#include "common/printing.h"
#include "common/jsonconfig.h"
#include "common/option.h"
#include "common/strutil.h"
#include "detection/os/os.h"
#include "modules/os/os.h"

#include <ctype.h>

static void buildOutputDefault(const FFOSResult* os, FFstrbuf* result) {
    // Create the basic output
    if (os->name.length > 0) {
        ffStrbufAppend(result, &os->name);
    } else if (os->prettyName.length > 0) {
        ffStrbufAppend(result, &os->prettyName);
    } else if (os->id.length > 0) {
        ffStrbufAppend(result, &os->id);
    } else {
        ffStrbufAppend(result, &instance.state.platform.sysinfo.name);
    }

    // Append code name if it is missing
    if (os->codename.length > 0 && !ffStrbufContainIgnCase(result, &os->codename)) {
        ffStrbufAppendC(result, ' ');
        ffStrbufAppend(result, &os->codename);
    }

    // Append version if it is missing
    if (os->versionID.length > 0 && !ffStrbufContainIgnCase(result, &os->versionID)) {
        ffStrbufAppendC(result, ' ');
        ffStrbufAppend(result, &os->versionID);
    } else if (os->versionID.length == 0 && os->version.length > 0 && !ffStrbufContainIgnCase(result, &os->version)) {
        ffStrbufAppendC(result, ' ');
        ffStrbufAppend(result, &os->version);
    }

    // Append variant if it is missing
    if (os->variant.length > 0 && !ffStrbufContainIgnCase(result, &os->variant)) {
        ffStrbufAppendS(result, " (");
        ffStrbufAppend(result, &os->variant);
        ffStrbufAppendC(result, ')');
    } else if (os->variant.length == 0 && os->variantID.length > 0 && !ffStrbufContainIgnCase(result, &os->variantID)) {
        ffStrbufAppendS(result, " (");
        ffStrbufAppend(result, &os->variantID);
        ffStrbufAppendC(result, ')');
    }
}

bool ffPrintOS(FFOSOptions* options) {
    const FFOSResult* os = ffDetectOS();

    if (os->name.length == 0 && os->prettyName.length == 0 && os->id.length == 0) {
        ffPrintError(FF_OS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Could not detect OS");
        return false;
    }

    FF_STRBUF_AUTO_DESTROY key = ffStrbufCreate();

    if (options->moduleArgs.key.length == 0) {
        ffStrbufSetStatic(&key, FF_OS_MODULE_NAME);
    } else {
        FF_PARSE_FORMAT_STRING_CHECKED(&key, &options->moduleArgs.key, ((FFformatarg[]) {
                                                                           FF_ARG(instance.state.platform.sysinfo.name, "sysname"),
                                                                           FF_ARG(os->name, "name"),
                                                                           FF_ARG(options->moduleArgs.keyIcon, "icon"),
                                                                       }));
    }

    if (options->moduleArgs.outputFormat.length == 0) {
        FF_STRBUF_AUTO_DESTROY result = ffStrbufCreate();

        if (os->prettyName.length > 0) {
            ffStrbufAppend(&result, &os->prettyName);
        } else {
            buildOutputDefault(os, &result);
        }

        // Append architecture if it is missing
        if (!ffStrbufContainIgnCase(&result, &instance.state.platform.sysinfo.architecture)) {
            ffStrbufAppendC(&result, ' ');
            ffStrbufAppend(&result, &instance.state.platform.sysinfo.architecture);
        }

        ffPrintLogoAndKey(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY);
        ffStrbufPutTo(&result, stdout);
    } else {
        FF_PRINT_FORMAT_CHECKED(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY, ((FFformatarg[]) {
                                                                                                     FF_ARG(instance.state.platform.sysinfo.name, "sysname"),
                                                                                                     FF_ARG(os->name, "name"),
                                                                                                     FF_ARG(os->prettyName, "pretty-name"),
                                                                                                     FF_ARG(os->id, "id"),
                                                                                                     FF_ARG(os->idLike, "id-like"),
                                                                                                     FF_ARG(os->variant, "variant"),
                                                                                                     FF_ARG(os->variantID, "variant-id"),
                                                                                                     FF_ARG(os->version, "version"),
                                                                                                     FF_ARG(os->versionID, "version-id"),
                                                                                                     FF_ARG(os->codename, "codename"),
                                                                                                     FF_ARG(os->buildID, "build-id"),
                                                                                                     FF_ARG(instance.state.platform.sysinfo.architecture, "arch"),
                                                                                                     FF_ARG(instance.state.platform.sysinfo.release, "kernel-release"),
                                                                                                 }));
    }

