use axum::{
  Json,
  extract::{Path, Query, State},
};
use pinakes_core::{
  model::{MediaId, Pagination},
  storage::DynStorageBackend,
};
use uuid::Uuid;

use crate::{
  dto::{
    BatchCollectionRequest,
    BatchDeleteRequest,
    BatchImportItemResult,
    BatchImportRequest,
    BatchImportResponse,
    BatchMoveRequest,
    BatchOperationResponse,
    BatchTagRequest,
    BatchUpdateRequest,
    DirectoryImportRequest,
    DirectoryPreviewFile,
    DirectoryPreviewResponse,
    EmptyTrashResponse,
    ImportRequest,
    ImportResponse,
    ImportWithOptionsRequest,
    MediaCountResponse,
    MediaResponse,
    MoveMediaRequest,
    PaginationParams,
    RenameMediaRequest,
    SetCustomFieldRequest,
    TrashInfoResponse,
    TrashResponse,
    UpdateMediaRequest,
  },
  error::ApiError,
  state::AppState,
};

/// Apply tags and add to collection after a successful import.
/// Shared logic used by `import_with_options`, `batch_import`, and
/// `import_directory_endpoint`.
async fn apply_import_post_processing(
  storage: &DynStorageBackend,
  media_id: MediaId,
  tag_ids: Option<&[Uuid]>,
  new_tags: Option<&[String]>,
  collection_id: Option<Uuid>,
) {
  if let Some(tag_ids) = tag_ids {
    for tid in tag_ids {
      if let Err(e) =
        pinakes_core::tags::tag_media(storage, media_id, *tid).await
      {
        tracing::warn!(error = %e, "failed to apply tag during import");
      }
    }
  }
  if let Some(new_tags) = new_tags {
    for name in new_tags {
      match pinakes_core::tags::create_tag(storage, name, None).await {
        Ok(tag) => {
          if let Err(e) =
            pinakes_core::tags::tag_media(storage, media_id, tag.id).await
          {
            tracing::warn!(error = %e, "failed to apply new tag during import");
          }
        },
        Err(e) => {
          tracing::warn!(tag_name = %name, error = %e, "failed to create tag during import");
        },
      }
    }
  }
  if let Some(col_id) = collection_id
    && let Err(e) =
      pinakes_core::collections::add_member(storage, col_id, media_id, 0).await
  {
    tracing::warn!(error = %e, "failed to add to collection during import");
  }
}

pub async fn import_media(
  State(state): State<AppState>,
  Json(req): Json<ImportRequest>,
) -> Result<Json<ImportResponse>, ApiError> {
  let result = pinakes_core::import::import_file(
    &state.storage,
    &req.path,
    state.plugin_pipeline.as_ref(),
  )
  .await?;

  if let Some(ref dispatcher) = state.webhook_dispatcher {
    let id = result.media_id.0.to_string();
    dispatcher.dispatch(pinakes_core::webhooks::WebhookEvent::MediaCreated {
      media_id: id.clone(),
    });
    dispatcher.dispatch(
      pinakes_core::webhooks::WebhookEvent::ImportCompleted { media_id: id },
    );
  }

  Ok(Json(ImportResponse {
    media_id:      result.media_id.0.to_string(),
    was_duplicate: result.was_duplicate,
  }))
}

pub async fn list_media(
  State(state): State<AppState>,
  Query(params): Query<PaginationParams>,
) -> Result<Json<Vec<MediaResponse>>, ApiError> {
  let pagination = Pagination::new(
    params.offset.unwrap_or(0),
    params.limit.unwrap_or(50).min(1000),
    params.sort,
  );
  let items = state.storage.list_media(&pagination).await?;
  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(
    items
      .into_iter()
      .map(|item| MediaResponse::new(item, &roots))
      .collect(),
  ))
}

pub async fn get_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<Json<MediaResponse>, ApiError> {
  let item = state.storage.get_media(MediaId(id)).await?;
  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(MediaResponse::new(item, &roots)))
}

