#pragma once
#include "db_test_util.hpp"
#include "server.hpp"
#include <gtest/gtest.h>
#include <httplib.h>
#include <chrono>
#include <memory>
#include <thread>
#include <vector>

namespace svapi::testutil {

class ApiFixture : public ::testing::Test {
protected:
    std::unique_ptr<DbGateway> db_;
    std::unique_ptr<CollectionRegistry> registry_;
    std::unique_ptr<SettingsStore> settings_;
    std::unique_ptr<KeyStore> keys_;
    std::unique_ptr<SessionStore> sessions_;
    std::unique_ptr<ApiServer> server_;
    std::thread serverThread_;
    int port_ = 0;
    std::string adminKey_;
    std::string project_;   // a project the admin owns; tests create collections under it

    httplib::Server mockOpenAi_;
    std::thread mockThread_;
    int mockPort_ = 0, mockDim_ = 4;
    std::string settingsColl_ = "svapitest_api_settings";
    std::string keysColl_     = "svapitest_api_keys";

    void SetUp() override {
        db_ = connectOrNull();
        if (!db_) GTEST_SKIP() << "smartbotic-database not reachable";
        project_ = tmpName("apiproj");
        db_->client().dropCollection(settingsColl_);
        db_->client().dropCollection(keysColl_);
        db_->dropProject(project_);
        // DB v2.3.1 Stage-F caveat: dropProject does not delete collection data.
        // Drop the project's registry collection explicitly so ensure() starts fresh.
        db_->client().dropCollection(qualify(project_, "vectorapi_collections"));
        db_->ensureProject(project_);

        registry_ = std::make_unique<CollectionRegistry>(*db_);
        registry_->ensure(project_);
        settings_ = std::make_unique<SettingsStore>(*db_, settingsColl_, "current");
        settings_->bootstrap("");
        keys_ = std::make_unique<KeyStore>(*db_, keysColl_);
        keys_->bootstrap("");
        adminKey_ = keys_->list().at(0).key;
        sessions_ = std::make_unique<SessionStore>(std::chrono::minutes(60));

        mockOpenAi_.Post("/v1/embeddings", [this](const httplib::Request&, httplib::Response& res) {
            nlohmann::json emb = nlohmann::json::array();
            for (int i = 0; i < mockDim_; ++i) emb.push_back(0.1f * (i + 1));
            res.set_content(nlohmann::json{{"data", {{{"embedding", emb}}}}}.dump(), "application/json");
        });
        mockPort_ = mockOpenAi_.bind_to_any_port("127.0.0.1");
        mockThread_ = std::thread([this]{ mockOpenAi_.listen_after_bind(); });
        Settings s = *settings_->snapshot();
        s.openaiApiBase = "http://127.0.0.1:" + std::to_string(mockPort_);
        s.openaiApiKey = "test";
        settings_->save(s);

        ServerDeps deps{*db_, *settings_, *keys_, *registry_, *sessions_, "", apiDocsDir()};
        server_ = std::make_unique<ApiServer>(std::move(deps));
        server_->registerRoutes();
        port_ = server_->bindToAnyPort("127.0.0.1");
        serverThread_ = std::thread([this]{ server_->listenAfterBind(); });
        httplib::Client probe("127.0.0.1", port_);
        for (int i = 0; i < 200; ++i) { if (probe.Get("/healthz")) break;
            std::this_thread::sleep_for(std::chrono::milliseconds(10)); }
    }
    void TearDown() override {
        if (server_) server_->stop();
        if (serverThread_.joinable()) serverThread_.join();
        mockOpenAi_.stop();
        if (mockThread_.joinable()) mockThread_.join();
        if (db_) { db_->client().dropCollection(settingsColl_);
                   db_->client().dropCollection(keysColl_);
                   db_->dropProject(project_); }
    }
    httplib::Client http(const std::string& bearer) {
        httplib::Client c("127.0.0.1", port_);
        c.set_default_headers({{"Authorization", "Bearer " + bearer}});
        return c;
    }
    httplib::Client admin() { return http(adminKey_); }
    httplib::Client noAuth() { return httplib::Client("127.0.0.1", port_); }
    static std::string apiDocsDir() { return SVAPI_API_DOCS_DIR; }
};
} // namespace svapi::testutil