{% extends "base.html" %}
{% load i18n %}
{% load crispy_forms_tags %}

{% block page_custom_head %}
    <style>
        .grid-cell {
            transition: background-color 0.3s ease;
        }
    </style>
{% endblock %}

{% block content %}
<div class="card card-primary card-outline">
    <div class="card-header">
        <h3 class="card-title">{{ title }}</h3>
    </div>
    <form method="post">
        {% csrf_token %}
        <div class="card-body">
            <div class="row">
                <div class="col-12">
                    {{ form|crispy }}
                </div>
            </div>

            <!-- Schedule Grid Visualization -->
            {% if profile %}
            <div class="row mt-4">
                <div class="col-12">
                    <div class="card card-outline card-secondary">
                        <div class="card-header">
                            <h4 class="card-title">{% trans "Schedule Visualization" %}</h4>
                        </div>
                        <div class="card-body p-1">
                            <div class="schedule-grid-container mb-1">
                                <div class="schedule-grid-header d-flex text-center mb-0">
                                    <div class="flex-grow-1">Mon
                                    </div>
                                    <div class="flex-grow-1">Tue
                                    </div>
                                    <div class="flex-grow-1">Wed
                                    </div>
                                    <div class="flex-grow-1">Thu
                                    </div>
                                    <div class="flex-grow-1">Fri
                                    </div>
                                    <div class="flex-grow-1">Sat
                                    </div>
                                    <div class="flex-grow-1" >Sun
                                    </div>
                                </div>
                                <div class="schedule-grid-body">
                                    {% for hour in "012345678901234567890123"|make_list %}
                                    <div class="d-flex align-items-center mb-0">
                                        <div class="grid-row flex-grow-1 d-flex gap-0" style="height: 6px;">
                                            {% for day in "0123456"|make_list %}
                                            <div class="grid-cell flex-grow-1 border-bottom border-end"
                                                id="cell-{{ day }}-{{ forloop.parentloop.counter0 }}"
                                                title="{{ forloop.parentloop.counter0 }}:00"
                                                style="background-color: #f8f9fa;">
                                            </div>
                                            {% endfor %}
                                        </div>
                                    </div>
                                    {% endfor %}
                                </div>
                            </div>
                            <div class="d-flex  mt-0 justify-content-center">
                                <span><i class="fas fa-circle" style="color: #28a745;"></i> {% trans "Active" %}</span> &nbsp;
                                <span><i class="fas fa-circle" style="color: #dc3545;"></i> {% trans "Inactive" %}</span>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Existing Table -->
            <div class="row mt-4">
                <div class="col-12">
                    <div class="d-flex justify-content-between align-items-center mb-3">
                        <h4>{% trans "Time Intervals" %}</h4>
                        <a href="{% url 'manage_scheduler_slot' %}?profile_uuid={{ profile.uuid }}"
                            class="btn btn-sm btn-primary">
                            <i class="fas fa-plus"></i> {% trans "Add Interval" %}
                        </a>
                    </div>
                    <div class="table-responsive">
                        <table class="table table-hover">
                            <thead>
                                <tr>
                                    <th>{% trans "Start Day" %}</th>
                                    <th>{% trans "Start Time" %}</th>
                                    <th>{% trans "End Day" %}</th>
                                    <th>{% trans "End Time" %}</th>
                                    <th class="text-end">{% trans "Actions" %}</th>
                                </tr>
                            </thead>
                            <tbody>
                                {% for slot in slots %}
                                <tr>
                                    <td>{{ slot.get_start_weekday_display }}</td>
                                    <td>{{ slot.start_time }}</td>
                                    <td>{{ slot.get_end_weekday_display }}</td>
                                    <td>{{ slot.end_time }}</td>
                                    <td class="text-end">
                                        <a href="{% url 'manage_scheduler_slot' %}?uuid={{ slot.uuid }}"
                                            class="btn btn-sm btn-outline-primary" title="{% trans 'Edit' %}">
                                            <i class="fas fa-edit"></i>
                                        </a>
                                        <a href="{% url 'delete_scheduler_slot' %}?uuid={{ slot.uuid }}"
                                            class="btn btn-sm btn-outline-danger" title="{% trans 'Delete' %}">
                                            <i class="fas fa-trash"></i>
                                        </a>
                                    </td>
                                </tr>
                                {% empty %}
                                <tr>
                                    <td colspan="5" class="text-center text-muted">
                                        {% trans "No time intervals found." %}
                                    </td>
                                </tr>
                                {% endfor %}
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
            {% endif %}

