const { tles2czml } = require('./tle2czml')
const fs = require('fs')

const czmlGenerator = (fileName) => {
    let czmlName
    switch(fileName){
        case('BEIDOU'):
        czmlName = 'beidou' 
        break;
        case('GALILEO'):
        czmlName = 'galileo' 
        break;
        case('GLONASS'):
        czmlName = 'glo-ops' 
        break;
        case('GPS'):
        czmlName = 'gps-ops' 
        break;
        default:
        break;
    }
    fs.readFile(`./public/tle2/${fileName}.txt`, 'utf-8', (err, data) => {
        if (err) {
            console.log(err)
            return
        } else {
            let tle = []
            let tlearr = data.split('\r\n')
            if (tlearr[tlearr.length - 1] == '') {
                tlearr.pop()
            }
            for (let i = 0; i < tlearr.length; i = i + 3) {
                tle.push({
                    name: tlearr[i].trim(),
                    tle1: tlearr[i + 1],
                    tle2: tlearr[i + 2]
                })
            }
            let czml = tles2czml(new Date(new Date()-24*60*60*1000*7), new Date(), tle, fileName)
            fs.writeFile(`./czml/${czmlName}.czml`, JSON.stringify(czml), (error) => {
                if(error){
                    console.log(error)
                }
                console.log(`文件 ${czmlName}.czml 创建成功！`)
            })
        }
    })
}

czmlGenerator('BEIDOU')
czmlGenerator('GALILEO')
czmlGenerator('GLONASS')
czmlGenerator('GPS')