// file: crates/ksp-logging-lib/tests/ownership.rs
// version: 3

//! Integration audit ensuring KSP crates do not bypass the logging facade.

fn manifest_declares_direct_dependency(manifest: &str, dependency_name: &str) -> bool {
    let mut section = "";
    for raw_line in manifest.lines() {
        let line = raw_line.trim();
        if line.starts_with('[') && line.ends_with(']') {
            section = &line[1..line.len() - 1];
            let direct_table_suffix = std::format!(".dependencies.{dependency_name}");
            if section == std::format!("dependencies.{dependency_name}")
                || section == std::format!("dev-dependencies.{dependency_name}")
                || section == std::format!("build-dependencies.{dependency_name}")
                || section.ends_with(direct_table_suffix.as_str())
            {
                return true;
            }
            continue;
        }
        if line.is_empty() || line.starts_with('#') {
            continue;
        }
        let dependency_section = section == "dependencies"
            || section == "dev-dependencies"
            || section == "build-dependencies"
            || section.ends_with(".dependencies")
            || section.ends_with(".dev-dependencies")
            || section.ends_with(".build-dependencies");
        if !dependency_section {
            continue;
        }
        let assignment = line.split_once('=');
        let name = match assignment {
            std::option::Option::Some((name, _)) => name.trim(),
            std::option::Option::None => continue,
        };
        if name == dependency_name || name == std::format!("{dependency_name}.workspace") {
            return true;
        }
    }
    return false;
}

fn source_uses_direct_path(source: &str, path: &str) -> bool {
    let mut search_start = 0usize;
    while search_start < source.len() {
        let remaining = &source[search_start..];
        let relative_index = match remaining.find(path) {
            std::option::Option::Some(index) => index,
            std::option::Option::None => return false,
        };
        let index = search_start + relative_index;
        if index == 0 {
            return true;
        }
        let previous = source[..index].chars().next_back();
        let embedded_in_identifier = match previous {
            std::option::Option::Some(character) => character.is_ascii_alphanumeric() || character == '_',
            std::option::Option::None => false,
        };
        if !embedded_in_identifier {
            return true;
        }
        search_start = index + path.len();
    }
    return false;
}

fn collect_rust_files(directory: &std::path::Path, files: &mut std::vec::Vec<std::path::PathBuf>) {
    let entries_result = std::fs::read_dir(directory);
    let entries = match entries_result {
        std::result::Result::Ok(entries) => entries,
        std::result::Result::Err(_) => return,
    };
    for entry_result in entries {
        let entry = match entry_result {
            std::result::Result::Ok(entry) => entry,
            std::result::Result::Err(_) => continue,
        };
        let path = entry.path();
        if path.is_dir() {
            collect_rust_files(path.as_path(), files);
            continue;
        }
        if path.extension().and_then(std::ffi::OsStr::to_str) == std::option::Option::Some("rs") {
            files.push(path);
        }
    }
}

#[test]
fn dependency_scanner_distinguishes_tauri_plugin_tracing_from_tracing() {
    let plugin_only = "[dependencies]\ntauri-plugin-tracing.workspace = true\n";
    let direct_workspace = "[dependencies]\ntracing.workspace = true\n";
    let direct_inline = "[dependencies]\ntracing = { workspace = true }\n";
    let direct_table = "[dependencies.tracing]\nworkspace = true\n";
    assert!(!manifest_declares_direct_dependency(plugin_only, "tracing"));
    assert!(manifest_declares_direct_dependency(direct_workspace, "tracing"));
    assert!(manifest_declares_direct_dependency(direct_inline, "tracing"));
    assert!(manifest_declares_direct_dependency(direct_table, "tracing"));
    assert!(!source_uses_direct_path("let plugin = tauri_plugin_tracing::Builder::new();", "tracing::"));
    assert!(source_uses_direct_path("let span = tracing::info_span!(\"audit\");", "tracing::"));
}

#[test]
fn workspace_crates_do_not_bypass_ksp_logging_facade() {
    let logging_manifest_directory = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
    let workspace_root = match logging_manifest_directory.parent().and_then(std::path::Path::parent) {
        std::option::Option::Some(root) => root,
        std::option::Option::None => return,
    };
    let crates_directory = workspace_root.join("crates");
    let entries_result = std::fs::read_dir(crates_directory.as_path());
    assert!(entries_result.is_ok(), "unable to inspect workspace crates at {}", crates_directory.display());
    let entries = match entries_result {
        std::result::Result::Ok(entries) => entries,
        std::result::Result::Err(_) => return,
    };
    for entry_result in entries {
        let entry = match entry_result {
            std::result::Result::Ok(entry) => entry,
            std::result::Result::Err(_) => continue,
        };
        let crate_path = entry.path();
        if !crate_path.is_dir() || entry.file_name() == std::ffi::OsStr::new("ksp-logging-lib") {
            continue;
        }
        let manifest_path = crate_path.join("Cargo.toml");
        if manifest_path.exists() {
            let manifest_result = std::fs::read_to_string(manifest_path.as_path());
            assert!(manifest_result.is_ok(), "unable to read {}", manifest_path.display());
            let manifest = match manifest_result {
                std::result::Result::Ok(manifest) => manifest,
                std::result::Result::Err(_) => continue,
            };
            assert!(!manifest_declares_direct_dependency(manifest.as_str(), "tracing"), "{} depends directly on tracing", manifest_path.display(),);
            assert!(
                !manifest_declares_direct_dependency(manifest.as_str(), "tracing-subscriber"),
                "{} depends directly on tracing-subscriber",
                manifest_path.display(),
            );
            assert!(
                !manifest_declares_direct_dependency(manifest.as_str(), "tracing-appender"),
                "{} depends directly on tracing-appender",
                manifest_path.display(),
            );
        }
        let mut rust_files = std::vec::Vec::new();
        collect_rust_files(crate_path.as_path(), &mut rust_files);
        for rust_file in rust_files {
            let source_result = std::fs::read_to_string(rust_file.as_path());
            assert!(source_result.is_ok(), "unable to read {}", rust_file.display());
            let source = match source_result {
                std::result::Result::Ok(source) => source,
                std::result::Result::Err(_) => continue,
            };
            assert!(!source_uses_direct_path(source.as_str(), "tracing::"), "{} bypasses ksp-logging-lib via tracing", rust_file.display());
            assert!(
                !source_uses_direct_path(source.as_str(), "ksp_logging_lib::tracing::"),
                "{} bypasses ksp-logging-lib via its hidden tracing bridge",
                rust_file.display(),
            );
            assert!(
                !source_uses_direct_path(source.as_str(), "tracing_subscriber::"),
                "{} bypasses ksp-logging-lib via tracing-subscriber",
                rust_file.display(),
            );
            assert!(!source_uses_direct_path(source.as_str(), "tracing_appender::"), "{} bypasses ksp-logging-lib via tracing-appender", rust_file.display(),);
        }
    }
}