@extends('layouts.master')

@section('styles')
    <style>
        #country-results, #keyword-results {
            max-height: 200px; /* Set a maximum height for the dropdown */
            overflow-y: auto; /* Enable vertical scrolling if content exceeds max height */
        }
    </style>
@endsection

@section('content')

    <div class="page-header">
        <h1 class="page-title">{{ __('menu.reports.title') }}</h1>
    </div>

    <div class="row row-sm">
        <div class="col-12">
            <div class="card">
                <div class="card-body">
                    <div class="row">

                        <div class="col-2">
                            <div class="form-group">
                                <label for="country-search">Select Countries:</label>
                                <input type="text" id="country-search" class="form-control" placeholder="Type to search countries...">
                            </div>
                            <div id="selected-countries" class="mt-4">
                                <div id="selected-country-list" class="d-flex flex-wrap gap-2">
                                    <!-- Selected countries will appear here -->
                                </div>
                            </div>
                        </div>

                        <div class="col-3" style="display:none;">
                            <div class="form-group">
                                <label for="keyword-search">Select Keywords:</label>
                                <input type="text" id="keyword-search" class="form-control" placeholder="Type to search keywords...">
                            </div>
                            <div id="selected-keywords" class="mt-4">
                                <div id="selected-keyword-list" class="d-flex flex-wrap gap-2">
                                    <!-- Selected keywords will appear here -->
                                </div>
                            </div>
                        </div>

                        <div class="col-3" style="display:none;">
                            <div class="form-group" >
                                <label for="freeform-keywords">Freeform Keywords (comma separated):</label>
                                <input type="text" id="freeform-keywords" class="form-control" placeholder="e.g., sustainability, polar research, climate">
                            </div>
                        </div>


                        <div class="col-2">
                            <div class="form-group">
                                <label for="start-year">Start Year:</label>
                                <input type="number" id="start-year" class="form-control" placeholder="e.g., 2015">
                            </div>
                        </div>

                        <div class="col-2">
                            <div class="form-group">
                                <label for="end-year">End Year:</label>
                                <input type="number" id="end-year" class="form-control" placeholder="e.g., 2023">
                            </div>
                        </div>
                    </div>

                    <div class="col-12 btn btn-primary mt-4" id="search-button">Search</div>

                </div>
            </div>
        </div>

        <div class="col-12">
            <div class="card">
                <div class="card-body">
                    <h3 class="mb-4">Report Preview</h3>
                    <p style="display: none">Selected Countries: <span id="preview-countries">None</span></p>
                    <p style="display: none">Selected Keywords: <span id="preview-keywords">None</span></p>
                    <p style="display: none">Freeform Keywords: <span id="preview-freeform">None</span></p>

                    <!-- Additional report preview content can go here -->
                    <div id="chart_div"></div>
                    <!-- <button id="download-chart" class="btn btn-secondary mt-3">Download Chart as PNG</button>-->
                </div>
            </div>
        </div>

    </div>

    <div class="container mt-4">
        <div id="country-results" class="dropdown-menu"
             style="position: absolute; z-index: 1050; width: 100%; display: none;"></div>
    </div>

    <div class="container mt-4">
        <div id="keyword-results" class="dropdown-menu"
             style="position: absolute; z-index: 1050; width: 100%; display: none;"></div>
    </div>
@endsection

@section('scripts')
    <script>
        document.addEventListener('DOMContentLoaded', function () {
            // Input alanlarını seçin ve temizleyin
            const inputs = document.querySelectorAll('input[type="text"]');
            inputs.forEach(input => input.value = '');

            const countryResultsDropdown = document.getElementById('country-results');
            const keywordResultsDropdown = document.getElementById('keyword-results');
            const countrySearchInput = document.getElementById('country-search');
            const keywordSearchInput = document.getElementById('keyword-search');

            // Seçim yapıldığında inputları temizle
            countryResultsDropdown.addEventListener('click', function (event) {
                if (event.target && event.target.matches('.dropdown-item')) {
                    countrySearchInput.value = '';
                }
            });

            keywordResultsDropdown.addEventListener('click', function (event) {
                if (event.target && event.target.matches('.dropdown-item')) {
                    keywordSearchInput.value = '';
                }
            });

            const selectedCountryList = document.getElementById('selected-country-list');

            const selectedKeywordList = document.getElementById('selected-keyword-list');

            let selectedCountries = [];
            let selectedKeywords = [];

            countrySearchInput.addEventListener('input', async function () {
                const query = countrySearchInput.value.trim();
                countryResultsDropdown.innerHTML = '';

                if (query.length > 0) {
                    try {
                        const response = await fetch(`/api/country/search?query=${encodeURIComponent(query)}`);
                        const data = await response.json();

                        if (data.success_code === 200 && Array.isArray(data.data)) {
                            const filteredCountries = data.data;