    return true;
}

void ffParseOSJsonObject(FFOSOptions* options, yyjson_val* module) {
    yyjson_val *key, *val;
    size_t idx, max;
    yyjson_obj_foreach (module, idx, max, key, val) {
        if (ffJsonConfigParseModuleArgs(key, val, &options->moduleArgs)) {
            continue;
        }

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

void ffGenerateOSJsonConfig(FFOSOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
    ffJsonConfigGenerateModuleArgsConfig(doc, module, &options->moduleArgs);
}

bool ffGenerateOSJsonResult(FF_A_UNUSED FFOSOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module) {
    const FFOSResult* os = ffDetectOS();

    if (os->name.length == 0 && os->prettyName.length == 0 && os->id.length == 0) {
        yyjson_mut_obj_add_str(doc, module, "error", "Could not detect OS");
        return false;
    }

    yyjson_mut_val* obj = yyjson_mut_obj_add_obj(doc, module, "result");
    yyjson_mut_obj_add_strbuf(doc, obj, "buildID", &os->buildID);
    yyjson_mut_obj_add_strbuf(doc, obj, "codename", &os->codename);
    yyjson_mut_obj_add_strbuf(doc, obj, "id", &os->id);
    yyjson_mut_obj_add_strbuf(doc, obj, "idLike", &os->idLike);
    yyjson_mut_obj_add_strbuf(doc, obj, "name", &os->name);
    yyjson_mut_obj_add_strbuf(doc, obj, "prettyName", &os->prettyName);
    yyjson_mut_obj_add_strbuf(doc, obj, "variant", &os->variant);
    yyjson_mut_obj_add_strbuf(doc, obj, "variantID", &os->variantID);
    yyjson_mut_obj_add_strbuf(doc, obj, "version", &os->version);
    yyjson_mut_obj_add_strbuf(doc, obj, "versionID", &os->versionID);

    return true;
}

void ffInitOSOptions(FFOSOptions* options) {
    ffOptionInitModuleArg(&options->moduleArgs,
#ifdef _WIN32
        ""
#elif __APPLE__
        ""
#elif __FreeBSD__
        "󰣠"
#elif __ANDROID__
        ""
#elif __linux__
        ""
#elif __sun
        ""
#elif __OpenBSD__
        ""
#elif __Haiku__
        ""
#else
        "󰢻"
#endif
    );
}

void ffDestroyOSOptions(FFOSOptions* options) {
    ffOptionDestroyModuleArg(&options->moduleArgs);
}

FFModuleBaseInfo ffOSModuleInfo = {
    .name = FF_OS_MODULE_NAME,
    .description = "Print the OS or Linux distribution name and version",
    .initOptions = (void*) ffInitOSOptions,
    .destroyOptions = (void*) ffDestroyOSOptions,
    .parseJsonObject = (void*) ffParseOSJsonObject,
    .printModule = (void*) ffPrintOS,
    .generateJsonResult = (void*) ffGenerateOSJsonResult,
    .generateJsonConfig = (void*) ffGenerateOSJsonConfig,
    .formatArgs = FF_FORMAT_ARG_LIST(((FFModuleFormatArg[]) {
        { "Name of the kernel", "sysname" },
        { "Name of the OS", "name" },
        { "Pretty name of the OS, if available", "pretty-name" },
        { "ID of the OS", "id" },
        { "ID like of the OS", "id-like" },
        { "Variant of the OS", "variant" },
        { "Variant ID of the OS", "variant-id" },
        { "Version of the OS", "version" },
        { "Version ID of the OS", "version-id" },
        { "Version codename of the OS", "codename" },
        { "Build ID of the OS", "build-id" },
        { "Architecture of the OS", "arch" },
    }))
};