{% extends "layouts/base.html" %}
{% block title %}{{ _('Calendar') }} - TryoutPro{% endblock %}
{% block page_title %}{{ _('Calendar') }}{% endblock %}
{% block breadcrumb %}<span class="breadcrumb">Home / Calendar</span>{% endblock %}

{% block content %}
<div class="card">
    <div class="card-header">
        <h3><i class="fas fa-calendar-alt"></i> {{ _('Schedule') }}</h3>
        <div class="header-actions">
            <div class="btn-group" role="group">
                <button type="button" class="btn btn-sm btn-outline" data-action="change-view" data-view="dayGridMonth">
                    <i class="fas fa-calendar"></i> {{ _('Month') }}
                </button>
                <button type="button" class="btn btn-sm btn-outline" data-action="change-view" data-view="timeGridWeek">
                    <i class="fas fa-calendar-week"></i> {{ _('Week') }}
                </button>
                <button type="button" class="btn btn-sm btn-outline" data-action="change-view" data-view="timeGridDay">
                    <i class="fas fa-calendar-day"></i> {{ _('Day') }}
                </button>
                <button type="button" class="btn btn-sm btn-outline" data-action="change-view" data-view="listMonth">
                    <i class="fas fa-list"></i> {{ _('List') }}
                </button>
            </div>
        </div>
    </div>
    <div class="card-body">
        <div id="calendar"></div>
    </div>
</div>

<!-- Create Event Modal (for clicking empty days) -->
<div id="createEventModal" class="modal hidden">
    <div class="modal-backdrop" data-action="hide-create-event"></div>
    <div class="modal-content">
        <div class="modal-header">
            <h3><i class="fas fa-plus-circle"></i> {{ _('Create New Event') }}</h3>
            <button class="modal-close" data-action="hide-create-event">&times;</button>
        </div>
        <div class="modal-body">
            <p class="mb-3"><strong>{{ _('Date:') }}</strong> <span id="createEventDate"></span></p>
            <input type="hidden" id="createEventDateInput"/>
            
            <div class="card mb-3">
                <div class="card-body">
                    <h5><i class="fas fa-futbol"></i> {{ _('Schedule Tryout Match') }}</h5>
                    <p class="text-muted small">{{ _('Add a scrim/match inside an existing tryout') }}</p>
                    <div class="form-inline">
                        <select id="createTryoutSelect" class="form-select" style="flex:1;">
                            <option value="">{{ _('-- Select a tryout --') }}</option>
                        </select>
                        <button class="btn btn-sm btn-primary ml-2" data-action="go-tryout-match">
                            <i class="fas fa-arrow-right"></i> {{ _('Go') }}
                        </button>
                    </div>
                </div>
            </div>
            
            <div class="card mb-3">
                <div class="card-body">
                    <h5><i class="fas fa-users"></i> {{ _('Schedule Team Match') }}</h5>
                    <p class="text-muted small">{{ _('Regular season match for an org team') }}</p>
                    <div class="form-inline">
                        <select id="createTeamSelect" class="form-select" style="flex:1;">
                            <option value="">{{ _('-- Select a team --') }}</option>
                        </select>
                        <button class="btn btn-sm btn-success ml-2" data-action="go-team-match">
                            <i class="fas fa-arrow-right"></i> {{ _('Go') }}
                        </button>
                    </div>
                </div>
            </div>
            
            <div class="card">
                <div class="card-body">
                    <h5><i class="fas fa-calendar-plus"></i> {{ _('Create New Tryout') }}</h5>
                    <p class="text-muted small">{{ _('Create a brand new tryout event') }}</p>
                    <button class="btn btn-sm btn-info" data-action="go-create-tryout">
                        <i class="fas fa-plus"></i> {{ _('Create Tryout') }}
                    </button>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Event Details Modal -->
<div id="eventModal" class="modal hidden">
    <div class="modal-backdrop" data-action="hide-event-modal"></div>
    <div class="modal-content">
        <div class="modal-header">
            <h3 id="modalTitle">{{ _('Event Details') }}</h3>
            <button class="modal-close" data-action="hide-event-modal">&times;</button>
        </div>
        <div class="modal-body">
            <div id="modalContent"></div>
            <div id="modalPresenceToggle" class="form-actions mt-3" style="display: none; justify-content: center;">
                <button class="btn btn-sm btn-outline" id="calPresenceBtn">{{ _('Confirm') }}</button>
            </div>
            <div id="modalActions" class="form-actions mt-3" style="display: none;">
                <button class="btn btn-sm btn-danger" id="deleteMatchBtn" style="display: none;">
                    <i class="fas fa-trash"></i> {{ _('Delete Match') }}
                </button>
                <button class="btn btn-sm btn-primary" id="editMatchBtn" style="display: none;">
                    <i class="fas fa-edit"></i> {{ _('Edit Match') }}
                </button>
                <button class="btn btn-sm btn-primary" id="viewTryoutBtn" style="display: none;">
                    <i class="fas fa-eye"></i> {{ _('View Tryout') }}
                </button>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
{# The stylesheet that used to sit here — index.global.min.css — does not
   exist. FullCalendar 6 bundles its styles into the JS, and that file is not
   in the published package: the link had been answering 404 on every calendar
   load since the upgrade. A failed stylesheet is silent in the browser, which
   is why it survived.

