package com.example.ui.components

import android.net.Uri
import androidx.annotation.OptIn
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
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.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.MusicNote
import androidx.compose.material.icons.filled.Pause
import androidx.compose.material.icons.filled.PlayArrow
import androidx.compose.material.icons.filled.SkipNext
import androidx.compose.material.icons.filled.Videocam
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.LinearProgressIndicator
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.media3.common.util.UnstableApi
import coil.compose.AsyncImage
import com.example.data.model.MediaItemData
import com.example.playback.PlaybackManager
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

@OptIn(UnstableApi::class)
@Composable
fun MiniPlayerBar(
  mediaItem: MediaItemData,
  onClick: () -> Unit,
  modifier: Modifier = Modifier
) {
  val isPlaying by PlaybackManager.isPlaying.collectAsState()
  val positionMs by PlaybackManager.currentPositionMs.collectAsState()
  val durationMs by PlaybackManager.durationMs.collectAsState()

  val progress = if (durationMs > 0) (positionMs.toFloat() / durationMs.toFloat()).coerceIn(0f, 1f) else 0f

  Surface(
    modifier = modifier
      .fillMaxWidth()
      .padding(horizontal = 12.dp, vertical = 6.dp)
      .clip(RoundedCornerShape(14.dp))
      .clickable { onClick() }
      .testTag("mini_player_bar"),
    color = SurfaceElevated,
    shadowElevation = 8.dp
  ) {
    Column {
      LinearProgressIndicator(
        progress = { progress },
        modifier = Modifier
          .fillMaxWidth()
          .height(2.dp),
        color = AccentViolet,
        trackColor = DividerSubtle
      )

      Row(
        modifier = Modifier
          .fillMaxWidth()
          .padding(horizontal = 12.dp, vertical = 8.dp),
        verticalAlignment = Alignment.CenterVertically
      ) {
        // Thumbnail
        Box(
          modifier = Modifier
            .size(44.dp)
            .clip(RoundedCornerShape(8.dp))
            .background(DividerSubtle),
          contentAlignment = Alignment.Center
        ) {
          if (!mediaItem.albumArtUri.isNullOrBlank()) {
            AsyncImage(
              model = Uri.parse(mediaItem.albumArtUri),
              contentDescription = null,
              contentScale = ContentScale.Crop,
              modifier = Modifier.fillMaxSize()
            )
          } else {
            Icon(
              imageVector = if (mediaItem.isVideo) Icons.Default.Videocam else Icons.Default.MusicNote,
              contentDescription = null,
              tint = AccentViolet,
              modifier = Modifier.size(24.dp)
            )
          }
        }

        Spacer(modifier = Modifier.width(12.dp))

        // Title & Artist
        Column(modifier = Modifier.weight(1f)) {
          Text(
            text = mediaItem.title,
            color = TextPrimary,
            fontSize = 14.sp,
            fontWeight = FontWeight.SemiBold,
            maxLines = 1,
            overflow = TextOverflow.Ellipsis
          )
          Text(
            text = if (mediaItem.isVideo) "Video • ${mediaItem.formattedDuration}" else "${mediaItem.artist} • ${mediaItem.formattedDuration}",
            color = TextSecondary,
            fontSize = 12.sp,
            maxLines = 1,
            overflow = TextOverflow.Ellipsis
          )
        }

        // Play/Pause
        IconButton(
          onClick = { PlaybackManager.togglePlayPause() },
          modifier = Modifier.testTag("mini_player_play_pause")
        ) {
          Icon(
            imageVector = if (isPlaying) Icons.Default.Pause else Icons.Default.PlayArrow,
            contentDescription = if (isPlaying) "Pause" else "Play",
            tint = AccentViolet,
            modifier = Modifier.size(28.dp)
          )
        }

        // Next
        IconButton(
          onClick = { PlaybackManager.playNext() },
          modifier = Modifier.testTag("mini_player_next")
        ) {
          Icon(
            imageVector = Icons.Default.SkipNext,
            contentDescription = "Next",
            tint = TextPrimary,
            modifier = Modifier.size(24.dp)
          )
        }
      }
    }
  }
}