//! Integration tests for the plugin pipeline with real WASM execution.
//!
//! These tests use the test-plugin fixture at
//! `tests/fixtures/test-plugin/` which is a compiled WASM binary
//! exercising all extension points.

// FIXME: add a Justfile and make sure the fixture is compiled for tests...

#![allow(clippy::print_stderr, reason = "Fine for tests")]
use std::{path::Path, sync::Arc};

use pinakes_core::{
  config::PluginTimeoutConfig,
  plugin::{PluginManager, PluginManagerConfig, PluginPipeline},
};
use tempfile::TempDir;

/// Path to the compiled test plugin fixture.
fn fixture_dir() -> std::path::PathBuf {
  Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures/test-plugin")
}

/// Check the WASM binary exists (skip tests if not built).
fn wasm_binary_exists() -> bool {
  fixture_dir().join("test_plugin.wasm").exists()
}

/// Set up a `PluginManager` pointing at the fixture directory as a
/// `plugin_dir`. The loader expects `plugin_dirs/test-plugin/plugin.toml`.
/// So we point at the fixtures directory (parent of test-plugin/).
fn setup_manager(temp: &TempDir) -> PluginManager {
  let fixtures_dir =
    Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures");

  let config = PluginManagerConfig {
    plugin_dirs: vec![fixtures_dir],
    allow_unsigned: true,
    max_concurrent_ops: 2,
    plugin_timeout_secs: 30,
    timeouts: PluginTimeoutConfig::default(),
    max_consecutive_failures: 5,
    ..Default::default()
  };

  PluginManager::new(
    temp.path().join("data"),
    temp.path().join("cache"),
    config,
  )
  .expect("create plugin manager")
}

#[tokio::test]
async fn test_plugin_discovery_loads_fixture() {
  if !wasm_binary_exists() {
    eprintln!("WASM binary not found, skipping test");
    return;
  }

  let temp = TempDir::new().unwrap();
  let manager = setup_manager(&temp);

  let loaded = manager.discover_and_load_all().await.unwrap();
  assert!(
    !loaded.is_empty(),
    "should discover at least the test-plugin"
  );
  assert!(
    loaded.contains(&"test-plugin".to_string()),
    "should load test-plugin, got: {loaded:?}"
  );
}

#[tokio::test]
async fn test_plugin_capability_discovery() {
  if !wasm_binary_exists() {
    return;
  }

  let temp = TempDir::new().unwrap();
  let manager = Arc::new(setup_manager(&temp));
  manager.discover_and_load_all().await.unwrap();

  let pipeline = Arc::new(PluginPipeline::new(
    manager,
    PluginTimeoutConfig::default(),
    5,
  ));

  pipeline.discover_capabilities().await.unwrap();

  // The test plugin registers a custom .testfile media type, so
  // resolve_media_type should recognise it (even if no physical file exists,
  // can_handle checks the extension).
  let resolved = pipeline
    .resolve_media_type(Path::new("/tmp/example.testfile"))
    .await;
  assert!(
    resolved.is_some(),
    "pipeline should resolve .testfile via test-plugin"
  );
}

#[tokio::test]
async fn test_pipeline_builtin_fallback_still_works() {
  if !wasm_binary_exists() {
    return;
  }

  let temp = TempDir::new().unwrap();
  let manager = Arc::new(setup_manager(&temp));
  manager.discover_and_load_all().await.unwrap();

  let pipeline = Arc::new(PluginPipeline::new(
    manager,
    PluginTimeoutConfig::default(),
    5,
  ));
  pipeline.discover_capabilities().await.unwrap();

  // Built-in types should still resolve (test-plugin at priority 50 runs
  // first but won't claim .mp3).
  let mp3 = pipeline
    .resolve_media_type(Path::new("/tmp/song.mp3"))
    .await;
  assert!(mp3.is_some(), "built-in .mp3 resolution should still work");

  // Unknown types should still resolve to None
  let unknown = pipeline
    .resolve_media_type(Path::new("/tmp/data.xyz999"))
    .await;
  assert!(
    unknown.is_none(),
    "unknown extension should resolve to None"
  );
}

#[tokio::test]
async fn test_emit_event_with_loaded_plugin() {
  if !wasm_binary_exists() {
    return;
  }

  let temp = TempDir::new().unwrap();
  let manager = Arc::new(setup_manager(&temp));
  manager.discover_and_load_all().await.unwrap();

  let pipeline = Arc::new(PluginPipeline::new(
    manager,
    PluginTimeoutConfig::default(),
    5,
  ));
  pipeline.discover_capabilities().await.unwrap();

  // Emit an event the test-plugin is interested in (MediaImported).
  // Should not panic; the handler runs in a spawned task.
  pipeline.emit_event(
    "MediaImported",
    &serde_json::json!({"media_id": "test-123", "path": "/tmp/test.mp3"}),
  );

  // Give the spawned task a moment to run
  tokio::time::sleep(std::time::Duration::from_millis(200)).await;
}

#[tokio::test]
async fn test_event_not_interested_is_ignored() {
  if !wasm_binary_exists() {
    return;
  }

  let temp = TempDir::new().unwrap();
  let manager = Arc::new(setup_manager(&temp));
  manager.discover_and_load_all().await.unwrap();

  let pipeline = Arc::new(PluginPipeline::new(
    manager,
    PluginTimeoutConfig::default(),
    5,
  ));
  pipeline.discover_capabilities().await.unwrap();

  // Emit an event the test-plugin is NOT interested in.
  // Should complete silently.
  pipeline.emit_event("ScanStarted", &serde_json::json!({"roots": ["/tmp"]}));

  tokio::time::sleep(std::time::Duration::from_millis(100)).await;
}