   Integrity pins the bundle (QUA-004): this file is executable script from a
   third party, on the page that shows every match in the club. See the note
   in layouts/base.html for what SRI does and does not promise. #}
<script src="https://cdn.jsdelivr.net/npm/fullcalendar@6.1.10/index.global.min.js"
        integrity="sha384-WfE/vOHqht3KDj6FvpwQUf3UxEPUHoGJ3w1yZ8rhpLWnVigt8HjXL2zXqtcfS7mf"
        crossorigin="anonymous"
        referrerpolicy="no-referrer"></script>
<script nonce="{{ csp_nonce }}">
var canScheduleMatches = {% if current_user.can_schedule_matches() %}true{% else %}false{% endif %};

document.addEventListener('DOMContentLoaded', function() {
    var calendarEl = document.getElementById('calendar');
    var calendar = new FullCalendar.Calendar(calendarEl, {
        initialView: 'dayGridMonth',
        headerToolbar: {
            left: 'prev,next today',
            center: 'title',
            right: 'dayGridMonth,timeGridWeek,timeGridDay,listMonth'
        },
        events: '/matches/api/events',
        eventClick: function(info) {
            showEventModal(info.event);
        },
        dateClick: function(info) {
            if (canScheduleMatches) {
                var dateStr = info.dateStr;
                showCreateEventModal(dateStr);
            }
        },
        selectable: true,
        select: function(info) {
            if (canScheduleMatches) {
                var dateStr = info.startStr;
                showCreateEventModal(dateStr);
                calendar.unselect();
            }
        },
        slotMinTime: '12:00:00',
        slotMaxTime: '24:00:00'
    });
    calendar.render();
    
    window.fcCalendar = calendar;
    
    // Pre-load tryout and team options for the create modal
    if (canScheduleMatches) {
        fetchTryoutOptions();
        fetchTeamOptions();
    }
});

function changeView(viewName) {
    if (window.fcCalendar) {
        window.fcCalendar.changeView(viewName);
    }
}

// --- Create Event Modal ---
function showCreateEventModal(dateStr) {
    document.getElementById('createEventDate').textContent = dateStr;
    document.getElementById('createEventDateInput').value = dateStr;
    
    // Reset dropdowns
    document.getElementById('createTryoutSelect').value = '';
    document.getElementById('createTeamSelect').value = '';
    
    document.getElementById('createEventModal').classList.remove('hidden');
}

function hideCreateEventModal() {
    document.getElementById('createEventModal').classList.add('hidden');
}

function goToTryoutMatch() {
    var tryoutId = document.getElementById('createTryoutSelect').value;
    if (!tryoutId) { alert('Please select a tryout.'); return; }
    var date = document.getElementById('createEventDateInput').value;
    window.location.href = '/matches/create/' + tryoutId + '?date=' + date;
}

function goToTeamMatch() {
    var teamId = document.getElementById('createTeamSelect').value;
    if (!teamId) { alert('Please select a team.'); return; }
    var date = document.getElementById('createEventDateInput').value;
    window.location.href = '/team-matches/' + teamId + '/create?date=' + date;
}

