<?php

# retrieve the array $_SESSION to check if $_SESSION['Login'] is set
session_start();

require 'views/head.php';

# require the models
require 'models/Projects.php';
require 'models/Project.php';
require 'models/Info.php';

# require the controller that retrieves all $_POST infos to update or create a file
require 'controllers/PostInfo.php';

# create a new collection of projects from .txt files in a folder
$projects = new Projects();
$projects_folder = 'data/projects/';
$projects->set_projects($projects_folder);

# delete file and remove project if temporary-project.txt is still here
# unless "Delete" has been clicked (which will do the same job + throw a notice)
# and unless "Edit" has been clicked (which continue editing the same temporary project)
if ($_POST['Submit'] != 'delete_project' && $_POST['Submit'] != 'edit_project')
{
	$tempFilename = strval(Project::$amount).'-temporary-filename.txt';
	
	if ($projects->{$tempFilename})
	{
		$projects->{$tempFilename}->delete_file($projects_folder);
		$projects->remove_project($projects->{$tempFilename});
	}
}

# start the HTML form
echo '<form method="post">'."\n";

# if "Log in" has been clicked
if ($_POST['Connect'] == 'login') {

	$submitted_username = $_POST['Username'];
	$username = 'Username';

	# create a salt, hash the submitted password, and retrieve the good hashed password from .txt file
	$salt = 'Salt';
	$submitted_password = sha1(md5($_POST['Password']) . $salt);
	$hashed_password = file_get_contents('data/passwords/street.txt'); # there lies the good encrypted Password…

	# if username or password are wrong show "wrong" notice and login form again
	if ($submitted_password !== $hashed_password || $submitted_username !== $username) {
		require 'views/wrong.php';
		require 'views/login.php';
	}
	# else if password and username are good, keep going with $_SESSION['Login'] = 'connected'
	else if ($submitted_username === $username || $submitted_password === $hashed_password) {
		$_SESSION['Login'] = 'connected';
	}
}

# else if "Log out" has been clicked OR $_SESSION['Login'] is not set (when one first arrives on the page)
else if ( ! isset($_SESSION['Login']) || $_POST['Connect'] == 'logout' )
{
	unset($_SESSION['Login']); # clear $_SESSION['Login'] -> if "Log out" has been clicked
	require 'views/login.php'; # show the login form
}

# if $_SESSION['Login'] == 'connected' (if the good password was submitted)
if ($_SESSION['Login'] == 'connected')
{
	# always require the logout button
	require 'views/logout.php';

	# first arrive on the page: if no project has been selected and no "Submit" button has been clicked
	if ( ! $_POST['Select'] && ! $_POST['Submit'] )
	{
		require 'views/select.php';
	}

	# else if "Edit" has been clicked (and a project has been selected)
	else if ($_POST['Select'] && $_POST['Submit'] == 'edit_project')
	{
		$selectedProject = $projects->{$_POST['Select']};
		require 'views/select.php';
		require 'views/edit.php';
		require 'views/submit.php';
	}

	# else if another project is selected in the select input while a project is being edited or created
	# (javascript submit the select form automatically another project gets selected)
	else if ($_POST['Select'] && ! $_POST['Submit'])
	{
		$selectedProject = $projects->{$_POST['Select']};
		require 'views/select.php';
		require 'views/edit.php';
		require 'views/submit.php';
	}

	# else if "Update" has been clicked (if "Edit" has been clicked before)
	else if ($_POST['Select'] && $_POST['Submit'] == 'update_project')
	{
		$selectedProject = $projects->{$_POST['Select']};

		# gather project info from $_POST entries and apply them in the project object
		$postInfo = new PostInfo();
		$postInfo->overwrite($selectedProject);

		# if all $_POST entries are valid
		if ($postInfo->validation() === true)
		{
			# create file name from project order and title
			$filenamedTitle = $selectedProject->order().'-'.$selectedProject->title()->filenamed();
			
