var express = require('express');
var fs = require('fs');
var _ = require('lodash');

var parseString = require("xml2js").parseString;
var router = express.Router();

let searchTagsForHebdoReport = /\b(dev|sysadmin|écriture|edu|fediverse|april|chapril)\b/g;
let convertFiles = true;
// let convertFiles = false;
let computeDataOnExtract = true;
// let computeDataOnExtract = false;

let jsonAllData = {
    all: {},
    tasks: {},
    stats: {},
    projects: {},
    tags: {},
    weeklyDevReport: ''
}
/* GET home page. */
/**
 * convertir le fichier XML et
 * obtenir la liste de tags que l'on a entré dans GTG
 */
router.get('/xml', async function (req, res, next) {

    console.log(' ### lecture de sources/gtg_data.xml');
    fs.stat('sources/gtg_data.xml', function (err, stat) {
        if (err == null) {
            console.log('File sources/gtg_data.xml exists');
        } else if (err.code === 'ENOENT') {
            // file does not exist
            res.send('le fichier sources/gtg_data.xml est introuvable. Impossible d en extraire des infos. Importez d abord les fichiers de données xml de Getting Things Gnome dans le dossier sources')
        } else {
            console.log('Some other error: ', err.code);
        }
    });

    convertOneXmlToJson('gtg_data', res)
    console.log('success conversion xml')
    res.render('layout', {
        title: 'Conversion en Json',
        message: 'ok fichier converti'
    })
    // res.redirect('/')
})

/**
 * voir le compte rendu des tâches
 */
router.get('/', async function (req, res, next) {

    console.log(" ### récupérer le contenu des json sources/gtg_data_gtg.json")
    jsonAllData.all = require('../sources/gtg_data_gtg.json')
    if (!jsonAllData.all.gtgData) {
        res.redirect('/xml')
    }

    if (computeDataOnExtract) {

        jsonAllData = computeData(jsonAllData)
        computeDataOnExtract = false;
    } else {
        console.log('================== calcul de stats désactivé dans index.js ================== ')
    }
    exportToMarkdown(res)
    console.log('json files read')
    res.render('index', {
        title: "Conversion de GTG tâches",
        json: jsonAllData,
        markdown: markdownExportData,
        getPercent,
        computeBgColorOnProportionOfOpenTasks,
        getPercentOfOpenTasks
    })
});

async function readfileJson(fileToOpen) {
    fs.readFile(`sources/${fileToOpen}`, "utf-8", function (err, data) {
        if (err) console.log(err);
        console.log('ok ', fileToOpen)
        return JSON.parse(data)
    });
}

function computeData(jsonConvertedData) {
    let gtgData = jsonConvertedData.all.gtgData

    console.log('================== calcul des tâches depuis le fichier json ================== ')
    console.log('gtgData : ');
    console.log(gtgData);

    // trouver le nombre de tâches ayant un tag en particulier
    // et rajouter ce nombre à chaque tag, dans countTasks : N

    let counterOfTasks = gtgData.tasklist[0].task
    // compter les tâches
    // console.log('counterOfTasks',counterOfTasks);

    jsonAllData.all = gtgData

    jsonAllData.stats = {
        tasksCount         : counterOfTasks.length,
        // tasksCount: 0,
        tasksClosed: 0,
        tasksOpen: 0,
        maxTasksCountPerTag: 0,
        listTags: [],
        listOpen: [],
        listOpenWeekly: [],
        listOpenMonthly: [],
        listClosed: [],
        listClosedWeekly: [],
        tasksListIsDismissByTitle: [],
        listDevWeeklyClosed: [],
        listDevWeeklyOpen: [],
        listClosedMonthly: [],
    }
    let now = new Date();
    jsonAllData.stats.listTags = gtgData.taglist[0].tag

    console.log('tasks', gtgData.tasklist[0].task);
    for (let taskItem of gtgData.tasklist[0].task) {

        // count open and closed tasks

        let now = new Date()

        if (taskItem['$'].status == 'Active') {
            jsonAllData.stats.listOpen.push(taskItem)
            let addeddate = new Date(taskItem.addeddate)
            let daysDiff = getNumberOfDaysDiffTwoDates(addeddate, now);

            if (daysDiff <= 7) {
                jsonAllData.stats.listOpenWeekly.push(taskItem)
                // listDevWeeklyOpen
                // tâches uniquement de dev
                if ((searchTagsForHebdoReport).test(taskItem['$'].tags)
                ) {
                    jsonAllData.stats.listDevWeeklyOpen.push(taskItem)
                }
            } else if (daysDiff >= 7 & daysDiff <= 31) {
                jsonAllData.stats.listOpenMonthly.push(taskItem)
            }

        } else if (taskItem['$'].status == 'Done') {
            jsonAllData.stats.listClosed.push(taskItem)
            let donedate = new Date(taskItem.donedate)
            let daysDiff = getNumberOfDaysDiffTwoDates(donedate, now);

            if (daysDiff <= 7) {
                jsonAllData.stats.listClosedWeekly.push(taskItem)

