/**
 * 工程中根据res/icon/svg/*.svg
 * 自动生成字体图标-cqh
 */

let gulp = require('gulp');
let iconfont = require('gulp-iconfont');
let consolidate = require('gulp-consolidate');
let rename = require('gulp-rename');
let rev = require('gulp-rev');
let path = require('path');
let fileUtil = require('../util/fileUtil');

module.exports = {
    async compileSvg2Icon (repoPath, iconPrefix, fontPath = '../fonts/') {
        let svgPath = path.join(repoPath, './svg/*.svg');
        let templatePath = path.join(__dirname, './iconTemplate/');
        // 先清除文件夹，防止缓存
        await fileUtil.deleteDirector(path.join(repoPath, './css'));
        await fileUtil.deleteDirector(path.join(repoPath, './fonts'));

        await this.compileIcon(iconPrefix, fontPath, svgPath, templatePath, repoPath);
    },
    compileIcon (iconPrefix, fontPath, svgPath, templatePath, repoPath) {
        return new Promise((resolve, reject) => {
            gulp.src([svgPath])
                .pipe(iconfont({
                    fontName: iconPrefix,
                    // prependUnicode: true,
                    // startUnicode: 0xE001,
                    formats: ['svg', 'ttf', 'eot', 'woff'],
                    normalize: true,
                    centerHorizontally: true,
                    fontHeight: 1024 // must need for perfect icon
                }))
                .on('error', function (e) {
                    reject(e);
                    throw new Error(e);
                })
                .on('glyphs', function (glyphs, options) {
                    glyphs.forEach(function (glyph, idx, arr) {
                        arr[idx].codePoint = glyph.unicode[0].charCodeAt(0).toString(16).toUpperCase()
                    });
                    gulp.src(path.join(templatePath, './iconTemplate.css'))
                        .pipe(consolidate('lodash', {
                            glyphs: glyphs,
                            fontName: iconPrefix,
                            fontPath: '../fonts/',
                            cssClass: iconPrefix
                        }))
                    // css 给demo文件用
                        .pipe(rename('icons.css'))
                        .pipe(rev())
                        .pipe(gulp.dest(path.join(repoPath, './css/')))
                        .on('finish', function () {
                            console.log('css file generation over!');
                        })
                })
                .pipe(rev())
                .pipe(gulp.dest(path.join(repoPath, './fonts/')))
                .on('finish', function () {
                    console.log('font generation over');
                    resolve();
                });
        })
    }
};