package com.garfiec.librechat.navigation

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.statusBarsPadding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.automirrored.filled.ArrowBack
import androidx.compose.material.icons.automirrored.filled.Chat
import androidx.compose.material.icons.filled.AccountCircle
import androidx.compose.material.icons.filled.Settings
import androidx.compose.material.icons.filled.Storage
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.garfiec.librechat.R

/**
 * Settings sidebar content shown when the sidebar mode is [SidebarMode.Settings].
 * Displays a simple vertical list of settings categories. Tapping a category
 * navigates to its sub-page in the main content area.
 */
@Composable
fun SettingsSidebarContent(
    selectedCategory: SettingsCategory?,
    onBackToConversations: () -> Unit,
    onCategorySelected: (SettingsCategory) -> Unit,
    modifier: Modifier = Modifier,
) {
    Column(
        modifier = modifier
            .fillMaxHeight()
            .width(300.dp)
            .statusBarsPadding()
            .padding(top = 8.dp),
    ) {
        // Header with back arrow
        Row(
            modifier = Modifier
                .fillMaxWidth()
                .padding(horizontal = 4.dp, vertical = 4.dp),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            IconButton(onClick = onBackToConversations) {
                Icon(
                    imageVector = Icons.AutoMirrored.Filled.ArrowBack,
                    contentDescription = stringResource(R.string.cd_back_to_conversations),
                )
            }
            Text(
                text = stringResource(R.string.settings),
                style = MaterialTheme.typography.titleMedium,
                modifier = Modifier
                    .weight(1f)
                    .semantics { heading() },
            )
        }

        Spacer(modifier = Modifier.padding(top = 8.dp))

        // Category list
        SettingsCategoryItem(
            icon = Icons.Default.Settings,
            category = SettingsCategory.GENERAL,
            isSelected = selectedCategory == SettingsCategory.GENERAL,
            onClick = { onCategorySelected(SettingsCategory.GENERAL) },
        )
        SettingsCategoryItem(
            icon = Icons.AutoMirrored.Filled.Chat,
            category = SettingsCategory.CHAT,
            isSelected = selectedCategory == SettingsCategory.CHAT,
            onClick = { onCategorySelected(SettingsCategory.CHAT) },
        )
        SettingsCategoryItem(
            icon = Icons.Default.AccountCircle,
            category = SettingsCategory.ACCOUNT,
            isSelected = selectedCategory == SettingsCategory.ACCOUNT,
            onClick = { onCategorySelected(SettingsCategory.ACCOUNT) },
        )
        SettingsCategoryItem(
            icon = Icons.Default.Storage,
            category = SettingsCategory.DATA,
            isSelected = selectedCategory == SettingsCategory.DATA,
            onClick = { onCategorySelected(SettingsCategory.DATA) },
        )

        Spacer(modifier = Modifier.weight(1f))
    }
}

@Composable
private fun SettingsCategoryItem(
    icon: ImageVector,
    category: SettingsCategory,
    isSelected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
) {
    val backgroundColor = if (isSelected) {
        MaterialTheme.colorScheme.secondaryContainer
    } else {
        MaterialTheme.colorScheme.surface
    }
    val contentColor = if (isSelected) {
        MaterialTheme.colorScheme.onSecondaryContainer
    } else {
        MaterialTheme.colorScheme.onSurface
    }

    Row(
        modifier = modifier
            .fillMaxWidth()
            .padding(horizontal = 12.dp, vertical = 2.dp)
            .clip(RoundedCornerShape(12.dp))
            .background(backgroundColor, RoundedCornerShape(12.dp))
            .clickable(onClick = onClick)
            .padding(horizontal = 16.dp, vertical = 14.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        Icon(
            imageVector = icon,
            contentDescription = null,
            modifier = Modifier.size(22.dp),
            tint = contentColor,
        )
        Spacer(modifier = Modifier.width(16.dp))
        Text(
            text = category.label,
            style = MaterialTheme.typography.bodyLarge,
            color = contentColor,
        )
    }
}