const fs = require('fs');
const path = 'e:\\I code\\pages\\index\\index.js';

try {
    let content = fs.readFileSync(path, 'utf8');

    // Define old and new function
    // We use a simple string replace for the function head and body start
    const oldFn = `    revealNext: function (e) {
        const index = e.currentTarget.dataset.index;`;

    const newFn = `    revealNext: function (e) {
        const index = (e.detail && e.detail.index !== undefined) ? e.detail.index : e.currentTarget.dataset.index;`;

    if (content.indexOf(oldFn) === -1) {
        console.log('Could not find exact function match. Trying flexible match...');
        // regex fallback
        content = content.replace(
            /revealNext:\s*function\s*\(e\)\s*\{\s*const\s*index\s*=\s*e\.currentTarget\.dataset\.index;/g,
            `revealNext: function (e) {
        const index = (e.detail && e.detail.index !== undefined) ? e.detail.index : e.currentTarget.dataset.index;`
        );
    } else {
        content = content.replace(oldFn, newFn);
    }

    // Add viewCardDetail if missing
    if (content.indexOf('viewCardDetail:') === -1) {
        const insertPoint = `        }
    },

    // --- 展示解读内容 ---`;

        // Find the end of revealNext and insert viewCardDetail
        // revealNext ends, usually followed by showInterpretation
        const showInterp = `    // --- 展示解读内容 ---`;

        const newMethod = `    // 查看已翻开牌的详情
    viewCardDetail: function(e) {
        const index = (e.detail && e.detail.index !== undefined) ? e.detail.index : e.currentTarget.dataset.index;
        const card = this.data.drawnCards[index];
        if (card) {
            wx.showToast({
                title: card.name + (card.isReversed ? '(逆)' : ''),
                icon: 'none',
                duration: 1500
            });
        }
    },

    // --- 展示解读内容 ---`;

        content = content.replace(showInterp, newMethod);
    }

    fs.writeFileSync(path, content, 'utf8');
    console.log('Successfully updated index.js functions');

} catch (e) {
    console.error(e);
}