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

#include <math.h>

#define FF_DISPLAY_NUM_FORMAT_ARGS 15

static int sortByNameAsc(FFDisplayResult* a, FFDisplayResult* b)
{
    return ffStrbufComp(&a->name, &b->name);
}

static int sortByNameDesc(FFDisplayResult* a, FFDisplayResult* b)
{
    return -ffStrbufComp(&a->name, &b->name);
}

void ffPrintDisplay(FFDisplayOptions* options)
{
    const FFDisplayServerResult* dsResult = ffConnectDisplayServer();

    if(dsResult->displays.length == 0)
    {
        ffPrintError(FF_DISPLAY_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Couldn't detect display");
        return;
    }

    if (options->order != FF_DISPLAY_ORDER_NONE)
    {
        ffListSort((FFlist*) &dsResult->displays, (void*) (options->order == FF_DISPLAY_ORDER_ASC ? sortByNameAsc : sortByNameDesc));
    }

    if (options->compactType != FF_DISPLAY_COMPACT_TYPE_NONE)
    {
        ffPrintLogoAndKey(FF_DISPLAY_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);

        FF_STRBUF_AUTO_DESTROY buffer = ffStrbufCreate();
        FF_LIST_FOR_EACH(FFDisplayResult, result, dsResult->displays)
        {
            if (options->compactType & FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT)
            {
                ffStrbufAppendF(&buffer, "%ix%i", result->width, result->height);
            }
            else
            {
                ffStrbufAppendF(&buffer, "%ix%i", result->scaledWidth, result->scaledHeight);
            }

            if (options->compactType & FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT)
            {
                if (result->refreshRate > 0)
                {
                    if (options->preciseRefreshRate)
                        ffStrbufAppendF(&buffer, " @ %gHz", result->refreshRate);
                    else
                        ffStrbufAppendF(&buffer, " @ %iHz", (uint32_t) (result->refreshRate + 0.5));
                }
                ffStrbufAppendS(&buffer, ", ");
            }
            else
            {
                ffStrbufAppendC(&buffer, ' ');
            }
        }
        ffStrbufTrimRight(&buffer, ' ');
        ffStrbufTrimRight(&buffer, ',');
        ffStrbufPutTo(&buffer, stdout);
        return;
    }

    FF_STRBUF_AUTO_DESTROY key = ffStrbufCreate();

    for(uint32_t i = 0; i < dsResult->displays.length; i++)
    {
        FFDisplayResult* result = ffListGet(&dsResult->displays, i);
        uint32_t moduleIndex = dsResult->displays.length == 1 ? 0 : i + 1;
        const char* displayType = result->type == FF_DISPLAY_TYPE_UNKNOWN ? NULL : result->type == FF_DISPLAY_TYPE_BUILTIN ? "built-in" : "external";

        ffStrbufClear(&key);
        if(options->moduleArgs.key.length == 0)
        {
            if (result->name.length)
                ffStrbufAppendF(&key, "%s (%s)", FF_DISPLAY_MODULE_NAME, result->name.chars);
            else if (moduleIndex > 0)
                ffStrbufAppendF(&key, "%s (%d)", FF_DISPLAY_MODULE_NAME, moduleIndex);
            else
                ffStrbufAppendS(&key, FF_DISPLAY_MODULE_NAME);
        }
        else
        {
            FF_PARSE_FORMAT_STRING_CHECKED(&key, &options->moduleArgs.key, 4, ((FFformatarg[]){
                FF_FORMAT_ARG(moduleIndex, "index"),
                FF_FORMAT_ARG(result->name, "name"),
                FF_FORMAT_ARG(displayType, "type"),
                FF_FORMAT_ARG(options->moduleArgs.keyIcon, "icon"),
            }));
        }

