#include "common/printing.h"
#include "common/jsonconfig.h"
#include "common/textModifier.h"
#include "common/color.h"
#include "common/strutil.h"
#include "logo/logo.h"
#include "modules/colors/colors.h"

static inline uint8_t min(uint8_t a, uint8_t b) {
    return a < b ? a : b;
}

static inline uint8_t max(uint8_t a, uint8_t b) {
    return a > b ? a : b;
}

bool ffPrintColors(FFColorsOptions* options) {
    bool flag = false;

    FF_STRBUF_AUTO_DESTROY result = ffStrbufCreateA(128);

    if (options->symbol == FF_COLORS_SYMBOL_BLOCK || options->symbol == FF_COLORS_SYMBOL_BACKGROUND) {
        if (options->brightness != FF_COLORS_BRIGHTNESS_LIGHT) {
            // 3%d: Set the foreground color
            for (uint8_t i = options->block.range[0]; i <= min(options->block.range[1], 7); i++) {
                if (options->symbol == FF_COLORS_SYMBOL_BLOCK) {
                    if (!instance.config.display.pipe) {
                        ffStrbufAppendF(&result, "\e[3%dm", i);
                    }
                    for (uint8_t j = 0; j < options->block.width; j++) {
                        ffStrbufAppendS(&result, "█");
                    }
                } else {
                    ffStrbufAppendF(&result, "\e[4%dm", i);
                    ffStrbufAppendNC(&result, options->block.width, ' ');
                }
            }
        }
        if (result.length > 0) {
            ffPrintLogoAndKey(FF_COLORS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
            flag = true;

            if (options->paddingLeft > 0) {
                ffPrintCharTimes(' ', options->paddingLeft);
            }

            if (!instance.config.display.pipe || options->symbol == FF_COLORS_SYMBOL_BACKGROUND) {
                ffStrbufAppendS(&result, FASTFETCH_TEXT_MODIFIER_RESET);
            }
            ffStrbufPutTo(&result, stdout);
            ffStrbufClear(&result);
        }

#ifdef __linux__
        // Required by Linux Console for light background to work
        if (options->symbol == FF_COLORS_SYMBOL_BACKGROUND) {
            const char* term = getenv("TERM");
            // Should be "linux", however some terminal mulitplexer overrides $TERM
            if (term && !ffStrStartsWith(term, "xterm")) {
                ffStrbufAppendS(&result, "\e[5m");
            }
        }
#endif

        if (options->brightness != FF_COLORS_BRIGHTNESS_NORMAL) {
            // 9%d: Set the foreground to the bright color
            for (uint8_t i = max(options->block.range[0], 8); i <= options->block.range[1]; i++) {
                if (options->symbol == FF_COLORS_SYMBOL_BLOCK) {
                    if (!instance.config.display.pipe) {
                        ffStrbufAppendF(&result, "\e[9%dm", i - 8);
                    }
                    for (uint8_t j = 0; j < options->block.width; j++) {
                        ffStrbufAppendS(&result, "█");
                    }
                } else {
                    ffStrbufAppendF(&result, "\e[10%dm", i - 8);
                    ffStrbufAppendNC(&result, options->block.width, ' ');
                }
            }
        }
    } else {
        const char* symbol;
        switch (options->symbol) {
            case FF_COLORS_SYMBOL_CIRCLE:
                symbol = "● ";
                break;
            case FF_COLORS_SYMBOL_DIAMOND:
                symbol = "◆ ";
                break;
            case FF_COLORS_SYMBOL_TRIANGLE:
                symbol = "▲ ";
                break;
            case FF_COLORS_SYMBOL_SQUARE:
                symbol = "■ ";
                break;
            case FF_COLORS_SYMBOL_STAR:
                symbol = "★ ";
                break;
            default:
                symbol = "███ ";
                break;
        }
        if (options->brightness == FF_COLORS_BRIGHTNESS_DEFAULT) {
            for (int i = 8; i >= 1; --i) {
                if (!instance.config.display.pipe) {
                    ffStrbufAppendF(&result, "\e[" FF_COLOR_FG_256 "%dm", i);
                }
                ffStrbufAppendS(&result, symbol);
            }
        } else {
            for (int i = 0; i <= 7; ++i) {
                if (!instance.config.display.pipe) {
                    ffStrbufAppendF(&result, "\e[%c%dm", options->brightness == FF_COLORS_BRIGHTNESS_NORMAL ? '3' : '9', i);
                }
                ffStrbufAppendS(&result, symbol);
            }
        }
        ffStrbufTrimRight(&result, ' ');
    }

