using System.Collections;
using System.Globalization;
using System.Resources;
using SharepointToolbox.Localization;

namespace SharepointToolbox.Tests.Localization;

[Trait("Category", "Unit")]
public class LocaleCompletenessTests
{
    /// <summary>
    /// Verifies every EN key in Strings.resx has a non-empty, non-bracketed FR translation.
    /// </summary>
    [Fact]
    public void AllEnKeys_HaveNonEmptyFrTranslation()
    {
        var rm = new ResourceManager("SharepointToolbox.Localization.Strings", typeof(Strings).Assembly);
        var enResourceSet = rm.GetResourceSet(CultureInfo.InvariantCulture, true, true);
        Assert.NotNull(enResourceSet);

        var frCulture = new CultureInfo("fr");
        var failures = new List<string>();

        foreach (DictionaryEntry entry in enResourceSet)
        {
            var key = entry.Key?.ToString();
            if (string.IsNullOrEmpty(key)) continue;

            var frValue = rm.GetString(key, frCulture);
            if (string.IsNullOrWhiteSpace(frValue))
            {
                failures.Add($"  [{key}]: null or whitespace");
            }
            else if (frValue.StartsWith("[", StringComparison.Ordinal))
            {
                failures.Add($"  [{key}]: bracketed fallback — '{frValue}'");
            }
        }

        Assert.True(failures.Count == 0,
            $"The following {failures.Count} key(s) are missing or invalid in Strings.fr.resx:\n" +
            string.Join("\n", failures));
    }

    /// <summary>
    /// Spot-checks 5 keys that must contain diacritics after Plan 02 fixes.
    /// This test FAILS until Plan 02 corrects the FR translations.
    /// </summary>
    [Fact]
    public void FrStrings_ContainExpectedDiacritics()
    {
        var rm = new ResourceManager("SharepointToolbox.Localization.Strings", typeof(Strings).Assembly);
        var frCulture = new CultureInfo("fr");
        var failures = new List<string>();

        void CheckDiacritic(string key, char expectedChar)
        {
            var value = rm.GetString(key, frCulture);
            if (value == null || !value.Contains(expectedChar))
            {
                failures.Add($"  [{key}] = '{value ?? "(null)"}' — expected to contain '{expectedChar}'");
            }
        }

        // Déplacer must contain é (currently "Deplacer")
        CheckDiacritic("transfer.mode.move", 'é');

        // Créer les sites must contain é (currently "Creer les sites")
        CheckDiacritic("bulksites.execute", 'é');

        // Modèles enregistrés must contain è (currently "Modeles enregistres")
        CheckDiacritic("templates.list", 'è');

        // Terminé : {0} réussis, {1} échoués must contain é (currently "Termine : ...")
        CheckDiacritic("bulk.result.success", 'é');

        // Bibliothèque cible must contain è (currently "Bibliotheque cible")
        CheckDiacritic("folderstruct.library", 'è');

        Assert.True(failures.Count == 0,
            $"The following {failures.Count} key(s) are missing expected diacritics in Strings.fr.resx " +
            $"(fix in Plan 02):\n" + string.Join("\n", failures));
    }
}