        FF_STRBUF_AUTO_DESTROY buffer = ffStrbufCreate();
        double inch = sqrt(result->physicalWidth * result->physicalWidth + result->physicalHeight * result->physicalHeight) / 25.4;

        if(options->moduleArgs.outputFormat.length == 0)
        {
            ffPrintLogoAndKey(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY);

            ffStrbufAppendF(&buffer, "%ix%i", result->width, result->height);

            if(result->refreshRate > 0)
            {
                if(options->preciseRefreshRate)
                    ffStrbufAppendF(&buffer, " @ %g Hz", ((int) (result->refreshRate * 1000 + 0.5)) / 1000.0);
                else
                    ffStrbufAppendF(&buffer, " @ %i Hz", (uint32_t) (result->refreshRate + 0.5));
            }

            if(
                result->scaledWidth > 0 && result->scaledWidth != result->width &&
                result->scaledHeight > 0 && result->scaledHeight != result->height)
                ffStrbufAppendF(&buffer, " (as %ix%i)", result->scaledWidth, result->scaledHeight);

            if (inch > 0)
                ffStrbufAppendF(&buffer, " in %i″", (uint32_t) (inch + 0.5));

            if(result->type != FF_DISPLAY_TYPE_UNKNOWN)
                ffStrbufAppendS(&buffer, result->type == FF_DISPLAY_TYPE_BUILTIN ? " [Built-in]" : " [External]");

            if (result->hdrEnabled)
                ffStrbufAppendS(&buffer, " [HDR]");

            if(moduleIndex > 0 && result->primary)
                ffStrbufAppendS(&buffer, " *");

            ffStrbufPutTo(&buffer, stdout);
            ffStrbufClear(&buffer);
        }
        else
        {
            double ppi = sqrt(result->width * result->width + result->height * result->height) / inch;

            char refreshRate[16];
            if(result->refreshRate > 0)
            {
                if(options->preciseRefreshRate)
                    snprintf(refreshRate, sizeof(refreshRate), "%g", ((int) (result->refreshRate * 1000 + 0.5)) / 1000.0);
                else
                    snprintf(refreshRate, sizeof(refreshRate), "%i", (uint32_t) (result->refreshRate + 0.5));
            }
            else
                refreshRate[0] = 0;

            FF_PRINT_FORMAT_CHECKED(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY, FF_DISPLAY_NUM_FORMAT_ARGS, ((FFformatarg[]) {
                FF_FORMAT_ARG(result->width, "width"),
                FF_FORMAT_ARG(result->height, "height"),
                FF_FORMAT_ARG(refreshRate, "refresh-rate"),
                FF_FORMAT_ARG(result->scaledWidth, "scaled-width"),
                FF_FORMAT_ARG(result->scaledHeight, "scaled-height"),
                FF_FORMAT_ARG(result->name, "name"),
                FF_FORMAT_ARG(displayType, "type"),
                FF_FORMAT_ARG(result->rotation, "rotation"),
                FF_FORMAT_ARG(result->primary, "is-primary"),
                FF_FORMAT_ARG(result->physicalWidth, "physical-width"),
                FF_FORMAT_ARG(result->physicalHeight, "physical-height"),
                FF_FORMAT_ARG(inch, "inch"),
                FF_FORMAT_ARG(ppi, "ppi"),
                FF_FORMAT_ARG(result->bitDepth, "bit-depth"),
                FF_FORMAT_ARG(result->hdrEnabled, "hdr-enabled"),
            }));
        }
    }
}

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

    if (ffStrEqualsIgnCase(subKey, "compact-type"))
    {
        options->compactType = (FFDisplayCompactType) ffOptionParseEnum(key, value, (FFKeyValuePair[]) {
            { "none", FF_DISPLAY_COMPACT_TYPE_NONE },
            { "original", FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT },
            { "scaled", FF_DISPLAY_COMPACT_TYPE_SCALED_BIT },
            { "original-with-refresh-rate", FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT },
            { "scaled-with-refresh-rate", FF_DISPLAY_COMPACT_TYPE_SCALED_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT },
            {},
        });
        return true;
    }

    if (ffStrEqualsIgnCase(subKey, "precise-refresh-rate"))
    {
        options->preciseRefreshRate = ffOptionParseBoolean(value);
        return true;
    }

