@extends('layouts.app')

@section('content')
<div class="container-fluid">
    <div class="row mb-4">
        <div class="col-12">
            <div class="d-flex justify-content-between align-items-center">
                <div>
                    <h1 class="h3 mb-2">Import Theme</h1>
                    <p class="text-muted">Upload a theme JSON file to import</p>
                </div>
                <div>
                    <a href="{{ route('admin.theme-builder.index') }}" class="btn btn-outline-secondary">
                        <i class="bi bi-arrow-left me-1"></i> Back to Themes
                    </a>
                </div>
            </div>
        </div>
    </div>

    @if(session('success'))
        <div class="alert alert-success alert-dismissible fade show" role="alert">
            {{ session('success') }}
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
        </div>
    @endif

    @if(session('error'))
        <div class="alert alert-danger alert-dismissible fade show" role="alert">
            {{ session('error') }}
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
        </div>
    @endif

    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card shadow-sm">
                <div class="card-body p-4">
                    <div class="text-center mb-4">
                        <i class="bi bi-cloud-upload fs-1 text-primary mb-3 d-block"></i>
                        <h5>Upload Theme File</h5>
                        <p class="text-muted">Select a theme JSON file exported from another system</p>
                    </div>

                    <form id="importForm" enctype="multipart/form-data">
                        @csrf

                        <div class="mb-4">
                            <label for="theme_file" class="form-label">Theme File</label>
                            <input type="file" class="form-control" id="theme_file" name="theme_file" accept=".json" required>
                            <div class="form-text">
                                Maximum file size: 50MB. Only JSON files are accepted.
                            </div>
                        </div>

                        <div class="mb-4" id="validationResults" style="display: none;">
                            <div class="card bg-light">
                                <div class="card-body">
                                    <h6 class="card-title mb-3">Theme Information</h6>
                                    <div id="themeInfo"></div>
                                </div>
                            </div>
                        </div>

                        <div class="mb-4" id="overwriteSection" style="display: none;">
                            <div class="alert alert-warning">
                                <i class="bi bi-exclamation-triangle me-2"></i>
                                <strong>Theme Already Exists</strong>
                                <p class="mb-2">A theme with this slug already exists in the system.</p>
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="overwrite" name="overwrite" value="1">
                                    <label class="form-check-label" for="overwrite">
                                        <strong>Overwrite existing theme</strong>
                                        <br>
                                        <small class="text-muted">This will delete the existing theme and all its data before importing.</small>
                                    </label>
                                </div>
                            </div>
                        </div>

                        <div id="errorSection" style="display: none;">
                            <div class="alert alert-danger">
                                <h6 class="alert-heading">Validation Errors</h6>
                                <ul id="errorList" class="mb-0"></ul>
                            </div>
                        </div>

                        <div class="d-grid gap-2">
                            <button type="button" class="btn btn-primary btn-lg" id="validateBtn" onclick="validateFile()">
                                <i class="bi bi-check-circle me-2"></i>Validate Theme File
                            </button>
                            <button type="button" class="btn btn-success btn-lg" id="importBtn" onclick="importTheme()" style="display: none;" disabled>
                                <i class="bi bi-upload me-2"></i>Import Theme
                            </button>
                        </div>
                    </form>
                </div>
            </div>

            <div class="card shadow-sm mt-4">
                <div class="card-body">
                    <h6 class="card-title mb-3">
                        <i class="bi bi-info-circle me-2"></i>Import Instructions
                    </h6>
                    <ol class="mb-0">
                        <li class="mb-2">Select a theme JSON file that was exported from this or another Neosolvix system</li>
                        <li class="mb-2">Click "Validate Theme File" to check if the file is valid and see theme information</li>
                        <li class="mb-2">If validation passes, the "Import Theme" button will become available</li>
                        <li class="mb-2">If a theme with the same slug exists, check "Overwrite existing theme" to replace it</li>
                        <li>Click "Import Theme" to complete the import process</li>
                    </ol>
                </div>
            </div>
        </div>
    </div>
</div>

@push('scripts')
<script>
let isValidated = false;
let themeExists = false;

function validateFile() {
    const fileInput = document.getElementById('theme_file');
    const file = fileInput.files[0];

    if (!file) {
        alert('Please select a file first');
        return;
    }

    // Show loading state
    const validateBtn = document.getElementById('validateBtn');
    validateBtn.disabled = true;
    validateBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Validating...';