			# if the new file name is different from the former one
			if ($filenamedTitle !== $selectedProject->filename())
			{
				$selectedProject->delete_file($projects_folder); # delete the file
				$selectedProject->set_filename($filenamedTitle); # and give the new file name to the project object
			}

			# update the file with the new info
			# the file is created if it has been deleted in the previous step, else it is only overwritten
			$selectedProject->update_file($projects_folder);

			# show the updated form with a "file well updated" notice
			require 'views/select.php';
			require 'views/submitted.php';
			require 'views/edit.php';
			require 'views/submit.php';
		}
		else
		{
			# show the form again with a "missing (or invalid) information" notice
			require 'views/select.php';
			require 'views/missing.php';
			require 'views/edit.php';
			require 'views/submit.php';
		}
	}

	# else if "Delete" has been clicked (if "Edit" or "New project" had been clicked before)
	else if ($_POST['Select'] && $_POST['Submit'] == 'delete_project')
	{	
		$deletedProject = $projects->{$_POST['Select']};
		$deletedProject->delete_file($projects_folder); # delete project file

		$projects->remove_project($deletedProject); # remove project from projects object

		require 'views/select.php';
		require 'views/deleted.php'; # show a "deleted" notice
	}

	# else if "New project" has been clicked
	else if ($_POST['Submit'] == 'new_project')
	{
		# create an empty project object and adds it to the projects object
		$newProject = new Project();
		$newProject->create_blank(); # empty project is called "[index]-temporary-filename.txt"
		$projects->add_project($newProject);

		$selectedProject = $projects->{$newProject->filename()}; # empty project is added to Projects object
		$selectedProject->update_file($projects_folder); # and an "[index]-temporary-filename.txt" is created (which gets deleted automatically unless saved)

		require 'views/select.php';
		require 'views/edit.php';
		require 'views/create.php';
	}

	# when "Create project" has been clicked (if "New project" had been clicked before)
	# almost the same than "Update project", actually superficial
	else if ($_POST['Select'] && $_POST['Submit'] == 'create_project')
	{
		$selectedProject = $projects->{$_POST['Select']};

		$postInfo = new PostInfo();
		$postInfo->overwrite($selectedProject);

		if ($postInfo->validation() === true)
		{
			$selectedProject->delete_file($projects_folder);

			$filenamedTitle = $selectedProject->order().'-'.$selectedProject->title()->filenamed();
			$selectedProject->set_filename($filenamedTitle);
			$selectedProject->update_file($projects_folder);

			require 'views/select.php';
			require 'views/created.php';
			require 'views/edit.php';
			require 'views/submit.php';
		}
		else {
			require 'views/select.php';
			require 'views/missing.php';
			require 'views/edit.php';
			require 'views/create.php';
		}
	}

	# when "Change projects order" has been clicked
	else if ($_POST['Submit'] == 'change_order')
	{
		# require the necessary components
		require 'views/select.php';
		require 'views/order.php';
	}

	# when "Create project" has been clicked (if "New project" had been clicked before)
	# the reordering process works in symbiosis with javascript
	else if ($_POST['Submit'] == 'new_order')
	{
		# gather new order info ("Index") that have been updated with javascript
		foreach ($_POST['Index'] as $index => $filename) {
			$nameRoot = substr($filename, 1); # remove the former index form the file name
			$newIndex = strval($index+1);
			$newFilename = $newIndex . $nameRoot; # create a new file name from new index and former file name

			# rename the each project file
			$projects->{$filename}->rename_file($newFilename, $projects_folder);

			# update each Project object and update the title in the file content
			$projects->{$filename}->set_filename($newFilename);
			$projects->{$filename}->set_order($newIndex);
			$projects->{$filename}->update_file($projects_folder);
		}

		# reset projects list to display the new order
		$projects->reset_projects();
		$projects->set_projects($projects_folder);

		require 'views/select.php';
		require 'views/order.php';
	}
}

# end the HTML form
echo '</form>'."\n";

require 'views/footer.php';