                            // Clear previous results to avoid duplicates
                            countryResultsDropdown.innerHTML = '';

                            filteredCountries.forEach(country => {
                                const countryItem = document.createElement('a');
                                countryItem.className = 'dropdown-item';
                                countryItem.textContent = country.name;
                                countryItem.style.cursor = 'pointer';
                                countryItem.addEventListener('click', function (event) {
                                    event.preventDefault(); // Prevent default link behavior
                                    if (!selectedCountries.includes(country.id)) {
                                        selectedCountries.push(country.id);
                                        updateSelectedCountries();
                                        countryResultsDropdown.style.display = 'none'; // Hide popup after selection
                                        countrySearchInput.value = ''; // Clear input after selection
                                    }
                                });
                                countryResultsDropdown.appendChild(countryItem);
                            });
                            const rect = countrySearchInput.getBoundingClientRect();
                            countryResultsDropdown.style.top = `${rect.bottom + window.scrollY}px`;
                            countryResultsDropdown.style.left = `${rect.left + window.scrollX}px`;
                            countryResultsDropdown.style.width = `${rect.width}px`;
                            countryResultsDropdown.style.display = 'block'; // Show popup
                        } else {
                            countryResultsDropdown.innerHTML = '<a class="dropdown-item disabled">No countries found.</a>';
                            countryResultsDropdown.style.display = 'block'; // Show popup
                        }
                    } catch (error) {
                        console.error('Error fetching countries:', error);
                    }
                } else {
                    countryResultsDropdown.style.display = 'none'; // Hide popup if input is empty
                }
            });

            function updateSelectedCountries() {
                selectedCountryList.innerHTML = '';
                selectedCountries.forEach(country => {
                    const countryBadge = document.createElement('div');
                    countryBadge.className = 'badge bg-primary text-white d-flex align-items-center';
                    countryBadge.style.padding = '0.5rem';
                    countryBadge.style.borderRadius = '0.5rem';
                    countryBadge.style.gap = '0.5rem';

                    const countryName = document.createElement('span');
                    countryName.textContent = country;

                    const removeButton = document.createElement('span');
                    removeButton.className = 'ms-2';
                    removeButton.style.cursor = 'pointer';
                    removeButton.innerHTML = '&times;';
                    removeButton.addEventListener('click', function () {
                        selectedCountries = selectedCountries.filter(c => c !== country);
                        updateSelectedCountries();
                    });

                    countryBadge.appendChild(countryName);
                    countryBadge.appendChild(removeButton);
                    selectedCountryList.appendChild(countryBadge);
                });
            }

            const fetchResultsCountry = (query) => fetch(`/api/country/search?query=${query}`).then(res => res.json());
            const fetchResultsKeyword = (query) => fetch(`/api/search/keywords?query=${query}`).then(res => res.json());

            function handleSearch(input, dropdown, type, fetchFn) {
                input.addEventListener('input', async () => {
                    const query = input.value.trim();
                    dropdown.innerHTML = '';

                    if (query.length < 2) {
                        dropdown.style.display = 'none';
                        return;
                    }

                    try {
                        const response = await fetchFn(query);
                        if (!response.data || response.data.length === 0) {
                            dropdown.innerHTML = '<a class="dropdown-item disabled">No results found.</a>';
                            dropdown.style.display = 'block';
                            return;
                        }

                        dropdown.innerHTML = '';
                        response.data.forEach(item => {
                            const option = document.createElement('a');
                            option.className = 'dropdown-item';
                            option.textContent = item.name;
                            option.href = '#';
                            option.style.cursor = 'pointer';
                            option.addEventListener('click', function (e) {
                                e.preventDefault();
                                addSelectedItem({ id: item.id, name: item.name }, type);
                                dropdown.style.display = 'none';
                                input.value = '';
                            });
                            dropdown.appendChild(option);
                        });

                        const rect = input.getBoundingClientRect();
                        dropdown.style.top = `${rect.bottom + window.scrollY}px`;
                        dropdown.style.left = `${rect.left + window.scrollX}px`;
                        dropdown.style.width = `${rect.width}px`;
                        dropdown.style.display = 'block';