    // Clear previous results
    document.getElementById('validationResults').style.display = 'none';
    document.getElementById('overwriteSection').style.display = 'none';
    document.getElementById('errorSection').style.display = 'none';
    document.getElementById('importBtn').style.display = 'none';

    const formData = new FormData();
    formData.append('theme_file', file);

    fetch('{{ route('admin.theme-builder.import-validate') }}', {
        method: 'POST',
        headers: {
            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
            'Accept': 'application/json'
        },
        body: formData
    })
    .then(response => {
        // Check if response is JSON before parsing
        const contentType = response.headers.get('content-type');
        if (!contentType || !contentType.includes('application/json')) {
            throw new Error('Server returned non-JSON response. Please check server logs.');
        }

        return response.json();
    })
    .then(data => {
        if (data.valid) {
            // Show theme information
            const info = data.info;
            themeExists = info.exists;

            const infoHtml = `
                <div class="row">
                    <div class="col-md-6 mb-2">
                        <strong>Name:</strong> ${info.name}
                    </div>
                    <div class="col-md-6 mb-2">
                        <strong>Version:</strong> ${info.version}
                    </div>
                    <div class="col-md-6 mb-2">
                        <strong>Slug:</strong> ${info.slug}
                    </div>
                    <div class="col-md-6 mb-2">
                        <strong>Author:</strong> ${info.author}
                    </div>
                    <div class="col-md-4 mb-2">
                        <strong>Components:</strong> ${info.components_count}
                    </div>
                    <div class="col-md-4 mb-2">
                        <strong>Presets:</strong> ${info.presets_count}
                    </div>
                    <div class="col-md-4 mb-2">
                        <strong>Pages:</strong> ${info.pages_count}
                    </div>
                </div>
            `;

            document.getElementById('themeInfo').innerHTML = infoHtml;
            document.getElementById('validationResults').style.display = 'block';

            if (themeExists) {
                document.getElementById('overwriteSection').style.display = 'block';
            }

            // Show import button
            const importBtn = document.getElementById('importBtn');
            importBtn.style.display = 'block';
            importBtn.disabled = false;
            isValidated = true;

        } else {
            // Show errors
            const errorList = document.getElementById('errorList');
            errorList.innerHTML = data.errors.map(error => `<li>${error}</li>`).join('');
            document.getElementById('errorSection').style.display = 'block';
            isValidated = false;
        }

        // Reset validate button
        validateBtn.disabled = false;
        validateBtn.innerHTML = '<i class="bi bi-check-circle me-2"></i>Validate Theme File';
    })
    .catch(error => {
        console.error('Error:', error);
        alert('An error occurred while validating the file: ' + error.message);
        validateBtn.disabled = false;
        validateBtn.innerHTML = '<i class="bi bi-check-circle me-2"></i>Validate Theme File';
    });
}

function importTheme() {
    if (!isValidated) {
        alert('Please validate the file first');
        return;
    }

    if (themeExists) {
        const overwriteCheckbox = document.getElementById('overwrite');
        if (!overwriteCheckbox.checked) {
            alert('Please check the "Overwrite existing theme" option to proceed with importing an existing theme.');
            return;
        }
    }

    const fileInput = document.getElementById('theme_file');
    const file = fileInput.files[0];

    if (!file) {
        alert('Please select a file first');
        return;
    }

    // Show loading state
    const importBtn = document.getElementById('importBtn');
    importBtn.disabled = true;
    importBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Importing...';

    const formData = new FormData();
    formData.append('theme_file', file);
    formData.append('overwrite', themeExists && document.getElementById('overwrite').checked ? '1' : '0');

    fetch('{{ route('admin.theme-builder.import') }}', {
        method: 'POST',
        headers: {
            'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content,
            'Accept': 'application/json'
        },
        body: formData
    })
    .then(response => {
        // Check if response is JSON before parsing
        const contentType = response.headers.get('content-type');
        if (!contentType || !contentType.includes('application/json')) {
            throw new Error('Server returned non-JSON response. Please check server logs.');
        }

        // Check if response is OK
        if (!response.ok) {
            return response.json().then(err => {
                throw new Error(err.message || 'Import failed');
            });
        }

        return response.json();
    })
    .then(data => {
        if (data.success) {
            alert('Theme imported successfully!');
            window.location.href = data.redirect;
        } else {
            alert('Failed to import theme: ' + data.message);
            importBtn.disabled = false;
            importBtn.innerHTML = '<i class="bi bi-upload me-2"></i>Import Theme';
        }
    })
    .catch(error => {
        console.error('Error:', error);
        alert('An error occurred while importing the theme: ' + error.message);
        importBtn.disabled = false;
        importBtn.innerHTML = '<i class="bi bi-upload me-2"></i>Import Theme';
    });
}

// Reset validation when file changes
document.getElementById('theme_file').addEventListener('change', function() {
    isValidated = false;
    document.getElementById('validationResults').style.display = 'none';
    document.getElementById('overwriteSection').style.display = 'none';
    document.getElementById('errorSection').style.display = 'none';
    document.getElementById('importBtn').style.display = 'none';
});
</script>
@endpush
@endsection