package __PACKAGE__.conformance

import androidx.compose.material3.MaterialTheme
import androidx.compose.ui.semantics.SemanticsActions
import androidx.compose.ui.semantics.SemanticsNode
import androidx.compose.ui.semantics.SemanticsProperties
import androidx.compose.ui.semantics.getOrNull
import androidx.compose.ui.test.ExperimentalTestApi
import androidx.compose.ui.test.hasText
import androidx.compose.ui.test.onRoot
import androidx.compose.ui.test.runComposeUiTest
import __PACKAGE__.domain.model.Item
import __PACKAGE__.domain.usecase.GetItemsUseCase
import __PACKAGE__.presentation.home.HomeScreen
import __PACKAGE__.presentation.home.HomeViewModel
import __PACKAGE__.testing.awaitNode
import __PACKAGE__.testing.fakes.FakeItemRepository
import kotlin.test.Test
import kotlin.test.fail

/**
 * A11y gate — SPEC: SHELL-04. Every interactive node must be perceivable by assistive
 * technology and automation: a testTag, text, or contentDescription. Runs on the JVM tier;
 * the verify lane's `a11y` step. (Deeper checks — touch-target size, contrast — come with
 * the live-tier inspector audit.)
 */
@OptIn(ExperimentalTestApi::class)
class A11yConformanceTest {

    // SPEC: SHELL-04
    @Test
    fun `every clickable on Home is perceivable`() = runComposeUiTest {
        val repository = FakeItemRepository().apply {
            items = listOf(Item(id = "1", title = "A11y row", subtitle = "sub"))
        }
        setContent {
            MaterialTheme {
                HomeScreen(onItemClick = {}, viewModel = HomeViewModel(GetItemsUseCase(repository)))
            }
        }
        awaitNode(hasText("A11y row"))

        val offenders = mutableListOf<String>()
        fun walk(node: SemanticsNode) {
            val clickable = node.config.getOrNull(SemanticsActions.OnClick) != null
            if (clickable) {
                val perceivable =
                    node.config.getOrNull(SemanticsProperties.TestTag) != null ||
                        !node.config.getOrNull(SemanticsProperties.Text).isNullOrEmpty() ||
                        !node.config.getOrNull(SemanticsProperties.ContentDescription).isNullOrEmpty() ||
                        node.children.any { !it.config.getOrNull(SemanticsProperties.Text).isNullOrEmpty() }
                if (!perceivable) offenders += "node@${node.id} (bounds=${node.boundsInRoot})"
            }
            node.children.forEach(::walk)
        }
        walk(onRoot(useUnmergedTree = true).fetchSemanticsNode())

        if (offenders.isNotEmpty()) fail(
            "[SHELL-04] Interactive nodes without testTag/text/contentDescription:\n  " +
                offenders.joinToString("\n  ") +
                "\n  Fix: give each clickable a testTag or visible text/contentDescription.",
        )
    }
}