{% extends "layout.html" %}

{% block title %}{{ title }}{% endblock %}

{% block content %}
<form id="settingsForm">
    {{ breadcrumbs.breadcrumb_header(
        title=title,
        submit_button=True
    ) }}

    <div class="container">
        <div class="card mb-3">
            <div class="card-body">
                <h5 class="card-title">
                    Inventory Settings
                </h5>
                <div class="row">
                    <div class="col">
                        {{ combos.render_combobox(
                            id='brand',
                            options=brands,
                            label='Brands',
                            placeholder='Add a new brand'
                        ) }}
                    </div>
                    <div class="col">
                        {{ combos.render_combobox(
                            id='type',
                            options=types,
                            label='Inventory Types',
                            placeholder='Add a new type'
                        ) }}
                    </div>
                </div>
            </div>
        </div>
        <div class="card">
            <div class="card-body">
                <h5 class="card-title">Location Settings</h5>
                <div class="row">
                    <div class="col">
                        {{ combos.render_combobox(
                            id='section',
                            options=sections,
                            label='Sections',
                            placeholder='Add a new section'
                        ) }}
                    </div>
                    <div class="col">
                        {{ combos.render_combobox(
                            id='function',
                            options=functions,
                            label='Functions',
                            placeholder='Add a new function'
                        ) }}
                    </div>
                </div>
                <div class="row">
                    {% set room_editor %}
                        const roomEditorModal = new bootstrap.Modal(document.getElementById('roomEditor'));
                        const input = document.getElementById('room-input');
                        const name = input.value.trim();
                        const existingOption = Array.from(document.getElementById('room-list').options)
                            .find(opt => opt.textContent.trim() === name);

                        const event = new CustomEvent('roomEditor:prepare', {
                            detail: {
                                id: existingOption?.value ?? '',
                                name: name,
                                sectionId: existingOption?.dataset.sectionId ?? '',
                                functionId: existingOption?.dataset.functionId ?? ''
                            }
                        });

                        document.getElementById('roomEditor').dispatchEvent(event);
                        roomEditorModal.show();

                        document.getElementById('room-input').value = '';
                    {% endset %}
                    <div class="col">
                        {{ combos.render_combobox(
                            id='room',
                            options=rooms,
                            label='Rooms',
                            placeholder='Add a new room',
                            onAdd=room_editor,
                            onEdit=room_editor,
                            data_attributes={'area_id': 'section-id', 'function_id': 'function-id'}
                        ) }}
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="modal fade" id="roomEditor" data-bs-backdrop="static" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <h1 class="modal-title fs-5" id="roomEditorLabel">Room Editor</h1>
                </div>
                <div class="modal-body">
                    <div class="row">
                        <div class="col">
                            <label for="roomName" class="form-label">Room Name</label>
                            <input type="text" class="form-input" id="roomName" placeholder="Enter room name">
                            <input type="hidden" id="roomId">
                        </div>
                    </div>
                    <div class="row">
                        <div class="col">
                            <label for="roomSection" class="form-label">Section</label>
                            <select id="roomSection" class="form-select">
                                <option value="">Select a section</option>
                                {% for section in sections %}
                                    <option value="{{ section.id }}">{{ section.name }}</option>
                                {% endfor %}
                            </select>
                        </div>
                        <div class="col">
                            <label class="form-label">Function</label>
                            <select id="roomFunction" class="form-select">
                                <option value="">Select a function</option>
                                {% for function in functions %}
                                    <option value="{{ function.id }}">{{ function.name }}</option>
                                {% endfor %}
                            </select>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-danger" data-bs-dismiss="modal"
                        id="roomEditorCancelButton">Cancel</button>
                    <button type="button" class="btn btn-primary" id="roomEditorSaveButton">Save</button>
                </div>
            </div>
        </div>
    </div>
</form>
{% endblock %}

