import {
  BaseSmartTags,
  PgColumn,
  PgFkColumn,
  PgTable,
  PgType,
} from '../../abstractions';
import { buildName } from '../pg-sql-gen-utils';

export class VirtualFkColumn implements PgFkColumn {
  name: string;
  readonly table: PgTable;
  readonly type: PgType;
  readonly additionalStatements: string[] = [];
  readonly targetPk: PgColumn;

  constructor(targetPk: PgColumn, table: PgTable) {
    this.targetPk = targetPk;
    this.name = buildName(targetPk.table.name, targetPk.name);
    // Right now we just assume that all content types have the same PK type.
    this.type = targetPk.type;
    this.table = table;
  }
  buildSmartTags(): BaseSmartTags {
    return {};
  }
  buildExpression(): string {
    return `${this.name} ${this.type}`;
  }

  buildAdditionalStatements(): string[] {
    return [`CREATE INDEX ON ${this.table.buildFullName()} (${this.name})`];
  }
}