{% extends "base.html" %}

{% block title %}{% if renew %}续签{% elif contract %}编辑{% else %}新建{% endif %}合同{% endblock %}

{% block content %}
<div class="d-flex justify-content-between align-items-center mb-4">
    <h2 class="fw-bold">{% if renew %}续签{% elif contract %}编辑{% else %}新建{% endif %}合同</h2>
    <a href="{{ url_for('contract_list') }}" class="btn btn-outline-secondary">返回列表</a>
</div>

<div class="card shadow-sm">
    <div class="card-body">
        <form method="POST" enctype="multipart/form-data">
            <div class="row g-3">

                <!-- 合同类型 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">合同类型</label>
                    <select class="form-select" name="type_id" id="type-select" required>
                        <option value="">选择合同类型</option>
                        {% for type in contract_types %}
                        <option value="{{ type.id }}"
                            {% if contract and contract.type_id == type.id %}selected
                            {% elif renew and original_contract is defined and original_contract.type_id == type.id %}selected{% endif %}>
                            {{ type.name }}
                        </option>
                        {% endfor %}
                    </select>
                </div>

                <!-- 合同编号 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">合同编号</label>
                    {% if renew %}
                        <input type="text" class="form-control" name="contract_number" id="contract-number" value="自动生成" readonly>
                        <div class="form-text">续签时编号将在保存后自动生成</div>
                    {% else %}
                        <input type="text" class="form-control" name="contract_number" id="contract-number"
                               value="{{ contract.contract_number if contract else default_number }}" required>
                        <div class="form-text">系统已自动生成编号，您也可以自行修改</div>
                    {% endif %}
                </div>

                <!-- 合同名称 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">合同名称</label>
                    <input type="text" class="form-control" name="name"
                           value="{{ contract.name if contract else '' }}" required>
                </div>

                <!-- 我方主体 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">我方主体</label>
                    <select class="form-select" name="company_entity_id" required>
                        <option value="">选择我方主体</option>
                        {% for entity in company_entities %}
                        <option value="{{ entity.id }}"
                            {% if contract and contract.company_entity_id == entity.id %}selected
                            {% elif renew and original_contract is defined and original_contract.company_entity_id == entity.id %}selected{% endif %}>
                            {{ entity.name }}
                        </option>
                        {% endfor %}
                    </select>
                </div>

                <!-- 开始日期 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">开始日期</label>
                    <input type="date" class="form-control" id="start-date" name="start_date"
                           value="{{ contract.start_date.strftime('%Y-%m-%d') if contract else '' }}" required>
                </div>

                <!-- 结束日期 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">结束日期</label>
                    <input type="date" class="form-control" id="end-date" name="end_date"
                           value="{{ contract.end_date.strftime('%Y-%m-%d') if contract else '' }}" required>
                </div>

                <!-- 签约方式 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">签约方式</label>
                    {% set signing_method_value = contract.signing_method if contract else (original_contract.signing_method if renew and original_contract is defined else '纸质签') %}
                    <select class="form-select" name="signing_method" required>
                        <option value="纸质签" {% if signing_method_value == '纸质签' %}selected{% endif %}>纸质签</option>
                        <option value="电子签" {% if signing_method_value == '电子签' %}selected{% endif %}>电子签</option>
                        <option value="电子签+纸质签" {% if signing_method_value == '电子签+纸质签' %}selected{% endif %}>电子签+纸质签</option>
                    </select>
                </div>

                <!-- 合同收回时间 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">合同收回时间</label>
                    <input type="date" class="form-control" name="collected_date"
                           value="{{ contract.collected_date.strftime('%Y-%m-%d') if contract and contract.collected_date else (original_contract.collected_date.strftime('%Y-%m-%d') if renew and original_contract and original_contract.collected_date else '') }}">
                </div>

                <!-- 存储盒名称 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">存储盒名称</label>
                    <input type="text" class="form-control" name="storage_box"
                           value="{{ contract.storage_box if contract else (original_contract.storage_box if renew and original_contract is defined else '') }}">
                </div>

                <!-- 对方主体 -->
                <div class="col-12">
                    <label class="form-label fw-semibold">对方主体（可多个）</label>
                    <div id="counterparties-container">
                        {% set counterparties = contract.counterparties if contract else (original_contract.counterparties if renew and original_contract is defined else []) %}
                        {% if counterparties %}
                            {% for cp in counterparties %}
                            <div class="input-group mb-2">
                                <input type="text" class="form-control" name="counterparty_name" value="{{ cp.name }}">
                                <button type="button" class="btn btn-outline-danger remove-counterparty">删除</button>
                            </div>
                            {% endfor %}
                        {% else %}
                        <div class="input-group mb-2">
                            <input type="text" class="form-control" name="counterparty_name">
                            <button type="button" class="btn btn-outline-danger remove-counterparty">删除</button>
                        </div>
                        {% endif %}
                    </div>
                    <button type="button" id="add-counterparty" class="btn btn-sm btn-outline-secondary mt-1">添加对方主体</button>
                </div>

