//! Integration tests for `secrets::manifest` — the manifest loader that
//! discovers secret files, parses them, and builds the known-secrets set.

use std::fs;

use dirigent_fermata::core::secrets::config::SecretsConfig;
use dirigent_fermata::core::secrets::manifest::Manifest;

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

/// Create a minimal config that only discovers `.env*` files and matches
/// common secret key patterns (the defaults).
fn default_config() -> SecretsConfig {
    SecretsConfig::default()
}

/// Create a config from TOML.
fn config_from_toml(toml: &str) -> SecretsConfig {
    SecretsConfig::from_toml(toml).expect("valid TOML config")
}

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------

#[test]
fn discovers_env_file_and_extracts_matching_secrets() {
    let dir = tempfile::tempdir().unwrap();
    fs::write(
        dir.path().join(".env"),
        "DATABASE_URL=postgres://localhost/db\nAPP_NAME=myapp\nSECRET_KEY=super-secret-value-1234\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    // DATABASE_URL and SECRET_KEY match the default key patterns; APP_NAME does not.
    assert!(!manifest.is_empty());

    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    assert!(keys.contains(&"DATABASE_URL"), "expected DATABASE_URL, got {keys:?}");
    assert!(keys.contains(&"SECRET_KEY"), "expected SECRET_KEY, got {keys:?}");
    assert!(!keys.contains(&"APP_NAME"), "APP_NAME should be filtered out");
}

#[test]
fn discovers_nested_env_local_file() {
    let dir = tempfile::tempdir().unwrap();
    let nested = dir.path().join("services").join("auth");
    fs::create_dir_all(&nested).unwrap();
    fs::write(
        nested.join(".env.local"),
        "AUTH_TOKEN=tok_abcdefgh12345678\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    assert!(!manifest.is_empty());
    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    assert!(keys.contains(&"AUTH_TOKEN"), "expected AUTH_TOKEN, got {keys:?}");
}

#[test]
fn filters_entries_by_key_patterns() {
    let dir = tempfile::tempdir().unwrap();
    fs::write(
        dir.path().join(".env"),
        "MY_PASSWORD=hunter2hunter2\nNOT_SENSITIVE=hello-world-1234\nAPI_KEY=abcdef1234567890\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    assert!(keys.contains(&"MY_PASSWORD"));
    assert!(keys.contains(&"API_KEY"));
    assert!(!keys.contains(&"NOT_SENSITIVE"));
}

#[test]
fn file_override_with_explicit_format_and_key_filter() {
    let dir = tempfile::tempdir().unwrap();
    // Write a file that wouldn't normally be discovered by default patterns.
    fs::write(
        dir.path().join("custom_secrets.conf"),
        "SERVICE_TOKEN=long-token-value-here\nDEBUG=true-ish-thing\n",
    )
    .unwrap();

    let config = config_from_toml(
        r#"
[files]
patterns = []

[[file]]
path = "custom_secrets.conf"
format = "env"
keys = ["SERVICE_TOKEN"]
"#,
    );

    let manifest = Manifest::build(&config, dir.path()).unwrap();

    assert_eq!(manifest.len(), 1);
    assert_eq!(manifest.entries()[0].key, "SERVICE_TOKEN");
    assert_eq!(manifest.entries()[0].value, "long-token-value-here");
}

#[test]
fn empty_project_yields_empty_manifest() {
    let dir = tempfile::tempdir().unwrap();
    // No files at all.
    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();
    assert!(manifest.is_empty());
    assert_eq!(manifest.len(), 0);
}

#[test]
fn entries_sorted_by_value_length_descending() {
    let dir = tempfile::tempdir().unwrap();
    fs::write(
        dir.path().join(".env"),
        // Deliberately out of order by length.
        "TOKEN_A=short1234\nTOKEN_B=a-much-longer-secret-value-here\nTOKEN_C=medium-value1\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    let lengths: Vec<usize> = manifest.entries().iter().map(|e| e.value.len()).collect();
    for window in lengths.windows(2) {
        assert!(
            window[0] >= window[1],
            "entries not sorted by value length descending: {lengths:?}"
        );
    }
}

#[test]
fn short_values_filtered_out() {
    let dir = tempfile::tempdir().unwrap();
    fs::write(
        dir.path().join(".env"),
        "PASSWORD_TINY=yes\nPASSWORD_OK=long-enough-password\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    // "yes" is 3 chars, below the 4-char minimum.
    assert!(!keys.contains(&"PASSWORD_TINY"), "short value should be filtered");
    assert!(keys.contains(&"PASSWORD_OK"));
}