/// Maximum length for short text fields (title, artist, album, genre).
const MAX_SHORT_TEXT: usize = 500;
/// Maximum length for long text fields (description).
const MAX_LONG_TEXT: usize = 10_000;

fn validate_optional_text(
  field: &Option<String>,
  name: &str,
  max: usize,
) -> Result<(), ApiError> {
  if let Some(v) = field
    && v.len() > max
  {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(format!(
        "{name} exceeds {max} characters"
      )),
    ));
  }
  Ok(())
}

pub async fn update_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  Json(req): Json<UpdateMediaRequest>,
) -> Result<Json<MediaResponse>, ApiError> {
  validate_optional_text(&req.title, "title", MAX_SHORT_TEXT)?;
  validate_optional_text(&req.artist, "artist", MAX_SHORT_TEXT)?;
  validate_optional_text(&req.album, "album", MAX_SHORT_TEXT)?;
  validate_optional_text(&req.genre, "genre", MAX_SHORT_TEXT)?;
  validate_optional_text(&req.description, "description", MAX_LONG_TEXT)?;

  let mut item = state.storage.get_media(MediaId(id)).await?;

  if let Some(title) = req.title {
    item.title = Some(title);
  }
  if let Some(artist) = req.artist {
    item.artist = Some(artist);
  }
  if let Some(album) = req.album {
    item.album = Some(album);
  }
  if let Some(genre) = req.genre {
    item.genre = Some(genre);
  }
  if let Some(year) = req.year {
    item.year = Some(year);
  }
  if let Some(description) = req.description {
    item.description = Some(description);
  }
  item.updated_at = chrono::Utc::now();

  state.storage.update_media(&item).await?;
  pinakes_core::audit::record_action(
    &state.storage,
    Some(item.id),
    pinakes_core::model::AuditAction::Updated,
    None,
  )
  .await?;

  if let Some(ref dispatcher) = state.webhook_dispatcher {
    dispatcher.dispatch(pinakes_core::webhooks::WebhookEvent::MediaUpdated {
      media_id: item.id.0.to_string(),
    });
  }

  state.emit_plugin_event(
    "MediaUpdated",
    &serde_json::json!({"media_id": item.id.to_string()}),
  );

  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(MediaResponse::new(item, &roots)))
}

pub async fn delete_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<Json<serde_json::Value>, ApiError> {
  let media_id = MediaId(id);
  // Fetch item first to get thumbnail path for cleanup
  let item = state.storage.get_media(media_id).await?;

  // Record audit BEFORE delete to avoid FK constraint violation
  pinakes_core::audit::record_action(
    &state.storage,
    Some(media_id),
    pinakes_core::model::AuditAction::Deleted,
    None,
  )
  .await?;

  state.storage.delete_media(media_id).await?;

  // Clean up thumbnail file if it exists
  if let Some(ref thumb_path) = item.thumbnail_path
    && let Err(e) = tokio::fs::remove_file(thumb_path).await
    && e.kind() != std::io::ErrorKind::NotFound
  {
    tracing::warn!(path = %thumb_path.display(), error = %e, "failed to remove thumbnail");
  }

  state.emit_plugin_event(
    "MediaDeleted",
    &serde_json::json!({
        "media_id": media_id.to_string(),
        "path": item.path.to_string_lossy(),
    }),
  );

  Ok(Json(serde_json::json!({"deleted": true})))
}

pub async fn open_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<Json<serde_json::Value>, ApiError> {
  let item = state.storage.get_media(MediaId(id)).await?;
  let opener = pinakes_core::opener::default_opener();
  opener.open(&item.path)?;
  pinakes_core::audit::record_action(
    &state.storage,
    Some(item.id),
    pinakes_core::model::AuditAction::Opened,
    None,
  )
  .await?;
  Ok(Json(serde_json::json!({"opened": true})))
}

pub async fn stream_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  headers: axum::http::HeaderMap,
) -> Result<axum::response::Response, ApiError> {
  use axum::{
    body::Body,
    http::{StatusCode, header},
  };
  use tokio::io::{AsyncReadExt, AsyncSeekExt};
  use tokio_util::io::ReaderStream;

  let item = state.storage.get_media(MediaId(id)).await?;

  let file = tokio::fs::File::open(&item.path).await.map_err(|_e| {
    ApiError(pinakes_core::error::PinakesError::FileNotFound(
      item.path.clone(),
    ))
  })?;

  let metadata = file
    .metadata()
    .await
    .map_err(|e| ApiError(pinakes_core::error::PinakesError::Io(e)))?;
  let total_size = metadata.len();
  let content_type = item.media_type.mime_type();

