import {Marked} from 'marked';
import hljs from 'highlight.js';
import markedFootnote from 'marked-footnote'
import markedCodeFormat from 'marked-code-format'
import { markedEmoji } from 'marked-emoji';

postMessage({
    type: 'init',
    data: 'Hello World!'
})


// 默认编辑器配置
const defaoltMarkOption = {
    async: true, // 同步编译
    pedantic: false,
    gfm: true,
    silent: true, // 输出错误
    breaks: false, // 将回车编程<br/>
}

// 自定义行号注入函数
const injectLineNumbers = (highlightedCode) => {
    const lines = highlightedCode.split('\n')

    // 移除最后一行空行（常见于代码块末尾的换行）
    if (lines[lines.length - 1] === '') lines.pop()

    // 为每行添加行号容器
    return lines.map((line, index) => `<div class="code-line"><span class="line-number">${index + 1}</span><span class="line-content">${line}</span></div>`).join('')
}

// 编辑器render配置
const editorRenderOption = {
    space: (...args) => {
        console.log(args, 'space')
        return `<div>space</div>`
    },
    code: (...args) => {
        console.log(args, 'code')
        return `<div>xscode</div>`
    },
    blockquote: (...args) => {
        console.log(args, 'blockquote')
        return `<div>blockquote</div>`
    },
    html: (...args) => {
        console.log(args, 'html')
        return `<div>html</div>`
    },
    heading: (...args) => {
        console.log(args[0], 'heading')
        return `<h${args[0].depth}>${args[0].raw}</h${args[0].depth}>`
    },
    hr: (...args) => {
        console.log(args, 'hr')
        return `<div>hr</div>`
    },
    list: (...args) => {
        console.log(args, 'list')
        return `<div>list</div>`
    },
    listitem: (...args) => {
        console.log(args, 'listitem')
        return `<div>listitem</div>`
    },
    checkbox: (...args) => {
        console.log(args, 'checkbox')
        return `<div>checkbox</div>`
    },
    paragraph: (...args) => {
        console.log(args, 'paragraph')
        return `<div>${args[0].raw}</div>`
    },
    table: (...args) => {
        console.log(args, 'table')
        return `<div>table</div>`
    },
    tablerow: (...args) => {
        console.log(args, 'tablerow')
        return `<div>tablerow</div>`
    },
    tablecell: (...args) => {
        console.log(args, 'tablecell')
        return `<div>tablecell</div>`
    },
    strong: (...args) => {
        console.log(args, 'strong')
        return `<div>strong</div>`
    },
    em: (...args) => {
        console.log(args, 'em')
        return `<div>em</div>`
    },
    codespan: (...args) => {
        console.log(args, 'codespan')
        return `<div>codespan</div>`
    },
    br: (...args) => {
        console.log(args, 'br')
        return `<div>br</div>`
    },
    del: (...args) => {
        console.log(args, 'del')
        return `<div>del</div>`
    },
    link: (...args) => {
        console.log(args, 'link')
        return `<div>link</div>`
    },
    image: (...args) => {
        console.log(args, 'image')
        return `<div>image</div>`
    },
    text: (...args) => {
        console.log(args, 'text')
        return `<div>text</div>`
    },
}
// 显示器render配置
const viewerRenderOption = {
    code: ({text, lang}) => {
        // console.log(text);
        const validLang = hljs.getLanguage(lang) ? lang : 'plaintext'
        const highlighted = hljs.highlight(text, {language: lang}).value
        // console.log(highlighted)
        const withLineNumbers = injectLineNumbers(highlighted)
        return `<pre class="hljs ${validLang}"><code>${withLineNumbers}</code></pre>`;
    }
}


// 编辑器Marked编译器
const editorMarked = new Marked({
    ...defaoltMarkOption,
    renderer: editorRenderOption
});
// 显示器Marked编译器
const viewerMarked = new Marked({
    ...defaoltMarkOption,
    renderer: viewerRenderOption
});


// 编辑器插件
editorMarked.use(markedCodeFormat()).use()

// 显示器插件
// 自定义表情快速插入
const markedEmojiOptions = {
    emojis: {
        "heart": "❤️",
        "tada": "🎉"
    },
    renderer: (token) => {
        console.log(token)
        return token.emoji
    }
};
// 支持脚注[^1] 会影响原始文本
viewerMarked.use(markedFootnote()).use(markedCodeFormat()).use(markedEmoji(markedEmojiOptions))

addEventListener('message', async (e) => {
    console.log(e.data)
    switch (e.data.type) {
        case 'render': {
            // const editContent = await makeEditContent(e.data.content)
            const viewContent = await makeViewContent(e.data.content)
            postMessage({
                type: 'render',
                content: {
                    viewContent,
                    // editContent,
                },
            })
            break;
        }
    }
})



// 函数

// 使用编译
async function makeEditContent(contents){
    // 去除html innerText两端的空格，将&nbsp;转化为空格
    let content = contents.trim().replace(/  /g, '  ');
    // 过滤不能识别，难识别的字符，空字符
    content = content.replace(/^[\u200B\u200C\u200D\u200E\u200F\uFEFF]/,"");
    // 编译
    content = await editorMarked.parse(content)
    return content
}
async function makeViewContent(contents){
    // 过滤不能识别，难识别的字符，空字符
    let content = contents.replace(/^[\u200B\u200C\u200D\u200E\u200F\uFEFF]/,"");
    // 编译
    content = await viewerMarked.parse(content)
    return content
}