{% extends "base.html" %}
{% block title %}{% if postcard %}{{ 'pc_form.edit'|t(user.language) }}{% else %}{% if create_type == 'received' %}{{ 'pc_form.new_received'|t(user.language) }}{% else %}{{ 'pc_form.new_sent'|t(user.language) }}{% endif %}{% endif %} - {{ 'brand'|t(user.language) }}{% endblock %}
{% block content %}
<div class="section-header">
    <h1>{% if postcard %}{{ 'pc_form.edit'|t(user.language) }}{% else %}{% if create_type == 'received' %}{{ 'pc_form.new_received'|t(user.language) }}{% else %}{{ 'pc_form.new_sent'|t(user.language) }}{% endif %}{% endif %}</h1>
</div>

{% if error %}<div class="form-card" style="border-left:3px solid var(--danger);margin-bottom:1rem;padding:.75rem 1rem;color:var(--danger)">{{ error }}</div>{% endif %}

{% set is_new = (postcard is none) %}
{% set is_edit = (postcard is not none) %}
{% set edit_status = postcard.status if is_edit else '' %}
{% set is_received_form = (create_type == 'received' and is_new) or (is_edit and edit_status == 'received') %}

<form method="post" action="{{ '/postcards/%d/edit' % postcard.id if is_edit else '/profiles/%d/postcards' % profile.id }}" class="form-card">
    <label>{{ 'pc_form.number'|t(user.language) }} *</label>
    <input type="text" name="card_number" value="{{ postcard.card_number if is_edit else '' }}" required>

    {% if is_received_form %}
    {# ── 收到表单：无状态选择 ── #}
    <input type="hidden" name="status" value="received">

    <label>{{ 'pc_form.sender'|t(user.language) }} *</label>
    <input type="text" name="sender_name" value="{{ postcard.sender_name if is_edit else '' }}">

    <label>{{ 'pc_form.receive_time'|t(user.language) }} *</label>
    <input type="date" name="receive_time" value="{{ postcard.receive_time.strftime('%Y-%m-%d') if is_edit and postcard.receive_time else today }}">

    <label>{{ 'pc_form.country'|t(user.language) }}</label>
    <input type="text" name="country_to" value="{{ postcard.country_to if is_edit and postcard.country_to else (profile.country if profile else '') }}" maxlength="2" placeholder="JP" style="width:80px;text-transform:uppercase" oninput="this.value=this.value.toUpperCase()">

    <label>{{ 'pc_form.country_from'|t(user.language) }}</label>
    <input type="text" name="country_from" value="{{ postcard.country_from if is_edit and postcard.country_from else '' }}" maxlength="2" style="width:80px;text-transform:uppercase" oninput="this.value=this.value.toUpperCase()">

    {% else %}
    {# ── 寄出表单 ── #}
    {% if is_new %}
    {# 新建寄出：状态默认由日期自动判定，可手动覆盖 #}
    <label>{{ 'pc_form.status'|t(user.language) }}</label>
    <select name="status" id="status-select">
        <option value="pending">{{ 'status.pending'|t(user.language) }}</option>
        <option value="sent">{{ 'status.sent'|t(user.language) }}</option>
        <option value="delivered">{{ 'status.delivered'|t(user.language) }}</option>
    </select>
    {% else %}
    {# 编辑时：显示状态选择 #}
    <label>{{ 'pc_form.status'|t(user.language) }} *</label>
    <select name="status" id="status-select" onchange="toggleFields()" required>
        <option value="pending" {% if edit_status=='pending' %}selected{% endif %}>{{ 'status.pending'|t(user.language) }}</option>
        <option value="sent" {% if edit_status=='sent' %}selected{% endif %}>{{ 'status.sent'|t(user.language) }}</option>
        <option value="delivered" {% if edit_status=='delivered' %}selected{% endif %}>{{ 'status.delivered'|t(user.language) }}</option>
    </select>
    {% endif %}

