'use strict';
const colorConvert = require('color-convert');

const wrapAnsi16 = (fn, offset) => function () {
    const code = fn.apply(colorConvert, arguments);
    return `\u001B[${code + offset}m`;
};

const wrapAnsi256 = (fn, offset) => function () {
    const code = fn.apply(colorConvert, arguments);
    return `\u001B[${38 + offset};5;${code}m`;
};

const wrapAnsi16m = (fn, offset) => function () {
    const rgb = fn.apply(colorConvert, arguments);
    return `\u001B[${38 + offset};2;${rgb[0]};${rgb[1]};${rgb[2]}m`;
};

function assembleStyles() {
    const codes = new Map();
    const styles = {
        modifier: {
            reset: [0, 0],
            // 21 isn't widely supported and 22 does the same thing
            bold: [1, 22],
            dim: [2, 22],
            italic: [3, 23],
            underline: [4, 24],
            inverse: [7, 27],
            hidden: [8, 28],
            strikethrough: [9, 29]
        },
        color: {
            black: [30, 39],
            red: [31, 39],
            green: [32, 39],
            yellow: [33, 39],
            blue: [34, 39],
            magenta: [35, 39],
            cyan: [36, 39],
            white: [37, 39],
            gray: [90, 39],

            // Bright color
            redBright: [91, 39],
            greenBright: [92, 39],
            yellowBright: [93, 39],
            blueBright: [94, 39],
            magentaBright: [95, 39],
            cyanBright: [96, 39],
            whiteBright: [97, 39]
        },
        bgColor: {
            bgBlack: [40, 49],
            bgRed: [41, 49],
            bgGreen: [42, 49],
            bgYellow: [43, 49],
            bgBlue: [44, 49],
            bgMagenta: [45, 49],
            bgCyan: [46, 49],
            bgWhite: [47, 49],

            // Bright color
            bgBlackBright: [100, 49],
            bgRedBright: [101, 49],
            bgGreenBright: [102, 49],
            bgYellowBright: [103, 49],
            bgBlueBright: [104, 49],
            bgMagentaBright: [105, 49],
            bgCyanBright: [106, 49],
            bgWhiteBright: [107, 49]
        }
    };

    // Fix humans
    styles.color.grey = styles.color.gray;

    for (const groupName of Object.keys(styles)) {
        const group = styles[groupName];

        for (const styleName of Object.keys(group)) {
            const style = group[styleName];

            styles[styleName] = {
                open: `\u001B[${style[0]}m`,
                close: `\u001B[${style[1]}m`
            };

            group[styleName] = styles[styleName];

            codes.set(style[0], style[1]);
        }

        Object.defineProperty(styles, groupName, {
            value: group,
            enumerable: false
        });

        Object.defineProperty(styles, 'codes', {
            value: codes,
            enumerable: false
        });
    }

    const ansi2ansi = n => n;
    const rgb2rgb = (r, g, b) => [r, g, b];

    styles.color.close = '\u001B[39m';
    styles.bgColor.close = '\u001B[49m';

    styles.color.ansi = {
        ansi: wrapAnsi16(ansi2ansi, 0)
    };
    styles.color.ansi256 = {
        ansi256: wrapAnsi256(ansi2ansi, 0)
    };
    styles.color.ansi16m = {
        rgb: wrapAnsi16m(rgb2rgb, 0)
    };

    styles.bgColor.ansi = {
        ansi: wrapAnsi16(ansi2ansi, 10)
    };
    styles.bgColor.ansi256 = {
        ansi256: wrapAnsi256(ansi2ansi, 10)
    };
    styles.bgColor.ansi16m = {
        rgb: wrapAnsi16m(rgb2rgb, 10)
    };

    for (let key of Object.keys(colorConvert)) {
        if (typeof colorConvert[key] !== 'object') {
            continue;
        }

        const suite = colorConvert[key];

        if (key === 'ansi16') {
            key = 'ansi';
        }

        if ('ansi16' in suite) {
            styles.color.ansi[key] = wrapAnsi16(suite.ansi16, 0);
            styles.bgColor.ansi[key] = wrapAnsi16(suite.ansi16, 10);
        }

        if ('ansi256' in suite) {
            styles.color.ansi256[key] = wrapAnsi256(suite.ansi256, 0);
            styles.bgColor.ansi256[key] = wrapAnsi256(suite.ansi256, 10);
        }

        if ('rgb' in suite) {
            styles.color.ansi16m[key] = wrapAnsi16m(suite.rgb, 0);
            styles.bgColor.ansi16m[key] = wrapAnsi16m(suite.rgb, 10);
        }
    }

    return styles;
}

// Make the export immutable
Object.defineProperty(module, 'exports', {
    enumerable: true,
    get: assembleStyles
});