    if (result.length > 0) {
        if (flag) {
            ffLogoPrintLine();
        } else {
            ffPrintLogoAndKey(FF_COLORS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
            flag = true;
        }

        if (options->paddingLeft > 0) {
            ffPrintCharTimes(' ', options->paddingLeft);
        }
        if (!instance.config.display.pipe || options->symbol == FF_COLORS_SYMBOL_BACKGROUND) {
            ffStrbufAppendS(&result, FASTFETCH_TEXT_MODIFIER_RESET);
        }
        ffStrbufPutTo(&result, stdout);
    }

    if (!flag) {
        ffPrintError(FF_COLORS_MODULE_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, "%s", "Nothing to print");
        return false;
    }

    return true;
}

void ffParseColorsJsonObject(FFColorsOptions* 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;
        }

        if (unsafe_yyjson_equals_str(key, "symbol")) {
            int value;
            const char* error = ffJsonConfigParseEnum(val, &value, (FFKeyValuePair[]) {
                                                                       { "block", FF_COLORS_SYMBOL_BLOCK },
                                                                       { "background", FF_COLORS_SYMBOL_BACKGROUND },
                                                                       { "circle", FF_COLORS_SYMBOL_CIRCLE },
                                                                       { "diamond", FF_COLORS_SYMBOL_DIAMOND },
                                                                       { "triangle", FF_COLORS_SYMBOL_TRIANGLE },
                                                                       { "square", FF_COLORS_SYMBOL_SQUARE },
                                                                       { "star", FF_COLORS_SYMBOL_STAR },
                                                                       {},
                                                                   });
            if (error) {
                ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s value: %s", unsafe_yyjson_get_str(key), error);
            } else {
                options->symbol = (FFColorsSymbol) value;
            }
            continue;
        }

        if (unsafe_yyjson_equals_str(key, "paddingLeft")) {
            options->paddingLeft = (uint32_t) yyjson_get_uint(val);
            continue;
        }

        if (unsafe_yyjson_equals_str(key, "block")) {
            if (!yyjson_is_obj(val)) {
                ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s value: must be an object", unsafe_yyjson_get_str(key));
            } else {
                yyjson_val* width = yyjson_obj_get(val, "width");
                if (width) {
                    options->block.width = (uint8_t) yyjson_get_uint(width);
                }

                yyjson_val* range = yyjson_obj_get(val, "range");
                if (range) {
                    if (!yyjson_is_arr(range) || yyjson_arr_size(range) != 2) {
                        ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s.range value: must be an array of 2 elements", unsafe_yyjson_get_str(key));
                    } else {
                        uint8_t start = (uint8_t) yyjson_get_uint(yyjson_arr_get(range, 0));
                        uint8_t end = (uint8_t) yyjson_get_uint(yyjson_arr_get(range, 1));
                        if (start > end) {
                            ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s.range value: range[0] > range[1]", unsafe_yyjson_get_str(key));
                        } else if (end > 15) {
                            ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s.range value: range[1] > 15", unsafe_yyjson_get_str(key));
                        } else {
                            options->block.range[0] = start;
                            options->block.range[1] = end;
                        }
                    }
                }
            }
            continue;
        }

