//! Incremental acceptance uses genuine Google vectors, never stand-in embeddings.
use anyhow::Result;
use rusqlite::Connection;
use searchi_core::SearchIndex;
use searchi_semantic::{GemmaEmbedder, TextWindow};
use searchi_service::{EmbeddingProvider, HybridSearch, SearchOptions};
use std::{
    fs,
    path::Path,
    sync::{Arc, Mutex},
};

#[derive(Default, Debug, Clone, PartialEq, Eq)]
struct Calls {
    documents: usize,
    images: usize,
    audio: usize,
}
struct CountedGoogle {
    inner: GemmaEmbedder,
    calls: Arc<Mutex<Calls>>,
}
impl EmbeddingProvider for CountedGoogle {
    fn fingerprint(&self) -> &str {
        EmbeddingProvider::fingerprint(&self.inner)
    }
    fn dimensions(&self) -> usize {
        EmbeddingProvider::dimensions(&self.inner)
    }
    fn split_windows(&mut self, text: &str, title: &str) -> Result<Vec<TextWindow>> {
        self.inner.split_windows(text, title)
    }
    fn embed_documents(&mut self, texts: &[&str], title: &str) -> Result<Vec<Vec<f32>>> {
        self.calls.lock().unwrap().documents += texts.len();
        self.inner.embed_documents(texts, title)
    }
    fn embed_query(&mut self, text: &str) -> Result<Vec<f32>> {
        self.inner.embed_query(text)
    }
    fn embed_code_query(&mut self, text: &str) -> Result<Vec<f32>> {
        self.inner.embed_code_query(text)
    }
    fn embed_images(&mut self, paths: &[&Path], budget: u32) -> Result<Vec<Vec<f32>>> {
        self.calls.lock().unwrap().images += paths.len();
        self.inner.embed_images_with_budget(paths, budget)
    }
    fn embed_audio(&mut self, pcm: &[f32]) -> Result<Vec<f32>> {
        self.calls.lock().unwrap().audio += 1;
        self.inner.embed_audio_pcm(pcm)
    }
    fn worker_info(&self) -> Option<searchi_semantic::WorkerInfo> {
        Some(self.inner.info.clone())
    }
}
fn google(db: &Path) -> Result<(HybridSearch, Arc<Mutex<Calls>>)> {
    assert_eq!(std::env::var("SEARCHI_FORCE_CPU")?, "1");
    let model = std::env::var_os("SEARCHI_GEMMA_MODEL_DIR")
        .expect("Verified Google model directory required");
    let worker =
        std::env::var_os("SEARCHI_GEMMA_WORKER").expect("Normal auto runtime worker required");
    let inner = GemmaEmbedder::load(model, worker, 1)?;
    assert_eq!(inner.info.device, "cpu");
    let calls = Arc::new(Mutex::new(Calls::default()));
    let service = HybridSearch::with_provider(
        db,
        Box::new(CountedGoogle {
            inner,
            calls: calls.clone(),
        }),
    )?;
    Ok((service, calls))
}
type Chunk = (String, String, i64, i64, i64, String, Vec<u8>);
fn chunks(db: &Path) -> Result<Vec<Chunk>> {
    let connection = Connection::open(db)?;
    let mut query = connection.prepare("SELECT path,kind,number,start_byte,end_byte,snippet,vector FROM semantic_chunks WHERE generation=(SELECT active_generation FROM semantic_meta WHERE singleton=1) ORDER BY path,ordinal")?;
    let rows = query.query_map([], |r| {
        Ok((
            r.get(0)?,
            r.get(1)?,
            r.get(2)?,
            r.get(3)?,
            r.get(4)?,
            r.get(5)?,
            r.get(6)?,
        ))
    })?;
    Ok(rows.collect::<rusqlite::Result<Vec<_>>>()?)
}

#[test]
#[ignore = "Requires verified Google assets and the normal native worker; CPU only"]
fn genuine_google_reuses_text_code_and_remaps_moves_but_reencodes_titles() -> Result<()> {
    let temp = tempfile::tempdir()?;
    let root = temp.path().join("sources");
    fs::create_dir(&root)?;
    let document = root.join("agreement.txt");
    fs::write(
        &document,
        "The supplier partnership may be ended with sixty days written notice.",
    )?;
    fs::write(
        root.join("retry.rs"),
        "pub fn exponential_backoff(attempt: u32) -> u64 { 100 * 2_u64.pow(attempt.min(8)) }\n",
    )?;
    let db = temp.path().join("index.db");
    let mut lexical = SearchIndex::open(&db)?;
    lexical.index_folder(&root)?;
    let (mut service, calls) = google(&db)?;
    service.index_embeddings()?;
    let first = chunks(&db)?;
    assert_eq!(first.len(), 2);
    let initial = calls.lock().unwrap().clone();
    assert_eq!(initial.documents, 2);
    service.index_embeddings()?;
    assert_eq!(
        *calls.lock().unwrap(),
        initial,
        "Unchanged groups must use zero inference"
    );
    assert_eq!(
        chunks(&db)?,
        first,
        "Real vector bytes and locations must survive reuse"
    );