  // Parse Range header
  if let Some(range_header) = headers.get(header::RANGE)
    && let Ok(range_str) = range_header.to_str()
    && let Some(range) = parse_range(range_str, total_size)
  {
    let (start, end) = range;
    let content_length = end - start + 1;

    let mut file = file;
    file
      .seek(std::io::SeekFrom::Start(start))
      .await
      .map_err(|e| ApiError(pinakes_core::error::PinakesError::Io(e)))?;

    let limited = file.take(content_length);
    let stream = ReaderStream::new(limited);
    let body = Body::from_stream(stream);

    return axum::response::Response::builder()
      .status(StatusCode::PARTIAL_CONTENT)
      .header(header::CONTENT_TYPE, content_type)
      .header(header::CONTENT_LENGTH, content_length)
      .header(header::ACCEPT_RANGES, "bytes")
      .header(
        header::CONTENT_RANGE,
        format!("bytes {start}-{end}/{total_size}"),
      )
      .header(
        header::CONTENT_DISPOSITION,
        format!("inline; filename=\"{}\"", item.file_name),
      )
      .body(body)
      .map_err(|e| {
        ApiError(pinakes_core::error::PinakesError::InvalidOperation(
          format!("failed to build response: {e}"),
        ))
      });
  }

  // Full response (no Range header)
  let stream = ReaderStream::new(file);
  let body = Body::from_stream(stream);

  axum::response::Response::builder()
    .header(header::CONTENT_TYPE, content_type)
    .header(header::CONTENT_LENGTH, total_size)
    .header(header::ACCEPT_RANGES, "bytes")
    .header(
      header::CONTENT_DISPOSITION,
      format!("inline; filename=\"{}\"", item.file_name),
    )
    .body(body)
    .map_err(|e| {
      ApiError(pinakes_core::error::PinakesError::InvalidOperation(
        format!("failed to build response: {e}"),
      ))
    })
}

/// Parse a `Range: bytes=START-END` header value.
/// Returns `Some((start, end))` inclusive, or `None` if malformed.
fn parse_range(header: &str, total_size: u64) -> Option<(u64, u64)> {
  let bytes_prefix = header.strip_prefix("bytes=")?;
  let (start_str, end_str) = bytes_prefix.split_once('-')?;

  if start_str.is_empty() {
    // Suffix range: bytes=-500 means last 500 bytes
    let suffix_len: u64 = end_str.parse().ok()?;
    let start = total_size.saturating_sub(suffix_len);
    Some((start, total_size - 1))
  } else {
    let start: u64 = start_str.parse().ok()?;
    let end = if end_str.is_empty() {
      total_size - 1
    } else {
      end_str.parse::<u64>().ok()?.min(total_size - 1)
    };
    if start > end || start >= total_size {
      return None;
    }
    Some((start, end))
  }
}

pub async fn import_with_options(
  State(state): State<AppState>,
  Json(req): Json<ImportWithOptionsRequest>,
) -> Result<Json<ImportResponse>, ApiError> {
  let result = pinakes_core::import::import_file(
    &state.storage,
    &req.path,
    state.plugin_pipeline.as_ref(),
  )
  .await?;

  if !result.was_duplicate {
    apply_import_post_processing(
      &state.storage,
      result.media_id,
      req.tag_ids.as_deref(),
      req.new_tags.as_deref(),
      req.collection_id,
    )
    .await;
  }

  Ok(Json(ImportResponse {
    media_id:      result.media_id.0.to_string(),
    was_duplicate: result.was_duplicate,
  }))
}

pub async fn batch_import(
  State(state): State<AppState>,
  Json(req): Json<BatchImportRequest>,
) -> Result<Json<BatchImportResponse>, ApiError> {
  if req.paths.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let mut results = Vec::new();
  let mut imported = 0usize;
  let mut duplicates = 0usize;
  let mut errors = 0usize;

  for path in &req.paths {
    match pinakes_core::import::import_file(
      &state.storage,
      path,
      state.plugin_pipeline.as_ref(),
    )
    .await
    {
      Ok(result) => {
        if result.was_duplicate {
          duplicates += 1;
        } else {
          imported += 1;
          apply_import_post_processing(
            &state.storage,
            result.media_id,
            req.tag_ids.as_deref(),
            req.new_tags.as_deref(),
            req.collection_id,
          )
          .await;
        }
        results.push(BatchImportItemResult {
          path:          path.to_string_lossy().to_string(),
          media_id:      Some(result.media_id.0.to_string()),
          was_duplicate: result.was_duplicate,
          error:         None,
        });
      },
      Err(e) => {
        errors += 1;
        results.push(BatchImportItemResult {
          path:          path.to_string_lossy().to_string(),
          media_id:      None,
          was_duplicate: false,
          error:         Some(e.to_string()),
        });
      },
    }
  }

