//! Integration tests for CAD workspace and file store.
//!
//! These tests cover file-backed CAD operations and active project state.
//! Full widget UI tests would require the makepad test harness (window + event loop).

use std::fs;
use std::path::PathBuf;

/// Helper: creates a unique temporary directory and returns its path.
fn temp_dir() -> PathBuf {
    let dir = std::env::temp_dir().join(format!(
        "nigig_cad_test_{}_{}",
        std::process::id(),
        rand_id()
    ));
    fs::create_dir_all(&dir).unwrap();
    dir
}

fn rand_id() -> u64 {
    use std::time::{SystemTime, UNIX_EPOCH};
    SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .map(|d| d.as_nanos() as u64)
        .unwrap_or(0)
}

fn cleanup(dir: &PathBuf) {
    let _ = fs::remove_dir_all(dir);
}

// ── cad_store file tests ─────────────────────────────────────────

#[test]
fn save_and_load_cad_script_by_path() {
    let dir = temp_dir();
    let path = dir.join("test_project.cad");

    let script = "render(cube(1.0, 1.0, 1.0, true))";
    nigig_build::cad_store::save_cad_script_to_path(&path, script).unwrap();

    assert!(path.exists());
    let loaded = nigig_build::cad_store::load_cad_script_from_path(&path).unwrap();
    assert_eq!(loaded, script);

    cleanup(&dir);
}

#[test]
fn load_nonexistent_script_returns_error() {
    let dir = temp_dir();
    let path = dir.join("nonexistent.cad");

    let result = nigig_build::cad_store::load_cad_script_from_path(&path);
    assert!(result.is_err());

    cleanup(&dir);
}

#[test]
fn save_cad_script_creates_parent_dirs() {
    let dir = temp_dir();
    let path = dir.join("subdir").join("nested").join("model.cad");

    nigig_build::cad_store::save_cad_script_to_path(&path, "render(sphere(0.5, 16, 8))").unwrap();
    assert!(path.exists());

    cleanup(&dir);
}

#[test]
fn save_and_load_empty_script() {
    let dir = temp_dir();
    let path = dir.join("empty.cad");

    nigig_build::cad_store::save_cad_script_to_path(&path, "").unwrap();
    let loaded = nigig_build::cad_store::load_cad_script_from_path(&path).unwrap();
    assert_eq!(loaded, "");

    cleanup(&dir);
}

#[test]
fn save_and_load_unicode_script() {
    let dir = temp_dir();
    let path = dir.join("unicode.cad");

    let script = "// Note: 尺寸测试\nrender(cube(1.0, 2.0, 3.0, true))";
    nigig_build::cad_store::save_cad_script_to_path(&path, script).unwrap();
    let loaded = nigig_build::cad_store::load_cad_script_from_path(&path).unwrap();
    assert_eq!(loaded, script);

    cleanup(&dir);
}

#[test]
fn overwrite_existing_script() {
    let dir = temp_dir();
    let path = dir.join("overwrite.cad");

    nigig_build::cad_store::save_cad_script_to_path(&path, "version 1").unwrap();
    nigig_build::cad_store::save_cad_script_to_path(&path, "version 2").unwrap();

    let loaded = nigig_build::cad_store::load_cad_script_from_path(&path).unwrap();
    assert_eq!(loaded, "version 2");

    cleanup(&dir);
}

// ── ActiveProject state tests ────────────────────────────────────

#[test]
fn active_project_defaults_to_none() {
    let p = nigig_build::cad_store::get_active_project();
    assert!(p.is_none());
}

#[test]
fn set_and_get_active_project() {
    nigig_build::cad_store::set_active_project(nigig_build::cad_store::ActiveProject {
        id: "proj_42".into(),
        name: "Test Project".into(),
    });

    let p = nigig_build::cad_store::get_active_project().unwrap();
    assert_eq!(p.id, "proj_42");
    assert_eq!(p.name, "Test Project");

    nigig_build::cad_store::clear_active_project();
    assert!(nigig_build::cad_store::get_active_project().is_none());
}

#[test]
fn set_active_project_overwrites_previous() {
    nigig_build::cad_store::set_active_project(nigig_build::cad_store::ActiveProject {
        id: "first".into(),
        name: "First".into(),
    });
    nigig_build::cad_store::set_active_project(nigig_build::cad_store::ActiveProject {
        id: "second".into(),
        name: "Second".into(),
    });

    let p = nigig_build::cad_store::get_active_project().unwrap();
    assert_eq!(p.id, "second");
    assert_eq!(p.name, "Second");

    nigig_build::cad_store::clear_active_project();
}

// ── project_store + cad_store integration tests ──────────────────

#[test]
fn active_project_id_matches_cad_file_path() {
    let id = format!("proj_{}", rand_id());

    nigig_build::cad_store::set_active_project(nigig_build::cad_store::ActiveProject {
        id: id.clone(),
        name: "Integration".into(),
    });

    let p = nigig_build::cad_store::get_active_project().unwrap();
    let file_path = nigig_build::cad_store::cad_file_path(&p.id);

    let expected_name = format!("{}.cad", id);
    assert!(
        file_path.to_string_lossy().ends_with(&expected_name),
        "file path {} should end with {}",
        file_path.display(),
        expected_name
    );

    nigig_build::cad_store::clear_active_project();
}

// ── Placeholder for future widget-level UI tests ─────────────────

// To write UI integration tests for CadWorkspace, BuildProjectsPage, etc.,
// you need the makepad test framework which provides:
//   - LiveSet / LiveDependency loading
//   - AppMain with test harness
//   - Widget construction via register_widget
//   - Event simulation (finger_down, finger_up, etc.)
//
// Example structure (see makepad examples/test.rs):
//
//   #[test]
//   fn cad_workspace_opens_with_default_script() {
//       let mut app = TestApp::new();
//       app.load_live_set(include_str!("..."));
//       app.init();
//       let ws = app.widget(ids!(CadWorkspace));
//       let editor = ws.widget(ids!(cad_editor));
//       assert!(editor.text().contains("cube"));
//   }