    <div id="fields-sent-delivered">
        <label>{{ 'pc_form.recipient'|t(user.language) }} *</label>
        <input type="text" name="recipient_name" value="{{ postcard.recipient_name if is_edit else '' }}">
        <label>{{ 'pc_form.send_time'|t(user.language) }} *</label>
        <input type="date" name="send_time" id="input-send-time" value="{{ postcard.send_time.strftime('%Y-%m-%d') if is_edit and postcard.send_time else (today if is_new else '') }}">
        <label id="label-arrival">{{ 'pc_form.arrival_time'|t(user.language) }}</label>
        <input type="date" name="arrival_time" id="input-arrival" value="{{ postcard.arrival_time.strftime('%Y-%m-%d') if is_edit and postcard.arrival_time else '' }}" {% if is_new or (is_edit and edit_status=='sent') %}disabled{% endif %}>
    </div>

    <label>{{ 'pc_form.country_from'|t(user.language) }}</label>
    <input type="text" name="country_from" value="{{ postcard.country_from if is_edit and postcard.country_from else (profile.country if profile else '') }}" maxlength="2" style="width:80px;text-transform:uppercase" oninput="this.value=this.value.toUpperCase()">

    <label>{{ 'pc_form.country'|t(user.language) }}</label>
    <input type="text" name="country_to" value="{{ postcard.country_to if is_edit and postcard.country_to else '' }}" maxlength="2" placeholder="JP" style="width:80px;text-transform:uppercase" oninput="this.value=this.value.toUpperCase()">

    {% endif %}

    <label>{{ 'pc_form.notes'|t(user.language) }}</label>
    <textarea name="notes" rows="3" placeholder="{{ 'pc_form.notes_ph'|t(user.language) }}">{{ postcard.notes if is_edit else '' }}</textarea>

    <div class="form-actions">
        <button type="submit" class="btn btn-primary">{{ 'pc_form.save'|t(user.language) }}</button>
        <a href="/profiles/{{ profile.id }}/postcards" class="btn">{{ 'pc_form.cancel'|t(user.language) }}</a>
    </div>
</form>
<script>
{% if is_new and not is_received_form %}
// ── 新建寄出：根据日期自动判定状态，可手动覆盖 ──
(function() {
    var sendTime = document.getElementById('input-send-time');
    var select = document.getElementById('status-select');
    var arrival = document.getElementById('input-arrival');
    var labelArrival = document.getElementById('label-arrival');
    var today = new Date().toISOString().slice(0, 10);
    if (!sendTime.value) sendTime.value = today;

    var userOverrode = false;

    function autoFromSendTime() {
        var v = sendTime.value;
        if (!v) return 'sent';
        return v > today ? 'pending' : 'sent';
    }

    function updateArrival(s) {
        if (s === 'delivered') {
            arrival.disabled = false;
            arrival.value = arrival.value || today;
            labelArrival.textContent = '{{ "pc_form.arrival_time"|t(user.language) }} *';
        } else {
            arrival.disabled = true;
            arrival.value = '';
            labelArrival.textContent = '{{ "pc_form.arrival_time"|t(user.language) }}';
        }
    }

    function sync() {
        var auto = autoFromSendTime();
        if (!userOverrode) select.value = auto;
        updateArrival(select.value);
    }

    select.addEventListener('change', function() { userOverrode = true; updateArrival(select.value); });
    sendTime.addEventListener('change', function() { if (!userOverrode) sync(); });
    sendTime.addEventListener('input', function() { if (!userOverrode) sync(); });
    sync();
})();
{% elif is_edit and not is_received_form %}
// ── 编辑寄出：根据状态切换 arrival 可用性 ──
function toggleFields() {
    var s = document.getElementById('status-select').value;
    var arrival = document.getElementById('input-arrival');
    var labelArrival = document.getElementById('label-arrival');
    if (s === 'delivered') {
        arrival.disabled = false;
        labelArrival.textContent = '{{ "pc_form.arrival_time"|t(user.language) }} *';
    } else {
        arrival.disabled = true;
        arrival.value = '';
        labelArrival.textContent = '{{ "pc_form.arrival_time"|t(user.language) }}';
    }
}
toggleFields();
{% endif %}
{% if is_new and is_received_form %}
// ── 新建收到：自动填日期 ──
(function() {
    var today = new Date().toISOString().slice(0, 10);
    var rt = document.querySelector('input[name="receive_time"]');
    if (rt && !rt.value) rt.value = today;
})();
{% endif %}
</script>
{% endblock %}