    if (ffStrEqualsIgnCase(subKey, "order"))
    {
        options->order = (FFDisplayOrder) ffOptionParseEnum(key, value, (FFKeyValuePair[]) {
            { "asc", FF_DISPLAY_ORDER_ASC },
            { "desc", FF_DISPLAY_ORDER_DESC },
            { "none", FF_DISPLAY_ORDER_NONE },
            {},
        });
        return true;
    }

    return false;
}

void ffParseDisplayJsonObject(FFDisplayOptions* 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;

        if (ffStrEqualsIgnCase(key, "compactType"))
        {
            int value;
            const char* error = ffJsonConfigParseEnum(val, &value, (FFKeyValuePair[]) {
                { "none", FF_DISPLAY_COMPACT_TYPE_NONE },
                { "original", FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT },
                { "scaled", FF_DISPLAY_COMPACT_TYPE_SCALED_BIT },
                { "original-with-refresh-rate", FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT },
                { "scaled-with-refresh-rate", FF_DISPLAY_COMPACT_TYPE_SCALED_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT },
                {},
            });
            if (error)
                ffPrintError(FF_DISPLAY_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Invalid %s value: %s", key, error);
            else
                options->compactType = (FFDisplayCompactType) value;
            continue;
        }

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

        if (ffStrEqualsIgnCase(key, "order"))
        {
            int value;
            const char* error = ffJsonConfigParseEnum(val, &value, (FFKeyValuePair[]) {
                { "asc", FF_DISPLAY_ORDER_ASC },
                { "desc", FF_DISPLAY_ORDER_DESC },
                { "none", FF_DISPLAY_ORDER_NONE },
                {},
            });
            if (error)
                ffPrintError(FF_DISPLAY_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "Invalid %s value: %s", key, error);
            else
                options->order = (FFDisplayOrder) value;
            continue;
        }

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

void ffGenerateDisplayJsonConfig(FFDisplayOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
{
    __attribute__((__cleanup__(ffDestroyDisplayOptions))) FFDisplayOptions defaultOptions;
    ffInitDisplayOptions(&defaultOptions);

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

    if (options->compactType != defaultOptions.compactType)
    {
        switch ((int) options->compactType)
        {
            case FF_DISPLAY_COMPACT_TYPE_NONE:
                yyjson_mut_obj_add_str(doc, module, "compactType", "none");
                break;
            case FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT:
                yyjson_mut_obj_add_str(doc, module, "compactType", "original");
                break;
            case FF_DISPLAY_COMPACT_TYPE_SCALED_BIT:
                yyjson_mut_obj_add_str(doc, module, "compactType", "scaled");
                break;
            case FF_DISPLAY_COMPACT_TYPE_ORIGINAL_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT:
                yyjson_mut_obj_add_str(doc, module, "compactType", "original-with-refresh-rate");
                break;
            case FF_DISPLAY_COMPACT_TYPE_SCALED_BIT | FF_DISPLAY_COMPACT_TYPE_REFRESH_RATE_BIT:
                yyjson_mut_obj_add_str(doc, module, "compactType", "scaled-with-refresh-rate");
                break;
        }
    }

    if (options->preciseRefreshRate != defaultOptions.preciseRefreshRate)
        yyjson_mut_obj_add_bool(doc, module, "preciseRefreshRate", options->preciseRefreshRate);
}

void ffGenerateDisplayJsonResult(FF_MAYBE_UNUSED FFDisplayOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
{
    const FFDisplayServerResult* dsResult = ffConnectDisplayServer();

    if(dsResult->displays.length == 0)
    {
        yyjson_mut_obj_add_str(doc, module, "error", "Couldn't detect display");
        return;
    }

