use std::fs;
use tempfile::tempdir;
use prometeu_compiler::compiler;

#[test]
fn test_project_root_and_entry_resolution() {
    let dir = tempdir().unwrap();
    let project_dir = dir.path();
    
    // Create prometeu.json
    fs::write(
        project_dir.join("prometeu.json"),
        r#"{
            "script_fe": "pbs",
            "entry": "src/main.pbs"
        }"#,
    ).unwrap();
    
    // Create src directory and main.pbs
    fs::create_dir(project_dir.join("src")).unwrap();
    fs::write(project_dir.join("src/main.pbs"), "").unwrap();
    
    // Call compile
    let result = compiler::compile(project_dir);
    
    // It should fail with "Frontend 'pbs' not yet implemented" 
    // but ONLY after successfully loading the config and resolving the entry.
    
    match result {
        Err(e) => {
            let msg = e.to_string();
            assert!(msg.contains("Frontend 'pbs' not yet implemented"), "Unexpected error: {}", msg);
        }
        Ok(_) => panic!("Should have failed as pbs is not implemented yet"),
    }
}