import std/[os, times, unittest]
import db_connector/[db_common, db_postgres]

import fiber_orm/util

proc utcDateTime(nanosecond: NanosecondRange): DateTime =
  dateTime(
    2026, mAug, 26, 14, 32, 10, nanosecond,
    utc())

let connectionString = getEnv("FIBER_ORM_TEST_DB")
if connectionString.len == 0:
  quit "FIBER_ORM_TEST_DB must contain a PostgreSQL connection string"

suite "PostgreSQL DateTime round trips":
  test "preserves whole-second, millisecond, and microsecond values":
    let db = db_postgres.open("", "", "", connectionString)
    defer: db.close()
    db.exec(sql"SET TIME ZONE 'UTC'")

    for expected in [
      utcDateTime(0),
      utcDateTime(123_000_000),
      utcDateTime(123_457_000),
    ]:
      let dbValue = db.getValue(
        sql"SELECT ?::timestamp with time zone",
        dbFormat(expected))
      let actual = parsePGDatetime(dbValue)
      check actual.toTime == expected.toTime