package net.siteed.audiostream

import org.junit.Assert.*
import org.junit.Test

/**
 * Unit test for Device Disconnection Fallback Behavior
 * 
 * Tests the configuration and expected behavior for device disconnection scenarios.
 */
class DeviceDisconnectionFallbackUnitTest {

    @Test
    fun `test RecordingConfig stores deviceDisconnectionBehavior correctly`() {
        // Test fallback behavior
        val fallbackConfig = RecordingConfig(
            sampleRate = 44100,
            channels = 1,
            encoding = "pcm_16bit",
            deviceDisconnectionBehavior = "fallback"
        )
        
        assertEquals("Should store fallback behavior", "fallback", fallbackConfig.deviceDisconnectionBehavior)
        
        // Test pause behavior
        val pauseConfig = RecordingConfig(
            sampleRate = 44100,
            channels = 1,
            encoding = "pcm_16bit",
            deviceDisconnectionBehavior = "pause"
        )
        
        assertEquals("Should store pause behavior", "pause", pauseConfig.deviceDisconnectionBehavior)
        
        // Test default behavior (should be null)
        val defaultConfig = RecordingConfig(
            sampleRate = 44100,
            channels = 1,
            encoding = "pcm_16bit"
        )
        
        assertNull("Default behavior should be null", defaultConfig.deviceDisconnectionBehavior)
    }

    @Test
    fun `test AudioRecorderManager stores deviceDisconnectionBehavior`() {
        val config = RecordingConfig(
            sampleRate = 44100,
            channels = 1,
            encoding = "pcm_16bit",
            deviceDisconnectionBehavior = "fallback"
        )
        
        // Verify the config has the correct behavior
        assertEquals("fallback", config.deviceDisconnectionBehavior)
        
        // AudioRecorderManager should use this configuration
        // The actual AudioRecorderManager.getDeviceDisconnectionBehavior() 
        // will return this value when recording is started with this config
    }

    @Test
    fun `test device disconnection behavior values`() {
        val validBehaviors = listOf("fallback", "pause")
        
        for (behavior in validBehaviors) {
            val config = RecordingConfig(
                sampleRate = 44100,
                channels = 1,
                encoding = "pcm_16bit",
                deviceDisconnectionBehavior = behavior
            )
            
            assertEquals("Should accept $behavior behavior", behavior, config.deviceDisconnectionBehavior)
        }
    }

    @Test
    fun `test interruption event reasons`() {
        // Test expected event reasons for device disconnection scenarios
        val expectedReasons = mapOf(
            "fallback" to listOf("deviceFallback", "deviceSwitchFailed"),
            "pause" to listOf("deviceDisconnected")
        )
        
        // Verify the expected reasons are valid strings
        expectedReasons.forEach { (behavior, reasons) ->
            assertNotNull("Behavior $behavior should have reasons", reasons)
            assertTrue("Behavior $behavior should have at least one reason", reasons.isNotEmpty())
            
            reasons.forEach { reason ->
                assertNotNull("Reason should not be null", reason)
                assertTrue("Reason should not be empty", reason.isNotEmpty())
            }
        }
    }

    @Test
    fun `test fallback behavior logic`() {
        // Test the logic for fallback behavior
        val behavior = "fallback"
        
        // When behavior is fallback:
        // 1. Should attempt to get default device
        // 2. If default device exists, should select it
        // 3. If selection succeeds, should send "deviceFallback" event
        // 4. If selection fails, should pause and send "deviceSwitchFailed" event
        // 5. If no default device, should pause and send "deviceDisconnected" event
        
        when (behavior) {
            "fallback" -> {
                // This branch should be taken
                assertTrue("Should handle fallback behavior", true)
            }
            else -> {
                fail("Should not reach default case for fallback behavior")
            }
        }
    }

    @Test
    fun `test pause behavior logic`() {
        // Test the logic for pause behavior
        val behavior = "pause"
        
        // When behavior is pause:
        // 1. Should pause recording immediately
        // 2. Should send "deviceDisconnected" event
        
        when (behavior) {
            "fallback" -> {
                fail("Should not handle as fallback")
            }
            else -> {
                // This branch should be taken for pause
                assertTrue("Should handle pause behavior", true)
            }
        }
    }
}