                    } catch (err) {
                        console.error(`Error fetching ${type}:`, err);
                    }
                });
            }


            function createBadge(item, type, selectedArray, selectedList) {
                const badge = document.createElement('div');
                badge.className = 'badge bg-primary text-white d-flex align-items-center';
                badge.style.padding = '0.5rem';
                badge.style.borderRadius = '0.5rem';
                badge.style.gap = '0.5rem';

                const nameSpan = document.createElement('span');
                nameSpan.textContent = item.name;

                const removeButton = document.createElement('span');
                removeButton.className = 'ms-2';
                removeButton.style.cursor = 'pointer';
                removeButton.innerHTML = '&times;';
                removeButton.addEventListener('click', function () {
                    const index = selectedArray.findIndex(i => i.id === item.id);
                    if (index !== -1) {
                        selectedArray.splice(index, 1);
                    }
                    selectedList.removeChild(badge);
                    updatePreview(type, selectedArray);
                });

                badge.appendChild(nameSpan);
                badge.appendChild(removeButton);
                selectedList.appendChild(badge);
            }

            function addSelectedItem(item, type) {
                const selectedList = type === 'countries' ? selectedCountryList : selectedKeywordList;
                const selectedArray = type === 'countries' ? selectedCountries : selectedKeywords;

                if (selectedArray.find(i => i.id === item.id)) return;

                selectedArray.push(item);
                createBadge(item, type, selectedArray, selectedList);
                updatePreview(type, selectedArray);
            }

            handleSearch(countrySearchInput, countryResultsDropdown, 'countries', fetchResultsCountry);
            handleSearch(keywordSearchInput, keywordResultsDropdown, 'keywords', fetchResultsKeyword);

            // Search button click event listener
            document.getElementById('search-button').addEventListener('click', async function () {
                const countryIds = selectedCountries.map(country => country.id); // Collect selected country IDs
                const keywordIds = selectedKeywords.map(keyword => keyword.id); // Collect selected keyword IDs

                const freeformInput = document.getElementById('freeform-keywords').value.trim();
                const freeformKeywords = freeformInput
                    .split(',')
                    .map(keyword => keyword.trim())
                    .filter(keyword => keyword.length > 0);

                const startYear = document.getElementById('start-year').value.trim();
                const endYear = document.getElementById('end-year').value.trim();

                try {
                    const response = await fetch('/api/publications/search', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').getAttribute('content')
                        },
                        body: JSON.stringify({
                            country_ids: countryIds,
                            keyword_ids: keywordIds,
                            freeform_keywords: freeformKeywords,
                            start_year: startYear !== '' ? parseInt(startYear) : null,
                            end_year: endYear !== '' ? parseInt(endYear) : null
                        })
                    });

                    const data = await response.json();

                    if (data.success) {
                        console.log('Search results:', data.results);
                        test = transformToGoogleChartDataForCountries(data.results)
                        google.charts.load('current', {packages: ['corechart', 'line', 'bar']});
                        google.charts.setOnLoadCallback(drawChart);

                        // Update the UI with search results (e.g., display them in a table or list)
                    } else {
                        console.error('Search failed:', data.message);
                    }
                } catch (error) {
                    console.error('Error during search:', error);
                }
            });
        });

        function updatePreview(type, selectedArray) {
            const previewSpan = document.getElementById(`preview-${type}`);
            if (selectedArray.length === 0) {
                previewSpan.textContent = 'None';
            } else {
                previewSpan.textContent = selectedArray.map(i => i.name).join(', ');
            }

            const freeformInputField = document.getElementById('freeform-keywords');
            freeformInputField.addEventListener('input', () => {
                const preview = document.getElementById('preview-freeform');
                const keywords = freeformInputField.value.trim().split(',').map(k => k.trim()).filter(k => k.length > 0);
                preview.textContent = keywords.length ? keywords.join(', ') : 'None';
            });
        }

        function drawCountriesChart() {
            google.charts.load('current', {'packages':['bar']});

        }

        let test = [];

        function transformToGoogleChartDataForCountries(apiResponseResults) {
            // 1. Tüm yıl setini topla
            const allYearsSet = new Set();
            const countryMap = {};

            apiResponseResults.forEach(country => {
                const yearlyData = country.yearly_publication_counts;
                countryMap[country.country_name] = yearlyData;

                Object.keys(yearlyData).forEach(year => {
                    if (year && !isNaN(year)) {
                        allYearsSet.add(year);
                    }
                });
            });

            // 2. Yılları sıralı dizi haline getir
            const allYearsSorted = Array.from(allYearsSet).sort();

            // 3. Başlık satırını oluştur
            const headerRow = ['Year', ...Object.keys(countryMap)];

            // 4. Her yıl için satır oluştur
            const dataRows = allYearsSorted.map(year => {
                const row = [year];
                Object.keys(countryMap).forEach(countryName => {
                    const count = countryMap[countryName][year] || 0;
                    row.push(count);
                });
                return row;
            });

            // 5. Google Charts formatında veri döndür
            return [headerRow, ...dataRows];
        }


        function drawChart() {
            const options = {
                bars: 'vertical',
                vAxis: {format: 'decimal'},
                height: 400,
                colors: ['#1b9e77', '#d95f02', '#7570b3']
            };

            var chart = new google.charts.Bar(document.getElementById('chart_div'));
            var data = google.visualization.arrayToDataTable(test);

            chart.draw(data, google.charts.Bar.convertOptions(options));

        }

    </script>
@endsection