function goToCreateTryout() {
    window.location.href = '/tryouts/create';
}

// Pre-fetch data for dropdowns
function fetchTryoutOptions() {
    fetch('/matches/api/manageable-tryouts')
        .then(function(r) { return r.json(); })
        .then(function(data) {
            // new Option() sets the label as text; concatenating it into
            // innerHTML let a tryout title carry markup into the page.
            var sel = document.getElementById('createTryoutSelect');
            sel.replaceChildren(new Option('-- Select a tryout --', ''));
            var today = new Date().toISOString().split('T')[0];
            data.forEach(function(t) {
                // Only show tryouts that haven't ended
                var tryoutEndDate = t.end_date || t.date;
                if (tryoutEndDate >= today) {
                    sel.appendChild(new Option(t.title + ' (' + t.date + ')', t.id));
                }
            });
        })
        .catch(function() {});
}

function fetchTeamOptions() {
    fetch('/team-matches/api/manageable-teams')
        .then(function(r) { return r.json(); })
        .then(function(data) {
            var sel = document.getElementById('createTeamSelect');
            sel.replaceChildren(new Option('-- Select a team --', ''));
            data.forEach(function(t) {
                sel.appendChild(new Option(t.name, t.id));
            });
        })
        .catch(function() {});
}

// ---------------------------------------------------------------------------
// Safe DOM builders
// ---------------------------------------------------------------------------
// Everything rendered in the event modal originates from a JSON endpoint,
// where no HTML escaping applies. Text therefore goes through textContent,
// never through innerHTML.

function makeEl(tag, className, text) {
    var node = document.createElement(tag);
    if (className) { node.className = className; }
    if (text !== undefined && text !== null) { node.textContent = text; }
    return node;
}

function detailItem(label, valueNode, fullWidth) {
    var item = makeEl('div', 'detail-item' + (fullWidth ? ' full-width' : ''));
    item.appendChild(makeEl('span', 'detail-label', label));
    var value = makeEl('span', 'detail-value');
    value.appendChild(valueNode);
    item.appendChild(value);
    return item;
}

// Renders newlines as <br> without letting any other markup through.
function multilineNode(text) {
    var fragment = document.createDocumentFragment();
    String(text).split('\n').forEach(function(line, index) {
        if (index > 0) { fragment.appendChild(document.createElement('br')); }
        fragment.appendChild(document.createTextNode(line));
    });
    return fragment;
}

// A team block: its name, plus an optional list of player names.
function teamNode(name, players) {
    var team = makeEl('div', 'match-team');
    team.appendChild(makeEl('span', 'team-name', name));
    if (players) {
        var list = makeEl('ul', 'team-players-list');
        players.forEach(function(player) {
            list.appendChild(makeEl('li', null, player));
        });
        team.appendChild(list);
    }
    return team;
}

function versusNode(left, right) {
    var wrap = makeEl('div', 'match-teams');
    wrap.appendChild(left);
    wrap.appendChild(makeEl('div', 'match-vs', 'vs'));
    wrap.appendChild(right);
    return wrap;
}

function buildTeamsNode(props) {
    var sides = props.participants.split(' vs ');

    if (props.match_type === 'team_vs_team' && sides.length >= 2) {
        return versusNode(teamNode(sides[0]), teamNode(sides[1]));
    }

    if (props.match_type === 'player_vs_player' && sides.length >= 2) {
        return versusNode(
            teamNode('Team 1', sides[0].split(', ')),
            teamNode('Team 2', sides[1].split(', '))
        );
    }

    return document.createTextNode(props.participants);
}

function showEventModal(event) {
    var props = event.extendedProps;
    var title = event.title;
    var type = props.type;
    var date = event.start ? event.start.toDateString() : '';
    
    // Built as DOM nodes rather than concatenated HTML. Every value below —
    // match title, location, description, and above all the participant list,
    // which is made of user-chosen usernames — comes from a JSON API and has
    // never been HTML-escaped. Assigning it to innerHTML executed it.
    var grid = makeEl('div', 'detail-grid');

    var typeLabel = props.match_type === 'team_vs_team' ? 'Team Match'
                  : (props.match_type === 'player_vs_player' ? 'Player Match' : 'Player Scrim');
    var typeBadgeClass = (props.match_type === 'team_vs_team' || props.match_type === 'player_vs_player')
                       ? 'success' : 'warning';

    grid.appendChild(detailItem('Type', makeEl('span', 'badge badge-' + typeBadgeClass, typeLabel)));
    grid.appendChild(detailItem('Title', document.createTextNode(title)));
    grid.appendChild(detailItem('Date', document.createTextNode(date)));
    grid.appendChild(detailItem('Location', document.createTextNode(props.location || 'TBD')));

    var status = props.status || 'scheduled';
    grid.appendChild(detailItem('Status', makeEl('span', 'badge badge-' + status, status)));

    if (type === 'match' && props.participants) {
        grid.appendChild(detailItem('Teams', buildTeamsNode(props), true));
    }

    if (props.description) {
        grid.appendChild(detailItem('Description', multilineNode(props.description), true));
    }

    var modalContent = document.getElementById('modalTitle');
    modalContent.textContent = 'Match Details';
    var target = document.getElementById('modalContent');
    target.textContent = '';
    target.appendChild(grid);
    
