#include "common/printing.h"
#include "common/jsonconfig.h"
#include "common/time.h"
#include "common/strutil.h"
#include "detection/users/users.h"
#include "modules/users/users.h"

#pragma GCC diagnostic ignored "-Wformat" // warning: unknown conversion type character 'F' in format

bool ffPrintUsers(FFUsersOptions* options) {
    FF_LIST_AUTO_DESTROY users = ffListCreate();

    const char* error = ffDetectUsers(options, &users);

    if (error) {
        ffPrintError(FF_USERS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", error);
        return false;
    }

    if (users.length == 0) {
        ffPrintError(FF_USERS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", "Unable to detect any users");
        return false;
    }

    if (options->moduleArgs.outputFormat.length == 0) {
        if (options->compact) {
            ffPrintLogoAndKey(FF_USERS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);

            FF_STRBUF_AUTO_DESTROY result = ffStrbufCreate();
            for (uint32_t i = 0; i < users.length; ++i) {
                if (i > 0) {
                    ffStrbufAppendS(&result, ", ");
                }
                FFUserResult* user = FF_LIST_GET(FFUserResult, users, i);
                ffStrbufAppend(&result, &user->name);
            }
            ffStrbufPutTo(&result, stdout);
        } else {
            for (uint32_t i = 0; i < users.length; ++i) {
                FFUserResult* user = FF_LIST_GET(FFUserResult, users, i);

                ffPrintLogoAndKey(FF_USERS_MODULE_NAME, users.length == 1 ? 0 : (uint8_t) (i + 1), &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);

                FF_STRBUF_AUTO_DESTROY result = ffStrbufCreateCopy(&user->name);
                if (user->hostName.length) {
                    ffStrbufAppendF(&result, "@%s", user->hostName.chars);
                }

                if (user->loginTime) {
                    ffStrbufAppendF(&result, " - login time %s", ffTimeToShortStr(user->loginTime));
                }

                ffStrbufPutTo(&result, stdout);
            }
        }
    } else {
        uint64_t now = ffTimeGetNow();
        for (uint32_t i = 0; i < users.length; ++i) {
            FFUserResult* user = FF_LIST_GET(FFUserResult, users, i);

            uint64_t duration = now - user->loginTime;
            uint32_t milliseconds = (uint32_t) (duration % 1000);
            duration /= 1000;
            uint32_t seconds = (uint32_t) (duration % 60);
            duration /= 60;
            uint32_t minutes = (uint32_t) (duration % 60);
            duration /= 60;
            uint32_t hours = (uint32_t) (duration % 24);
            duration /= 24;
            uint32_t days = (uint32_t) duration;

            FFTimeGetAgeResult age = ffTimeGetAge(user->loginTime, ffTimeGetNow());

            FF_PRINT_FORMAT_CHECKED(FF_USERS_MODULE_NAME, users.length == 1 ? 0 : (uint8_t) (i + 1), &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, ((FFformatarg[]) {
                                                                                                                                                      FF_ARG(user->name, "name"),
                                                                                                                                                      FF_ARG(user->hostName, "host-name"),
                                                                                                                                                      FF_ARG(user->sessionName, "session-name"),
                                                                                                                                                      FF_ARG(user->clientIp, "client-ip"),
                                                                                                                                                      { FF_ARG_TYPE_STRING, ffTimeToShortStr(user->loginTime), "login-time" },
                                                                                                                                                      FF_ARG(days, "days"),
                                                                                                                                                      FF_ARG(hours, "hours"),
                                                                                                                                                      FF_ARG(minutes, "minutes"),
                                                                                                                                                      FF_ARG(seconds, "seconds"),
                                                                                                                                                      FF_ARG(milliseconds, "milliseconds"),
                                                                                                                                                      FF_ARG(age.years, "years"),
                                                                                                                                                      FF_ARG(age.daysOfYear, "days-of-year"),
                                                                                                                                                      FF_ARG(age.yearsFraction, "years-fraction"),
                                                                                                                                                  }));
        }
    }