    let moved = root.join("nested");
    fs::create_dir(&moved)?;
    fs::rename(&document, moved.join("agreement.txt"))?;
    lexical.index_folder(&root)?;
    service.index_embeddings()?;
    assert_eq!(
        *calls.lock().unwrap(),
        initial,
        "Folder-only moves retain the Google title"
    );
    let after_move = chunks(&db)?;
    let original = first
        .iter()
        .find(|c| c.0.ends_with("agreement.txt"))
        .unwrap();
    let relocated = after_move
        .iter()
        .find(|c| c.0.ends_with("agreement.txt"))
        .unwrap();
    assert_eq!(relocated.6, original.6);
    assert!(Path::new(&relocated.0).starts_with(moved.canonicalize()?));
    let results = service.search_semantic(
        "How can we stop working with the vendor?",
        10,
        &SearchOptions::default(),
    )?;
    assert_eq!(results[0].filename, "agreement.txt");
    assert!(results[0].source.is_some());

    fs::rename(
        moved.join("agreement.txt"),
        moved.join("supplier-contract.txt"),
    )?;
    lexical.index_folder(&root)?;
    service.index_embeddings()?;
    assert_eq!(
        calls.lock().unwrap().documents,
        initial.documents + 1,
        "Basename changes alter Google's document title prompt"
    );
    fs::write(
        moved.join("supplier-contract.txt"),
        "The supplier partnership may be ended with ninety days written notice.",
    )?;
    lexical.index_folder(&root)?;
    service.index_embeddings()?;
    assert_eq!(calls.lock().unwrap().documents, initial.documents + 2);
    let code_before = first.iter().find(|c| c.0.ends_with("retry.rs")).unwrap();
    let latest = chunks(&db)?;
    assert_eq!(
        latest.iter().find(|c| c.0.ends_with("retry.rs")).unwrap(),
        code_before
    );
    Ok(())
}

fn ffmpeg(tools: &searchi_service::FfmpegTools, output: &Path, arguments: &[&str]) -> Result<()> {
    let result = std::process::Command::new(&tools.ffmpeg)
        .args([
            "-hide_banner",
            "-loglevel",
            "error",
            "-nostdin",
            "-y",
            "-threads",
            "1",
        ])
        .args(arguments)
        .arg(output)
        .output()?;
    anyhow::ensure!(
        result.status.success(),
        "CPU fixture encoding failed: {}",
        String::from_utf8_lossy(&result.stderr)
    );
    Ok(())
}

#[test]
#[ignore = "Requires verified Google assets, normal worker and CPU FFmpeg helpers"]
fn genuine_google_mixed_media_reuse_checks_bytes_despite_identical_file_metadata() -> Result<()> {
    let tools = searchi_service::FfmpegTools {
        ffmpeg: std::env::var_os("SEARCHI_TEST_FFMPEG")
            .expect("Set SEARCHI_TEST_FFMPEG")
            .into(),
        ffprobe: std::env::var_os("SEARCHI_TEST_FFPROBE")
            .expect("Set SEARCHI_TEST_FFPROBE")
            .into(),
    };
    let temp = tempfile::tempdir()?;
    let root = temp.path().join("mixed");
    fs::create_dir(&root)?;
    fs::write(
        root.join("agreement.txt"),
        "The supplier may terminate the partnership with sixty days written notice.",
    )?;
    fs::write(
        root.join("retry.rs"),
        "pub fn retry_delay(attempt: u32) -> u64 { 100 * 2_u64.pow(attempt.min(8)) }\n",
    )?;
    let image = root.join("color.bmp");
    ffmpeg(
        &tools,
        &image,
        &[
            "-f",
            "lavfi",
            "-i",
            "color=c=red:s=64x64",
            "-frames:v",
            "1",
            "-c:v",
            "bmp",
        ],
    )?;
    ffmpeg(
        &tools,
        &root.join("tone.wav"),
        &[
            "-f",
            "lavfi",
            "-i",
            "sine=frequency=440:duration=1",
            "-c:a",
            "pcm_s16le",
            "-ar",
            "16000",
            "-ac",
            "1",
        ],
    )?;
    ffmpeg(
        &tools,
        &root.join("scene.mp4"),
        &[
            "-f",
            "lavfi",
            "-i",
            "color=c=blue:s=64x64:r=2:d=1",
            "-an",
            "-c:v",
            "mpeg4",
        ],
    )?;
    let db = temp.path().join("index.db");
    let mut lexical = SearchIndex::open(&db)?;
    lexical.index_folder(&root)?;
    let (mut service, calls) = google(&db)?;
    let limits = searchi_service::MediaLimits::default();
    service.index_embeddings_with_media(&tools, &limits)?;
    let first = chunks(&db)?;
    for name in [
        "agreement.txt",
        "retry.rs",
        "color.bmp",
        "tone.wav",
        "scene.mp4",
    ] {
        assert!(
            first.iter().any(|chunk| chunk.0.ends_with(name)),
            "Missing actual source {name}"
        );
    }
    let initial = calls.lock().unwrap().clone();
    assert_eq!(initial.documents, 2);
    assert!(initial.images >= 2 && initial.audio >= 1);
    service.index_embeddings_with_media(&tools, &limits)?;
    assert_eq!(
        *calls.lock().unwrap(),
        initial,
        "All five complete source groups must avoid repeated inference"
    );
    assert_eq!(chunks(&db)?, first);