  let total = results.len();
  Ok(Json(BatchImportResponse {
    results,
    total,
    imported,
    duplicates,
    errors,
  }))
}

pub async fn import_directory_endpoint(
  State(state): State<AppState>,
  Json(req): Json<DirectoryImportRequest>,
) -> Result<Json<BatchImportResponse>, ApiError> {
  let config = state.config.read().await;
  let ignore_patterns = config.scanning.ignore_patterns.clone();
  let concurrency = config.scanning.import_concurrency;
  drop(config);

  let import_results = pinakes_core::import::import_directory_with_concurrency(
    &state.storage,
    &req.path,
    &ignore_patterns,
    concurrency,
    state.plugin_pipeline.as_ref(),
  )
  .await?;

  let mut results = Vec::new();
  let mut imported = 0usize;
  let mut duplicates = 0usize;
  let mut errors = 0usize;

  for r in import_results {
    match r {
      Ok(result) => {
        if result.was_duplicate {
          duplicates += 1;
        } else {
          imported += 1;
          apply_import_post_processing(
            &state.storage,
            result.media_id,
            req.tag_ids.as_deref(),
            req.new_tags.as_deref(),
            req.collection_id,
          )
          .await;
        }
        results.push(BatchImportItemResult {
          path:          result.path.to_string_lossy().to_string(),
          media_id:      Some(result.media_id.0.to_string()),
          was_duplicate: result.was_duplicate,
          error:         None,
        });
      },
      Err(e) => {
        errors += 1;
        results.push(BatchImportItemResult {
          path:          String::new(),
          media_id:      None,
          was_duplicate: false,
          error:         Some(e.to_string()),
        });
      },
    }
  }

  let total = results.len();
  Ok(Json(BatchImportResponse {
    results,
    total,
    imported,
    duplicates,
    errors,
  }))
}

pub async fn preview_directory(
  State(state): State<AppState>,
  Json(req): Json<serde_json::Value>,
) -> Result<Json<DirectoryPreviewResponse>, ApiError> {
  let path_str = req.get("path").and_then(|v| v.as_str()).ok_or_else(|| {
    pinakes_core::error::PinakesError::InvalidOperation("path required".into())
  })?;
  let recursive = req
    .get("recursive")
    .and_then(serde_json::Value::as_bool)
    .unwrap_or(true);
  let dir = std::path::PathBuf::from(path_str);
  if !dir.is_dir() {
    return Err(pinakes_core::error::PinakesError::FileNotFound(dir).into());
  }

  // Validate the directory is under a configured root (if roots are configured)
  let roots = state.storage.list_root_dirs().await?;
  if !roots.is_empty() {
    let canonical = dir.canonicalize().map_err(|_| {
      pinakes_core::error::PinakesError::InvalidOperation(
        "cannot resolve path".into(),
      )
    })?;
    let allowed = roots.iter().any(|root| canonical.starts_with(root));
    if !allowed {
      return Err(
        pinakes_core::error::PinakesError::InvalidOperation(
          "path is not under a configured root directory".into(),
        )
        .into(),
      );
    }
  }

  let roots_for_walk = roots.clone();
  let files: Vec<DirectoryPreviewFile> =
    tokio::task::spawn_blocking(move || {
      let mut result = Vec::new();
      fn walk_dir(
        dir: &std::path::Path,
        recursive: bool,
        roots: &[std::path::PathBuf],
        result: &mut Vec<DirectoryPreviewFile>,
      ) {
        let Ok(entries) = std::fs::read_dir(dir) else {
          return;
        };
        for entry in entries.flatten() {
          let path = entry.path();
          // Skip hidden files/dirs
          if path
            .file_name()
            .is_some_and(|n| n.to_string_lossy().starts_with('.'))
          {
            continue;
          }
          if path.is_dir() {
            if recursive {
              walk_dir(&path, recursive, roots, result);
            }
          } else if path.is_file()
            && let Some(mt) =
              pinakes_core::media_type::MediaType::from_path(&path)
          {
            let size = entry.metadata().ok().map_or(0, |m| m.len());
            let file_name = path
              .file_name()
              .map(|n| n.to_string_lossy().to_string())
              .unwrap_or_default();
            let media_type = serde_json::to_value(mt)
              .ok()
              .and_then(|v| v.as_str().map(String::from))
              .unwrap_or_default();
            result.push(DirectoryPreviewFile {
              path: crate::dto::relativize_path(&path, roots),
              file_name,
              media_type,
              file_size: size,
            });
          }
        }
      }
      walk_dir(&dir, recursive, &roots_for_walk, &mut result);
      result
    })
    .await
    .map_err(|e| {
      pinakes_core::error::PinakesError::Io(std::io::Error::other(e))
    })?;

  let total_count = files.len();
  let total_size = files.iter().map(|f| f.file_size).sum();

