const fs = require('node-fs');
const sourceFilePath = './sources/tasks.json';
const stats = {
  countAllTasks: 0,
  tasksByDay   : [],
  tasksByMonth : [],
  tasksByYear  : [],

};

// 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 ${sourceFilePath}`);

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.`, err);
  } 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'];
          }
          if (!tags.length && elem['drawer'] && elem['drawer']['ARCHIVE_ITAGS']) {

            tags += elem['drawer']['ARCHIVE_ITAGS'];
          }

          // jour, 11 premiers caractères

          let day = closeDate.substring(0, 10);
          let month = closeDate.substring(0, 7);
          console.log('month', month)
          let year = closeDate.substring(0, 4);
          let taskDescription = {
            todoKeyword,
            title,
            day,
            closeDate,
            tags,
          };

          if (!stats.tasksByDay[day]) {
            stats.tasksByDay[day] = [];
          }
          if (!stats.tasksByMonth[month]) {
            stats.tasksByMonth[month] = {
              period: month,
              tasks : [],
            };
          }
          if (!stats.tasksByYear[year]) {
            stats.tasksByYear[year] = {
              period: year,
              tasks : [],
            };
          }

          stats.tasksByDay[day].push(taskDescription);
          stats.tasksByMonth[month].tasks.push(taskDescription);
          stats.tasksByYear[year].tasks.push(taskDescription);
          // 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
}

/**
 * Retourne un html présentant le nombre de tâches réalisées pour chaque mois
 * @return {string}
 */
function RenderStatsMonth() {

  let months = Object.keys(stats.tasksByMonth);
  console.log('months.length', months.length);

  let monthHTML = '';


  months.forEach((elem) => {

    monthData = stats.tasksByMonth[elem]
    console.log('monthData.tasks.length', monthData.tasks.length)

    monthHTML += `
        <div class='columns'>
            <div class='column'>
              <h2 class='title is-2'>   
                  ${monthData.period}
              </h2>
            </div>
            <div class='column'>
              ${monthData.tasks.length}
            </div>
        </div>
        `;
  });
  return `
    <div class='box'>
        <h1 class='title is-1'>Stats mensuelles</h1>
        ${monthHTML}
    </div>
    `;
}

// 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}
    ${RenderStatsMonth()}
    
    `;
  daysListRef.reverse().forEach((dayRefString) => {

    let tasksOfTheDay = '';

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

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