Employees Project Working Time Recording

I am working as an engineering consultant for many projects, most of our workers are using computers and sometimes going outside for site inspections or document approval. We are looking for software that would monitor all employees not by recording their screen at any time, but only when they choose to work in any of the projects. So, I suppose this is our scenario that we need: - When the employee set on his computer and start it, the starting time would be recorded as his attending time in the office. - A list of projects would be always available for him on his screen to choose the project that he should work on. - If he chooses any project to work on, the time should be recorded and screenshots should be taken at interval time to make sure he was working on the chosen project. also, the mouse clicks should be recorded to make sure he is not opening the project and stay in front of it do nothing. if the mouse movement shows that he is not working then the time should stop recording tell he starts to work again. - The employee can choose to stay ideal than the project time recording will stop and he would be free. - the employee can choose he would go outside and he can choose the reason and the expected time to come back. - The software can give me the total number of hours that all employees worked on as well as all the hours spent on a certain project by all the employees. - The software should give me the attending time and leave time for each employee. - The software can work on any computer and can work for any branch and remote employees even those who would work at home. - the software should have a place to store this date and can be accessed by some admins. - Adding projects in the list and giving access to it to certain employees controlled by the admin - The software could allow to discuss and send messages and stop or activate any employee. - Employees information should be available to the admin at anytime More options can be added later