Create Joomla module

Linked to a google calendar (account login and password should be a parameter stored in joomla database crypted would be great) Show a month over a line with each days (see screen capture) When a cell is selected, a form display to enter a "string event name", a starting date and an end date and a number of days (listbox from 0.5-half day- to 31 days) and also a list of users from joomla to select. The starting date will be the selected date. The end date will be calculated depending on the number of days choosen. When submitting/accepting the choosen start and number of days, the event will be stored inside the google calendar for matching dates. The selected users will be stored (in database or in google calendar....) For displaying existing events from the google calendar, each day will be empty color when no event, and a specific color when there is an event (half day will be half cell) And only previously selected users will be able to see the "string event Name", other users will see just "busy"/colored days. The string event name will show as "hint" box with mouse hover. When clicking a day cell, if there is an event already this day, the form will show with previously entered datas. On top, a listbox with month and listbox with years will be available to navigate in time schedule and show corresponding month. Week number over the day number would be needed.