use package_domain::{FileRule, ProjectKind};
use package_infra as infra;
use std::{fs, path::Path};

fn rule(id: &str, include: &[&str], required: bool) -> FileRule {
    FileRule {
        id: id.into(),
        source: "appPayload".into(),
        source_folder: String::new(),
        target_root: String::new(),
        include: include.iter().map(|p| (*p).into()).collect(),
        exclude: Vec::new(),
        target_relative_path: String::new(),
        required,
    }
}

fn write(root: &Path, relative: &str, bytes: &[u8]) {
    let path = root.join(relative);
    fs::create_dir_all(path.parent().unwrap()).unwrap();
    fs::write(path, bytes).unwrap();
}

/// A Windows program header whose optional header has no known format.
fn damaged_program() -> Vec<u8> {
    let mut bytes = vec![0u8; 0x40];
    bytes[..2].copy_from_slice(b"MZ");
    bytes[0x3c..0x40].copy_from_slice(&0x40u32.to_le_bytes());
    bytes.extend(b"PE\0\0");
    let mut coff = [0u8; 20];
    coff[16..18].copy_from_slice(&2u16.to_le_bytes());
    bytes.extend(coff);
    bytes.extend([0, 0]);
    bytes
}

fn project(temp: &Path) -> (infra::ProjectDocument, std::path::PathBuf) {
    let mut doc = infra::create_project(&temp.join("tool/Tool.isproj"), ProjectKind::Exe).unwrap();
    let payload = temp.join("payload");
    fs::create_dir_all(&payload).unwrap();
    doc.local
        .sources
        .insert("appPayload".into(), payload.to_str().unwrap().into());
    (doc, payload)
}

#[test]
fn runtime_configs_unreadable_programs_and_broken_rules_are_reported_without_hiding_the_rest() {
    let temp = tempfile::tempdir().unwrap();
    let (doc, payload) = project(temp.path());
    write(
        &payload,
        "App.runtimeconfig.json",
        br#"{"runtimeOptions":{"tfm":"net8.0","frameworks":[{"name":"Microsoft.NETCore.App","version":"8.0.0"},{"name":"Microsoft.WindowsDesktop.App","version":"8.0.0"}]}}"#,
    );
    write(&payload, "Self.runtimeconfig.json", br#"{"runtimeOptions":{"includedFrameworks":[{"name":"Microsoft.NETCore.App","version":"8.0.0"}]}}"#);
    write(&payload, "Broken.dll", &damaged_program());
    write(&payload, "Bad.runtimeconfig.json", b"{");
    write(&payload, "readme.txt", b"MZ");
    let rules = [
        rule("app", &["*"], true),
        rule("gone", &["missing.*"], true),
    ];
    let scan = infra::scan_prerequisites(&rules, &doc.local, doc.path.parent().unwrap(), "x86");
    let found: Vec<_> = scan.found.iter().map(|item| item.id.as_str()).collect();
    assert_eq!(
        found,
        ["dotnet8-desktop-x86"],
        "the project architecture stands in without App.exe"
    );
    assert_eq!(scan.found[0].reasons.len(), 2);
    assert!(
        scan.notes.is_empty() && scan.unsupported.is_empty(),
        "{scan:?}"
    );
    assert_eq!(scan.problems.len(), 4, "{:?}", scan.problems);
    assert!(scan.problems[0].starts_with("IncompleteFileList: 파일 규칙 1개를"));
    assert!(
        scan.problems[1].contains("gone") && scan.problems[1].contains("MissingRequiredFile"),
        "the unread rule names itself: {}",
        scan.problems[1]
    );
    assert!(scan
        .problems
        .iter()
        .any(|p| p.starts_with("Bad.runtimeconfig.json: InvalidRuntimeConfig")));
    assert!(scan
        .problems
        .iter()
        .any(|p| p.starts_with("Broken.dll: InvalidPeFile")));
}

/// The test program itself is built by MSVC with the shared C runtime, so it imports VCRUNTIME140.dll.
#[cfg(all(windows, target_env = "msvc"))]
#[test]
fn a_real_program_built_with_visual_cpp_asks_for_the_runtime_unless_it_ships_it() {
    let temp = tempfile::tempdir().unwrap();
    let (doc, payload) = project(temp.path());
    fs::copy(std::env::current_exe().unwrap(), payload.join("App.exe")).unwrap();
    let arch = if cfg!(target_arch = "x86") {
        "x86"
    } else {
        "x64"
    };
    let root = doc.path.parent().unwrap();
    let scan = infra::scan_prerequisites(&[rule("app", &["*"], true)], &doc.local, root, "x64");
    assert!(scan.problems.is_empty(), "{:?}", scan.problems);
    let vc = scan
        .found
        .iter()
        .find(|item| item.id == format!("vc14-{arch}"))
        .expect("Visual C++ runtime");
    assert!(vc.reasons.iter().all(|reason| reason.file == "App.exe"));

    write(&payload, "vcruntime140.dll", b"app-local copy");
    let shipped = infra::scan_prerequisites(&[rule("app", &["*"], true)], &doc.local, root, "x64");
    let vc = shipped
        .found
        .iter()
        .find(|item| item.id.starts_with("vc14-"));
    assert!(vc.is_none_or(|item| item
        .reasons
        .iter()
        .all(|r| !r.clue.to_lowercase().starts_with("vcruntime140.dll"))));
}