    FF_LIST_FOR_EACH (FFUserResult, user, users) {
        ffStrbufDestroy(&user->clientIp);
        ffStrbufDestroy(&user->hostName);
        ffStrbufDestroy(&user->sessionName);
        ffStrbufDestroy(&user->name);
    }

    return true;
}

void ffParseUsersJsonObject(FFUsersOptions* options, yyjson_val* module) {
    yyjson_val *key, *val;
    size_t idx, max;
    yyjson_obj_foreach (module, idx, max, key, val) {
        if (unsafe_yyjson_equals_str(key, "type") || unsafe_yyjson_equals_str(key, "condition")) {
            continue;
        }

        if (ffJsonConfigParseModuleArgs(key, val, &options->moduleArgs)) {
            continue;
        }

        if (unsafe_yyjson_equals_str(key, "compact")) {
            options->compact = yyjson_get_bool(val);
            continue;
        }

        if (unsafe_yyjson_equals_str(key, "myselfOnly")) {
            options->myselfOnly = yyjson_get_bool(val);
            continue;
        }

        ffPrintError(FF_USERS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Unknown JSON key %s", unsafe_yyjson_get_str(key));
    }
}

void ffGenerateUsersJsonConfig(FFUsersOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
    ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);

    yyjson_mut_obj_add_bool(doc, module, "compact", options->compact);

    yyjson_mut_obj_add_bool(doc, module, "myselfOnly", options->myselfOnly);
}

bool ffGenerateUsersJsonResult(FFUsersOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
    FF_LIST_AUTO_DESTROY results = ffListCreate();

    const char* error = ffDetectUsers(options, &results);

    if (error) {
        yyjson_mut_obj_add_str(doc, module, "error", error);
        return false;
    }

    yyjson_mut_val* arr = yyjson_mut_obj_add_arr(doc, module, "result");
    FF_LIST_FOR_EACH (FFUserResult, user, results) {
        yyjson_mut_val* obj = yyjson_mut_arr_add_obj(doc, arr);
        yyjson_mut_obj_add_strbuf(doc, obj, "name", &user->name);
        yyjson_mut_obj_add_strbuf(doc, obj, "hostName", &user->hostName);
        yyjson_mut_obj_add_strbuf(doc, obj, "sessionName", &user->sessionName);
        yyjson_mut_obj_add_strbuf(doc, obj, "clientIp", &user->clientIp);
        const char* pstr = ffTimeToFullStr(user->loginTime);
        if (*pstr) {
            yyjson_mut_obj_add_strcpy(doc, obj, "loginTime", pstr);
        } else {
            yyjson_mut_obj_add_null(doc, obj, "loginTime");
        }
    }

    FF_LIST_FOR_EACH (FFUserResult, user, results) {
        ffStrbufDestroy(&user->clientIp);
        ffStrbufDestroy(&user->hostName);
        ffStrbufDestroy(&user->sessionName);
        ffStrbufDestroy(&user->name);
    }

    return true;
}

void ffInitUsersOptions(FFUsersOptions* options) {
    ffOptionInitModuleArg(&options->moduleArgs, "");

    options->compact = false;
    options->myselfOnly = false;
}

void ffDestroyUsersOptions(FFUsersOptions* options) {
    ffOptionDestroyModuleArg(&options->moduleArgs);
}

FFModuleBaseInfo ffUsersModuleInfo = {
    .name = FF_USERS_MODULE_NAME,
    .description = "Print users who are currently logged in",
    .initOptions = (void*) ffInitUsersOptions,
    .destroyOptions = (void*) ffDestroyUsersOptions,
    .parseJsonObject = (void*) ffParseUsersJsonObject,
    .printModule = (void*) ffPrintUsers,
    .generateJsonResult = (void*) ffGenerateUsersJsonResult,
    .generateJsonConfig = (void*) ffGenerateUsersJsonConfig,
    .formatArgs = FF_FORMAT_ARG_LIST(((FFModuleFormatArg[]) {
        { "User name", "name" },
        { "Host name", "host-name" },
        { "Session name", "session-name" },
        { "Client IP", "client-ip" },
        { "Login Time in local timezone", "login-time" },
        { "Days after login", "days" },
        { "Hours after login", "hours" },
        { "Minutes after login", "minutes" },
        { "Seconds after login", "seconds" },
        { "Milliseconds after login", "milliseconds" },
        { "Years integer after login", "years" },
        { "Days of year after login", "days-of-year" },
        { "Years fraction after login", "years-fraction" },
    }))
};
