package pw.binom.agentik.desktop.session

import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.cancel
import kotlinx.coroutines.runBlocking
import org.junit.jupiter.api.io.TempDir
import pw.binom.agentik.desktop.settings.AgentConfig
import pw.binom.agentik.desktop.settings.SettingsRepository
import pw.binom.agentik.desktop.settings.ThemeId
import java.nio.file.Path
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertNull
import kotlin.test.assertTrue

/**
 * Тесты [AgentRegistry]: persist настроек и переходы статусов. Подключение
 * подменено [AgentConnector], который всегда падает — так проверяем
 * деградацию в [AgentStatus.Offline] без сети. Успешное [AgentStatus.Online]
 * потребовало бы настоящего [AgentConnection] (его конструктор приватный),
 * поэтому проверяется косвенно — см. подключение к реальному серверу вручную.
 */
class AgentRegistryTest {

    @TempDir
    lateinit var dir: Path

    private fun registry(scope: CoroutineScope) = AgentRegistry(
        settingsRepo = SettingsRepository.inDirectory(dir),
        scope = scope,
        connector = { _, _ -> throw RuntimeException("нет сети") },
    )

    @Test
    fun `add agent persists config and goes offline on failure`() = runBlocking {
        val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
        val reg = registry(scope)
        try {
            reg.load()
            val cfg = AgentConfig.create("http://192.168.1.5:8080/agentik", nameOverride = "Тестовый")
            val status = reg.addAgent(cfg)

            assertTrue(status is AgentStatus.Offline)
            assertEquals(1, reg.settings.value.agents.size)
            assertNull(reg.connection(cfg.id))

            // persist переживает переоткрытие
            val reopened = SettingsRepository.inDirectory(dir).load()
            assertEquals(listOf(cfg), reopened.agents)
        } finally {
            reg.close()
            scope.cancel()
        }
    }

    @Test
    fun `update agent persists new baseUrl`() = runBlocking {
        val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
        val reg = registry(scope)
        try {
            reg.load()
            val cfg = AgentConfig.create("http://old:8080/agentik")
            reg.addAgent(cfg)

            reg.updateAgent(cfg.copy(baseUrl = "http://new:9090/agentik"))

            assertEquals("http://new:9090/agentik", reg.settings.value.agents.single().baseUrl)
            assertEquals("http://new:9090/agentik", SettingsRepository.inDirectory(dir).load().agents.single().baseUrl)
        } finally {
            reg.close()
            scope.cancel()
        }
    }

    @Test
    fun `remove agent drops it from settings and statuses`() = runBlocking {
        val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
        val reg = registry(scope)
        try {
            reg.load()
            val cfg = AgentConfig.create("http://host:8080/agentik")
            reg.addAgent(cfg)

            reg.removeAgent(cfg.id)

            assertTrue(reg.settings.value.agents.isEmpty())
            assertNull(reg.statuses.value[cfg.id])
            assertTrue(SettingsRepository.inDirectory(dir).load().agents.isEmpty())
        } finally {
            reg.close()
            scope.cancel()
        }
    }

    @Test
    fun `updateSettings persists theme`() = runBlocking {
        val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
        val reg = registry(scope)
        try {
            reg.load()
            reg.updateSettings { it.copy(themeId = ThemeId.LIGHT) }

            assertEquals(ThemeId.LIGHT, reg.settings.value.themeId)
            assertEquals(ThemeId.LIGHT, SettingsRepository.inDirectory(dir).load().themeId)
        } finally {
            reg.close()
            scope.cancel()
        }
    }

    @Test
    fun `update nonexistent agent is offline and does not add it`() = runBlocking {
        val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
        val reg = registry(scope)
        try {
            reg.load()
            val status = reg.updateAgent(AgentConfig.create("http://host:8080/agentik"))

            assertTrue(status is AgentStatus.Offline)
            assertTrue(reg.settings.value.agents.isEmpty())
        } finally {
            reg.close()
            scope.cancel()
        }
    }
}