    // Reset buttons
    document.getElementById('deleteMatchBtn').style.display = 'none';
    document.getElementById('editMatchBtn').style.display = 'none';
    document.getElementById('viewTryoutBtn').style.display = 'none';
    
    // Show action buttons for matches (coaches and above)
    if (type === 'match' && canScheduleMatches) {
        document.getElementById('modalActions').style.display = 'flex';
        document.getElementById('editMatchBtn').style.display = 'inline-flex';
        document.getElementById('editMatchBtn').onclick = function() { 
            window.location.href = '/matches/' + props.match_id + '/edit'; 
        };
        document.getElementById('deleteMatchBtn').style.display = 'inline-flex';
        document.getElementById('deleteMatchBtn').onclick = function() {
            if (confirm('Are you sure you want to delete this match?')) {
                deleteCalendarMatch(props.match_id);
            }
        };
    } else {
        document.getElementById('modalActions').style.display = 'none';
    }
    
    // Show presence toggle for matches where user is a participant
    var presenceDiv = document.getElementById('modalPresenceToggle');
    if (type === 'match' && props.user_participant_id) {
        presenceDiv.style.display = 'flex';
        var confirmed = props.user_attendance_confirmed || false;
        var toggleBtn = document.getElementById('calPresenceBtn');
        toggleBtn.textContent = confirmed ? '✅ Confirmed' : 'Confirm';
        toggleBtn.className = 'btn btn-sm ' + (confirmed ? 'btn-success' : 'btn-outline');
        toggleBtn.onclick = function() {
            toggleCalendarPresence(props.match_id, props.user_participant_id, toggleBtn);
        };
    } else {
        presenceDiv.style.display = 'none';
    }
    
    document.getElementById('eventModal').classList.remove('hidden');
}

function deleteCalendarMatch(matchId) {
    fetch('/matches/' + matchId + '/delete', {
        method: 'POST',
        headers: {
            'X-CSRFToken': '{{ csrf_token() }}',
            'Content-Type': 'application/json'
        }
    })
    .then(function(r) { return r.json().catch(function() { return {}; }); })
    .then(function() {
        hideEventModal();
        if (window.fcCalendar) {
            window.fcCalendar.refetchEvents();
        }
    })
    .catch(function(err) {
        console.error('Error deleting match:', err);
        alert('Failed to delete match.');
    });
}

function toggleCalendarPresence(matchId, participantId, btn) {
    fetch('/matches/' + matchId + '/toggle-presence/' + participantId, {
        method: 'POST',
        headers: {
            'X-CSRFToken': '{{ csrf_token() }}',
            'Content-Type': 'application/json'
        }
    })
    .then(function(r) { return r.json(); })
    .then(function(data) {
        if (data.attendance_confirmed) {
            btn.classList.add('btn-success');
            btn.classList.remove('btn-outline');
            btn.textContent = '✅ Confirmed';
        } else {
            btn.classList.remove('btn-success');
            btn.classList.add('btn-outline');
            btn.textContent = 'Confirm';
        }
    })
    .catch(function(err) {
        console.error('Error toggling presence:', err);
    });
}

function hideEventModal() {
    document.getElementById('eventModal').classList.add('hidden');
}

// Behaviours declared in the markup, dispatched by the delegated listener
// in main.js. Inline onclick attributes cannot be authorised by a CSP nonce.
registerActions({
    'change-view': function (element) {
        changeView(element.getAttribute('data-view'));
    },
    'hide-create-event': hideCreateEventModal,
    'go-tryout-match': goToTryoutMatch,
    'go-team-match': goToTeamMatch,
    'go-create-tryout': goToCreateTryout,
    'hide-event-modal': hideEventModal,
});
</script>
{% endblock %}