                // tâches uniquement de dev
                if ((searchTagsForHebdoReport).test(taskItem['$'].tags)
                ) {
                    jsonAllData.stats.listDevWeeklyClosed.push(taskItem)
                }
            } else if (daysDiff >= 7 & daysDiff <= 31) {
                jsonAllData.stats.listClosedMonthly.push(taskItem)
            }

        }

        for (let tag of jsonAllData.stats.listTags) {
            // console.log('tag', tag)
            jsonAllData.stats.listTags.map(elem => {
                // console.log('elem', elem)
                if (elem['$'].name == tag) {
                    if (!elem.tasks) {
                        elem.tasks = 0
                    }
                    if (!elem.tasksListById) {
                        elem.tasksListById = []
                    }
                    if (!elem.tasksListByTitle) {
                        elem.tasksListByTitle = []
                    }
                    if (!elem.tasksListIsActiveByTitle) {
                        elem.tasksListIsActiveByTitle = []
                    }
                    if (!elem.tasksListIsDoneByTitle) {
                        elem.tasksListIsDoneByTitle = []
                    }
                    elem.tasks++
                    elem.tasksListById.push(taskItem['$'].id)
                    elem.tasksListByTitle.push(taskItem.title)
                    if (taskItem['$'].status == "Active") {
                        elem.tasksListIsActiveByTitle.push(taskItem.title)
                    }
                    if (taskItem['$'].status == "Done") {
                        elem.tasksListIsDoneByTitle.push(taskItem.title)
                    }
                    if (taskItem['$'].status == "Dismiss") {
                        elem.tasksListIsDismissByTitle.push(taskItem.title)
                    }
                }
                if (elem.tasks > jsonAllData.stats.maxTasksCountPerTag) {
                    jsonAllData.stats.maxTasksCountPerTag = elem.tasks
                }
            })

        }
    }
    // sort tags by name

    console.log('stats', jsonAllData);
    return jsonAllData

}

const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds
function getNumberOfDaysDiffTwoDates(firstDate, secondDate) {
    return Math.round(Math.abs((firstDate - secondDate) / oneDay));
}

function convertOneXmlToJson(fileToOpen, res) {
    fs.readFile(`sources/${fileToOpen}.xml`, "utf-8", function (err, data) {
        if (err) console.log(err);
        const results = transformToJson(data, fileToOpen, res)
        console.log('#### fichier converti en json', res)

    });
}

function getPercentOfOpenTasks(someCount) {
    return Math.round(100 * someCount / jsonAllData.stats.tasksOpen)
}

function getPercent(someCount, total) {
    return Math.round(100 * someCount / total)
}

function computeBgColorOnProportionOfOpenTasks(someProportionNumber) {
    let result = '';

    if (someProportionNumber >= 95) {
        result = 'proportion-over-95'
    } else if (someProportionNumber >= 90) {
        result = 'proportion-over-90'
    } else if (someProportionNumber >= 80) {
        result = 'proportion-over-80'
    } else if (someProportionNumber >= 65) {
        result = 'proportion-over-65'
    } else if (someProportionNumber >= 50) {
        result = 'proportion-over-50'
    } else if (someProportionNumber >= 40) {
        result = 'proportion-over-40'
    } else if (someProportionNumber >= 25) {
        result = 'proportion-over-25'
    } else if (someProportionNumber >= 15) {
        result = 'proportion-over-15'
    }

    return result;
}

let datenow = new Date();
let markdownExportData = ''
let dataTagsMd = ''


function exportToMarkdown(res) {
    let weeklyDevReport = ''
    console.log('jsonAllData.stats', jsonAllData.stats);

    markdownExportData = `# Export de Tâches GTG \n date:   ` + datenow.toLocaleString()
    // fichier de rapport des tâches fermées durant les 7 derniers jours
    weeklyDevReport = `\n# Rapport hebdomadaire de dev  `;
    weeklyDevReport += `\n## 1/ Actions passées ou en cours
\n `
    weeklyDevReport += `\r\n##  ${jsonAllData.stats.listDevWeeklyClosed.length}  ont été fermées
  \n___`;
    jsonAllData.stats.listDevWeeklyClosed.map(elem => {
        weeklyDevReport += `\n| ${elem['$'].tags} | ${elem.title}|`;
    })
    weeklyDevReport += `
\n___
\n
\n## 2/ Actions à venir
\n `
    weeklyDevReport += `\r\n##  ${jsonAllData.stats.listDevWeeklyOpen.length}  ont été ouvertes
  \n___`;
    jsonAllData.stats.listDevWeeklyOpen.map(elem => {
        // weeklyDevReport += `\n| ${elem['$'].tags} | ${elem.title}|`;
        weeklyDevReport += `\n| ${elem.title}|`;
    })
    weeklyDevReport += `
\n___
\n
\n## 3/ Points de blocage / points en retard corrigés cette semaine
\n
\n## 4/ Points de blocage existants / points en retard à traiter
\n
\n## 5/ Points forts de la semaine
\n
\n## 6/ Points de vigilance de la semaine
\n
\n## 7/ Points forts de la réunion
\n
\n## 8/ Points de vigilance de la réunion `;