#[test]
fn deduplication_of_same_key_value() {
    let dir = tempfile::tempdir().unwrap();

    // Same secret appears in two different .env files.
    fs::write(
        dir.path().join(".env"),
        "SECRET_KEY=shared-secret-value-12345\n",
    )
    .unwrap();

    let sub = dir.path().join("sub");
    fs::create_dir(&sub).unwrap();
    fs::write(sub.join(".env"), "SECRET_KEY=shared-secret-value-12345\n").unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    // Should be deduplicated to a single entry.
    let matching: Vec<_> = manifest
        .entries()
        .iter()
        .filter(|e| e.key == "SECRET_KEY")
        .collect();
    assert_eq!(
        matching.len(),
        1,
        "duplicate entries should be collapsed: found {}",
        matching.len()
    );
}

#[test]
fn unparseable_file_with_allow_is_skipped() {
    let dir = tempfile::tempdir().unwrap();
    // Write a file that looks like an env file but contains garbage TOML.
    // Actually, .env parser is lenient, so let's use a .toml extension
    // with invalid TOML content to trigger a parse error.
    let secrets_dir = dir.path();
    fs::write(secrets_dir.join("secrets.toml"), "this is not valid toml {{{\n").unwrap();

    // Also write a valid .env so we can confirm it still works.
    fs::write(
        secrets_dir.join(".env"),
        "API_KEY=valid-secret-12345678\n",
    )
    .unwrap();

    let config = config_from_toml(
        r#"
[enforcement]
on_parse_error = "allow"
"#,
    );

    let manifest = Manifest::build(&config, secrets_dir).unwrap();

    // The broken secrets.toml is skipped; .env is still processed.
    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    assert!(keys.contains(&"API_KEY"));
}

#[test]
fn unparseable_file_with_deny_returns_error() {
    let dir = tempfile::tempdir().unwrap();
    fs::write(dir.path().join("secrets.toml"), "not valid toml {{{\n").unwrap();

    let config = config_from_toml(
        r#"
[enforcement]
on_parse_error = "deny"
"#,
    );

    let result = Manifest::build(&config, dir.path());
    assert!(result.is_err(), "deny mode should propagate parse errors");
}

#[test]
fn manifest_empty_and_is_empty() {
    let m = Manifest::empty();
    assert!(m.is_empty());
    assert_eq!(m.len(), 0);
    assert!(m.entries().is_empty());
}

#[test]
fn skips_git_and_node_modules_directories() {
    let dir = tempfile::tempdir().unwrap();

    // .env inside .git should be skipped.
    let git_dir = dir.path().join(".git");
    fs::create_dir(&git_dir).unwrap();
    fs::write(git_dir.join(".env"), "SECRET_KEY=git-secret-12345\n").unwrap();

    // .env inside node_modules should be skipped.
    let nm_dir = dir.path().join("node_modules").join("pkg");
    fs::create_dir_all(&nm_dir).unwrap();
    fs::write(nm_dir.join(".env"), "TOKEN=nm-token-12345678\n").unwrap();

    // .env at root should be found.
    fs::write(
        dir.path().join(".env"),
        "API_KEY=root-api-key-12345\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    let values: Vec<&str> = manifest.entries().iter().map(|e| e.value.as_str()).collect();
    assert!(
        values.contains(&"root-api-key-12345"),
        "root .env should be found"
    );
    assert!(
        !values.contains(&"git-secret-12345"),
        ".git/.env should be skipped"
    );
    assert!(
        !values.contains(&"nm-token-12345678"),
        "node_modules/.env should be skipped"
    );
}

#[test]
fn opaque_file_formats_are_skipped_gracefully() {
    let dir = tempfile::tempdir().unwrap();
    // .pem and .key files match default patterns but have no parseable format.
    fs::write(dir.path().join("server.key"), "binary-ish key data here\n").unwrap();
    fs::write(
        dir.path().join(".env"),
        "PASSWORD=parseable-secret-12345\n",
    )
    .unwrap();

    let config = default_config();
    let manifest = Manifest::build(&config, dir.path()).unwrap();

    // Should not error, should still find the .env entry.
    let keys: Vec<&str> = manifest.entries().iter().map(|e| e.key.as_str()).collect();
    assert!(keys.contains(&"PASSWORD"));
}