//WebMetrik - Web Analytics
//Git : https://git.raphix.fr/lib/webmetrik
//Author : Raphix

const basics = require('./basics.js');
const fs = require('fs');

module.exports.setMetricFile = (path) => {
    basics.setMetricsFile(path);
    const metricsFile = basics.getMetricsFile();
}


module.exports.Metric = class {
    name;
    description;
    value;
    constructor(name, description) {
        const metricsFile = basics.getMetricsFile();
        //Check if the metric already exists and set the value and description of the metric
        if(basics.getMetricsFile().findIndex(x => x.name == name) != -1) {
            this.name = name;
            this.description = basics.getMetricsFile()[basics.getMetricsFile().findIndex(x => x.name == name)].description;
            this.value = basics.getMetricsFile()[basics.getMetricsFile().findIndex(x => x.name == name)].value;
        } else {
            this.name = name;
            this.description = description;
            this.value = 0;

            //save it to the file
            basics.saveMetricsFile([...basics.getMetricsFile(), {name: this.name, description: this.description, value: this.value}])

        }

    }

    setValue(value) {

        //get the value of the metric from the file and set it to the value of the metric
        this.value = basics.getMetricsFile()[basics.getMetricsFile().findIndex(x => x.name == this.name)].value;
      
        //save it to the file
        basics.saveMetricsFile(basics.getMetricsFile().map(x => {
            if(x.name == this.name) {
                x.value = value;
            }
            return x;
        }))
    }

    getValue() {
        //get the value of the metric from the file and set it to the value of the metric
        this.value = basics.getMetricsFile()[basics.getMetricsFile().findIndex(x => x.name == this.name)].value;
        return this.value;
    }   

    setDescription(description) {
        //get the value of the metric from the file and set it to the value of the metric
        this.value = basics.getMetricsFile()[basics.getMetricsFile().findIndex(x => x.name == this.name)].value;
      
        //save it to the file
        basics.saveMetricsFile(basics.getMetricsFile().map(x => {
            if(x.name == this.name) {
                x.description = description;
            }
            return x;
        }))
    }       

    clearMetric() {
        //delete the metric from the file
        basics.saveMetricsFile(basics.getMetricsFile().filter(x => x.name != this.name))
    }

}


module.exports.publishMetrics = (port, privateKey) => {
    const http = require('http');
    const url = require('url');

    const server = http.createServer((req, res) => {
        const parsedUrl = url.parse(req.url, true);
        const pathname = parsedUrl.pathname;
        const query = parsedUrl.query;

        if(pathname == "/metrics") {
            if(query.privatekey == privateKey) {
                res.writeHead(200, {'Content-Type': 'application/json'});
                res.end(JSON.stringify(basics.getMetricsFile()));
            } else {
                res.writeHead(403, {'Content-Type': 'application/json'});
                res.end(JSON.stringify({error: "Invalid private key"}));
            }
        } else {
            res.writeHead(404, {'Content-Type': 'application/json'});
            res.end(JSON.stringify({error: "Invalid path"}));
        }
    })

    server.listen(port, () => {
        console.log("WebMetrik is listening on port " + port);
    })
}


// CHeck if the metric exitst and delete it

module.exports.deleteMetric = (name) => {
    if(basics.getMetricsFile().findIndex(x => x.name == name) != -1) {
        basics.saveMetricsFile(basics.getMetricsFile().filter(x => x.name != name))
    } 
}