use alpha_id::model::{AlphaIdEntry, Config, IndexStatus};
use alpha_id::pipeline::load_packed_or_store;
use std::path::Path;
use std::process::Command;

// Write a minimal config TOML pointing the corpus + index dir at temp paths.
// The `--pack` branch only reads `alpha_id_path` (corpus) and `index_dir`
// (store); `claml_path` etc. are present for parse but unused on this path.
fn write_config(dir: &Path, corpus: &Path, index_dir: &Path) -> std::path::PathBuf {
    let toml = format!(
        r#"ionos_base_url = "http://127.0.0.1:1"
token_path = "/nonexistent"
embed_model = "test/model"
rerank_model = "test/rerank"
alpha_id_path = "{corpus}"
claml_path = "/nonexistent.xml"
index_dir = "{index}"
pool_size = 10
top_k = 10
"#,
        corpus = corpus.to_str().unwrap(),
        index = index_dir.to_str().unwrap(),
    );
    let p = dir.join("config.toml");
    std::fs::write(&p, toml).unwrap();
    p
}

fn corpus_line(text: &str) -> String {
    // Alpha-ID format: valid|alpha_id|primary|star|addon|primary2|orpha|text
    format!("1|A0001|A00|||||{text}")
}

#[test]
fn pack_refuses_incomplete_store_exit_2() {
    let dir = tempfile::tempdir().unwrap();
    let corpus = dir.path().join("corpus.txt");
    std::fs::write(&corpus, format!("{}\n{}\n", corpus_line("alpha"), corpus_line("beta"))).unwrap();
    let index_dir = dir.path().join("index");
    std::fs::create_dir_all(&index_dir).unwrap();
    let config = write_config(dir.path(), &corpus, &index_dir);

    let out = Command::new(env!("CARGO_BIN_EXE_alpha-id"))
        .args(["--config", config.to_str().unwrap(), "index", "--pack"])
        .output()
        .unwrap();
    assert_eq!(out.status.code(), Some(2), "incomplete store must exit 2");
    let stderr = String::from_utf8_lossy(&out.stderr);
    assert!(stderr.contains("store incomplete"), "stderr was: {stderr}");
}

#[test]
fn pack_writes_file_from_complete_store() {
    let dir = tempfile::tempdir().unwrap();
    let corpus = dir.path().join("corpus.txt");
    std::fs::write(&corpus, format!("{}\n{}\n", corpus_line("alpha"), corpus_line("beta"))).unwrap();
    let index_dir = dir.path().join("index");
    std::fs::create_dir_all(&index_dir).unwrap();

    // Populate the per-file store for both entry texts so the pack succeeds.
    let store = alpha_id::embed::EmbeddingStore::open(index_dir.to_str().unwrap(), "test/model").unwrap();
    store.put("alpha", &[1.0f32, 0.0]).unwrap();
    store.put("beta", &[0.0f32, 1.0]).unwrap();

    let config = write_config(dir.path(), &corpus, &index_dir);
    let out = Command::new(env!("CARGO_BIN_EXE_alpha-id"))
        .args(["--config", config.to_str().unwrap(), "index", "--pack"])
        .output()
        .unwrap();
    assert!(out.status.success(), "stderr: {}", String::from_utf8_lossy(&out.stderr));
    let packed = index_dir.join("packed.test_model.bin");
    assert!(packed.exists(), "packed file should be written at {}", packed.display());
}

fn entry(text: &str) -> AlphaIdEntry {
    AlphaIdEntry {
        alpha_id: "A0001".to_string(),
        valid: true,
        icd_primary: "A00".to_string(),
        icd_star: String::new(),
        icd_addon: String::new(),
        icd_primary2: String::new(),
        orpha: String::new(),
        text: text.to_string(),
    }
}

/// End-to-end seam: a packed file produced by the `index --pack` CLI loads back
/// through the production `load_packed_or_store` path as `IndexStatus::Ok` with a
/// usable index, with no per-file store consulted. This pins the cross-boundary
/// round trip (CLI writer ↔ pipeline reader) that the two halves' unit tests
/// each cover only one side of.
#[test]
fn cli_packed_file_loads_back_as_ok_index() {
    let dir = tempfile::tempdir().unwrap();
    let corpus = dir.path().join("corpus.txt");
    std::fs::write(&corpus, format!("{}\n{}\n", corpus_line("alpha"), corpus_line("beta"))).unwrap();
    let index_dir = dir.path().join("index");
    std::fs::create_dir_all(&index_dir).unwrap();

    let store = alpha_id::embed::EmbeddingStore::open(index_dir.to_str().unwrap(), "test/model").unwrap();
    store.put("alpha", &[1.0f32, 0.0]).unwrap();
    store.put("beta", &[0.0f32, 1.0]).unwrap();

    let config = write_config(dir.path(), &corpus, &index_dir);
    let out = Command::new(env!("CARGO_BIN_EXE_alpha-id"))
        .args(["--config", config.to_str().unwrap(), "index", "--pack"])
        .output()
        .unwrap();
    assert!(out.status.success(), "stderr: {}", String::from_utf8_lossy(&out.stderr));

    // Load the CLI-written packed file through the production path. The store
    // directory is removed first to prove the index comes from the packed file
    // alone, not the per-file store.
    std::fs::remove_dir_all(index_dir.join("embeddings")).unwrap();
    let mut cfg = Config::load(config.to_str().unwrap()).unwrap();
    cfg.index_dir = index_dir.to_str().unwrap().to_string();
    let entries = vec![entry("alpha"), entry("beta")];
    let (vector, status) = load_packed_or_store(&cfg, &entries);
    assert!(vector.is_some(), "packed file written by the CLI must yield an index");
    assert_eq!(status, IndexStatus::Ok);
}