using System.Text.Json;

namespace ClaudeDo.Localization;

public static class LocaleJson
{
    public static LocaleFile Parse(string json)
    {
        using var doc = JsonDocument.Parse(json);
        var root = doc.RootElement;

        var code = "";
        var name = "";
        if (root.TryGetProperty("metadata", out var meta) && meta.ValueKind == JsonValueKind.Object)
        {
            if (meta.TryGetProperty("code", out var c)) code = c.GetString() ?? "";
            if (meta.TryGetProperty("name", out var n)) name = n.GetString() ?? "";
        }

        var strings = new Dictionary<string, string>(StringComparer.Ordinal);
        foreach (var prop in root.EnumerateObject())
        {
            if (prop.NameEquals("metadata")) continue;
            Flatten(prop.Name, prop.Value, strings);
        }

        return new LocaleFile(code, name, strings);
    }

    private static void Flatten(string prefix, JsonElement el, IDictionary<string, string> into)
    {
        switch (el.ValueKind)
        {
            case JsonValueKind.Object:
                foreach (var p in el.EnumerateObject())
                    Flatten($"{prefix}.{p.Name}", p.Value, into);
                break;
            case JsonValueKind.String:
                into[prefix] = el.GetString() ?? "";
                break;
            default:
                into[prefix] = el.ToString();
                break;
        }
    }
}