  Ok(Json(DirectoryPreviewResponse {
    files,
    total_count,
    total_size,
  }))
}

pub async fn set_custom_field(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  Json(req): Json<SetCustomFieldRequest>,
) -> Result<Json<serde_json::Value>, ApiError> {
  if req.name.is_empty() || req.name.len() > 255 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "field name must be 1-255 characters".into(),
      ),
    ));
  }
  if req.value.len() > MAX_LONG_TEXT {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(format!(
        "field value exceeds {MAX_LONG_TEXT} characters"
      )),
    ));
  }
  use pinakes_core::model::{CustomField, CustomFieldType};
  let field_type = match req.field_type.as_str() {
    "number" => CustomFieldType::Number,
    "date" => CustomFieldType::Date,
    "boolean" => CustomFieldType::Boolean,
    _ => CustomFieldType::Text,
  };
  let field = CustomField {
    field_type,
    value: req.value,
  };
  state
    .storage
    .set_custom_field(MediaId(id), &req.name, &field)
    .await?;
  Ok(Json(serde_json::json!({"set": true})))
}

pub async fn delete_custom_field(
  State(state): State<AppState>,
  Path((id, name)): Path<(Uuid, String)>,
) -> Result<Json<serde_json::Value>, ApiError> {
  state
    .storage
    .delete_custom_field(MediaId(id), &name)
    .await?;
  Ok(Json(serde_json::json!({"deleted": true})))
}

pub async fn batch_tag(
  State(state): State<AppState>,
  Json(req): Json<BatchTagRequest>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  if req.media_ids.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let media_ids: Vec<MediaId> =
    req.media_ids.iter().map(|id| MediaId(*id)).collect();
  match state
    .storage
    .batch_tag_media(&media_ids, &req.tag_ids)
    .await
  {
    Ok(count) => {
      Ok(Json(BatchOperationResponse {
        processed: count as usize,
        errors:    Vec::new(),
      }))
    },
    Err(e) => {
      Ok(Json(BatchOperationResponse {
        processed: 0,
        errors:    vec![e.to_string()],
      }))
    },
  }
}

pub async fn delete_all_media(
  State(state): State<AppState>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  // Record audit entry before deletion
  if let Err(e) = pinakes_core::audit::record_action(
    &state.storage,
    None,
    pinakes_core::model::AuditAction::Deleted,
    Some("delete all media".to_string()),
  )
  .await
  {
    tracing::warn!(error = %e, "failed to record audit entry");
  }

  match state.storage.delete_all_media().await {
    Ok(count) => {
      Ok(Json(BatchOperationResponse {
        processed: count as usize,
        errors:    Vec::new(),
      }))
    },
    Err(e) => {
      Ok(Json(BatchOperationResponse {
        processed: 0,
        errors:    vec![e.to_string()],
      }))
    },
  }
}

pub async fn batch_delete(
  State(state): State<AppState>,
  Json(req): Json<BatchDeleteRequest>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  if req.media_ids.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let media_ids: Vec<MediaId> =
    req.media_ids.iter().map(|id| MediaId(*id)).collect();

  // Record audit entries BEFORE delete to avoid FK constraint violation.
  // Use None for media_id since they'll be deleted; include ID in details.
  for id in &media_ids {
    if let Err(e) = pinakes_core::audit::record_action(
      &state.storage,
      None,
      pinakes_core::model::AuditAction::Deleted,
      Some(format!("batch delete: media_id={}", id.0)),
    )
    .await
    {
      tracing::warn!(error = %e, "failed to record audit entry");
    }
  }

  match state.storage.batch_delete_media(&media_ids).await {
    Ok(count) => {
      Ok(Json(BatchOperationResponse {
        processed: count as usize,
        errors:    Vec::new(),
      }))
    },
    Err(e) => {
      Ok(Json(BatchOperationResponse {
        processed: 0,
        errors:    vec![e.to_string()],
      }))
    },
  }
}