                <!-- 提前提醒天数 -->
                <div class="col-md-6">
                    <label class="form-label fw-semibold">到期前提醒（天）</label>
                    <input type="number" class="form-control" id="remind-before" name="remind_before"
                           value="{{ contract.remind_before if contract else 30 }}" min="1" max="365">
                </div>

                <!-- 备注 -->
                <div class="col-12">
                    <label class="form-label fw-semibold">备注</label>
                    <textarea class="form-control" name="notes" rows="3">{{ contract.notes if contract else '' }}</textarea>
                </div>

                <!-- 附件上传（已修复） -->
                <div class="col-12">
                    <label class="form-label fw-semibold">附件</label>
                    <input type="file" class="form-control" name="new_attachments" multiple
                           accept=".pdf,.jpg,.jpeg,.png,.gif,.bmp,.tiff,.webp,.doc,.docx,.xls,.xlsx,.ppt,.pptx">
                    <div class="form-text">仅支持 PDF、图片、Office 文件，单个不超过 5MB</div>

                    {% if attachments %}
                    <div class="mt-3">
                        <label class="form-label fw-semibold">已上传附件</label>
                        <ul class="list-group">
                            {% for att in attachments %}
                            <!-- 修改附件链接 -->
                            <li class="list-group-item d-flex justify-content-between align-items-center">
                                <div>
                                    <i class="bi bi-paperclip me-2"></i>
                                    <a href="#" onclick="previewAttachment('{{ url_for('download_file', attachment_id=att.id) }}', '{{ att.filename }}')">
                                        {{ att.filename }}
                                    </a>
                                </div>
                                <div>
                                    <input type="checkbox" name="delete_attachment" value="{{ att.id }}" class="form-check-input me-1">
                                    <label>删除</label>
                                </div>
                            </li>

                            {% endfor %}
                        </ul>
                    </div>
                    {% endif %}
                </div>

            </div>

            <!-- 提交按钮 -->
            <div class="d-grid gap-2 mt-4">
                <button type="submit" class="btn btn-primary btn-lg">{{ '续签合同' if renew else '保存合同' }}</button>
            </div>
        </form>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const typeSelect = document.getElementById('type-select');
    const contractInput = document.getElementById('contract-number');
    const startDateInput = document.getElementById('start-date');
    const endDateInput = document.getElementById('end-date');
    const fileInput = document.querySelector('input[name="new_attachments"]');
    const addCounterpartyBtn = document.getElementById('add-counterparty');
    const counterpartiesContainer = document.getElementById('counterparties-container');
    const form = document.querySelector('form');

    // 文件校验（支持 PDF、图片、Word、Excel、PowerPoint）
    function validateFileType(input) {
        const validTypes = [
            'application/pdf',
            'image/jpeg',
            'image/png',
            'image/gif',
            'image/bmp',
            'image/tiff',
            'image/webp',
            'application/msword',
            'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            'application/vnd.ms-excel',
            'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
            'application/vnd.openxmlformats-officedocument.presentationml.presentation'
        ];

        const files = input.files;
        for (let i = 0; i < files.length; i++) {
            if (!validTypes.includes(files[i].type)) {
                alert(`文件 "${files[i].name}" 不是有效的 PDF、图片、Word、Excel 或 PowerPoint 文件`);
                input.value = '';
                return false;
            }
            if (files[i].size > 5 * 1024 * 1024) { // 最大 5MB
                alert(`文件 "${files[i].name}" 超过 5MB`);
                input.value = '';
                return false;
            }
        }
        return true;
    }

    form.addEventListener('submit', function(e) {
        if (fileInput.files.length > 0 && !validateFileType(fileInput)) e.preventDefault();
    });
    fileInput.addEventListener('change', () => validateFileType(fileInput));

    // 合同编号自动生成
    async function updateContractNumber(typeId) {
        if (!typeId || contractInput.readOnly) return;
        try {
            const res = await fetch(`/contract/generate_number/${typeId}`);
            const data = await res.json();
            if (!contractInput.dataset.userEdited) contractInput.value = data.number;
        } catch (err) {
            console.error('获取合同编号失败', err);
        }
    }
    typeSelect.addEventListener('change', function() { updateContractNumber(this.value); });
    contractInput.addEventListener('input', function(){ this.dataset.userEdited='true'; });

    // 自动结束日期 = 开始日期 +1年
    startDateInput.addEventListener('change', () => {
        if (!endDateInput.value) {
            const startDate = new Date(startDateInput.value);
            if (!isNaN(startDate)) {
                startDate.setFullYear(startDate.getFullYear() + 1);
                endDateInput.value = startDate.toISOString().split('T')[0];
            }
        }
    });

    // 对方主体增删
    function addCounterpartyField(value='') {
        const div = document.createElement('div');
        div.className = 'input-group mb-2';
        div.innerHTML = `<input type="text" class="form-control" name="counterparty_name" value="${value}"><button type="button" class="btn btn-outline-danger remove-counterparty">删除</button>`;
        counterpartiesContainer.appendChild(div);
    }
    addCounterpartyBtn.addEventListener('click', () => addCounterpartyField());
    counterpartiesContainer.addEventListener('click', function(e) {
        if (e.target.classList.contains('remove-counterparty')) e.target.parentElement.remove();
    });
});
</script>
{% endblock %}