            <div class="row mt-4">
                <div class="col-12 d-flex justify-content-end gap-2">
                    <button type="submit" class="btn btn-primary">
                        <i class="fas fa-save"></i> {% trans "Save" %}
                    </button>
                    <a href="{% url 'scheduler_profile_list' %}" class="btn btn-secondary">
                        <i class="fas fa-times"></i> {% trans "Cancel" %}
                    </a>
                </div>
            </div>
        </div>
    </form>
</div>
{% endblock %}

{% block custom_page_scripts %}
    <script>
        document.addEventListener('DOMContentLoaded', function () {
            const slots = [
                {% for slot in slots %}
                    {
                        start_day: {{ slot.start_weekday }},
                        end_day: {{ slot.end_weekday }},
                        start_time: "{{ slot.start_time|time:'H:i' }}",
                        end_time: "{{ slot.end_time|time:'H:i' }}"
                    },
                {% endfor %}
            ];

            function timeToMinutes(timeStr) {
                const [hours, minutes] = timeStr.split(':').map(Number);
                return hours * 60 + minutes;
            }

            function isHourCovered(day, hour) {
                const hourStart = hour * 60;
                const hourEnd = (hour + 1) * 60;

                // Normalize day to 0-6 (Mon-Sun)
                // Note: Our model uses 0=Monday, which matches the grid loop

                for (const slot of slots) {
                    let currentDay = slot.start_day;
                    let currentMinutes = timeToMinutes(slot.start_time);

                    // Calculate total duration in minutes
                    let totalMinutes = 0;
                    let endMinutes = timeToMinutes(slot.end_time);

                    let tempDay = slot.start_day;
                    while (tempDay != slot.end_day) {
                        totalMinutes += 1440; // 24 * 60
                        tempDay = (tempDay + 1) % 7;
                    }
                    totalMinutes = totalMinutes - currentMinutes + endMinutes;
                    if (totalMinutes < 0) totalMinutes += 7 * 1440; // Wrap around week

                    // Check if the hour [day:hourStart, day:hourEnd] overlaps with [slotStart, slotEnd]
                    // Convert everything to week minutes
                    const slotStartWeekMinutes = slot.start_day * 1440 + currentMinutes;
                    const hourStartWeekMinutes = day * 1440 + hourStart;
                    const hourEndWeekMinutes = day * 1440 + hourEnd;

                    // Handle wrap around week
                    const weekTotal = 7 * 1440;

                    // A simple way is to check the range [slotStart, slotStart + totalMinutes]
                    // and see if the hour (or its week-repetitions) overlaps it.

                    // Try for current week and next week (to handle wrap)
                    for (let offset of [0, -weekTotal, weekTotal]) {
                        const s = slotStartWeekMinutes + offset;
                        const e = s + totalMinutes;

                        if (Math.max(s, hourStartWeekMinutes) < Math.min(e, hourEndWeekMinutes)) {
                            return true;
                        }
                    }
                }
                return false;
            }

            for (let day = 0; day < 7; day++) {
                for (let hour = 0; hour < 24; hour++) {
                    const cell = document.getElementById(`cell-${day}-${hour}`);
                    if (cell) {
                        if (isHourCovered(day, hour)) {
                            cell.style.backgroundColor = '#28a745'; // green-ish
                        } else {
                            cell.style.backgroundColor = '#dc3545'; // red-ish
                        }
                    }
                }
            }
        });
    </script>
{% endblock %}