        if (unsafe_yyjson_equals_str(key, "brightness")) {
            int value;
            const char* error = ffJsonConfigParseEnum(val, &value, (FFKeyValuePair[]) {
                                                                       { "default", FF_COLORS_BRIGHTNESS_DEFAULT },
                                                                       { "normal", FF_COLORS_BRIGHTNESS_NORMAL },
                                                                       { "light", FF_COLORS_BRIGHTNESS_LIGHT },
                                                                       {},
                                                                   });
            if (error) {
                ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Invalid %s value: %s", unsafe_yyjson_get_str(key), error);
            } else {
                options->brightness = (FFColorsBrightness) value;
            }
            continue;
        }

        ffPrintError(FF_COLORS_MODULE_NAME, 0, NULL, FF_PRINT_TYPE_NO_CUSTOM_KEY, "Unknown JSON key %s", unsafe_yyjson_get_str(key));
    }
}

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

    yyjson_mut_obj_remove_key(module, "format"); // Not supported

    switch (options->symbol) {
        case FF_COLORS_SYMBOL_CIRCLE:
            yyjson_mut_obj_add_str(doc, module, "symbol", "circle");
            break;
        case FF_COLORS_SYMBOL_DIAMOND:
            yyjson_mut_obj_add_str(doc, module, "symbol", "diamond");
            break;
        case FF_COLORS_SYMBOL_TRIANGLE:
            yyjson_mut_obj_add_str(doc, module, "symbol", "triangle");
            break;
        case FF_COLORS_SYMBOL_SQUARE:
            yyjson_mut_obj_add_str(doc, module, "symbol", "square");
            break;
        case FF_COLORS_SYMBOL_STAR:
            yyjson_mut_obj_add_str(doc, module, "symbol", "star");
            break;
        default:
            yyjson_mut_obj_add_str(doc, module, "symbol", "block");
            break;
    }

    yyjson_mut_obj_add_uint(doc, module, "paddingLeft", options->paddingLeft);

    {
        yyjson_mut_val* block = yyjson_mut_obj_add_obj(doc, module, "block");

        yyjson_mut_obj_add_uint(doc, block, "width", options->block.width);

        yyjson_mut_val* range = yyjson_mut_obj_add_arr(doc, block, "range");
        for (uint8_t i = 0; i < 2; i++) {
            yyjson_mut_arr_add_uint(doc, range, options->block.range[i]);
        }
    }

    switch (options->brightness) {
        case FF_COLORS_BRIGHTNESS_NORMAL:
            yyjson_mut_obj_add_str(doc, module, "brightness", "normal");
            break;
        case FF_COLORS_BRIGHTNESS_LIGHT:
            yyjson_mut_obj_add_str(doc, module, "brightness", "light");
            break;
        default:
            yyjson_mut_obj_add_str(doc, module, "brightness", "default");
            break;
    }
}

void ffInitColorsOptions(FFColorsOptions* options) {
    ffOptionInitModuleArg(&options->moduleArgs, "");
    ffStrbufSetStatic(&options->moduleArgs.key, " ");
    options->symbol = FF_COLORS_SYMBOL_BACKGROUND;
    options->paddingLeft = 0;
    options->block = (FFBlockConfig) {
        .width = 3,
        .range = { 0, 15 },
    };
    options->brightness = FF_COLORS_BRIGHTNESS_DEFAULT;
}

void ffDestroyColorsOptions(FFColorsOptions* options) {
    ffOptionDestroyModuleArg(&options->moduleArgs);
}

FFModuleBaseInfo ffColorsModuleInfo = {
    .name = FF_COLORS_MODULE_NAME,
    .description = "Display the terminal's 16-color palette",
    .initOptions = (void*) ffInitColorsOptions,
    .destroyOptions = (void*) ffDestroyColorsOptions,
    .parseJsonObject = (void*) ffParseColorsJsonObject,
    .printModule = (void*) ffPrintColors,
    .generateJsonConfig = (void*) ffGenerateColorsJsonConfig,
};