const fs = require('node-fs')
const sourceFilePath = 'source/tasks.json';
const stats = {
    countAllTasks: 0,
    tasksByDay: {}
}

// const enableFilterByTag = true;
const enableFilterByTag = false;
const filterByTag = "work";
// const outputFileName = "work_report";
const outputFileName = "all_tasks_report";
let countExcluded = 0;
let countIncluded = 0;

// prendre le json source représentant les tâches DONE
console.log(' ### lecture de source/emacs_json.json');

fs.stat(sourceFilePath, function (err, stat) {
    if (err == null) {
        console.log(`File ${sourceFilePath} exists`);
        sortTasksFromJson(stat)
    } else if (err.code === 'ENOENT') {
        // file does not exist
        console.error(`le fichier ${sourceFilePath} est introuvable. Impossible d en extraire des infos.`)
    } else {
        console.log('Some other error: ', err.code);
    }
});

// parcourir les tâches
function sortTasksFromJson(statObject) {
    console.log('sortTasksFromJson')
    fs.readFile(sourceFilePath, 'utf8', function (err, data) {
        if (err) {
            return console.log(err);
        }
        let dataTransformed = JSON.parse(data);
        // console.log('data keys ', Object.keys(dataTransformed))
        if (dataTransformed["contents"]) {


            countTasks = dataTransformed["contents"].length
            stats.countAllTasks = countTasks;

            console.log('yes data ! tasks:', countTasks)

            dataTransformed["contents"].forEach((elem, index) => {

                // console.log('tâche ', index)
                // évacuer les sous tâches
                // if (elem['contents']) {
                //     console.log('content ception, on évacue')
                //     countExcluded++;
                //     return;
                // }
                // filtrer par tag les tâches
                if (enableFilterByTag) {
                    console.log('filtre activé', filterByTag)
                    if (!elem['drawer'] || !elem['properties']['tags']) {


                        console.log('on vire cette tâche n\'ayant pas de drawer :', elem)
                        countExcluded++;
                        return;
                    } else if (
                        elem['properties'] &&
                        typeof elem['properties']['tags'] !== "undefined" &&
                        elem['properties']['tags'].indexOf(filterByTag) === -1
                    ) {
                        console.log('on vire cette tâche ayant les itags :', elem['drawer']['ARCHIVE_ITAGS'])
                        countExcluded++;
                        return;
                    }
                } else {
                    console.log(' - filtre désactivé')
                }
                // après le filtre, on range les tâches

                if (elem['properties']) {
                    console.log(' - ref ', elem['ref'])
                    let title = elem['properties']['raw-value'];
                    let tags = elem['tags'] ? elem['tags'] : [];
                    let closeDate = 'Indéfini';
                    let todoKeyword = 'DONE';
                    if (elem['properties']['closed']) {
                        closeDate = elem['properties']['closed']['end'];

                    } else if (elem['drawer'] && elem['drawer']['ARCHIVE_TIME']) {
                        closeDate = elem['drawer']['ARCHIVE_TIME'];
                    }
                    if (elem['drawer'] && elem['drawer']['ARCHIVE_TODO']) {

                        todoKeyword = elem['drawer']['ARCHIVE_TODO'];
                    }

                    // jour, 11 premiers caractères

                    let day = closeDate.substring(0, 10);
                    if (!stats.tasksByDay[day]) {
                        stats.tasksByDay[day] = []
                    }
                    stats.tasksByDay[day].push({
                        todoKeyword,
                        title,
                        day,
                        closeDate,
                        tags,
                    })
                    // console.log(' ' + title)
                    countIncluded++;
                } else {
                    console.log('no', elem['properties']['raw-value'])
                }
            })

        } else {
            console.log('no content')
        }
        // console.log(data);
        console.log('tâches inclues:', countIncluded)
        writeHtmlOutput()
    });


    // les répartir dans des tableaux selon les périodes de temps
}


// sortir un html présentant les périodes de temps et les tâches réalisées
function writeHtmlOutput() {
    console.log('writeHtmlOutput', stats.countAllTasks)

    let daysListRef = Object.keys(stats.tasksByDay).sort()
    let filterInfo = ``
    if (enableFilterByTag) {
        filterInfo = `<p class="is-info">Contenu filtré sur le tag: ${filterByTag}. ${countExcluded} tâches exclues, ${countIncluded} tâches inclues sur le total de ${countExcluded + countIncluded}</p>`
    }

    let htmlOut = `
    <html>
    <head>
        <title>
        Rapport d'activité
        </title>
        <meta charset="UTF-8" />
         <style>
            @import "https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css";
        </style>
    </head>
    <body>

    <div id="report_days" class="container content">
        <h1 class="title is-1">Feuille de rapport d'activité</h1>
    <p class="subtitle is-1">par <a href="https://www.cipherbliss.com">Tykayn</a> </p>
    ${filterInfo}
    
    `
    daysListRef.reverse().forEach((dayRefString) => {

        let tasksOfTheDay = '';

        stats.tasksByDay[dayRefString].forEach((dayObj) => {
            let graphicKeyword = '✅'
            if ('DONE' !== dayObj.todoKeyword) {
                graphicKeyword = dayObj.todoKeyword;
            }

            let tagDisplay = '';
            if (dayObj.tags.length) {
                tagDisplay = `  <p class="archived-tags tag is-light is-primary">
                  ${dayObj.tags.join(' ')}
                </p>
                `
            }

            tasksOfTheDay += ` <li>
 <h2> 
 <span class="keyword"> ${graphicKeyword}</span>
 <span class="title"> ${dayObj.title} </span>
 </h2>
 ${tagDisplay}
 </li>`
        })
        htmlOut += `
<div class="box">

        <h1 class="title is-1">
            <span class="day-ref">
                ${dayRefString}
            </span>
            <span class="counter pull-right tag is-success is-light">
                ${stats.tasksByDay[dayRefString].length}
            </span>
        </h1>
        
        <div class="day-detail">
            <ul>
                ${tasksOfTheDay}        
            </ul>
        </div>
      
</div>  `
    })
    htmlOut += ` 
 <div class="box">
 <h1 class="title is-1">
 
Tadam, c'est tout!
</h1>
<p>

Source: <a href="https://forge.chapril.org/tykayn/org-report-stats">org-report-stats</a>
<br>
Contactez-moi: <a href="https://www.cipherbliss.com/contact">par un de ces moyens</a>
</p>
</div>
</div>

</body>
</html>
    `

    fs.writeFile('output/output.json', JSON.stringify(stats), function (err, data) {
        if (err) {
            return console.log(err);
        }
        console.log('wrote output json', data)
    })
    fs.writeFile('output/output_' + outputFileName + '.html', htmlOut, function (err, data) {
        if (err) {
            return console.log(err);
        }
        console.log('wrote output html ' + outputFileName, data)

    })
    if (enableFilterByTag) {
        console.log('excluded tasks by tag filter ', countExcluded)
    }
}


function sortObj(obj) {
    return Object.keys(obj).sort().reduce(function (result, key) {
        result[key] = obj[key];
        return result;
    }, {});
}