// The CLI's Client against a real in-process daemon RPC server.

#include <sys/stat.h>
#include <unistd.h>

#include <cstdlib>
#include <string>
#include <thread>

#include "check.hpp"
#include "client.hpp"
#include "rpc/dispatcher.hpp"
#include "rpc/event_loop.hpp"
#include "rpc/event_hub.hpp"
#include "rpc/uds_server.hpp"
#include "store/migrations.hpp"
#include "store/settings.hpp"
#include "store/sqlite.hpp"

namespace rpc = velox::daemon::rpc;

static std::string g_allowed_root;
using velox::cli::CallError;
using velox::cli::Client;

void run() {
    // connect() with no daemon -> a kConnect error, not a crash.
    {
        ::setenv("XDG_RUNTIME_DIR", "/tmp/velox-cli-test-nonexistent-xyz", 1);
        Client c;
        auto err = c.connect();
        CHECK(err.has_value());
        if (err) CHECK_EQ(err->code, CallError::kConnect);
    }

    // Point XDG_RUNTIME_DIR at a fresh temp dir; the client derives
    // <XDG_RUNTIME_DIR>/velox/velox.sock and the server binds exactly that.
    char tmpl[] = "/tmp/velox-cli-test-XXXXXX";
    const char* xdg = ::mkdtemp(tmpl);
    CHECK(xdg != nullptr);
    if (xdg == nullptr) return;
    ::setenv("XDG_RUNTIME_DIR", xdg, 1);
    const std::string velox_dir = std::string(xdg) + "/velox";
    ::mkdir(velox_dir.c_str(), 0700);
    const std::string server_sock = velox_dir + "/velox.sock";

    rpc::EventLoop loop;
    auto db = velox::daemon::store::Db::open(":memory:");
    CHECK(db.has_value());
    if (!db) return;
    CHECK(velox::daemon::store::migrate_to_head(*db).has_value());

    char root_tmpl[] = "/tmp/velox-cli-root-XXXXXX";
    g_allowed_root = ::mkdtemp(root_tmpl);
    CHECK(!g_allowed_root.empty());
    {
        velox::daemon::store::Settings settings(*db);
        CHECK(settings.set_raw("saveTo.allowedRoots",
                               "[\"" + g_allowed_root + "\"]").has_value());
        CHECK(settings.set_raw("saveTo.defaultDir",
                               "\"" + g_allowed_root + "\"").has_value());
    }
    rpc::EventHub hub;
    rpc::VeloxDispatcher dispatcher(*db, hub);
    rpc::UdsServer server(loop, dispatcher, hub, server_sock);
    const auto ec = server.start();
    CHECK(!ec);
    if (ec) return;
    std::thread th([&loop] { loop.run(); });

    {
        Client c;
        auto err = c.connect();
        CHECK(!err.has_value());
        if (err) {
            loop.stop();
            th.join();
            return;
        }
        CHECK_EQ(c.hello_result().value("transport", ""), std::string("uds"));

        auto ls = c.call("download.list", nlohmann::json::object());
        CHECK(ls.has_value());
        if (ls) {
            CHECK_EQ(ls->value("total", -1), 0);
            CHECK(ls->at("items").is_array());
        }

        // download.add outside every allowed root -> -32011, original saveDir echoed.
        auto bad = c.call("download.add",
                          {{"url", "https://example.com/x"}, {"saveDir", "/etc"}});
        CHECK(!bad.has_value());
        if (!bad) {
            CHECK_EQ(bad.error().code, -32011);
            CHECK_EQ(bad.error().data.value("path", ""), std::string("/etc"));
        }

        // download.add into an allowed root -> a task id that then shows up in the list.
        auto ok = c.call(
            "download.add",
            {{"url", "https://example.com/movie.mp4"}, {"saveDir", g_allowed_root}});
        CHECK(ok.has_value());
        std::string task_id;
        if (ok) {
            task_id = ok->value("taskId", "");
            CHECK(!task_id.empty());
            CHECK_EQ(ok->value("state", ""), std::string("queued"));
        }

        auto ls2 = c.call("download.list", nlohmann::json::object());
        CHECK(ls2.has_value());
        if (ls2) {
            CHECK_EQ(ls2->value("total", -1), 1);
            CHECK_EQ(ls2->at("items").at(0).value("filename", ""), std::string("movie.mp4"));
        }

        auto detail = c.call("download.get", {{"taskId", task_id}});
        CHECK(detail.has_value());
        if (detail) CHECK_EQ(detail->at("summary").value("taskId", ""), task_id);

        auto missing =
            c.call("download.get", {{"taskId", "00000000-0000-4000-8000-000000000000"}});
        CHECK(!missing.has_value());
        if (!missing) CHECK_EQ(missing.error().code, -32010);
    }

    loop.stop();
    th.join();
    ::unlink(server_sock.c_str());
}

TEST_MAIN()