    let metadata = fs::metadata(&image)?;
    let before = fs::read(&image)?;
    ffmpeg(
        &tools,
        &image,
        &[
            "-f",
            "lavfi",
            "-i",
            "color=c=green:s=64x64",
            "-frames:v",
            "1",
            "-c:v",
            "bmp",
        ],
    )?;
    assert_eq!(fs::metadata(&image)?.len(), metadata.len());
    assert_ne!(fs::read(&image)?, before);
    fs::File::options()
        .write(true)
        .open(&image)?
        .set_times(fs::FileTimes::new().set_modified(metadata.modified()?))?;
    assert_eq!(fs::metadata(&image)?.modified()?, metadata.modified()?);
    // Core intentionally sees unchanged size/mtime: semantic reuse must still
    // hash actual media bytes before accepting a completion manifest.
    lexical.index_folder(&root)?;
    service.index_embeddings_with_media(&tools, &limits)?;
    let changed = calls.lock().unwrap().clone();
    assert_eq!(changed.documents, initial.documents);
    assert_eq!(changed.audio, initial.audio);
    assert_eq!(changed.images, initial.images + 1);
    let latest = chunks(&db)?;
    for chunk in first.iter().filter(|chunk| !chunk.0.ends_with("color.bmp")) {
        assert!(
            latest.contains(chunk),
            "Unaffected vector and citation changed"
        );
    }
    assert_ne!(
        latest
            .iter()
            .find(|chunk| chunk.0.ends_with("color.bmp"))
            .unwrap()
            .6,
        first
            .iter()
            .find(|chunk| chunk.0.ends_with("color.bmp"))
            .unwrap()
            .6
    );
    Ok(())
}

#[test]
#[ignore = "Requires verified Google assets and normal native worker; CPU only"]
fn genuine_google_activation_failure_resumes_completed_vectors_after_reopen() -> Result<()> {
    let temp = tempfile::tempdir()?;
    let root = temp.path().join("documents");
    fs::create_dir(&root)?;
    let file = root.join("agreement.txt");
    fs::write(
        &file,
        "The supplier agreement ends with sixty days written notice.",
    )?;
    let db = temp.path().join("index.db");
    let mut lexical = SearchIndex::open(&db)?;
    lexical.index_folder(&root)?;
    let (mut service, calls) = google(&db)?;
    service.index_embeddings()?;
    let connection = Connection::open(&db)?;
    let active = connection.query_row(
        "SELECT active_generation FROM semantic_meta WHERE singleton=1",
        [],
        |r| r.get::<_, i64>(0),
    )?;
    fs::write(
        &file,
        "The supplier agreement ends with ninety days written notice.",
    )?;
    lexical.index_folder(&root)?;
    connection.execute_batch("CREATE TRIGGER reject_incremental_activation BEFORE UPDATE OF active_generation ON semantic_meta BEGIN SELECT RAISE(ABORT,'injected incremental activation failure'); END;")?;
    let failure = service.index_embeddings().unwrap_err();
    assert!(format!("{failure:#}").contains("injected incremental activation failure"));
    assert_eq!(
        connection.query_row(
            "SELECT active_generation FROM semantic_meta WHERE singleton=1",
            [],
            |r| r.get::<_, i64>(0)
        )?,
        active
    );
    assert_eq!(calls.lock().unwrap().documents, 2);
    assert!(
        service
            .search_semantic("supplier agreement", 10, &SearchOptions::default())?
            .is_empty(),
        "Changed old source cannot remain readable"
    );
    drop(service);
    connection.execute_batch("DROP TRIGGER reject_incremental_activation;")?;
    let (mut reopened, resumed_calls) = google(&db)?;
    reopened.index_embeddings()?;
    assert_eq!(
        resumed_calls.lock().unwrap().documents,
        0,
        "Durable completed source must survive reopen after failed activation"
    );
    let results = reopened.search_semantic(
        "How much notice ends the supplier agreement?",
        10,
        &SearchOptions::default(),
    )?;
    assert_eq!(results.len(), 1);
    assert!(results[0].snippet.contains("ninety days"));
    assert!(results[0].source.is_some());
    Ok(())
}