package com.example.ui.components

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.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Add
import androidx.compose.material.icons.filled.PlaylistAdd
import androidx.compose.material.icons.filled.QueueMusic
import androidx.compose.material3.AlertDialog
import androidx.compose.material3.Button
import androidx.compose.material3.ButtonDefaults
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.OutlinedTextField
import androidx.compose.material3.OutlinedTextFieldDefaults
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.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.example.data.db.PlaylistEntity
import com.example.data.model.MediaItemData
import com.example.ui.theme.AccentViolet
import com.example.ui.theme.DividerSubtle
import com.example.ui.theme.SurfaceElevated
import com.example.ui.theme.TextPrimary
import com.example.ui.theme.TextSecondary

@Composable
fun CreatePlaylistDialog(
  onDismiss: () -> Unit,
  onConfirm: (String) -> Unit
) {
  var playlistName by remember { mutableStateOf("") }

  AlertDialog(
    onDismissRequest = onDismiss,
    confirmButton = {
      Button(
        onClick = {
          if (playlistName.isNotBlank()) {
            onConfirm(playlistName)
            onDismiss()
          }
        },
        enabled = playlistName.isNotBlank(),
        colors = ButtonDefaults.buttonColors(containerColor = AccentViolet),
        modifier = Modifier.testTag("create_playlist_confirm_btn")
      ) {
        Text("Create", color = Color.Black, fontWeight = FontWeight.Bold)
      }
    },
    dismissButton = {
      TextButton(onClick = onDismiss) {
        Text("Cancel", color = TextSecondary)
      }
    },
    title = {
      Row(verticalAlignment = Alignment.CenterVertically) {
        Icon(imageVector = Icons.Default.PlaylistAdd, contentDescription = null, tint = AccentViolet)
        Spacer(modifier = Modifier.width(8.dp))
        Text("New Playlist", color = TextPrimary, fontWeight = FontWeight.Bold)
      }
    },
    text = {
      Column {
        Text("Enter playlist name", color = TextSecondary, fontSize = 13.sp)
        Spacer(modifier = Modifier.height(12.dp))
        OutlinedTextField(
          value = playlistName,
          onValueChange = { playlistName = it },
          singleLine = true,
          placeholder = { Text("e.g. Chill Beats", color = TextSecondary) },
          colors = OutlinedTextFieldDefaults.colors(
            focusedBorderColor = AccentViolet,
            unfocusedBorderColor = DividerSubtle,
            focusedTextColor = TextPrimary,
            unfocusedTextColor = TextPrimary
          ),
          modifier = Modifier
            .fillMaxWidth()
            .testTag("playlist_name_input")
        )
      }
    },
    containerColor = SurfaceElevated,
    shape = RoundedCornerShape(16.dp),
    modifier = Modifier.testTag("create_playlist_dialog")
  )
}

@Composable
fun AddToPlaylistDialog(
  item: MediaItemData,
  playlists: List<PlaylistEntity>,
  onCreateNewClick: () -> Unit,
  onSelectPlaylist: (Long) -> Unit,
  onDismiss: () -> Unit
) {
  AlertDialog(
    onDismissRequest = onDismiss,
    confirmButton = {},
    dismissButton = {
      TextButton(onClick = onDismiss) {
        Text("Cancel", color = TextSecondary)
      }
    },
    title = {
      Text("Add to Playlist", color = TextPrimary, fontWeight = FontWeight.Bold)
    },
    text = {
      Column(modifier = Modifier.fillMaxWidth()) {
        Row(
          modifier = Modifier
            .fillMaxWidth()
            .clickable {
              onDismiss()
              onCreateNewClick()
            }
            .padding(vertical = 12.dp),
          verticalAlignment = Alignment.CenterVertically
        ) {
          Icon(imageVector = Icons.Default.Add, contentDescription = null, tint = AccentViolet)
          Spacer(modifier = Modifier.width(12.dp))
          Text("Create New Playlist", color = AccentViolet, fontWeight = FontWeight.SemiBold)
        }

        if (playlists.isEmpty()) {
          Text(
            text = "No playlists created yet.",
            color = TextSecondary,
            fontSize = 13.sp,
            modifier = Modifier.padding(vertical = 8.dp)
          )
        } else {
          LazyColumn(modifier = Modifier.fillMaxWidth()) {
            items(playlists) { pl ->
              Row(
                modifier = Modifier
                  .fillMaxWidth()
                  .clickable {
                    onSelectPlaylist(pl.playlistId)
                    onDismiss()
                  }
                  .padding(vertical = 10.dp),
                verticalAlignment = Alignment.CenterVertically
              ) {
                Icon(imageVector = Icons.Default.QueueMusic, contentDescription = null, tint = TextSecondary)
                Spacer(modifier = Modifier.width(12.dp))
                Text(text = pl.name, color = TextPrimary, fontSize = 14.sp)
              }
            }
          }
        }
      }
    },
    containerColor = SurfaceElevated,
    shape = RoundedCornerShape(16.dp),
    modifier = Modifier.testTag("add_to_playlist_dialog")
  )
}