package com.peachpasswords.ui.vault

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
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.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.navigationBarsPadding
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.ModalBottomSheet
import androidx.compose.material3.Text
import androidx.compose.material3.rememberModalBottomSheetState
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.peachpasswords.ui.theme.LocalPeachAccent
import com.peachpasswords.ui.theme.peachColors
import com.peachpasswords.ui.theme.PeachType
import com.peachpasswords.vault.VaultEntry
import com.peachpasswords.vault.hasTOTP

/**
 * D12 long-press context menu (spec §9). A glass ModalBottomSheet over an entry
 * row offering quick copy / edit / trash without opening the detail screen.
 *
 * Self-contained, drop-in. Triggered from VaultListScreen on a 500ms long-press
 * (see INTEGRATION.md for the pointerInput anchor). Callbacks are wired to the
 * VM in the host; this composable owns no business logic.
 */
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun ContextMenuSheet(
    entry: VaultEntry,
    onCopyPassword: () -> Unit,
    onCopyUsername: () -> Unit,
    onCopyTotp: () -> Unit,
    onEdit: () -> Unit,
    onMoveToTrash: () -> Unit,
    onDismiss: () -> Unit,
) {
    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)

    ModalBottomSheet(
        onDismissRequest = onDismiss,
        sheetState = sheetState,
        containerColor = peachColors.SurfaceElevated,
        dragHandle = null,
    ) {
        Column(
            Modifier
                .fillMaxWidth()
                .padding(top = 8.dp)
                .navigationBarsPadding(),
        ) {
            // Entry name header — non-interactive title.
            Text(
                text = entry.title,
                color = peachColors.T0,
                style = PeachType.entryNameList.copy(fontSize = 15.sp),
                modifier = Modifier.padding(horizontal = 20.dp, vertical = 12.dp),
            )
            Divider()

            val username = entry.username ?: entry.email
            if (!entry.password.isNullOrEmpty()) {
                ActionRow(label = "Copy password", onClick = { onCopyPassword(); onDismiss() })
            }
            if (!username.isNullOrEmpty()) {
                ActionRow(label = "Copy username", onClick = { onCopyUsername(); onDismiss() })
            }
            if (entry.hasTOTP()) {
                ActionRow(label = "Copy TOTP code", onClick = { onCopyTotp(); onDismiss() })
            }
            ActionRow(label = "Edit", onClick = { onEdit(); onDismiss() })
            ActionRow(
                label = "Move to trash",
                textColor = peachColors.Breach,
                onClick = { onMoveToTrash(); onDismiss() },
            )

            Divider()
            CancelRow(onClick = onDismiss)
            Spacer(Modifier.height(4.dp))
        }
    }
}

@Composable
private fun Divider() {
    Box(
        Modifier
            .fillMaxWidth()
            .height(1.dp)
            .background(peachColors.T3),
    )
}

/**
 * A single action row: 44dp min height, IBM Plex Mono 12sp, with a 2dp accent
 * left-border that fades in on press (the spec's "accent left-border on press").
 */
@Composable
private fun ActionRow(
    label: String,
    textColor: Color = peachColors.T0,
    onClick: () -> Unit,
) {
    val accent = LocalPeachAccent.current
    val interaction = remember { MutableInteractionSource() }
    val pressed by interaction.collectIsPressedAsState()
    Row(
        modifier = Modifier
            .fillMaxWidth()
            .heightIn(min = 44.dp)
            .clickable(interactionSource = interaction, indication = null, onClick = onClick)
            .background(if (pressed) peachColors.T4 else Color.Transparent)
            .drawBehind {
                if (pressed) {
                    drawRect(
                        color = accent,
                        topLeft = Offset.Zero,
                        size = Size(2.dp.toPx(), size.height),
                    )
                }
            }
            .padding(horizontal = 20.dp, vertical = 12.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Text(
            text = label,
            color = textColor,
            style = PeachType.bodyMono.copy(fontSize = 12.sp),
        )
    }
}

@Composable
private fun CancelRow(onClick: () -> Unit) {
    Row(
        modifier = Modifier
            .fillMaxWidth()
            .heightIn(min = 44.dp)
            .clickable(onClick = onClick)
            .padding(horizontal = 20.dp, vertical = 12.dp),
        horizontalArrangement = Arrangement.Center,
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Text(
            text = "Cancel",
            color = peachColors.T2,
            style = PeachType.labelMono.copy(fontSize = 11.sp),
            textAlign = TextAlign.Center,
        )
    }
}