msgexchange-v2/src/test/kotlin/com/gzzn/omms/msgexchange/domain/OperationDayTest.kt

package com.gzzn.omms.msgexchange.domain

import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Assertions.assertFalse
import org.junit.jupiter.api.Assertions.assertNull
import org.junit.jupiter.api.Test
import java.time.LocalDate
import java.time.ZoneId

/**
 * 守着运营日的算法：用计划运行时间 SODT（ddMMMyyHHmm）加机场时区算，本地时刻早于切日边界的
 * 归到前一个运营日；越界的切日边界收敛到 23；SODT 缺失或格式不对就返回 null。
 */
class OperationDayTest {

    private val zone: ZoneId = ZoneId.of("Asia/Shanghai")

    @Test
    fun `computes operation day from SODT with zero cutoff`() {
        val calc = OperationDayCalculator(zone, cutoffHour = 0)
        assertEquals(LocalDate.of(2026, 12, 15), calc.compute("15DEC261723"))
    }

    @Test
    fun `time before cutoff rolls back to previous operation day`() {
        val calc = OperationDayCalculator(zone, cutoffHour = 4)
        // 04:00 之前 → 前一运营日
        assertEquals(LocalDate.of(2026, 12, 14), calc.compute("15DEC260230"))
        // 04:00 整点起归属当日
        assertEquals(LocalDate.of(2026, 12, 15), calc.compute("15DEC260400"))
    }

    @Test
    fun `invalid or missing SODT returns null`() {
        val calc = OperationDayCalculator(zone, 0)
        assertNull(calc.compute(null))
        assertNull(calc.compute(""))
        assertNull(calc.compute("garbage"))
        assertNull(calc.compute("99XXC12345"))
    }

    @Test
    fun `cutoff outside 0 to 23 is clamped to 23`() {
        val calc = OperationDayCalculator(zone, cutoffHour = 99)
        // 越界收敛为 23：当日 00:00 早于 23 点 → 归属前一运营日
        assertEquals(LocalDate.of(2026, 12, 14), calc.compute("15DEC260000"))
    }
}