pub async fn batch_add_to_collection(
  State(state): State<AppState>,
  Json(req): Json<BatchCollectionRequest>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  if req.media_ids.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let mut processed = 0;
  let mut errors = Vec::new();
  for (i, media_id) in req.media_ids.iter().enumerate() {
    match pinakes_core::collections::add_member(
      &state.storage,
      req.collection_id,
      MediaId(*media_id),
      i as i32,
    )
    .await
    {
      Ok(()) => processed += 1,
      Err(e) => errors.push(format!("{media_id}: {e}")),
    }
  }
  Ok(Json(BatchOperationResponse { processed, errors }))
}

pub async fn batch_update(
  State(state): State<AppState>,
  Json(req): Json<BatchUpdateRequest>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  if req.media_ids.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let media_ids: Vec<MediaId> =
    req.media_ids.iter().map(|id| MediaId(*id)).collect();
  match state
    .storage
    .batch_update_media(
      &media_ids,
      req.title.as_deref(),
      req.artist.as_deref(),
      req.album.as_deref(),
      req.genre.as_deref(),
      req.year,
      req.description.as_deref(),
    )
    .await
  {
    Ok(count) => {
      Ok(Json(BatchOperationResponse {
        processed: count as usize,
        errors:    Vec::new(),
      }))
    },
    Err(e) => {
      Ok(Json(BatchOperationResponse {
        processed: 0,
        errors:    vec![e.to_string()],
      }))
    },
  }
}

pub async fn get_thumbnail(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<axum::response::Response, ApiError> {
  use axum::{body::Body, http::header};
  use tokio_util::io::ReaderStream;

  let item = state.storage.get_media(MediaId(id)).await?;

  let thumb_path = item.thumbnail_path.ok_or_else(|| {
    ApiError(pinakes_core::error::PinakesError::NotFound(
      "no thumbnail available".into(),
    ))
  })?;

  let file = tokio::fs::File::open(&thumb_path).await.map_err(|_e| {
    ApiError(pinakes_core::error::PinakesError::FileNotFound(thumb_path))
  })?;

  let stream = ReaderStream::new(file);
  let body = Body::from_stream(stream);

  axum::response::Response::builder()
    .header(header::CONTENT_TYPE, "image/jpeg")
    .header(header::CACHE_CONTROL, "public, max-age=86400")
    .body(body)
    .map_err(|e| {
      ApiError(pinakes_core::error::PinakesError::InvalidOperation(
        format!("failed to build response: {e}"),
      ))
    })
}

pub async fn get_media_count(
  State(state): State<AppState>,
) -> Result<Json<MediaCountResponse>, ApiError> {
  let count = state.storage.count_media().await?;
  Ok(Json(MediaCountResponse { count }))
}

pub async fn rename_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  Json(req): Json<RenameMediaRequest>,
) -> Result<Json<MediaResponse>, ApiError> {
  let media_id = MediaId(id);

  // Perform the rename
  let old_path = state.storage.rename_media(media_id, &req.new_name).await?;

  // Record in sync log
  let item = state.storage.get_media(media_id).await?;
  let change = pinakes_core::sync::SyncLogEntry {
    id:                uuid::Uuid::now_v7(),
    sequence:          0,
    change_type:       pinakes_core::sync::SyncChangeType::Moved,
    media_id:          Some(media_id),
    path:              item.path.to_string_lossy().to_string(),
    content_hash:      Some(item.content_hash.clone()),
    file_size:         Some(item.file_size),
    metadata_json:     Some(
      serde_json::json!({ "old_path": old_path }).to_string(),
    ),
    changed_by_device: None,
    timestamp:         chrono::Utc::now(),
  };
  if let Err(e) = state.storage.record_sync_change(&change).await {
    tracing::warn!(error = %e, "failed to record sync change");
  }

  // Record audit
  pinakes_core::audit::record_action(
    &state.storage,
    Some(media_id),
    pinakes_core::model::AuditAction::Updated,
    Some(format!("renamed from {} to {}", old_path, req.new_name)),
  )
  .await?;

  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(MediaResponse::new(item, &roots)))
}

pub async fn move_media_endpoint(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  Json(req): Json<MoveMediaRequest>,
) -> Result<Json<MediaResponse>, ApiError> {
  let media_id = MediaId(id);

  // Perform the move
  let old_path = state.storage.move_media(media_id, &req.destination).await?;

