{# Phone input component with country code selector, flags, dynamic placeholder, and auto-formatting.
   Usage: {% include "components/phone_input.html" %}
   Expects: name, value (optional), id (optional)
#}
<div class="phone-input-wrapper" id="phoneWrapper">
    <label for="contact_phone_input" class="block text-sm font-medium text-gray-700 mb-1">Contact Phone</label>
    <div class="flex rounded-lg border border-gray-300 overflow-hidden focus-within:ring-2 focus-within:ring-accent focus-within:border-transparent transition">
        <!-- Country selector button -->
        <button type="button" id="phoneCountryBtn"
                class="flex items-center gap-1.5 px-3 bg-gray-50 border-r border-gray-300 hover:bg-gray-100 transition text-sm flex-shrink-0"
                onclick="togglePhoneDropdown()">
            <span id="phoneFlag" class="text-lg leading-none">🇺🇸</span>
            <span id="phoneDialCode" class="text-gray-700 font-medium">+1</span>
            <svg class="w-3 h-3 text-gray-500 ml-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
            </svg>
        </button>

        <!-- Hidden input for actual phone value (with dial code) -->
        <input type="hidden" name="contact_phone" id="phoneHidden" value="{{ phone_value|default('') }}">

        <!-- Visible phone display -->
        <input type="tel" id="phoneDisplay"
               class="flex-1 px-3 py-2.5 outline-none bg-white text-sm min-w-0"
               placeholder="(555) 123-4567"
               autocomplete="tel"
               oninput="formatPhoneInput(this)"
               onfocus="formatPhoneInput(this)">
    </div>

    <!-- Dropdown -->
    <div id="phoneDropdown"
         class="hidden absolute z-50 mt-1 w-72 bg-white border border-gray-200 rounded-xl shadow-xl max-h-64 overflow-y-auto">
    </div>
</div>

<script>
(function() {
    const COUNTRIES = [
        { code: 'US', flag: '🇺🇸', dial: '+1',    name: 'United States',  format: '(###) ###-####',   digitCount: 10 },
        { code: 'CA', flag: '🇨🇦', dial: '+1',    name: 'Canada',         format: '(###) ###-####',   digitCount: 10 },
        { code: 'GB', flag: '🇬🇧', dial: '+44',   name: 'United Kingdom', format: '#### ######',      digitCount: 10 },
        { code: 'AU', flag: '🇦🇺', dial: '+61',   name: 'Australia',      format: '#### ### ###',     digitCount: 9  },
        { code: 'CN', flag: '🇨🇳', dial: '+86',   name: 'China',          format: '### #### ####',    digitCount: 11 },
        { code: 'JP', flag: '🇯🇵', dial: '+81',   name: 'Japan',          format: '##-####-####',     digitCount: 10 },
        { code: 'KR', flag: '🇰🇷', dial: '+82',   name: 'South Korea',    format: '##-####-####',     digitCount: 10 },
        { code: 'DE', flag: '🇩🇪', dial: '+49',   name: 'Germany',        format: '### ########',     digitCount: 11 },
        { code: 'FR', flag: '🇫🇷', dial: '+33',   name: 'France',         format: '# ## ## ## ##',    digitCount: 9  },
        { code: 'IN', flag: '🇮🇳', dial: '+91',   name: 'India',          format: '##### #####',      digitCount: 10 },
        { code: 'BR', flag: '🇧🇷', dial: '+55',   name: 'Brazil',         format: '## #####-####',    digitCount: 11 },
        { code: 'MX', flag: '🇲🇽', dial: '+52',   name: 'Mexico',         format: '## #### ####',     digitCount: 10 },
        { code: 'SG', flag: '🇸🇬', dial: '+65',   name: 'Singapore',      format: '#### ####',        digitCount: 8  },
        { code: 'HK', flag: '🇭🇰', dial: '+852',  name: 'Hong Kong(China)',      format: '#### ####',        digitCount: 8  },
        { code: 'TW', flag: '🇹🇼', dial: '+886',  name: 'Taiwan(China)',         format: '## ### ####',      digitCount: 9  },
    ];

    let selectedCountry = COUNTRIES[0]; // Default: US
    let rawDigits = '';

    // Parse initial value
    const hiddenInput = document.getElementById('phoneHidden');
    const displayInput = document.getElementById('phoneDisplay');
    if (hiddenInput.value) {
        for (const c of COUNTRIES) {
            if (hiddenInput.value.startsWith(c.dial)) {
                selectedCountry = c;
                rawDigits = hiddenInput.value.replace(c.dial, '').replace(/\D/g, '');
                break;
            }
        }
        if (!rawDigits && hiddenInput.value) {
            rawDigits = hiddenInput.value.replace(/\D/g, '');
        }
    }

    function updateDisplay() {
        document.getElementById('phoneFlag').textContent = selectedCountry.flag;
        document.getElementById('phoneDialCode').textContent = selectedCountry.dial;
        displayInput.placeholder = formatDigits('', selectedCountry);
        displayInput.value = formatDigits(rawDigits, selectedCountry);
        hiddenInput.value = rawDigits.length > 0 ? selectedCountry.dial + rawDigits : '';
    }

    function formatDigits(digits, country) {
        if (!digits) return '';
        let result = '';
        let di = 0;
        for (let i = 0; i < country.format.length && di < digits.length; i++) {
            if (country.format[i] === '#') {
                result += digits[di++];
            } else {
                result += country.format[i];
            }
        }
        return result;
    }

    window.formatPhoneInput = function(input) {
        const cursorPos = input.selectionStart;
        const prevLength = input.value.length;
        rawDigits = input.value.replace(/\D/g, '').substring(0, selectedCountry.digitCount);
        updateDisplay();
        // Restore approximate cursor position
        const newLength = input.value.length;
        const newPos = cursorPos + (newLength - prevLength);
        input.setSelectionRange(newPos, newPos);
    };

    window.togglePhoneDropdown = function() {
        const dd = document.getElementById('phoneDropdown');
        dd.classList.toggle('hidden');
        if (!dd.classList.contains('hidden')) {
            renderDropdown();
        }
    };

    window.selectCountry = function(code) {
        selectedCountry = COUNTRIES.find(c => c.code === code);
        rawDigits = rawDigits.substring(0, selectedCountry.digitCount);
        updateDisplay();
        document.getElementById('phoneDropdown').classList.add('hidden');
    };

    function renderDropdown() {
        const dd = document.getElementById('phoneDropdown');
        dd.innerHTML = COUNTRIES.map(c => `
            <button type="button"
                    onclick="selectCountry('${c.code}')"
                    class="w-full flex items-center gap-3 px-3 py-2.5 hover:bg-accent/5 transition text-left
                    ${c.code === selectedCountry.code ? 'bg-accent/10' : ''}">
                <span class="text-xl">${c.flag}</span>
                <span class="text-sm font-medium text-gray-700">${c.name}</span>
                <span class="text-sm text-gray-500 ml-auto">${c.dial}</span>
            </button>
        `).join('');
    }

    // Close dropdown on outside click
    document.addEventListener('click', function(e) {
        const wrapper = document.getElementById('phoneWrapper');
        if (!wrapper.contains(e.target)) {
            document.getElementById('phoneDropdown').classList.add('hidden');
        }
    });

    // Initial render
    updateDisplay();
})();
</script>