{#  DrCr: Web-based double-entry bookkeeping framework
    Copyright (C) 2022–2024  Lee Yingtong Li (RunasSudo)

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
#}

{% extends 'base.html' %}
{% block title %}{{ 'Edit' if transaction and transaction.id else 'New' }} transaction{% endblock %}

{# Macros for template posting rows as these are reused #}
{% macro template_dr() %}
	<tr>
		<td></td>
		{#<td></td>#}
		<td class="py-1 px-1" colspan="2">
			<div class="relative flex">
				<div class="relative flex flex-grow items-stretch shadow-sm">
					<div class="absolute inset-y-0 left-0 flex items-center z-10">
						<select class="h-full border-0 bg-transparent py-0 pl-2 pr-8 text-gray-900 focus:ring-2 focus:ring-inset focus:ring-indigo-600" name="sign" onchange="changeDrCr(this)">
							<option value="dr" selected>Dr</option>
							<option value="cr">Cr</option>
						</select>
					</div>
					<div class="relative combobox w-full">
						<input type="text" class="bordered-field pl-16 peer" name="account">
						{% include 'components/accounts_combobox_inner.html' %}
					</div>
				</div>
				<a class="relative -ml-px px-2 py-2 text-gray-500 hover:text-gray-700" href="#" onclick="addPosting(this);return false;">
					<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
						<path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
					</svg>
				</a>
			</div>
		</td>
		<td class="amount-dr has-amount py-1 px-1">
			<div class="relative shadow-sm">
				<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
					{# FIXME: Gracefully handle when the reporting commodity is not a single character #}
					<span class="text-gray-500">{{ reporting_commodity }}</span>
				</div>
				<input type="text" class="bordered-field pl-7" name="amount" oninput="changeAmount(this)">
			</div>
		</td>
		<td class="amount-cr py-1 pl-1"></td>
	</tr>
{% endmacro %}
{% macro template_cr() %}
	<tr>
		<td></td>
		{#<td></td>#}
		<td class="py-1 px-1" colspan="2">
			<div class="relative flex">
				<div class="relative flex flex-grow items-stretch shadow-sm">
					<div class="absolute inset-y-0 left-0 flex items-center z-10">
						<select class="h-full border-0 bg-transparent py-0 pl-2 pr-8 text-gray-900 focus:ring-2 focus:ring-inset focus:ring-indigo-600" name="sign" onchange="changeDrCr(this)">
							<option value="dr">Dr</option>
							<option value="cr" selected>Cr</option>
						</select>
					</div>
					<div class="relative combobox w-full">
						<input type="text" class="bordered-field pl-16 peer" name="account">
						{% include 'components/accounts_combobox_inner.html' %}
					</div>
				</div>
				<a class="relative -ml-px px-2 py-2 text-gray-500 hover:text-gray-700" href="#" onclick="addPosting(this);return false;">
					<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
						<path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
					</svg>
				</a>
			</div>
		</td>
		<td class="amount-dr py-1 px-1"></td>
		<td class="amount-cr has-amount py-1 pl-1">
			<div class="relative shadow-sm">
				<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
					<span class="text-gray-500">{{ reporting_commodity }}</span>
				</div>
				<input type="text" class="bordered-field pl-7" name="amount" oninput="changeAmount(this)">
			</div>
		</td>
	</tr>
{% endmacro %}

{% block content %}
	<h1 class="page-heading mb-4">
		{{ 'Edit' if transaction and transaction.id else 'New' }} transaction
	</h1>
	
