package cash.z.ecc.ui.screen.restore.view

import android.content.Context
import android.view.inputmethod.InputMethodManager
import androidx.compose.ui.test.assertIsFocused
import androidx.compose.ui.test.assertTextContains
import androidx.compose.ui.test.assertTextEquals
import androidx.compose.ui.test.hasTestTag
import androidx.compose.ui.test.hasText
import androidx.compose.ui.test.junit4.ComposeContentTestRule
import androidx.compose.ui.test.junit4.createComposeRule
import androidx.compose.ui.test.onNodeWithContentDescription
import androidx.compose.ui.test.onNodeWithTag
import androidx.compose.ui.test.onNodeWithText
import androidx.compose.ui.test.performClick
import androidx.compose.ui.test.performTextInput
import androidx.test.core.app.ApplicationProvider
import androidx.test.filters.MediumTest
import cash.z.ecc.android.bip39.Mnemonics
import cash.z.ecc.sdk.fixture.SeedPhraseFixture
import cash.z.ecc.sdk.model.SeedPhrase
import cash.z.ecc.ui.R
import cash.z.ecc.ui.screen.common.CommonTag
import cash.z.ecc.ui.screen.restore.RestoreTag
import cash.z.ecc.ui.screen.restore.state.WordList
import cash.z.ecc.ui.test.getStringResource
import cash.z.ecc.ui.theme.ZcashTheme
import org.junit.Assert.assertEquals
import org.junit.Assert.assertTrue
import org.junit.Rule
import org.junit.Test
import java.util.Locale

class RestoreViewTest {
    @get:Rule
    val composeTestRule = createComposeRule()

    @Test
    @MediumTest
    fun keyboard_appears_on_launch() {
        newTestSetup(emptyList())

        composeTestRule.waitForIdle()

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.assertIsFocused()
        }

        val inputMethodManager = ApplicationProvider.getApplicationContext<Context>().getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        assertTrue(inputMethodManager.isAcceptingText)
    }

    @Test
    @MediumTest
    fun autocomplete_suggestions_appear() {
        newTestSetup(emptyList())

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.performTextInput("ab")

            // Make sure text isn't cleared
            it.assertTextContains("ab")
        }

        composeTestRule.onNode(hasText("abandon") and hasTestTag(RestoreTag.AUTOCOMPLETE_ITEM)).also {
            it.assertExists()
        }

        composeTestRule.onNode(hasText("able") and hasTestTag(RestoreTag.AUTOCOMPLETE_ITEM)).also {
            it.assertExists()
        }
    }

    @Test
    @MediumTest
    fun choose_autocomplete() {
        newTestSetup(emptyList())

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.performTextInput("ab")
        }

        composeTestRule.onNode(hasText("abandon") and hasTestTag(RestoreTag.AUTOCOMPLETE_ITEM)).also {
            it.performClick()
        }

        composeTestRule.onNodeWithTag(RestoreTag.AUTOCOMPLETE_LAYOUT).also {
            it.assertDoesNotExist()
        }

        composeTestRule.onNode(hasText("abandon") and hasTestTag(CommonTag.CHIP), useUnmergedTree = true).also {
            it.assertExists()
        }

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.assertTextEquals("")
        }
    }

    @Test
    @MediumTest
    fun type_full_word() {
        newTestSetup(emptyList())

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.performTextInput("abandon")
        }

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.assertTextEquals("")
        }

        composeTestRule.onNodeWithTag(RestoreTag.AUTOCOMPLETE_LAYOUT).also {
            it.assertDoesNotExist()
        }

        composeTestRule.onNode(hasText("abandon") and hasTestTag(CommonTag.CHIP), useUnmergedTree = true).also {
            it.assertExists()
        }

        composeTestRule.onNodeWithTag(RestoreTag.SEED_WORD_TEXT_FIELD).also {
            it.assertTextEquals("")
        }
    }

    @Test
    @MediumTest
    fun invalid_phrase_does_not_progress() {
        newTestSetup(generateSequence { "abandon" }.take(SeedPhrase.SEED_PHRASE_SIZE).toList())

        composeTestRule.onNodeWithText(getStringResource(R.string.restore_complete_header)).also {
            it.assertDoesNotExist()
        }
    }

    @Test
    @MediumTest
    fun finish_appears_after_24_words() {
        newTestSetup(SeedPhraseFixture.new().split)

        composeTestRule.onNodeWithText(getStringResource(R.string.restore_complete_header)).also {
            it.assertExists()
        }
    }

    @Test
    @MediumTest
    fun click_take_to_wallet() {
        val testSetup = newTestSetup(SeedPhraseFixture.new().split)

        assertEquals(0, testSetup.getOnFinishedCount())

        composeTestRule.onNodeWithText(getStringResource(R.string.restore_button_see_wallet)).also {
            it.performClick()
        }

        assertEquals(1, testSetup.getOnFinishedCount())
    }

    @Test
    @MediumTest
    fun back() {
        val testSetup = newTestSetup()

        assertEquals(0, testSetup.getOnBackCount())

        composeTestRule.onNodeWithContentDescription(getStringResource(R.string.restore_back_content_description)).also {
            it.performClick()
        }

        assertEquals(1, testSetup.getOnBackCount())
    }

    @Test
    @MediumTest
    fun clear() {
        newTestSetup(listOf("abandon"))

        composeTestRule.onNode(hasText("abandon") and hasTestTag(CommonTag.CHIP), useUnmergedTree = true).also {
            it.assertExists()
        }

        composeTestRule.onNodeWithText(getStringResource(R.string.restore_button_clear)).also {
            it.performClick()
        }

        composeTestRule.onNode(hasText("abandon") and hasTestTag(CommonTag.CHIP), useUnmergedTree = true).also {
            it.assertDoesNotExist()
        }
    }

    private fun newTestSetup(initialState: List<String> = emptyList()) = TestSetup(composeTestRule, initialState)

    private class TestSetup(private val composeTestRule: ComposeContentTestRule, initialState: List<String>) {
        private val state = WordList(initialState)

        private var onBackCount = 0

        private var onFinishedCount = 0

        fun getUserInputWords(): List<String> {
            composeTestRule.waitForIdle()
            return state.current.value
        }

        fun getOnBackCount(): Int {
            composeTestRule.waitForIdle()
            return onBackCount
        }

        fun getOnFinishedCount(): Int {
            composeTestRule.waitForIdle()
            return onFinishedCount
        }

        init {
            composeTestRule.setContent {
                ZcashTheme {
                    RestoreWallet(
                        Mnemonics.getCachedWords(Locale.ENGLISH.language).toSortedSet(),
                        state,
                        onBack = {
                            onBackCount++
                        },
                        paste = { "" },
                        onFinished = {
                            onFinishedCount++
                        },
                    )
                }
            }
        }
    }
}