package io.oxygenhub.android.ui.repos

import android.content.ClipData

import androidx.compose.foundation.layout.Column

import androidx.compose.foundation.layout.Arrangement

import androidx.compose.foundation.text.selection.SelectionContainer

import androidx.compose.material3.AlertDialog

import androidx.compose.material3.MaterialTheme

import androidx.compose.material3.Text

import androidx.compose.material3.TextButton

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.rememberCoroutineScope

import androidx.compose.runtime.setValue

import androidx.compose.ui.platform.ClipEntry

import androidx.compose.ui.platform.LocalClipboard

import androidx.compose.ui.text.font.FontFamily

import androidx.compose.ui.unit.dp

import io.oxygenhub.android.api.userMessage

import kotlinx.coroutines.launch

/** The command that clones a repository at [url] with oxy. */

fun cloneCommand(url: String): String = "oxy clone $url"

/**

 * How to clone the repository (#3): its `oxy clone` command, selectable,

 * and a button that copies it. [cloneUrl] fetches the address.

 */

@Composable

fun CloneDialog(cloneUrl: suspend () -> String, onDismiss: () -> Unit) {

    val url by produceState<Result<String>?>(null) { value = runCatching { cloneUrl() } }

    val clipboard = LocalClipboard.current

    val scope = rememberCoroutineScope()

    var copied by remember { mutableStateOf(false) }

    val command = url?.getOrNull()?.takeIf { it.isNotEmpty() }?.let(::cloneCommand)

    AlertDialog(

        onDismissRequest = onDismiss,

        title = { Text("Clone") },

        text = {

            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {

                when {

                    url == null -> Text("Finding its address…")

                    command == null -> Text(url?.exceptionOrNull()?.userMessage() ?: "The hub gave no clone address.")

                    else -> {

                        SelectionContainer { Text(command, fontFamily = FontFamily.Monospace) }

                        Text(

                            "In a terminal with oxy installed. A private repository asks for your sign-in.",

                            style = MaterialTheme.typography.bodySmall,

                            color = MaterialTheme.colorScheme.onSurfaceVariant,

                        )

                    }

                }

            }

        },

        confirmButton = {

            TextButton(

                enabled = command != null,

                onClick = {

                    val text = command ?: return@TextButton

                    scope.launch {

                        clipboard.setClipEntry(ClipEntry(ClipData.newPlainText("oxy clone", text)))

                        copied = true

                    }

                },

            ) { Text(if (copied) "Copied" else "Copy") }

        },

        dismissButton = { TextButton(onClick = onDismiss) { Text("Close") } },

    )

}