package solutions.tretter.githugandroid

import androidx.compose.foundation.background
import androidx.compose.foundation.horizontalScroll
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.fillMaxSize
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.imePadding
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.sizeIn
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicTextField
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.foundation.verticalScroll
import androidx.compose.material3.Button
import androidx.compose.material3.ButtonDefaults
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.focus.FocusRequester
import androidx.compose.ui.focus.focusRequester
import androidx.compose.ui.graphics.SolidColor
import androidx.compose.ui.platform.LocalSoftwareKeyboardController
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.compose.ui.window.Dialog
import androidx.compose.ui.window.DialogProperties

data class GitMessageEditorState(
    val invocation: GitEditorInvocation,
    val content: String,
)

@Composable
fun GitMessageEditorDialog(
    state: GitMessageEditorState,
    onContentChange: (String) -> Unit,
    onClose: () -> Unit,
    onSave: () -> Unit,
) {
    val horizontalScroll = rememberScrollState()
    val verticalScroll = rememberScrollState()
    val dialogScroll = rememberScrollState()
    val contentFocusRequester = remember { FocusRequester() }
    val keyboardController = LocalSoftwareKeyboardController.current

    LaunchedEffect(state.invocation.command) {
        runCatching { contentFocusRequester.requestFocus() }
        keyboardController?.show()
    }

    Dialog(
        onDismissRequest = onClose,
        properties = DialogProperties(usePlatformDefaultWidth = false),
    ) {
        Box(
            modifier = Modifier
                .fillMaxSize()
                .imePadding()
                .verticalScroll(dialogScroll)
                .padding(12.dp),
        ) {
            Surface(
                modifier = Modifier
                    .fillMaxWidth()
                    .heightIn(min = 360.dp, max = 720.dp),
                color = PanelPrimary,
                shape = RoundedCornerShape(8.dp),
            ) {
                Column(
                    modifier = Modifier.padding(12.dp),
                    verticalArrangement = Arrangement.spacedBy(10.dp),
                ) {
                    Text(
                        text = state.invocation.title,
                        modifier = Modifier.testTag("git-message-editor-title"),
                        color = TextPrimary,
                        fontWeight = FontWeight.Bold,
                        fontSize = 20.sp,
                    )
                    Row(
                        modifier = Modifier.fillMaxWidth(),
                        horizontalArrangement = Arrangement.spacedBy(8.dp),
                    ) {
                        EditorButton(
                            label = "Save",
                            enabled = state.content.isNotBlank(),
                            modifier = Modifier.testTag("git-message-editor-save"),
                            onClick = onSave,
                        )
                        EditorButton(
                            label = "Dismiss",
                            modifier = Modifier.testTag("git-message-editor-dismiss"),
                            onClick = onClose,
                        )
                    }
                    Text(
                        text = state.invocation.displayPath,
                        modifier = Modifier.testTag("git-message-editor-path"),
                        color = TextSecondary,
                        fontFamily = FontFamily.Monospace,
                        fontSize = 13.sp,
                    )
                    Box(
                        modifier = Modifier
                            .fillMaxWidth()
                            .weight(1f)
                            .heightIn(min = 260.dp)
                            .background(TerminalBackground, RoundedCornerShape(6.dp))
                            .padding(10.dp)
                            .horizontalScroll(horizontalScroll)
                            .verticalScroll(verticalScroll),
                    ) {
                        BasicTextField(
                            value = state.content,
                            onValueChange = onContentChange,
                            modifier = Modifier
                                .sizeIn(minWidth = 1200.dp, minHeight = 1200.dp)
                                .focusRequester(contentFocusRequester)
                                .testTag("git-message-editor-content"),
                            textStyle = TextStyle(
                                color = TextPrimary,
                                fontFamily = FontFamily.Monospace,
                                fontSize = 14.sp,
                            ),
                            cursorBrush = SolidColor(Accent),
                            keyboardOptions = KeyboardOptions(
                                autoCorrect = false,
                                keyboardType = KeyboardType.Ascii,
                            ),
                        )
                    }
                }
            }
        }
    }
}

@Composable
private fun EditorButton(
    label: String,
    enabled: Boolean = true,
    modifier: Modifier = Modifier,
    onClick: () -> Unit,
) {
    Button(
        onClick = onClick,
        enabled = enabled,
        modifier = modifier,
        colors = ButtonDefaults.buttonColors(
            containerColor = Accent,
            contentColor = AppBackground,
            disabledContainerColor = PanelTertiary,
            disabledContentColor = TextMuted,
        ),
    ) {
        Text(label)
    }
}