const fs = require('fs')
module.exports = {
    setData(filePath, updateData = [],savePath='') {
        let fileData = this.read(filePath)
        for (let i in updateData) {
            fileData = this.replaceFile(fileData, i, updateData[i])
        }
        this.save(savePath?savePath:filePath, fileData)
    },
    read(filePath) {
        let file = fs.readFileSync(filePath, {
            encoding: 'utf-8'
        })
        return file
    },
    replaceFile(fileData, path, value) {
        const arr = path.split('.')
        const len = arr.length
        const lastItem = arr[len - 1]

        let i = 0
        let fileArr = fileData.split(/\n/)

        for (let index = 0; index < fileArr.length; index++) {
            const item = fileArr[index]
            if (new RegExp(`"${arr[i]}"`).test(item)) ++i;
            if (i === len) {
                const hasComma = /,/.test(item)
                fileArr[index] = item.replace(new RegExp(`"${lastItem}"[\\s\\S]*:[\\s\\S]*`),
                    `"${lastItem}": ${value}${hasComma ? ',' : ''}`)
                break;
            }
        }

        return fileArr.join('\n')
    },
    save(filePath, fileData) {
        fs.writeFileSync(filePath, fileData, {
            "flag": "w"
        })
    }
}