandardHours!: number;

  /** Grace on top of the leg standard before a train counts as delayed. */
  @Column({ name: 'delay_tolerance_minutes', type: 'int', default: 30 })
  delayToleranceMinutes!: number;

  /** Charged tonnage per laden 20ft container. */
  @Column({
    name: 'charged_tons_full_20ft',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 20,
    transformer: asNumber,
  })
  chargedTonsFull20ft!: number;

  /** Charged tonnage per laden 40ft container. */
  @Column({
    name: 'charged_tons_full_40ft',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 40,
    transformer: asNumber,
  })
  chargedTonsFull40ft!: number;

  /** Charged tonnage per empty 20ft container. */
  @Column({
    name: 'charged_tons_empty_20ft',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 2.24,
    transformer: asNumber,
  })
  chargedTonsEmpty20ft!: number;

  /** Charged tonnage per empty 40ft container. */
  @Column({
    name: 'charged_tons_empty_40ft',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 3.88,
    transformer: asNumber,
  })
  chargedTonsEmpty40ft!: number;

  /** Charged tonnage per wagon of steel, fertilizer, rice, sugar, livestock. */
  @Column({
    name: 'charged_tons_per_wagon_general',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 70,
    transformer: asNumber,
  })
  chargedTonsPerWagonGeneral!: number;

  /** Charged tonnage per wagon of vegetables, milk, meat and other perishables. */
  @Column({
    name: 'charged_tons_per_wagon_perishable',
    type: 'numeric',
    precision: 8,
    scale: 2,
    default: 38,
    transformer: asNumber,
  })
  chargedTonsPerWagonPerishable!: number;

  /**
   * Wagons in a full trainset when the cargo type has no
   * `cargo_types.full_trainset_wagons` of its own.
   */
  @Column({ name: 'default_full_trainset_wagons', type: 'int', default: 50 })
  defaultFullTrainsetWagons!: number;

  /**
   * Standard loading-and-unloading time for a container train's stop, in hours.
   *
   * Null until a planner sets it, and deliberately so: the reporting spec names
   * no handling standard, so an unset value reports no rate rather than judging
   * a train against a guess. Same for the bulk figure below.
   */
  @Column({
    name: 'handling_standard_hours_container',
    type: 'numeric',
    precision: 6,
    scale: 2,
    nullable: true,
    transformer: asNumber,
  })
  handlingStandardHoursContainer?: number | null;

  /** Standard loading-and-unloading time for a bulk train's stop, in hours. */
  @Column({
    name: 'handling_standard_hours_bulk',
    type: 'numeric',
    precision: 6,
    scale: 2,
    nullable: true,
    transformer: asNumber,
  })
  handlingStandardHoursBulk?: number | null;

  /** IAM user id of the last operator to change a standard. */
  @Column({ name: 'updated_by_id', type: 'uuid', nullable: true })
  updatedById?: string | null;
}