#include "common/printing.h"
#include "common/jsonconfig.h"
#include "detection/initsystem/initsystem.h"
#include "modules/initsystem/initsystem.h"
#include "util/stringUtils.h"

#define FF_INITSYSTEM_NUM_FORMAT_ARGS 4
#define FF_INITSYSTEM_DISPLAY_NAME "Init System"

void ffPrintInitSystem(FFInitSystemOptions* options)
{
    FFInitSystemResult result = {
        .name = ffStrbufCreate(),
        .exe = ffStrbufCreate(),
        .version = ffStrbufCreate(),
        .pid = 1,
    };

    const char* error = ffDetectInitSystem(&result);

    if(error)
    {
        ffPrintError(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", error);
        goto exit;
    }

    if(options->moduleArgs.outputFormat.length == 0)
    {
        ffPrintLogoAndKey(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
        ffStrbufWriteTo(&result.name, stdout);
        if (result.version.length)
            printf(" %s\n", result.version.chars);
        else
            putchar('\n');
    }
    else
    {
        FF_PRINT_FORMAT_CHECKED(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, FF_INITSYSTEM_NUM_FORMAT_ARGS, ((FFformatarg[]) {
            {FF_FORMAT_ARG_TYPE_STRBUF, &result.name, "name"},
            {FF_FORMAT_ARG_TYPE_STRBUF, &result.exe, "exe"},
            {FF_FORMAT_ARG_TYPE_STRBUF, &result.version, "version"},
            {FF_FORMAT_ARG_TYPE_UINT, &result.pid, "pid"},
        }));
    }

exit:
    ffStrbufDestroy(&result.name);
    ffStrbufDestroy(&result.exe);
    ffStrbufDestroy(&result.version);
}

bool ffParseInitSystemCommandOptions(FFInitSystemOptions* options, const char* key, const char* value)
{
    const char* subKey = ffOptionTestPrefix(key, FF_INITSYSTEM_MODULE_NAME);
    if (!subKey) return false;
    if (ffOptionParseModuleArgs(key, subKey, value, &options->moduleArgs))
        return true;

    return false;
}

void ffParseInitSystemJsonObject(FFInitSystemOptions* options, yyjson_val* module)
{
    yyjson_val *key_, *val;
    size_t idx, max;
    yyjson_obj_foreach(module, idx, max, key_, val)
    {
        const char* key = yyjson_get_str(key_);
        if(ffStrEqualsIgnCase(key, "type"))
            continue;

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

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

void ffGenerateInitSystemJsonConfig(FFInitSystemOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
{
    __attribute__((__cleanup__(ffDestroyInitSystemOptions))) FFInitSystemOptions defaultOptions;
    ffInitInitSystemOptions(&defaultOptions);

    ffJsonConfigGenerateModuleArgsConfig(doc, module, &defaultOptions.moduleArgs, &options->moduleArgs);
}

void ffGenerateInitSystemJsonResult(FF_MAYBE_UNUSED FFInitSystemOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
{
    FFInitSystemResult result = {
        .name = ffStrbufCreate(),
        .exe = ffStrbufCreate(),
        .version = ffStrbufCreate(),
        .pid = 1,
    };

    const char* error = ffDetectInitSystem(&result);

    if (error)
    {
        yyjson_mut_obj_add_str(doc, module, "error", error);
        goto exit;
    }

    yyjson_mut_val* obj = yyjson_mut_obj_add_obj(doc, module, "result");
    yyjson_mut_obj_add_strbuf(doc, obj, "name", &result.name);
    yyjson_mut_obj_add_strbuf(doc, obj, "exe", &result.exe);
    yyjson_mut_obj_add_strbuf(doc, obj, "version", &result.version);
    yyjson_mut_obj_add_uint(doc, obj, "pid", result.pid);

exit:
    ffStrbufDestroy(&result.name);
    ffStrbufDestroy(&result.exe);
    ffStrbufDestroy(&result.version);
}

void ffPrintInitSystemHelpFormat(void)
{
    FF_PRINT_MODULE_FORMAT_HELP_CHECKED(FF_INITSYSTEM_DISPLAY_NAME, "{1}", FF_INITSYSTEM_NUM_FORMAT_ARGS, ((const char* []) {
        "init system name - name",
        "init system exe path - exe",
        "init system version path - version",
        "init system pid - pid",
    }));
}

void ffInitInitSystemOptions(FFInitSystemOptions* options)
{
    ffOptionInitModuleBaseInfo(
        &options->moduleInfo,
        FF_INITSYSTEM_MODULE_NAME,
        "Print init system (pid 1) name and version",
        ffParseInitSystemCommandOptions,
        ffParseInitSystemJsonObject,
        ffPrintInitSystem,
        ffGenerateInitSystemJsonResult,
        ffPrintInitSystemHelpFormat,
        ffGenerateInitSystemJsonConfig
    );
    ffOptionInitModuleArg(&options->moduleArgs, "󰿄");
}

void ffDestroyInitSystemOptions(FFInitSystemOptions* options)
{
    ffOptionDestroyModuleArg(&options->moduleArgs);
}