    yyjson_mut_val* arr = yyjson_mut_obj_add_arr(doc, module, "result");
    FF_LIST_FOR_EACH(FFDisplayResult, item, dsResult->displays)
    {
        yyjson_mut_val* obj = yyjson_mut_arr_add_obj(doc, arr);
        yyjson_mut_obj_add_uint(doc, obj, "id", item->id);
        yyjson_mut_obj_add_strbuf(doc, obj, "name", &item->name);
        yyjson_mut_obj_add_bool(doc, obj, "primary", item->primary);

        yyjson_mut_val* output = yyjson_mut_obj_add_obj(doc, obj, "output");
        yyjson_mut_obj_add_uint(doc, output, "width", item->width);
        yyjson_mut_obj_add_uint(doc, output, "height", item->height);

        yyjson_mut_val* scaled = yyjson_mut_obj_add_obj(doc, obj, "scaled");
        yyjson_mut_obj_add_uint(doc, scaled, "width", item->scaledWidth);
        yyjson_mut_obj_add_uint(doc, scaled, "height", item->scaledHeight);

        yyjson_mut_val* physical = yyjson_mut_obj_add_obj(doc, obj, "physical");
        yyjson_mut_obj_add_uint(doc, physical, "width", item->physicalWidth);
        yyjson_mut_obj_add_uint(doc, physical, "height", item->physicalHeight);

        yyjson_mut_obj_add_real(doc, obj, "refreshRate", item->refreshRate);
        yyjson_mut_obj_add_uint(doc, obj, "rotation", item->rotation);
        yyjson_mut_obj_add_uint(doc, obj, "bitDepth", item->bitDepth);
        yyjson_mut_obj_add_bool(doc, obj, "hdrEnabled", item->hdrEnabled);

        switch (item->type)
        {
            case FF_DISPLAY_TYPE_BUILTIN:
                yyjson_mut_obj_add_str(doc, obj, "type", "Builtin");
                break;
            case FF_DISPLAY_TYPE_EXTERNAL:
                yyjson_mut_obj_add_str(doc, obj, "type", "External");
                break;
            default:
                yyjson_mut_obj_add_str(doc, obj, "type", "Unknown");
                break;
        }
    }
}

void ffPrintDisplayHelpFormat(void)
{
    FF_PRINT_MODULE_FORMAT_HELP_CHECKED(FF_DISPLAY_MODULE_NAME, "{1}x{2} @ {3}Hz (as {4}x{5}) [{7}]", FF_DISPLAY_NUM_FORMAT_ARGS, ((const char* []) {
        "Screen width (in pixels) - width",
        "Screen height (in pixels) - height",
        "Screen refresh rate (in Hz) - refresh-rate",
        "Screen scaled width (in pixels) - scaled-width",
        "Screen scaled height (in pixels) - scaled-height",
        "Screen name - name",
        "Screen type (builtin, external or unknown) - type",
        "Screen rotation (in degrees) - rotation",
        "True if being the primary screen - is-primary",
        "Screen physical width (in millimeters) - physical-width",
        "Screen physical height (in millimeters) - physical-height",
        "Physical diagonal length in inches - inch",
        "Pixels per inch (PPI) - ppi",
        "Bits per color channel - bit-depth",
        "True if high dynamic range (HDR) is enabled - hdr-enabled",
    }));
}

void ffInitDisplayOptions(FFDisplayOptions* options)
{
    ffOptionInitModuleBaseInfo(
        &options->moduleInfo,
        FF_DISPLAY_MODULE_NAME,
        "Print resolutions, refresh rates, etc",
        ffParseDisplayCommandOptions,
        ffParseDisplayJsonObject,
        ffPrintDisplay,
        ffGenerateDisplayJsonResult,
        ffPrintDisplayHelpFormat,
        ffGenerateDisplayJsonConfig
    );
    ffOptionInitModuleArg(&options->moduleArgs, "󰍹");
    options->compactType = FF_DISPLAY_COMPACT_TYPE_NONE;
    options->preciseRefreshRate = false;
}

void ffDestroyDisplayOptions(FFDisplayOptions* options)
{
    ffOptionDestroyModuleArg(&options->moduleArgs);
}