module.exports = {
    theme: 'craftdocs',
    ga: 'UA-39036834-9',
    base: '/v3/',
    shouldPrefetch: () => false,
    locales: {
        '/': {
            lang: 'en-US',
            title: 'Craft 3 Documentation',
        },
        '/ja/': {
            lang: 'ja',
            title: 'Craft 3 ドキュメント',
        }
    },
    themeConfig: {
        docsRepo: 'craftcms/cms',
        docsDir: 'docs',
        docsBranch: 'develop',
        editLinks: true,
        locales: {
            '/': require('./config-en'),
            '/ja/': require('./config-ja')
        },
        nav: [
            {
                text: 'Craft CMS',
                items: [
                    { text: 'Craft 2 Documentation', link: 'https://docs.craftcms.com/v2/' },
                    { text: 'Craft 3 Documentation', link: '/' },
                    { text: 'Craft 2 Class Reference', link: 'https://docs.craftcms.com/api/v2/' },
                    { text: 'Craft 3 Class Reference', link: 'https://docs.craftcms.com/api/v3/' },
                ]
            },
            {
                text: 'Craft Commerce',
                items: [
                    { text: 'Commerce 1 Documentation', link: 'https://docs.craftcms.com/commerce/v1/' },
                    { text: 'Commerce 2 Documentation', link: 'https://docs.craftcms.com/commerce/v2/' },
                    { text: 'Commerce 2 Class Reference', link: 'https://docs.craftcms.com/commerce/api/v2/' },
                ]
            },
            { text: 'Craftnet API', link: 'https://docs.api.craftcms.com/' },
        ],
        codeLanguages: {
            twig: 'Twig',
            php: 'PHP',
        }
    },
    markdown: {
        anchor: {
            level: [2, 3, 4]
        },
        toc: {
            format(content) {
                return content.replace(/[_`]/g, '')
            }
        },
        config(md) {
            md
                .use(replaceApiLinks)
                .use(require('vuepress-theme-craftdocs/markup'))
                .use(require('markdown-it-deflist'))
        }
    },
}

function replaceApiLinks(md) {
    // code adapted from the markdown-it-replace-link plugin
    md.core.ruler.after(
        'inline',
        'replace-link',
        function (state) {
            state.tokens.forEach(function (blockToken) {
                if (blockToken.type === 'inline' && blockToken.children) {
                    blockToken.children.forEach(function (token, tokenIndex) {
                        if (token.type === 'link_open') {
                            token.attrs.forEach(function (attr) {
                                if (attr[0] === 'href') {
                                    let replace = replaceApiLink(attr[1]);
                                    if (replace) {
                                        attr[1] = replace;
                                        let next = blockToken.children[tokenIndex+1];
                                        if (next.type === 'text') {
                                            next.content = next.content.replace(/^(api|config):/, '');
                                        }
                                    }
                                }
                                return false;
                            });
                        }
                    });
                }
            });
            return false;
        }
    );
}

function replaceApiLink(link) {
    link = decodeURIComponent(link)
    let m = link.match(/^(?:api:)?\\?([\w\\]+)(?:::\$?(\w+)(\(\))?)?(?:#([\w\-]+))?$/)
    if (m) {
        let className = m[1]
        let subject = m[2]
        let isMethod = typeof m[3] !== 'undefined'
        let hash = m[4]

        if (className.match(/^craft\\/) || className.match(/^Craft/)) {
            let url = 'https://docs.craftcms.com/api/v3/'+className.replace(/\\/g, '-').toLowerCase()+'.html'
            if (subject) {
                hash = ''
                if (isMethod) {
                    hash = 'method-'
                } else if (!subject.match(/^EVENT_/)) {
                    hash = 'property-'
                }
                hash += subject.replace(/_/g, '-').toLowerCase()
            }
            return url + (hash ? `#${hash}` : '');
        }

        if (className.match(/^yii\\/) || className.match(/^Yii/)) {
            let url = 'https://www.yiiframework.com/doc/api/2.0/'+className.replace(/\\/g, '-').toLowerCase()
            if (subject) {
                hash = (isMethod ? `${subject}()` : `\$${subject}`)+'-detail'
            }
            return url + (hash ? `#${hash}` : '');
        }

        if (className.match(/^Twig/)) {
            let url = 'https://twig.symfony.com/api/2.x/'+className.replace(/\\/g, '/')+'.html'
            if (subject) {
                hash = '#method_'+subject
            }
            return url + (hash ? `#${hash}` : '');
        }
    }

    m = link.match(/^config:(.+)/)
    if (m) {
        return '/config/config-settings.md#'+m[1].toLowerCase()
    }
}