  // Record in sync log
  let item = state.storage.get_media(media_id).await?;
  let change = pinakes_core::sync::SyncLogEntry {
    id:                uuid::Uuid::now_v7(),
    sequence:          0,
    change_type:       pinakes_core::sync::SyncChangeType::Moved,
    media_id:          Some(media_id),
    path:              item.path.to_string_lossy().to_string(),
    content_hash:      Some(item.content_hash.clone()),
    file_size:         Some(item.file_size),
    metadata_json:     Some(
      serde_json::json!({ "old_path": old_path }).to_string(),
    ),
    changed_by_device: None,
    timestamp:         chrono::Utc::now(),
  };
  if let Err(e) = state.storage.record_sync_change(&change).await {
    tracing::warn!(error = %e, "failed to record sync change");
  }

  // Record audit
  pinakes_core::audit::record_action(
    &state.storage,
    Some(media_id),
    pinakes_core::model::AuditAction::Updated,
    Some(format!(
      "moved from {} to {}",
      old_path,
      req.destination.display()
    )),
  )
  .await?;

  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(MediaResponse::new(item, &roots)))
}

pub async fn batch_move_media(
  State(state): State<AppState>,
  Json(req): Json<BatchMoveRequest>,
) -> Result<Json<BatchOperationResponse>, ApiError> {
  if req.media_ids.len() > 10_000 {
    return Err(ApiError(
      pinakes_core::error::PinakesError::InvalidOperation(
        "batch size exceeds limit of 10000".into(),
      ),
    ));
  }

  let media_ids: Vec<MediaId> =
    req.media_ids.iter().map(|id| MediaId(*id)).collect();

  match state
    .storage
    .batch_move_media(&media_ids, &req.destination)
    .await
  {
    Ok(results) => {
      // Record sync changes for each moved item
      for (media_id, old_path) in &results {
        if let Ok(item) = state.storage.get_media(*media_id).await {
          let change = pinakes_core::sync::SyncLogEntry {
            id:                uuid::Uuid::now_v7(),
            sequence:          0,
            change_type:       pinakes_core::sync::SyncChangeType::Moved,
            media_id:          Some(*media_id),
            path:              item.path.to_string_lossy().to_string(),
            content_hash:      Some(item.content_hash.clone()),
            file_size:         Some(item.file_size),
            metadata_json:     Some(
              serde_json::json!({ "old_path": old_path }).to_string(),
            ),
            changed_by_device: None,
            timestamp:         chrono::Utc::now(),
          };
          if let Err(e) = state.storage.record_sync_change(&change).await {
            tracing::warn!(error = %e, "failed to record sync change");
          }
        }
      }

      Ok(Json(BatchOperationResponse {
        processed: results.len(),
        errors:    Vec::new(),
      }))
    },
    Err(e) => {
      Ok(Json(BatchOperationResponse {
        processed: 0,
        errors:    vec![e.to_string()],
      }))
    },
  }
}

pub async fn soft_delete_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<Json<serde_json::Value>, ApiError> {
  let media_id = MediaId(id);

  // Get item info before soft delete
  let item = state.storage.get_media(media_id).await?;

  // Perform soft delete
  state.storage.soft_delete_media(media_id).await?;

  // Record in sync log
  let change = pinakes_core::sync::SyncLogEntry {
    id:                uuid::Uuid::now_v7(),
    sequence:          0,
    change_type:       pinakes_core::sync::SyncChangeType::Deleted,
    media_id:          Some(media_id),
    path:              item.path.to_string_lossy().to_string(),
    content_hash:      Some(item.content_hash.clone()),
    file_size:         Some(item.file_size),
    metadata_json:     None,
    changed_by_device: None,
    timestamp:         chrono::Utc::now(),
  };
  if let Err(e) = state.storage.record_sync_change(&change).await {
    tracing::warn!(error = %e, "failed to record sync change");
  }

  // Record audit
  pinakes_core::audit::record_action(
    &state.storage,
    Some(media_id),
    pinakes_core::model::AuditAction::Deleted,
    Some("moved to trash".to_string()),
  )
  .await?;

  state.emit_plugin_event(
    "MediaDeleted",
    &serde_json::json!({"media_id": media_id.to_string(), "trashed": true}),
  );

  Ok(Json(serde_json::json!({"deleted": true, "trashed": true})))
}

pub async fn restore_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
) -> Result<Json<MediaResponse>, ApiError> {
  let media_id = MediaId(id);

  // Perform restore
  state.storage.restore_media(media_id).await?;

  // Get updated item
  let item = state.storage.get_media(media_id).await?;

