//Loguix - Système de log simplifié
//Concu par Raphael PICOT - Raphix
//GIT : https://git.raphix.fr/lib/loguix

const fs = require("fs")
const path = require("path")
const basic = require("./basics")

var isSetup = false
var logInstance = new Map()
var logStream = null

/**
 * Configuration du module
 * @param {string} logsDir 
 * @param {string} packageJsonPath
 */
module.exports.setup = function(logsDir, packageJsonPath) {

    if(!isSetup) {

        if(!logsDir) {
            return new Error("[Loguix] - Error in Setup : MISS_LOGS_DIR")
    
        }
        if(!fs.existsSync(logsDir + path.sep)) { 
            fs.mkdir(logsDir, (err) => {
                if(!err) {
                   
    
                    console.log("[Logs] - Dossier de logs crée ! !")
     
                } else {
    
                    console.log("[Logs] - Erreur d'écriture par manque de permission ")
                    console.log(err)
                }
    
            })
        
        }
    
        logStream = fs.createWriteStream(logsDir + path.sep + basic.getDate(true) + ".log", {
            flags: 'a'
        });

        var nameOfPackage = "Unknown"
        var versionOfPackage = "-.-.-"
        
        try {
            const packageJson = fs.readFileSync(packageJsonPath)  
            const packageJsonParsed = JSON.parse(packageJson)
            nameOfPackage = packageJsonParsed.name
            versionOfPackage = packageJsonParsed.version
        } catch (error) {
            console.log("[Loguix] - Error in Setup : INVALID_PACKAGE_JSON")
            console.log(error)
        }

        const packageJson = fs.readFileSync(packageJsonPath)  
        
        logStream.write("[" + nameOfPackage + "@"+ versionOfPackage + "] - [" + basic.getDate(true) + "]" + "\n")
        logStream.write("----------------------------------------------------------------" + "\n")
    
        process.on('uncaughtException', (err) => {
            console.error("["+ "FATAL" + "] - The application has encountered an error ! Please Restart ! #E = " + err + "\n")
            console.error(err)
            logStream.write("[" + basic.getDate() + "] - ["+ "FATAL" + "] - The application has encountered an error ! Please Restart ! #E = " + err + "\n")
            logStream.end( "["+ "UNCAUGHT_EXCEPTION" + "]" + " - [END OF LOGS] - [" + basic.getDate()  + ']')
            logStream.close()
             
        });
        
        
        process.on('beforeExit', (err) => {
            logStream.end( "["+ "BEFORE_EXIT" + "]" + " - [END OF LOGS] - [" + basic.getDate(true)  + ']')
            logStream.close()
             
        });

        isSetup = true
    
    } else {

        console.log("Loguix is already configure")
    }
    
   
   
    
 
}

/**
 * Déclare une nouvelle section
 * @param {string} typeName Nom de la section associé
 */
module.exports.LogType = class {

    constructor(typeName) {
        this.type = typeName;
        this.steps = new Map()
        this.step = this.initializeStep()
        logInstance.set(typeName, this)
    }

    log(txt) {

       
        
        var logtext = "[" + this.type + "] - [INFO] - " + txt
        logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
        console.log(logtext)
        
    
    }

    warn(txt) {
        
        var logtext = "[" + this.type + "] - [WARN] - " + txt
        logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
        console.log(logtext)
        
    }

    error(txt) {


        var logtext = "[" + this.type + "] - [ERROR] - " + txt
        logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
        console.log(logtext)
    
    
       
    }


    

    initializeStep() {
        const parent = this;
        return { 
            init: function(id, desc) {
                parent.steps.set(id, desc)
                var logtext = "[" + parent.type + "] - [INFO] - [STEP] - " + desc + " - En cours ..."
                logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
                console.log(logtext)
            
            },
            end: function(id) {
                
                if(parent.steps.has(id)) {
                    
                    var logtext = "[" + parent.type + "] - [INFO] - [STEP] - " + parent.steps.get(id) + " - Terminé !"
                    logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
                    console.log(logtext)
                    parent.steps.delete(id)
                } else {
                    
                    var logtext = "[" + parent.type + "] - [WARN] - [STEP] - '" + id +  "' n'est pas enregistré en tant qu'étape !"
                    logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
                    console.log(logtext)

                }
            
            },
            error: function(id, errorDesc) {

                if(parent.steps.has(id)) {
                   
                    var logtext = "[" + parent.type + "] - [ERROR] - [STEP] - " + parent.steps.get(id) + " - Une erreur a été rencontré dans l'étape ! : #E = " + errorDesc
                    logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
                    console.log(logtext)
                    parent.steps.delete(id)
                } else {
                    
                    var logtext = "[" + parent.type + "] - [WARN] - [STEP] - '" + id +  "' n'est pas enregistré en tant qu'étape !"
                    logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
                    console.log(logtext)

                }

            }
        }
    
    }

}

module.exports.getInstance = function (name) {

    if(logInstance.has(name)) {

        return logInstance.get(name)

    } else {

        var logtext = "[Logs] - [ERROR] - '" + name +  "' n'est pas enregistré en tant qu'instance de log !"
        logStream.write("[" + basic.getDate() + "] - " + logtext + "\n")
        console.error(logtext)

        return null
    }

}