/*
 * Copyright 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.cbnu.cats.ui.components

import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.ArrowBack
import androidx.compose.material.icons.filled.MoreVert
import androidx.compose.material.icons.filled.Search
import androidx.compose.material3.DockedSearchBar
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.FilledIconButton
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.IconButtonDefaults
import androidx.compose.material3.ListItem
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBar
import androidx.compose.material3.TopAppBarDefaults
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateListOf
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import com.cbnu.cats.R
import com.cbnu.cats.data.Email

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun ReplyDockedSearchBar(
    emails: List<Email>,
    onSearchItemSelected: (Email) -> Unit,
    modifier: Modifier = Modifier
) {
    var query by remember { mutableStateOf("") }
    var active by remember { mutableStateOf(false) }
    val searchResults = remember { mutableStateListOf<Email>() }

    LaunchedEffect(query) {
        searchResults.clear()
        if (query.isNotEmpty()) {
            searchResults.addAll(
                emails.filter {
                    it.subject.startsWith(
                        prefix = query,
                        ignoreCase = true
                    ) || it.sender.fullName.startsWith(
                        prefix =
                        query,
                        ignoreCase = true
                    )
                }
            )
        }
    }

    DockedSearchBar(
        modifier = modifier,
        query = query,
        onQueryChange = {
            query = it
        },
        onSearch = { active = false },
        active = active,
        onActiveChange = {
            active = it
        },
        placeholder = { Text(text = stringResource(id = R.string.search_emails)) },
        leadingIcon = {
            if (active) {
                Icon(
                    imageVector = Icons.Default.ArrowBack,
                    contentDescription = stringResource(id = R.string.back_button),
                    modifier = Modifier
                        .padding(start = 16.dp)
                        .clickable {
                            active = false
                            query = ""
                        },
                )
            } else {
                Icon(
                    imageVector = Icons.Default.Search,
                    contentDescription = stringResource(id = R.string.search),
                    modifier = Modifier.padding(start = 16.dp),
                )
            }
        },
        trailingIcon = {
            ReplyProfileImage(
                drawableResource = R.drawable.avatar_6,
                description = stringResource(id = R.string.profile),
                modifier = Modifier
                    .padding(12.dp)
                    .size(32.dp)
            )
        },
    ) {
        if (searchResults.isNotEmpty()) {
            LazyColumn(
                modifier = Modifier.fillMaxWidth(),
                contentPadding = PaddingValues(16.dp),
                verticalArrangement = Arrangement.spacedBy(4.dp)
            ) {
                items(items = searchResults, key = { it.id }) { email ->
                    ListItem(
                        headlineContent = { Text(email.subject) },
                        supportingContent = { Text(email.sender.fullName) },
                        leadingContent = {
                            ReplyProfileImage(
                                drawableResource = email.sender.avatar,
                                description = stringResource(id = R.string.profile),
                                modifier = Modifier
                                    .size(32.dp)
                            )
                        },
                        modifier = Modifier.clickable {
                            onSearchItemSelected.invoke(email)
                            query = ""
                            active = false
                        }
                    )
                }
            }
        } else if (query.isNotEmpty()) {
            Text(
                text = stringResource(id = R.string.no_item_found),
                modifier = Modifier.padding(16.dp)
            )
        } else
            Text(
                text = stringResource(id = R.string.no_search_history),
                modifier = Modifier.padding(16.dp)
            )
    }
}

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun EmailDetailAppBar(
    email: Email,
    isFullScreen: Boolean,
    modifier: Modifier = Modifier,
    onBackPressed: () -> Unit
) {
    TopAppBar(
        modifier = modifier,
        colors = TopAppBarDefaults.smallTopAppBarColors(
            containerColor = MaterialTheme.colorScheme.inverseOnSurface
        ),
        title = {
            Column(
                modifier = Modifier.fillMaxWidth(),
                horizontalAlignment = if (isFullScreen) Alignment.CenterHorizontally
                else Alignment.Start
            ) {
                Text(
                    text = email.subject,
                    style = MaterialTheme.typography.titleMedium,
                    color = MaterialTheme.colorScheme.onSurfaceVariant
                )
                Text(
                    modifier = Modifier.padding(top = 4.dp),
                    text = "${email.threads.size} ${stringResource(id = R.string.messages)}",
                    style = MaterialTheme.typography.labelMedium,
                    color = MaterialTheme.colorScheme.outline
                )
            }
        },
        navigationIcon = {
            if (isFullScreen) {
                FilledIconButton(
                    onClick = onBackPressed,
                    modifier = Modifier.padding(8.dp),
                    colors = IconButtonDefaults.filledIconButtonColors(
                        containerColor = MaterialTheme.colorScheme.surface,
                        contentColor = MaterialTheme.colorScheme.onSurface
                    )
                ) {
                    Icon(
                        imageVector = Icons.Default.ArrowBack,
                        contentDescription = stringResource(id = R.string.back_button),
                        modifier = Modifier.size(14.dp)
                    )
                }
            }
        },
        actions = {
            IconButton(
                onClick = { /*TODO*/ },
            ) {
                Icon(
                    imageVector = Icons.Default.MoreVert,
                    contentDescription = stringResource(id = R.string.more_options_button),
                    tint = MaterialTheme.colorScheme.onSurfaceVariant
                )
            }
        }
    )
}