import Foundation
import Testing
@testable import CardsNative

@Suite("Typing-Match")
struct TypingTests {
    @Test("Exact match → correct")
    func exactMatch() {
        #expect(Typing.check(input: "Berlin", answer: "Berlin") == .correct)
    }

    @Test("Case + Whitespace normalisiert")
    func caseAndWhitespace() {
        #expect(Typing.check(input: "  berlin  ", answer: "Berlin") == .correct)
        #expect(Typing.check(input: "BERLIN", answer: "berlin") == .correct)
    }

    @Test("Umlaute via NFD-Diakritika-Stripping")
    func umlauts() {
        #expect(Typing.check(input: "Munchen", answer: "München") == .correct)
        #expect(Typing.check(input: "muenchen", answer: "München") != .correct)
        // muenchen != munchen via NFD: ä → a, aber ue ≠ ü
    }

    @Test("Aliases akzeptiert als correct")
    func aliasesCorrect() {
        let aliases = "Frankfurt am Main,Frankfurt/Main"
        #expect(Typing.check(input: "Frankfurt/Main", answer: "Frankfurt", aliases: aliases) == .correct)
    }

    @Test("Levenshtein-1 bei 5+ Zeichen → close")
    func closeMatch() {
        #expect(Typing.check(input: "Berln", answer: "Berlin") == .close)
        #expect(Typing.check(input: "Berlim", answer: "Berlin") == .close)
    }

    @Test("Großer Unterschied → wrong")
    func wrongMatch() {
        #expect(Typing.check(input: "Madrid", answer: "Berlin") == .wrong)
    }

    @Test("Leer-Input → wrong")
    func emptyInput() {
        #expect(Typing.check(input: "", answer: "Berlin") == .wrong)
        #expect(Typing.check(input: "   ", answer: "Berlin") == .wrong)
    }

    @Test("Levenshtein-Helper")
    func levenshteinSanity() {
        #expect(Typing.levenshtein("", "") == 0)
        #expect(Typing.levenshtein("abc", "abc") == 0)
        #expect(Typing.levenshtein("abc", "abd") == 1)
        #expect(Typing.levenshtein("kitten", "sitting") == 3)
    }
}