use shanty_db::Database;
use shanty_search::cache;
use shanty_search::error::SearchResult;
use shanty_search::provider::*;

/// Mock search provider for testing.
struct MockSearch;

impl SearchProvider for MockSearch {
    async fn search_artist(&self, query: &str, _limit: u32) -> SearchResult<Vec<ArtistResult>> {
        if query.contains("Pink Floyd") {
            Ok(vec![ArtistResult {
                id: "83d91898-7763-47d7-b03b-b92132375c47".into(),
                name: "Pink Floyd".into(),
                disambiguation: Some("English rock band".into()),
                country: Some("GB".into()),
                artist_type: Some("Group".into()),
                score: 100,
            }])
        } else {
            Ok(vec![])
        }
    }

    async fn search_album(
        &self,
        query: &str,
        _artist_hint: Option<&str>,
        _limit: u32,
    ) -> SearchResult<Vec<AlbumResult>> {
        if query.contains("Dark Side") {
            Ok(vec![AlbumResult {
                id: "release-123".into(),
                title: "The Dark Side of the Moon".into(),
                artist: "Pink Floyd".into(),
                artist_id: Some("83d91898".into()),
                year: Some("1973".into()),
                track_count: Some(10),
                score: 100,
            }])
        } else {
            Ok(vec![])
        }
    }

    async fn search_track(
        &self,
        query: &str,
        _artist_hint: Option<&str>,
        _limit: u32,
    ) -> SearchResult<Vec<TrackResult>> {
        if query.contains("Time") {
            Ok(vec![TrackResult {
                id: "rec-456".into(),
                title: "Time".into(),
                artist: "Pink Floyd".into(),
                artist_id: Some("83d91898".into()),
                album: Some("The Dark Side of the Moon".into()),
                duration_ms: Some(413_000),
                score: 100,
            }])
        } else {
            Ok(vec![])
        }
    }

    async fn get_discography(&self, _artist_id: &str) -> SearchResult<Discography> {
        Ok(Discography {
            artist_name: "Pink Floyd".into(),
            artist_id: "83d91898".into(),
            releases: vec![
                DiscographyEntry {
                    id: "r1".into(),
                    title: "The Dark Side of the Moon".into(),
                    date: Some("1973-03-01".into()),
                    release_type: Some("Album".into()),
                    track_count: Some(10),
                },
                DiscographyEntry {
                    id: "r2".into(),
                    title: "Wish You Were Here".into(),
                    date: Some("1975-09-12".into()),
                    release_type: Some("Album".into()),
                    track_count: Some(5),
                },
            ],
        })
    }

    async fn get_release_groups(&self, _artist_id: &str) -> SearchResult<Vec<shanty_search::ReleaseGroupResult>> {
        Ok(vec![])
    }
}

#[tokio::test]
async fn test_search_artist() {
    let provider = MockSearch;
    let results = provider.search_artist("Pink Floyd", 10).await.unwrap();
    assert_eq!(results.len(), 1);
    assert_eq!(results[0].name, "Pink Floyd");
    assert_eq!(results[0].country.as_deref(), Some("GB"));
}

#[tokio::test]
async fn test_search_artist_no_results() {
    let provider = MockSearch;
    let results = provider.search_artist("Nonexistent Band", 10).await.unwrap();
    assert!(results.is_empty());
}

#[tokio::test]
async fn test_search_album() {
    let provider = MockSearch;
    let results = provider.search_album("Dark Side", Some("Pink Floyd"), 10).await.unwrap();
    assert_eq!(results.len(), 1);
    assert_eq!(results[0].title, "The Dark Side of the Moon");
}

#[tokio::test]
async fn test_search_track() {
    let provider = MockSearch;
    let results = provider.search_track("Time", Some("Pink Floyd"), 10).await.unwrap();
    assert_eq!(results.len(), 1);
    assert_eq!(results[0].title, "Time");
    assert_eq!(results[0].album.as_deref(), Some("The Dark Side of the Moon"));
}

#[tokio::test]
async fn test_discography() {
    let provider = MockSearch;
    let disco = provider.get_discography("83d91898").await.unwrap();
    assert_eq!(disco.artist_name, "Pink Floyd");
    assert_eq!(disco.releases.len(), 2);
}

#[tokio::test]
async fn test_result_serialization() {
    let result = ArtistResult {
        id: "test-id".into(),
        name: "Test Artist".into(),
        disambiguation: None,
        country: Some("US".into()),
        artist_type: Some("Person".into()),
        score: 95,
    };
    let json = serde_json::to_string(&result).unwrap();
    let back: ArtistResult = serde_json::from_str(&json).unwrap();
    assert_eq!(back.name, "Test Artist");
    assert_eq!(back.score, 95);
}

#[tokio::test]
async fn test_cache_roundtrip() {
    let db = Database::new("sqlite::memory:").await.unwrap();
    let results = vec![ArtistResult {
        id: "123".into(),
        name: "Cached Artist".into(),
        disambiguation: None,
        country: None,
        artist_type: None,
        score: 90,
    }];

    // Cache miss
    let cached: Option<Vec<ArtistResult>> =
        cache::get_cached(Some(db.conn()), "test:artist:query").await.unwrap();
    assert!(cached.is_none());

    // Store
    cache::set_cached(Some(db.conn()), "test:artist:query", "musicbrainz", &results)
        .await
        .unwrap();

    // Cache hit
    let cached: Option<Vec<ArtistResult>> =
        cache::get_cached(Some(db.conn()), "test:artist:query").await.unwrap();
    assert!(cached.is_some());
    assert_eq!(cached.unwrap()[0].name, "Cached Artist");
}

#[tokio::test]
async fn test_cache_none_conn() {
    // With no DB connection, caching is a no-op
    let cached: Option<Vec<ArtistResult>> =
        cache::get_cached(None, "anything").await.unwrap();
    assert!(cached.is_none());

    // set_cached with None conn should not error
    cache::set_cached::<Vec<ArtistResult>>(None, "key", "provider", &vec![])
        .await
        .unwrap();
}