namespace NeonSprawl.Server.Game.Quests;

/// <summary>Resolves quest catalog paths for local dev, tests, and container layouts (NEO-113).</summary>
public static class QuestCatalogPathResolution
{
    /// <summary>Walks <paramref name="startDirectory"/> and parents for an existing <c>content/quests</c> directory.</summary>
    public static string? TryDiscoverQuestsDirectory(string startDirectory)
    {
        for (var dir = new DirectoryInfo(startDirectory); dir is not null; dir = dir.Parent)
        {
            var candidate = Path.Combine(dir.FullName, "content", "quests");
            if (Directory.Exists(candidate))
                return Path.GetFullPath(candidate);
        }

        return null;
    }

    /// <summary>
    /// Resolves the quests catalog directory.
    /// Empty <paramref name="configuredQuestsDirectory"/> triggers discovery from <see cref="AppContext.BaseDirectory"/>.
    /// </summary>
    public static string ResolveQuestsDirectory(string? configuredQuestsDirectory, string contentRootPath)
    {
        if (string.IsNullOrWhiteSpace(configuredQuestsDirectory))
        {
            var discovered = TryDiscoverQuestsDirectory(AppContext.BaseDirectory);
            if (discovered is not null)
                return discovered;

            throw new InvalidOperationException(
                "Content:QuestsDirectory is not set and auto-discovery failed (no ancestor of AppContext.BaseDirectory contains 'content/quests'). " +
                "Set Content:QuestsDirectory in configuration or environment (e.g. Content__QuestsDirectory).");
        }

        var trimmed = configuredQuestsDirectory.Trim();
        if (Path.IsPathRooted(trimmed))
            return Path.GetFullPath(trimmed);

        return Path.GetFullPath(Path.Combine(contentRootPath, trimmed));
    }

    /// <summary>Resolves JSON Schema path for a single quest row (Draft 2020-12).</summary>
    public static string ResolveQuestDefSchemaPath(
        string questsDirectory,
        string? configuredSchemaPath,
        string contentRootPath)
    {
        if (!string.IsNullOrWhiteSpace(configuredSchemaPath))
        {
            var trimmed = configuredSchemaPath.Trim();
            if (Path.IsPathRooted(trimmed))
                return Path.GetFullPath(trimmed);

            return Path.GetFullPath(Path.Combine(contentRootPath, trimmed));
        }

        return Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "quest-def.schema.json"));
    }

    /// <summary>Resolves JSON Schema path for a quest step row.</summary>
    public static string ResolveQuestStepDefSchemaPath(
        string questsDirectory,
        string? configuredSchemaPath,
        string contentRootPath)
    {
        if (!string.IsNullOrWhiteSpace(configuredSchemaPath))
        {
            var trimmed = configuredSchemaPath.Trim();
            if (Path.IsPathRooted(trimmed))
                return Path.GetFullPath(trimmed);

            return Path.GetFullPath(Path.Combine(contentRootPath, trimmed));
        }

        return Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "quest-step-def.schema.json"));
    }

    /// <summary>Resolves JSON Schema path for a quest objective row.</summary>
    public static string ResolveQuestObjectiveDefSchemaPath(
        string questsDirectory,
        string? configuredSchemaPath,
        string contentRootPath)
    {
        if (!string.IsNullOrWhiteSpace(configuredSchemaPath))
        {
            var trimmed = configuredSchemaPath.Trim();
            if (Path.IsPathRooted(trimmed))
                return Path.GetFullPath(trimmed);

            return Path.GetFullPath(Path.Combine(contentRootPath, trimmed));
        }

        return Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "quest-objective-def.schema.json"));
    }

    /// <summary>Resolves JSON Schema path for a reward grant row (shared by reward tables and quest bundles).</summary>
    public static string ResolveRewardGrantRowSchemaPath(string questsDirectory) =>
        Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "reward-grant-row.schema.json"));

    /// <summary>Resolves JSON Schema path for a quest skill XP grant row.</summary>
    public static string ResolveQuestSkillXpGrantSchemaPath(string questsDirectory) =>
        Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "quest-skill-xp-grant.schema.json"));

    /// <summary>Resolves JSON Schema path for a quest completion reward bundle.</summary>
    public static string ResolveQuestRewardBundleSchemaPath(string questsDirectory) =>
        Path.GetFullPath(Path.Combine(questsDirectory, "..", "schemas", "quest-reward-bundle.schema.json"));
}