package link.roadio.riff.config

import org.junit.Assert.assertEquals
import org.junit.Assert.assertNull
import org.junit.Assert.assertSame
import org.junit.Test

class ExternalConfigurationMergeTest {
    @Test fun allDisjointOverlaysParticipateInEitherOrder() {
        val a = """{"player":{"rewindPreviousThresholdSeconds":{"music":7}}}"""
        val b = """{"player":{"rewindPreviousThresholdSeconds":{"audiobook":21}},
            "skins":{"default":{"behavior":{"enableStatusLines":false}}}}"""
        for (inputs in listOf(listOf(a, b), listOf(b, a))) {
            val value = ProjectConfiguration.parseAll(inputs)
            assertEquals(7.0, value.number("player.rewindPreviousThresholdSeconds.music"), 0.0)
            assertEquals(21.0, value.number("player.rewindPreviousThresholdSeconds.audiobook"), 0.0)
            assertEquals(false, value.value("behavior.enableStatusLines"))
        }
    }

    @Test fun conflictsFollowEncounterOrderWithoutChoosingAFilePriority() {
        val a = """{"player":{"rewindPreviousThresholdSeconds":{"music":4}}}"""
        val b = """{"player":{"rewindPreviousThresholdSeconds":{"music":8}}}"""
        assertEquals(8.0, ProjectConfiguration.parseAll(listOf(a, b)).number("player.rewindPreviousThresholdSeconds.music"), 0.0)
        assertEquals(4.0, ProjectConfiguration.parseAll(listOf(b, a)).number("player.rewindPreviousThresholdSeconds.music"), 0.0)
    }

    @Test fun invalidDiscoveredInputRejectsTheCompleteSetAndReadsOnlyOnce() {
        var reads = 0
        val startup = StartupConfiguration()
        val value =
            startup.loadAll {
                reads++
                listOf("""{"player":{"rewindPreviousThresholdSeconds":{"music":8}}}""", "{bad}")
            }
        assertEquals(ConfigurationProblem.INVALID, value.problem)
        assertEquals(3.0, value.snapshot.number("player.rewindPreviousThresholdSeconds.music"), 0.0)
        assertSame(value, startup.loadAll { error("Reloaded") })
        assertEquals(1, reads)
    }

    @Test fun arraysReplaceAndTransportReparsesTheSameAggregate() {
        val a = """{"player":{"excludedGenreIds":["-100000"]}}"""
        val b = """{"player":{"excludedGenreIds":["-100001","-100002"]}}"""
        val merged = checkNotNull(ProjectConfiguration.mergeUserTexts(listOf(a, b)))
        assertEquals(listOf("-100001", "-100002"), ProjectConfiguration.parse(merged).value("player.excludedGenreIds"))
        assertNull(ProjectConfiguration.mergeUserTexts(emptyList()))
    }
}