using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using NeonSprawl.Server.Game.Crafting;
using NeonSprawl.Server.Game.Encounters;
using NeonSprawl.Server.Game.Items;
using NeonSprawl.Server.Game.Skills;

namespace NeonSprawl.Server.Game.Quests;

/// <summary>DI registration for the fail-fast quest catalog and registry (NEO-113, NEO-114).</summary>
public static class QuestCatalogServiceCollectionExtensions
{
    /// <summary>Binds <see cref="ContentPathsOptions"/> and registers <see cref="QuestDefinitionCatalog"/> and <see cref="IQuestDefinitionRegistry"/> as singletons.</summary>
    public static IServiceCollection AddQuestDefinitionCatalog(this IServiceCollection services, IConfiguration configuration)
    {
        services.AddOptions<ContentPathsOptions>()
            .Bind(configuration.GetSection(ContentPathsOptions.SectionName));

        services.AddSingleton<QuestDefinitionCatalog>(sp =>
        {
            var hostEnv = sp.GetRequiredService<IHostEnvironment>();
            var opts = sp.GetRequiredService<IOptions<ContentPathsOptions>>().Value;
            var itemCatalog = sp.GetRequiredService<ItemDefinitionCatalog>();
            var recipeCatalog = sp.GetRequiredService<RecipeDefinitionCatalog>();
            var encounterCatalog = sp.GetRequiredService<EncounterDefinitionCatalog>();
            var logger = sp.GetRequiredService<ILoggerFactory>()
                .CreateLogger("NeonSprawl.Server.Game.Quests.QuestCatalog");

            var questsDir = QuestCatalogPathResolution.ResolveQuestsDirectory(
                opts.QuestsDirectory,
                hostEnv.ContentRootPath);
            var questDefSchemaPath = QuestCatalogPathResolution.ResolveQuestDefSchemaPath(
                questsDir,
                opts.QuestDefSchemaPath,
                hostEnv.ContentRootPath);
            var questStepDefSchemaPath = QuestCatalogPathResolution.ResolveQuestStepDefSchemaPath(
                questsDir,
                opts.QuestStepDefSchemaPath,
                hostEnv.ContentRootPath);
            var questObjectiveDefSchemaPath = QuestCatalogPathResolution.ResolveQuestObjectiveDefSchemaPath(
                questsDir,
                opts.QuestObjectiveDefSchemaPath,
                hostEnv.ContentRootPath);

            var knownItemIds = itemCatalog.ById.Keys.ToHashSet(StringComparer.Ordinal);
            var knownRecipeIds = recipeCatalog.ById.Keys.ToHashSet(StringComparer.Ordinal);
            var knownEncounterIds = encounterCatalog.ById.Keys.ToHashSet(StringComparer.Ordinal);

            return QuestDefinitionCatalogLoader.Load(
                questsDir,
                questDefSchemaPath,
                questStepDefSchemaPath,
                questObjectiveDefSchemaPath,
                knownItemIds,
                knownRecipeIds,
                knownEncounterIds,
                logger);
        });

        services.AddSingleton<IQuestDefinitionRegistry>(sp =>
            new QuestDefinitionRegistry(sp.GetRequiredService<QuestDefinitionCatalog>()));

        return services;
    }
}