package co.electriccoin.zcash.ui.screen.seed.view

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.ArrowBack
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBar
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.tooling.preview.Preview
import cash.z.ecc.android.sdk.model.PersistableWallet
import cash.z.ecc.sdk.fixture.PersistableWalletFixture
import co.electriccoin.zcash.ui.BuildConfig
import co.electriccoin.zcash.ui.R
import co.electriccoin.zcash.ui.common.SecureScreen
import co.electriccoin.zcash.ui.design.component.Body
import co.electriccoin.zcash.ui.design.component.ChipGrid
import co.electriccoin.zcash.ui.design.component.GradientSurface
import co.electriccoin.zcash.ui.design.component.TertiaryButton
import co.electriccoin.zcash.ui.design.theme.ZcashTheme
import kotlinx.collections.immutable.toPersistentList

@Preview("Seed")
@Composable
private fun PreviewSeed() {
    ZcashTheme(darkTheme = false) {
        GradientSurface {
            Seed(
                persistableWallet = PersistableWalletFixture.new(),
                onBack = {},
                onCopyToClipboard = {}
            )
        }
    }
}

/*
 * Note we have some things to determine regarding locking of the secrets for persistableWallet
 * (e.g. seed phrase and spending keys) which should require additional authorization to view.
 */
@Composable
fun Seed(
    persistableWallet: PersistableWallet,
    onBack: () -> Unit,
    onCopyToClipboard: () -> Unit
) {
    if (BuildConfig.IS_SECURE_SCREEN_ENABLED) {
        SecureScreen()
    }
    Scaffold(topBar = {
        SeedTopAppBar(onBack = onBack)
    }) { paddingValues ->
        SeedMainContent(
            persistableWallet = persistableWallet,
            onCopyToClipboard = onCopyToClipboard,
            modifier = Modifier.padding(
                top = paddingValues.calculateTopPadding() + ZcashTheme.dimens.spacingDefault,
                bottom = paddingValues.calculateBottomPadding() + ZcashTheme.dimens.spacingDefault,
                start = ZcashTheme.dimens.spacingDefault,
                end = ZcashTheme.dimens.spacingDefault
            )
        )
    }
}

@Composable
@OptIn(ExperimentalMaterial3Api::class)
private fun SeedTopAppBar(onBack: () -> Unit) {
    TopAppBar(
        title = { Text(text = stringResource(id = R.string.seed_title)) },
        navigationIcon = {
            IconButton(
                onClick = onBack
            ) {
                Icon(
                    imageVector = Icons.Filled.ArrowBack,
                    contentDescription = stringResource(R.string.seed_back_content_description)
                )
            }
        }
    )
}

@Composable
private fun SeedMainContent(
    persistableWallet: PersistableWallet,
    onCopyToClipboard: () -> Unit,
    modifier: Modifier = Modifier
) {
    Column(
        Modifier
            .fillMaxHeight()
            .verticalScroll(
                rememberScrollState()
            )
            .then(modifier)
    ) {
        Body(stringResource(R.string.seed_body))

        Spacer(modifier = Modifier.height(ZcashTheme.dimens.spacingDefault))

        ChipGrid(persistableWallet.seedPhrase.split.toPersistentList())

        TertiaryButton(
            onClick = onCopyToClipboard,
            text = stringResource(R.string.seed_copy),
            outerPaddingValues = PaddingValues(
                horizontal = ZcashTheme.dimens.spacingNone,
                vertical = ZcashTheme.dimens.spacingSmall
            )
        )
    }
}