import XCTest
@testable import HermesPrediction

private struct TestFailure: Error, CustomStringConvertible {
    let description: String
}

@MainActor
final class LocalizationStoreTests: XCTestCase {
    func testEnglishBundleStringsLoad() throws {
        let store = LocalizationStore(localeCode: "en")

        try expectEqual(store.string(for: "app.name"), "Hermes")
        try expectEqual(store.string(for: "settings.title"), "Settings")
        try expectEqual(store.string(for: "settings.enabled"), "Enabled")
    }

    func testSwedishBundleStringsLoad() throws {
        let store = LocalizationStore(localeCode: "sv")

        try expectEqual(store.string(for: "app.name"), "Hermes")
        try expectEqual(store.string(for: "settings.title"), "Inställningar")
        try expectEqual(store.string(for: "settings.enabled"), "Aktiverad")
    }

    func testUnsupportedLocaleFallsBackToEnglish() throws {
        let store = LocalizationStore(localeCode: "fr")

        try expectEqual(store.string(for: "settings.analytics"), "Analytics")
        try expectEqual(store.localeName(for: "sv", displayLocaleCode: "fr"), "Swedish")
    }

    private func expectEqual(_ actual: String, _ expected: String) throws {
        guard actual == expected else {
            throw TestFailure(description: "Expected \(expected), got \(actual)")
        }
    }
}