    markdownExportData += `\n   ${weeklyDevReport}`;
    markdownExportData += `\n---`;
    markdownExportData += `\n   `;
    markdownExportData += `\n# Rapport des tâches durant les 7 derniers jours  `;
    markdownExportData += `\n   `;
    markdownExportData += `\n##  ${jsonAllData.stats.listClosedWeekly.length}  ont été fermées  `;
    markdownExportData += `\n   `;
    jsonAllData.stats.listClosedWeekly.map(elem => {
        markdownExportData += `\n * ${elem.title}`;
    })
    markdownExportData += `\n## ${jsonAllData.stats.listOpenWeekly.length}  ont été ouvertes  `;
    markdownExportData += `\n   `;
    jsonAllData.stats.listOpenWeekly.map(elem => {
        markdownExportData += `\n * ${elem.title}`;
    })
    markdownExportData += `\n---  `;
    // fichier de rapport des tâches fermées durant les 31 derniers jours
    markdownExportData += `\n# Rapport des autres tâches durant le mois  `;
    markdownExportData += `\n   `;
    markdownExportData += `\n##  ${jsonAllData.stats.listClosedMonthly.length} ont été fermées  `;
    markdownExportData += `\n   `;
    jsonAllData.stats.listClosedMonthly.map(elem => {
        markdownExportData += `\n * ${elem.title}`;
    })
    markdownExportData += `\n## ${jsonAllData.stats.listOpenMonthly.length} ont été ouvertes  `;
    markdownExportData += `\n   `;
    jsonAllData.stats.listOpenMonthly.map(elem => {
        markdownExportData += `\n * ${elem.title}`;
    })

    markdownExportData += `\n---  `;
    // stats de fermeture des tâches
    markdownExportData += `\n# Stats de fermeture des tâches  `;
    markdownExportData += `\n   `;
    markdownExportData += `\n---  `;
    markdownExportData += `\n   `;
    markdownExportData += `\n# Export de toutes les ${jsonAllData.stats.listOpen.length} tâches ouvertes GTG \n   `;
    markdownExportData += `\n   `;

    jsonAllData.stats.listOpen.map(elem => {
      dataTagsMd += `\n## ${elem.title}  `;
      dataTagsMd += `\n  statut : ${elem['$'].status}  `;
      dataTagsMd += `\n  créé le : ${elem.addeddate}  `;
      dataTagsMd += `\n  modifié le : ${elem.modified}  `;
      dataTagsMd += `\n  prévu pour : ${elem.duedate | ''}  `;
      dataTagsMd += `\n  ${elem.content}  `;
    })
    markdownExportData += `\n---  `;
    markdownExportData += `\n   `;
    markdownExportData += `\n# Export de toutes les ${jsonAllData.stats.listClosed.length}  tâches fermées GTG \n   `;
    markdownExportData += `\n   `;

    jsonAllData.stats.listClosed.map(elem=>{
      dataTagsMd += `\n * ${elem.title}  `;
    })

    markdownExportData += `\n   `;
    markdownExportData += `\n# Export de Tags GTG \n   `;
    markdownExportData += `\n   `;
    markdownExportData += `\n   `;

    let sortedTagsByTitle = _.sortBy(jsonAllData.stats.listTags, [(o) => {
        o["$"].name
    }])

    sortedTagsByTitle.map(elem => {
        markdownExportData += `\n * ${elem['$'].name} , ${elem.tasks | 0}`;
    })

    markdownExportData += `\n   `;
    markdownExportData += `\n rapport généré avec gtg2nodejs par tykayn - contact@cipherbliss.com  `;

    jsonAllData.weeklyDevReport = weeklyDevReport;

    // write file to disk
    fs.writeFile(`output/export_hebdo.md`, markdownExportData, `utf8`, (err) => {

        if (err) {
            console.log(`Error writing file: ${err}`);
            res.send(err)
        } else {
            console.log(`File \`output/export_tags.md\` is written successfully!`);

        }

    });

}

/**
 * transformToJson
 * @param xml
 * @param fileToOpen
 * @param res
 * @returns {*}
 */
function transformToJson(xml, fileToOpen, res) {
    return parseString(xml, function (err, result) {
        if (err) console.log(err);

        // console.dir(JSON.stringify(result));
        console.log('Done');

        // write file to disk
        fs.writeFile(`output/${fileToOpen}_gtg.json`, JSON.stringify(result, null, 4), 'utf8', (err) => {

            if (err) {
                console.log(`Error writing file: ${err}`);
                // return JSON.stringify(result)

                res.send(err)
            } else {
                console.log(` ### File \`output/${fileToOpen}_gtg.json\` is written successfully!`);

            }

        });
    });
}

module.exports = router;