#include "collection_registry.hpp"
#include <ctime>

namespace svapi {

CollectionMeta CollectionMeta::fromJson(const nlohmann::json& j) {
    CollectionMeta m;
    m.name            = j.value("name", "");
    m.kind            = j.value("kind", "json");
    m.vectorDimension = j.value("vector_dimension", 0u);
    m.embeddingModel  = j.value("embedding_model", "");
    m.createdAt       = j.value("created_at", 0ull);
    return m;
}

nlohmann::json CollectionMeta::toJson() const {
    return {{"name", name}, {"kind", kind}, {"vector_dimension", vectorDimension},
            {"embedding_model", embeddingModel}, {"created_at", createdAt}};
}

CollectionRegistry::CollectionRegistry(DbGateway& db) : db_(db) {}

void CollectionRegistry::ensure(const std::string& project) {
    const std::string c = coll(project);
    if (!db_.client().getCollectionInfo(c).has_value())
        db_.client().createCollection(c, 0, false, 0, 0);
}

void CollectionRegistry::bootstrap(const std::vector<std::string>& projects) {
    for (const auto& p : projects) ensure(p);
}

bool CollectionRegistry::add(const std::string& project, const CollectionMeta& meta) {
    CollectionMeta m = meta;
    if (m.createdAt == 0) m.createdAt = static_cast<uint64_t>(std::time(nullptr));
    auto [id, isNew] = db_.client().upsert(coll(project), m.toJson(), m.name);
    return !id.empty();
}

std::optional<CollectionMeta> CollectionRegistry::get(const std::string& project,
                                                       const std::string& name) {
    if (auto doc = db_.client().get(coll(project), name))
        return CollectionMeta::fromJson(*doc);
    return std::nullopt;
}

std::vector<CollectionMeta> CollectionRegistry::list(const std::string& project) {
    std::vector<CollectionMeta> out;
    smartbotic::database::Client::QueryOptions opts;
    opts.limit = 100000;
    for (const auto& doc : db_.client().find(coll(project), opts))
        out.push_back(CollectionMeta::fromJson(doc));
    return out;
}

bool CollectionRegistry::remove(const std::string& project, const std::string& name) {
    return db_.client().remove(coll(project), name);
}

} // namespace svapi