<?php

class TicketController {

    protected function check_access($f3){
        if(!$f3->exists('SESSION.user')){
            // $f3->set('SESSION.error', 'You don\'t have permission for this ticket.');
            $f3->reroute('/login');
        }
    }

    // list all tickts
    public function index($f3){
        $this->check_access($f3);

        $db = $f3->get('DB');

        // retrieve tickets
        $tickets = $db->exec('SELECT * FROM tickets ORDER BY created_at DESC');

        // pass data to template
        $f3->set('tickets', $tickets);

        // render
        $f3->set('content', '../ui/views/ticket/index.html');
        echo \Template::instance()->render('../ui/templates/layout.html');

        $f3->clear('SESSION.error');
    }

    // view a single ticket
    public function view($f3){
        $this->check_access($f3);

        $ticket_id = $f3->get('PARAMS.id');
        $db = $f3->get('DB');

        $result = $db->exec(
            'SELECT t.*, u.username as created_by_name
            FROM tickets t
            LEFT JOIN users u ON t.created_by = u.id
            WHERE t.id =? LIMIT 1',
            [$ticket_id]
        );

        if(!$result){
            // no record
            $f3->set('SESSION.error', 'Ticket not found.');
            $f3->reroute('/tickets');
        }

        $ticket = $result[0];
        $f3->set('ticket', $ticket);

        // render
        $f3->set('content', '../ui/views/ticket/view.html');
        echo \Template::instance()->render('../ui/templates/layout.html');

    }

    // show create form
    public function createForm($f3){
        $this->check_access($f3);
        $f3->set('content', '../ui/views/ticket/create.html');
        echo \Template::instance()->render('../ui/templates/layout.html');
    }

    // handle POST
    public function create($f3){
        $this->check_access($f3);

        $title = $f3->get('POST.title');
        $description = $f3->get('POST.description');
        $priority = $f3->get('POST.priority');   // eg - low, medium, high
        $status = $f3->get('POST.status');   // eg - new, in_progress
        $created_by = $f3->get('SESSION.user.id'); // current logged in user

        $db = $f3->get('DB');

        $db->exec(
            'INSERT 
                INTO tickets (title, description, priority, status, created_by, created_at, updated_at)
                VALUES (?,?,?,?,?,NOW(), NOW())',
                [$title, $description, $priority, $status, $created_by]
        );

        $f3->reroute('/tickets');
    }

    protected function get_ticket_check_edit_permission($f3){

        $db = $f3->get('DB');
        
        $ticket_id = $f3->get('PARAMS.id');
        $result = $db->exec('SELECT * FROM tickets WHERE id = ? LIMIT 1', [$ticket_id]);

        if(!$result){
            $f3->set('SESSION.error', 'Ticket not found.');
            $f3->reroute('/tickets');
        }

        $ticket = $result[0];

        // TODO: refine
        $current_user = $f3->get('SESSION.user');
        $is_admin = (isset($current_user['role']) && $current_user['role'] == 'admin');
        $is_assigned = ($ticket['assigned_to'] == $current_user['id']);

        if(!$is_admin && !$is_assigned){ // should this be ||
            // if not assigned and not admin, disallow edit
            $f3->set('SESSION.error', 'You do not have permission to edit this ticket.');
            $f3->reroute('/tickets');
        }

        return $ticket;

    }

    // show edit form
    public function editForm($f3){
        $this->check_access($f3);

        $ticket_id = $f3->get('PARAMS.id');
        $db = $f3->get('DB');
        

        $ticket = $this->get_ticket_check_edit_permission($f3);
        $f3->set('ticket', $ticket);

        $f3->set('ticket', $ticket);
        $f3->set('content', '../ui/views/ticket/edit.html');
        echo \Template::instance()->render('../ui/templates/layout.html');
    }

    // process edit POST TODO: if assigned or admin
    public function update($f3){
        $this->check_access($f3);
        $ticket = $this->get_ticket_check_edit_permission($f3);
        $ticket_id = $ticket['id'];
        $db = $f3->get('DB');

        // get updated fields from post
        $title = $f3->get('POST.title');
        $description = $f3->get('POST.description');
        $priority = $f3->get('POST.priority');   // eg - low, medium, high
        $status = $f3->get('POST.status');   // eg - new, in_progress
        $updated_by = $f3->get('SESSION.user.id'); // current logged in user
        
        // TODO: if you want to update assignment, should be added here.

        $db->exec(
            'UPDATE tickets
            SET title=?, description=?, priority=?, status=?, updated_by=?, updated_at=?
            WHERE id=?', 
            [$title, $description, $priority, $status, $updated_by, 'NOW()', $ticket_id]
        );

        $f3->reroute('/ticket/' . $ticket_id);
    }

}