package eu.kanade.presentation.webview

import android.content.pm.ApplicationInfo
import android.webkit.CookieManager
import android.webkit.WebView
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.outlined.Close
import androidx.compose.material3.LinearProgressIndicator
import androidx.compose.material3.ProgressIndicatorDefaults
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.produceState
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.Dialog
import com.google.accompanist.web.AccompanistWebViewClient
import com.google.accompanist.web.LoadingState
import com.google.accompanist.web.WebContent
import com.google.accompanist.web.WebView
import com.google.accompanist.web.rememberWebViewNavigator
import com.google.accompanist.web.rememberWebViewState
import eu.kanade.presentation.components.AppBar
import eu.kanade.presentation.components.Button
import eu.kanade.presentation.components.Scaffold
import eu.kanade.tachiyomi.BuildConfig
import eu.kanade.tachiyomi.R
import eu.kanade.tachiyomi.util.system.setDefaultSettings

@Composable
fun EhLoginWebViewScreen(
    onUp: () -> Unit,
    onPageFinished: (view: WebView, url: String) -> Unit,
    onClickRecheckLoginStatus: (loadUrl: (String) -> Unit) -> Unit,
    onClickAlternateLoginPage: (loadUrl: (String) -> Unit) -> Unit,
    onClickSkipPageRestyling: (loadUrl: (String) -> Unit) -> Unit,
    onClickCustomIgneousCookie: () -> Unit,
) {
    val state = rememberWebViewState(
        url = "https://forums.e-hentai.org/index.php?act=Login",
    )
    val navigator = rememberWebViewNavigator()
    val loading by produceState(true) {
        CookieManager.getInstance().removeAllCookies {
            value = false
        }
    }

    Scaffold(
        topBar = {
            Box {
                AppBar(
                    title = "ExHentai login",
                    navigateUp = onUp,
                    navigationIcon = Icons.Outlined.Close,
                )
                when (val loadingState = state.loadingState) {
                    is LoadingState.Initializing -> LinearProgressIndicator(
                        modifier = Modifier
                            .fillMaxWidth()
                            .align(Alignment.BottomCenter),
                    )
                    is LoadingState.Loading -> {
                        val animatedProgress by animateFloatAsState(
                            (loadingState as? LoadingState.Loading)?.progress ?: 1f,
                            animationSpec = ProgressIndicatorDefaults.ProgressAnimationSpec,
                        )
                        LinearProgressIndicator(
                            progress = animatedProgress,
                            modifier = Modifier
                                .fillMaxWidth()
                                .align(Alignment.BottomCenter),
                        )
                    }
                    else -> {}
                }
            }
        },
    ) { contentPadding ->

        if (loading) {
            return@Scaffold
        }

        val webClient = remember {
            object : AccompanistWebViewClient() {
                override fun onPageFinished(view: WebView?, url: String?) {
                    super.onPageFinished(view, url)
                    onPageFinished(view ?: return, url ?: return)
                }
            }
        }
        var showAdvancedOptions by remember {
            mutableStateOf(false)
        }

        Box(Modifier.padding(contentPadding)) {
            Box {
                WebView(
                    state = state,
                    navigator = navigator,
                    modifier = Modifier.padding(bottom = 48.dp),
                    onCreated = { webView ->
                        webView.setDefaultSettings()

                        // Debug mode (chrome://inspect/#devices)
                        if (BuildConfig.DEBUG &&
                            0 != webView.context.applicationInfo.flags and ApplicationInfo.FLAG_DEBUGGABLE
                        ) {
                            WebView.setWebContentsDebuggingEnabled(true)
                        }
                    },
                    client = webClient,
                )
                Row(
                    Modifier
                        .fillMaxWidth()
                        .height(48.dp)
                        .align(Alignment.BottomCenter),
                    horizontalArrangement = Arrangement.SpaceBetween,
                ) {
                    Button(onClick = onUp, Modifier.weight(0.5F)) {
                        Text(text = stringResource(android.R.string.cancel))
                    }
                    Button(onClick = { showAdvancedOptions = true }, Modifier.weight(0.5F)) {
                        Text(text = stringResource(R.string.pref_category_advanced))
                    }
                }
            }
            if (showAdvancedOptions) {
                Box(Modifier.background(Color(0xb5000000))) {
                    Dialog(onDismissRequest = { showAdvancedOptions = false }) {
                        fun loadUrl(url: String) {
                            state.content = WebContent.Url(url)
                        }
                        Column(Modifier.fillMaxWidth(0.8F)) {
                            Button(
                                onClick = {
                                    onClickRecheckLoginStatus(::loadUrl)
                                    showAdvancedOptions = false
                                },
                                modifier = Modifier.fillMaxWidth(),
                            ) {
                                Text(text = stringResource(R.string.recheck_login_status))
                            }
                            Button(
                                onClick = {
                                    onClickAlternateLoginPage(::loadUrl)
                                    showAdvancedOptions = false
                                },
                                modifier = Modifier.fillMaxWidth(),
                            ) {
                                Text(text = stringResource(R.string.alternative_login_page))
                            }
                            Button(
                                onClick = {
                                    onClickSkipPageRestyling(::loadUrl)
                                    showAdvancedOptions = false
                                },
                                modifier = Modifier.fillMaxWidth(),
                            ) {
                                Text(text = stringResource(R.string.skip_page_restyling))
                            }
                            Button(
                                onClick = {
                                    onClickCustomIgneousCookie()
                                    showAdvancedOptions = false
                                },
                                modifier = Modifier.fillMaxWidth(),
                            ) {
                                Text(text = stringResource(R.string.custom_igneous_cookie))
                            }
                            Button(onClick = { showAdvancedOptions = false }, Modifier.fillMaxWidth()) {
                                Text(text = stringResource(android.R.string.cancel))
                            }
                        }
                    }
                }
            }
        }
    }
}