#include <utility>

#include "regexis024_build_system.h"

std::vector<std::string> getFromPkgConfig(const std::string& req, const std::string& name){
    std::string pc_stdout, pc_stderr;
    CommandReturnCode rc = executeCommand_and_save_output({"pkg-config", "--" + req, name}, pc_stdout, pc_stderr);
    ASSERT(rc.isOk(), "failed to use pkg-config beacause of:\n" + pc_stderr);
    // todo: learn how pkg-config actually stores these options
    std::vector<std::string> result;
    for (char ch: pc_stdout) {
        if (result.empty())
            result.emplace_back();
        if (ch == ' ')
            result.emplace_back();
        else
            result.back() += ch;
    }
    return result;
}

ExternalLibraryTarget formExternalLibraryTargetWithNativeName(const std::string& name) {
    return {name, {getFromPkgConfig("cflags", name), getFromPkgConfig("libs", name)}};
}

struct CAWebChat {
    /* Building runlevel */
    BuildUnitsArray runlevel_1;
    /* Installation runlevel */
    BuildUnitsArray runlevel_2;

    std::string build_type;

    std::vector<std::string> warning_flags = {"-Wall", "-Wno-unused-variable", "-Werror=return-type","-pedantic",
        "-Wno-unused-but-set-variable", "-Wno-reorder"};
    std::vector<std::string> version_flags = {"--std", "c++14", "-D", "_POSIX_C_SOURCE=200809L"};
    std::vector<std::string> debug_defines_release = {"_GLIBCXX_DEBUG"};
    std::vector<std::string> debug_defines_debug = {"_GLIBCXX_DEBUG", "DEBUG_ALLOW_LOUD"};
    std::vector<std::string> opt_flags_release = {"-g", "-O2"};
    std::vector<std::string> opt_flags_debug = {"-g", "-ggdb", "-O0"};

    std::vector<std::string> getSomeRadFlags() const {
        std::vector<std::string> my_flag_collection;
        gxx_add_cli_options(my_flag_collection, warning_flags);
        gxx_add_cli_options(my_flag_collection, version_flags);
        if (build_type == "release") {
            gxx_add_cli_defines(my_flag_collection, debug_defines_release);
            gxx_add_cli_options(my_flag_collection, opt_flags_release);
        } else if (build_type == "debug") {
            gxx_add_cli_defines(my_flag_collection, debug_defines_debug);
            gxx_add_cli_options(my_flag_collection, opt_flags_debug);
        }
        return my_flag_collection;
    }

    CAWebChat(std::string  _build_type, const NormalCBuildSystemCommandMeaning& cmd)
        : build_type(std::move(_build_type))
    {
        ASSERT(build_type == "release" || build_type == "debug", "Unknown build type");

        std::vector<ExternalLibraryTarget> ext_targets = {
            formExternalLibraryTargetWithNativeName("libjsonincpp"),
            formExternalLibraryTargetWithNativeName("sqlite3"),
        };

        std::vector<CTarget> my_targets;

        { CTarget T("engine_engine_number_9", "shared_library");
            T.additional_compilation_flags = getSomeRadFlags();
            T.proj_deps = {};
            T.units = {
                "baza.cpp",
                "thread_synchronization.cpp",
                "os_utils.cpp",
                "http_structures/client_request_parse.cpp",
                "http_structures/response_gen.cpp",
                "connecting_assets/static_asset_manager.cpp",
                "running_mainloop.cpp",
            };
            for (std::string& u: T.units)
                u = "http_server/engine_engine_number_9/" + u;
            T.include_pr = "http_server";
            T.include_ir = "";
            T.exported_headers = {
                "baza.h",
                "baza_throw.h",
                "thread_synchronization.h",
                "os_utils.h",
                "connecting_assets/static_asset_manager.h",
                "http_structures/client_request.h",
                "http_structures/response_gen.h",
                "running_mainloop.h",
            };
            for (std::string& u: T.exported_headers)
                u = "engine_engine_number_9/" + u;

            T.installation_dir = "";
            my_targets.push_back(T);
        }
        { CTarget T("iu9-ca-web-chat", "executable");
            T.additional_compilation_flags = getSomeRadFlags();
            T.proj_deps = {CTargetDependenceOnProjectsLibrary("engine_engine_number_9")};
            T.units = {"main.cpp"};
            for (std::string& u: T.units)
                u = "web_chat/" + u;
            T.include_pr = "web_chat";
            T.installation_dir = "";
            my_targets.push_back(T);
        }
        regular_ctargets_to_2bus_conversion(ext_targets, my_targets, runlevel_1, runlevel_2,
            cmd.project_root, cmd.installation_root);
    }
};

int main(int argc, char** argv) {
    try {
        ASSERT_pl(argc > 0);
        assert(argc > 0);
        std::vector<std::string> args(argc - 1);
        for (int i = 0; i + 1 < argc; i++) {
            args[i] = argv[i + 1];
        }
        NormalCBuildSystemCommandMeaning cmd;
        regular_bs_cli_cmd_interpret(args, cmd);
        CAWebChat bs("debug", cmd);
        // std::string map = "Runlevel 1\n";
        // draw_bu_arr_in_dot(bs.runlevel_1, map);
        // map += "Runlevel 2\n";
        // draw_bu_arr_in_dot(bs.runlevel_2, map);
        // printf("%s", map.c_str());
        if (cmd.need_to_build)
            complete_tasks_of_build_units(bs.runlevel_1);
        umask(~0755);
        if (cmd.need_to_install)
            complete_tasks_of_build_units(bs.runlevel_2);
    } catch (const buildSystemFailure& e) {
        printf("Build system failure\n""%s\n", e.toString().c_str());
    }
}