use kebab_parse_code::skip::{BUILTIN_BLACKLIST, is_generated_file, is_oversized};
use std::fs;
use tempfile::NamedTempFile;

#[test]
fn generated_header_markers_trigger_skip() {
    let cases = [
        "// @generated\nfn foo() {}\n",
        "// Code generated by tonic-build. DO NOT EDIT.\nfn x() {}\n",
        "/* DO NOT EDIT */\nfn x() {}\n",
        "/* do not modify */\nfn x() {}\n",
        "// AUTOMATICALLY GENERATED\nfn x() {}\n",
        "# auto-generated\ndef x(): pass\n",
        "// autogenerated\nfn x() {}\n",
    ];
    for content in cases {
        let f = NamedTempFile::new().unwrap();
        fs::write(f.path(), content).unwrap();
        assert!(is_generated_file(f.path()).unwrap(), "content: {content:?}");
    }
}

#[test]
fn normal_code_is_not_flagged_generated() {
    let f = NamedTempFile::new().unwrap();
    fs::write(f.path(), "fn main() {\n    println!(\"hi\");\n}\n").unwrap();
    assert!(!is_generated_file(f.path()).unwrap());
}

#[test]
fn is_generated_returns_false_for_empty_file() {
    let f = NamedTempFile::new().unwrap();
    fs::write(f.path(), "").unwrap();
    assert!(!is_generated_file(f.path()).unwrap());
}

#[test]
fn oversized_by_bytes_returns_true() {
    let f = NamedTempFile::new().unwrap();
    let body: String = "x".repeat(300_000);
    fs::write(f.path(), &body).unwrap();
    assert!(is_oversized(f.path(), 262_144, 5_000).unwrap());
}

#[test]
fn oversized_by_lines_returns_true() {
    let f = NamedTempFile::new().unwrap();
    let body: String = "x\n".repeat(6_000);
    fs::write(f.path(), &body).unwrap();
    assert!(is_oversized(f.path(), 262_144, 5_000).unwrap());
}

#[test]
fn small_file_returns_false_for_oversize() {
    let f = NamedTempFile::new().unwrap();
    fs::write(f.path(), "fn foo() {}\n").unwrap();
    assert!(!is_oversized(f.path(), 262_144, 5_000).unwrap());
}

#[test]
fn builtin_blacklist_has_exactly_six_entries() {
    assert_eq!(BUILTIN_BLACKLIST.len(), 6);
    let expected = [
        "**/node_modules/**",
        "**/target/**",
        "**/__pycache__/**",
        "**/.venv/**",
        "**/venv/**",
        "**/env/**",
    ];
    for pat in expected {
        assert!(BUILTIN_BLACKLIST.contains(&pat), "missing pattern: {pat}");
    }
}