  // Record in sync log
  let change = pinakes_core::sync::SyncLogEntry {
    id:                uuid::Uuid::now_v7(),
    sequence:          0,
    change_type:       pinakes_core::sync::SyncChangeType::Created,
    media_id:          Some(media_id),
    path:              item.path.to_string_lossy().to_string(),
    content_hash:      Some(item.content_hash.clone()),
    file_size:         Some(item.file_size),
    metadata_json:     None,
    changed_by_device: None,
    timestamp:         chrono::Utc::now(),
  };
  if let Err(e) = state.storage.record_sync_change(&change).await {
    tracing::warn!(error = %e, "failed to record sync change");
  }

  // Record audit
  pinakes_core::audit::record_action(
    &state.storage,
    Some(media_id),
    pinakes_core::model::AuditAction::Updated,
    Some("restored from trash".to_string()),
  )
  .await?;

  state.emit_plugin_event(
    "MediaUpdated",
    &serde_json::json!({"media_id": media_id.to_string(), "restored": true}),
  );

  let roots = state.config.read().await.directories.roots.clone();
  Ok(Json(MediaResponse::new(item, &roots)))
}

pub async fn list_trash(
  State(state): State<AppState>,
  Query(params): Query<PaginationParams>,
) -> Result<Json<TrashResponse>, ApiError> {
  let pagination = Pagination::new(
    params.offset.unwrap_or(0),
    params.limit.unwrap_or(50).min(1000),
    params.sort,
  );

  let items = state.storage.list_trash(&pagination).await?;
  let count = state.storage.count_trash().await?;
  let roots = state.config.read().await.directories.roots.clone();

  Ok(Json(TrashResponse {
    items:       items
      .into_iter()
      .map(|item| MediaResponse::new(item, &roots))
      .collect(),
    total_count: count,
  }))
}

pub async fn trash_info(
  State(state): State<AppState>,
) -> Result<Json<TrashInfoResponse>, ApiError> {
  let count = state.storage.count_trash().await?;
  Ok(Json(TrashInfoResponse { count }))
}

pub async fn empty_trash(
  State(state): State<AppState>,
) -> Result<Json<EmptyTrashResponse>, ApiError> {
  // Record audit before emptying
  pinakes_core::audit::record_action(
    &state.storage,
    None,
    pinakes_core::model::AuditAction::Deleted,
    Some("emptied trash".to_string()),
  )
  .await?;

  let deleted_count = state.storage.empty_trash().await?;

  Ok(Json(EmptyTrashResponse { deleted_count }))
}

pub async fn permanent_delete_media(
  State(state): State<AppState>,
  Path(id): Path<Uuid>,
  Query(params): Query<std::collections::HashMap<String, String>>,
) -> Result<Json<serde_json::Value>, ApiError> {
  let media_id = MediaId(id);
  let permanent = params.get("permanent").is_some_and(|v| v == "true");

  if permanent {
    // Get item info before delete
    let item = state.storage.get_media(media_id).await?;

    // Record audit BEFORE delete
    pinakes_core::audit::record_action(
      &state.storage,
      Some(media_id),
      pinakes_core::model::AuditAction::Deleted,
      Some("permanently deleted".to_string()),
    )
    .await?;

    // Perform hard delete
    state.storage.delete_media(media_id).await?;

    // Record in sync log
    let change = pinakes_core::sync::SyncLogEntry {
      id:                uuid::Uuid::now_v7(),
      sequence:          0,
      change_type:       pinakes_core::sync::SyncChangeType::Deleted,
      media_id:          Some(media_id),
      path:              item.path.to_string_lossy().to_string(),
      content_hash:      Some(item.content_hash.clone()),
      file_size:         Some(item.file_size),
      metadata_json:     Some(
        serde_json::json!({"permanent": true}).to_string(),
      ),
      changed_by_device: None,
      timestamp:         chrono::Utc::now(),
    };
    if let Err(e) = state.storage.record_sync_change(&change).await {
      tracing::warn!(error = %e, "failed to record sync change");
    }

    // Clean up thumbnail
    if let Some(ref thumb_path) = item.thumbnail_path
      && let Err(e) = tokio::fs::remove_file(thumb_path).await
      && e.kind() != std::io::ErrorKind::NotFound
    {
      tracing::warn!(path = %thumb_path.display(), error = %e, "failed to remove thumbnail");
    }

    if let Some(ref dispatcher) = state.webhook_dispatcher {
      dispatcher.dispatch(pinakes_core::webhooks::WebhookEvent::MediaDeleted {
        media_id: id.to_string(),
      });
    }

    Ok(Json(
      serde_json::json!({"deleted": true, "permanent": true}),
    ))
  } else {
    // Soft delete (move to trash)
    soft_delete_media(State(state), Path(id)).await
  }
}