import 'reflect-metadata';
import { readFileSync } from 'node:fs';
import { join } from 'node:path';
import { getMetadataArgsStorage } from 'typeorm';
import { MonsterDefinition } from '../../monsters/entities/monster-definition.entity';
import { LocationDefinition } from '../../world/entities/location-definition.entity';

const MIGRATION_SQL = readFileSync(
  join(__dirname, '1788700000000-CreateLocalLocationView.ts'),
  'utf8',
);

function columnNames(target: unknown): string[] {
  return getMetadataArgsStorage()
    .columns.filter((column) => column.target === target)
    .map((column) => column.options.name)
    .filter((name): name is string => typeof name === 'string');
}

describe('local location view schema', () => {
  const newLocationColumns = [
    'region_name',
    'region_tier_label',
    'location_type',
    'local_description',
    'local_artwork_path',
    'local_points_of_interest',
    'local_primary_actions',
    'local_reward_preview',
  ];

  it.each(newLocationColumns)(
    'maps %s on LocationDefinition',
    (name: string) => {
      expect(columnNames(LocationDefinition)).toContain(name);
    },
  );

  it.each(newLocationColumns)('adds %s in the migration', (name: string) => {
    expect(MIGRATION_SQL).toContain(
      `ALTER TABLE "location_definitions" ADD COLUMN "${name}"`,
    );
    expect(MIGRATION_SQL).toContain(
      `ALTER TABLE "location_definitions" DROP COLUMN "${name}"`,
    );
  });

  it('adds the monster icon path in both the entity and the migration', () => {
    expect(columnNames(MonsterDefinition)).toContain('icon_path');
    expect(MIGRATION_SQL).toContain(
      'ALTER TABLE "monster_definitions" ADD COLUMN "icon_path"',
    );
    expect(MIGRATION_SQL).toContain(
      'ALTER TABLE "monster_definitions" DROP COLUMN "icon_path"',
    );
  });

  it('keeps the map-level columns untouched so the world screen is unaffected', () => {
    expect(MIGRATION_SQL).not.toContain('DROP COLUMN "description"');
    expect(MIGRATION_SQL).not.toContain('DROP COLUMN "artwork_path"');
    expect(columnNames(LocationDefinition)).toEqual(
      expect.arrayContaining(['description', 'artwork_path', 'region_key']),
    );
  });

  it('backfills existing rows so no location renders an empty breadcrumb', () => {
    expect(MIGRATION_SQL).toContain(
      'UPDATE "location_definitions" SET "region_name" = "region_key"',
    );
  });
});