{% block script %}
    const formState = {
        brands: {{ brands | tojson }},
        types: {{ types | tojson }},
        sections: {{ sections | tojson }},
        functions: {{ functions | tojson }},
        rooms: {{ rooms | tojson }},
    };

    function buildFormState() {
        function extractOptions(id) {
            const select = document.getElementById(`${id}-list`);
            return Array.from(select.options).map(opt => ({
                name: opt.textContent.trim(),
                id: opt.value || undefined
            }));
        }

        function sanitizeFk(val) {
            return val && val !== "null" && val !== "" ? val : null;
        }

        const roomOptions = Array.from(document.getElementById('room-list').options);
        const rooms = roomOptions.map(opt => {
            const data = opt.dataset;

            return {
                id: opt.value || undefined,
                name: opt.textContent.trim(),
                section_id: sanitizeFk(data.sectionId),
                function_id: sanitizeFk(data.functionId),
            };
        });


        return {
            brands: extractOptions("brand"),
            types: extractOptions("type"),
            sections: extractOptions("section"),
            functions: extractOptions("function"),
            rooms
        };
    }

    document.addEventListener('DOMContentLoaded', () => {
        const modal = document.getElementById('roomEditor');
        const saveButton = document.getElementById('roomEditorSaveButton');
        const cancelButton = document.getElementById('roomEditorCancelButton');
        const form = document.getElementById('settingsForm');


        modal.addEventListener('roomEditor:prepare', (event) => {
            const { id, name, sectionId, functionId } = event.detail;
            document.getElementById('roomId').value = id;
            document.getElementById('roomName').value = name;

            // Populate dropdowns before assigning selection
            const modalSections = document.getElementById('roomSection');
            const modalFunctions = document.getElementById('roomFunction');
            const pageSections = document.getElementById('section-list');
            const pageFunctions = document.getElementById('function-list');

            modalSections.innerHTML = '<option value="">Select a section</option>';
            modalFunctions.innerHTML = '<option value="">Select a function</option>';

            Array.from(pageSections.options).forEach(opt => {
                const option = new Option(opt.textContent, opt.value);
                if (opt.value === sectionId) {
                    option.selected = true;
                }
                modalSections.appendChild(option);
            });

            Array.from(pageFunctions.options).forEach(opt => {
                const option = new Option(opt.textContent, opt.value);
                if (opt.value === functionId) {
                    option.selected = true;
                }
                modalFunctions.appendChild(option);
            });
        });

        form.addEventListener('submit', (event) => {
            event.preventDefault(); 
            try {
                const state = buildFormState();
                fetch('/api/settings', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify(state)
                })
                .then(response => {
                    if (!response.ok) {
                        return response.json().then(data => {
                            throw new Error(data.errors?.join("\n") || "Unknown error");
                        });
                    }
                    return response.json();
                })
                .then(data => {
                    console.log("Sync result:", data);
                })
                .catch(err => {
                    console.error("Submission error:", err);
                });
            } catch (err) {
                console.error("Failed to build form state:", err);
            }
        });

        saveButton.addEventListener('click', () => {
            const name = document.getElementById('roomName').value.trim();
            const sectionVal = document.getElementById('roomSection').value;
            const funcVal = document.getElementById('roomFunction').value;
            let idRaw = document.getElementById('roomId').value;

            if (!name) {
                alert('Please enter a room name.');
                return;
            }

            const roomList = document.getElementById('room-list');
            let existingOption = Array.from(roomList.options).find(opt => opt.value === idRaw);

            // If it's a brand new ID, generate one (string-based!)
            if (!idRaw) {
                idRaw = ComboBoxWidget.createTempId("room");
            }

            if (!existingOption) {
                existingOption = ComboBoxWidget.createOption(name, idRaw);
                roomList.appendChild(existingOption);
            }

            existingOption.textContent = name;
            existingOption.value = idRaw;
            existingOption.dataset.sectionId = sectionVal || "";
            existingOption.dataset.functionId = funcVal || "";

            ComboBoxWidget.sortOptions(roomList);

            // Update formState.rooms
            const index = formState.rooms.findIndex(r => r.id === idRaw);
            const payload = {
                id: idRaw,
                name,
                section_id: sectionVal !== "" ? sectionVal : null,
                function_id: funcVal !== "" ? funcVal : null
            };

            if (index >= 0) {
                formState.rooms[index] = payload;
            } else {
                formState.rooms.push(payload);
            }

            bootstrap.Modal.getInstance(modal).hide();
        });

        cancelButton.addEventListener('click', () => {
            bootstrap.Modal.getInstance(modal).hide();
        });
    });
{% endblock %}