import pg from 'pg'
import { afterAll, beforeAll, describe, expect, it } from 'vitest'
import { openRelayDatabase, type RelayDatabase } from './database.js'

const databaseUrl = process.env.ORCA_RELAY_TEST_POSTGRES_URL
const describePostgres = databaseUrl ? describe : describe.skip
const schema = 'relay_schema_concurrency_test'

describePostgres('PostgreSQL schema concurrency', () => {
  let scopedUrl = ''

  beforeAll(async () => {
    const client = new pg.Client({ connectionString: databaseUrl })
    await client.connect()
    try {
      await client.query(`DROP SCHEMA IF EXISTS ${schema} CASCADE`)
      await client.query(`CREATE SCHEMA ${schema}`)
    } finally {
      await client.end()
    }
    const url = new URL(databaseUrl!)
    url.searchParams.set('options', `-c search_path=${schema}`)
    scopedUrl = url.toString()
  })

  afterAll(async () => {
    const client = new pg.Client({ connectionString: databaseUrl })
    await client.connect()
    try {
      await client.query(`DROP SCHEMA IF EXISTS ${schema} CASCADE`)
    } finally {
      await client.end()
    }
  })

  it('opens five directors when one new table is absent', async () => {
    // Which catalog step the race loser fails on depends on scheduling, so run several rounds and
    // keep the loser's SQLSTATE in the failure instead of a bare boolean.
    for (let round = 0; round < 10; round += 1) {
      const initial = await openRelayDatabase({ databaseUrl: scopedUrl, dataDir: '' })
      await initial.query(`DROP TABLE relay_cell_legacy_fence_adoptions`)
      await initial.close()

      const results = await Promise.allSettled(
        Array.from({ length: 5 }, async (): Promise<RelayDatabase> =>
          await openRelayDatabase({ databaseUrl: scopedUrl, dataDir: '' })
        )
      )
      const databases = results.flatMap((result) =>
        result.status === 'fulfilled' ? [result.value] : []
      )
      await Promise.all(databases.map(async (database) => await database.close()))
      const rejections = results.flatMap((result) =>
        result.status === 'rejected'
          ? [{ round, code: (result.reason as { code?: unknown }).code, message: String(result.reason) }]
          : []
      )
      expect(rejections).toEqual([])
    }
  }, 60_000)
})