/* global DesignerOfflineDB */
// js/designer/database.js
// eslint-disable-next-line no-unused-vars

/* global db, selectedPage:writable */
// js/designer/init.js

/* global DesignerMove */
// js/designer/move.js

/* global DesignerObjects */
// js/designer/objects.js
var DesignerPage = {};

DesignerPage.showTablesInLandingPage = function (db) {
  DesignerPage.loadFirstPage(db, function (page) {
    if (page) {
      DesignerPage.loadHtmlForPage(page.pgNr);
      selectedPage = page.pgNr;
    } else {
      DesignerPage.showNewPageTables(true);
    }
  });
};

DesignerPage.saveToNewPage = function (db, pageName, tablePositions, callback) {
  DesignerPage.createNewPage(db, pageName, function (page) {
    if (page) {
      var tblCords = [];

      var saveCallback = function (id) {
        tblCords.push(id);

        if (tablePositions.length === tblCords.length) {
          page.tblCords = tblCords;
          DesignerOfflineDB.addObject('pdf_pages', page);
        }
      };

      for (var pos = 0; pos < tablePositions.length; pos++) {
        tablePositions[pos].pdfPgNr = page.pgNr;
        DesignerPage.saveTablePositions(tablePositions[pos], saveCallback);
      }

      if (typeof callback !== 'undefined') {
        callback(page);
      }
    }
  });
};

DesignerPage.saveToSelectedPage = function (db, pageId, pageName, tablePositions, callback) {
  DesignerPage.deletePage(pageId);
  DesignerPage.saveToNewPage(db, pageName, tablePositions, function (page) {
    if (typeof callback !== 'undefined') {
      callback(page);
    }

    selectedPage = page.pgNr;
  });
};

DesignerPage.createNewPage = function (db, pageName, callback) {
  var newPage = new DesignerObjects.PdfPage(db, pageName);
  DesignerOfflineDB.addObject('pdf_pages', newPage, function (pgNr) {
    newPage.pgNr = pgNr;

    if (typeof callback !== 'undefined') {
      callback(newPage);
    }
  });
};

DesignerPage.saveTablePositions = function (positions, callback) {
  DesignerOfflineDB.addObject('table_coords', positions, callback);
};

DesignerPage.createPageList = function (db, callback) {
  DesignerOfflineDB.loadAllObjects('pdf_pages', function (pages) {
    var html = '';

    for (var p = 0; p < pages.length; p++) {
      var page = pages[p];

      if (page.dbName === db) {
        html += '<option value="' + page.pgNr + '">';
        html += Functions.escapeHtml(page.pageDescr) + '</option>';
      }
    }

    if (typeof callback !== 'undefined') {
      callback(html);
    }
  });
};

DesignerPage.deletePage = function (pageId, callback) {
  DesignerOfflineDB.loadObject('pdf_pages', pageId, function (page) {
    if (page) {
      for (var i = 0; i < page.tblCords.length; i++) {
        DesignerOfflineDB.deleteObject('table_coords', page.tblCords[i]);
      }

      DesignerOfflineDB.deleteObject('pdf_pages', pageId, callback);
    }
  });
};

DesignerPage.loadFirstPage = function (db, callback) {
  DesignerOfflineDB.loadAllObjects('pdf_pages', function (pages) {
    var firstPage = null;

    for (var i = 0; i < pages.length; i++) {
      var page = pages[i];

      if (page.dbName === db) {
        // give preference to a page having same name as the db
        if (page.pageDescr === db) {
          callback(page);
          return;
        }

        if (firstPage === null) {
          firstPage = page;
        }
      }
    }

    callback(firstPage);
  });
};

DesignerPage.showNewPageTables = function (check) {
  var allTables = $('#id_scroll_tab').find('td input:checkbox');
  allTables.prop('checked', check);

  for (var tab = 0; tab < allTables.length; tab++) {
    var input = allTables[tab];

    if (input.value) {
      var element = document.getElementById(input.value);
      element.style.top = DesignerPage.getRandom(550, 20) + 'px';
      element.style.left = DesignerPage.getRandom(700, 20) + 'px';
      DesignerMove.visibleTab(input, input.value);
    }
  }

  selectedPage = -1;
  $('#page_name').text(Messages.strUntitled);
  DesignerMove.markUnsaved();
};

DesignerPage.loadHtmlForPage = function (pageId) {
  DesignerPage.showNewPageTables(true);
  DesignerPage.loadPageObjects(pageId, function (page, tblCords) {
    $('#name-panel').find('#page_name').text(page.pageDescr);
    var tableMissing = false;

    for (var t = 0; t < tblCords.length; t++) {
      var tbId = db + '.' + tblCords[t].tableName;
      var table = document.getElementById(tbId);

      if (table === null) {
        tableMissing = true;
        continue;
      }

      table.style.top = tblCords[t].y + 'px';
      table.style.left = tblCords[t].x + 'px';
      var checkbox = document.getElementById('check_vis_' + tbId);
      checkbox.checked = true;
      DesignerMove.visibleTab(checkbox, checkbox.value);
    }

    DesignerMove.markSaved();

    if (tableMissing === true) {
      DesignerMove.markUnsaved();
      Functions.ajaxShowMessage(Messages.strSavedPageTableMissing);
    }

    selectedPage = page.pgNr;
  });
};

DesignerPage.loadPageObjects = function (pageId, callback) {
  DesignerOfflineDB.loadObject('pdf_pages', pageId, function (page) {
    var tblCords = [];
    var count = page.tblCords.length;

    for (var i = 0; i < count; i++) {
      DesignerOfflineDB.loadObject('table_coords', page.tblCords[i], function (tblCord) {
        tblCords.push(tblCord);

        if (tblCords.length === count) {
          if (typeof callback !== 'undefined') {
            callback(page, tblCords);
          }
        }
      });
    }
  });
};

DesignerPage.getRandom = function (max, min) {
  var val = Math.random() * (max - min) + min;
  return Math.floor(val);
};