	<form method="POST" id="edit-transaction-form">
		<table class="min-w-full">
			<thead>
				<tr class="border-b border-gray-300">
					<th class="pt-0.5 pb-1 pr-1 text-gray-900 font-semibold text-start">Date</th>
					<th class="pt-0.5 pb-1 px-1 text-gray-900 font-semibold text-start" colspan="2">Description</th>
					<th class="pt-0.5 pb-1 px-1 text-gray-900 font-semibold text-start">Dr</th>
					<th class="pt-0.5 pb-1 pl-1 text-gray-900 font-semibold text-start">Cr</th>
				</tr>
			</thead>
			<tbody>
				<tr>
					<td class="pt-2 pb-1 pr-1">
						<input type="date" class="bordered-field" name="dt" value="{{ transaction.dt.strftime('%Y-%m-%d') if transaction else '' }}">
					</td>
					<td class="pt-2 pb-1 px-1" colspan="2">
						<input type="text" class="bordered-field" name="description" value="{{ transaction.description if transaction else '' }}">
					</td>
					<td></td>
					<td></td>
				</tr>
				{% if transaction %}
					{% for posting in transaction.postings %}
						<tr>
							<td></td>
							{#<td></td>#}
							<td class="py-1 px-1" colspan="2">
								<div class="relative flex">
									<div class="relative flex flex-grow items-stretch shadow-sm">
										<div class="absolute inset-y-0 left-0 flex items-center z-10">
											<select class="h-full border-0 bg-transparent py-0 pl-2 pr-8 text-gray-900 focus:ring-2 focus:ring-inset focus:ring-indigo-600" name="sign" onchange="changeDrCr(this)">
												<option value="dr"{% if posting.quantity >= 0 %} selected{% endif %}>Dr</option>
												<option value="cr"{% if posting.quantity < 0 %} selected{% endif %}>Cr</option>
											</select>
										</div>
										<div class="relative combobox w-full">
											<input type="text" class="bordered-field pl-16 peer" name="account" value="{{ posting.account }}">
											{% include 'components/accounts_combobox_inner.html' %}
										</div>
									</div>
									<a class="relative -ml-px px-2 py-2 text-gray-500 hover:text-gray-700" href="#" onclick="addPosting(this);return false;">
										<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
											<path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
										</svg>
									</a>
								</div>
							</td>
							{% if posting.quantity >= 0 %}
								<td class="amount-dr has-amount py-1 px-1">
									<div class="relative shadow-sm">
										<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
											<span class="text-gray-500">{{ reporting_commodity }}</span>
										</div>
										<input type="text" class="bordered-field pl-7" name="amount" value="{{ posting.amount().quantity_string() }}" oninput="changeAmount(this)">
									</div>
								</td>
								<td class="amount-cr py-1 pl-1"></td>
							{% else %}
								<td class="amount-dr py-1 px-1"></td>
								<td class="amount-cr has-amount py-1 pl-1">
									<div class="relative shadow-sm">
										<div class="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
											<span class="text-gray-500">{{ reporting_commodity }}</span>
										</div>
										<input type="text" class="bordered-field pl-7" name="amount" value="{{ (posting.amount()|abs).quantity_string() }}" oninput="changeAmount(this)">
									</div>
								</td>
							{% endif %}
						</tr>
					{% endfor %}
				{% else %}
					{{ template_dr() }}
					{{ template_cr() }}
				{% endif %}
			</tbody>
		</table>
		
		<div class="flex justify-end mt-4 space-x-2">
			{% if transaction and transaction.id %}
				<button type="submit" name="action" value="delete" class="btn-secondary text-red-600 ring-red-500" onclick="return confirm('Are you sure you want to delete this transaction? This operation is irreversible.');">Delete</button>
			{% endif %}
			<button type="submit" class="btn-primary">Save</button>
		</div>
		
		<input type="hidden" name="referrer" value="{{ request.referrer or '' }}">
	</form>
	
	{# Save HTML for template posting rows so we can access this from JS when required #}
	<table style="display:none" id="template-dr">{{ template_dr() }}</table>
	<table style="display:none" id="template-cr">{{ template_cr() }}</table>
{% endblock %}

{% block scripts %}
	<script>
		function changeDrCr(el) {
			let trPosting = el.parentNode.parentNode.parentNode.parentNode.parentNode;
			let amountContent = trPosting.querySelector('.has-amount').innerHTML;
			let amountValue = trPosting.querySelector('.has-amount input').value;
			
			// Remove input boxes
			for (let td of trPosting.querySelectorAll('.amount-dr, .amount-cr')) {
				td.innerHTML = '';
				td.classList.remove('has-amount');
			}
			
			// Add correct input box
			let td = trPosting.querySelector(el.value === 'dr' ? '.amount-dr' : '.amount-cr');
			td.innerHTML = amountContent;
			td.classList.add('has-amount');
			td.querySelector('input').value = amountValue;
		}
		
		function addPosting(el) {
			let trPosting = el.parentNode.parentNode.parentNode;
			let sign = trPosting.querySelector('select').value; // Use same sign as row clicked
			
			// Add new posting row
			let trNew = document.createElement('tr');
			trNew.innerHTML = document.getElementById(sign === 'dr' ? 'template-dr' : 'template-cr').querySelector('tr').innerHTML;
			trPosting.after(trNew);
			
			// Initialise new combobox
			initCombobox(trNew.querySelector('.combobox'));
		}
		
		function changeAmount(el) {
			// Update linked postings if there are only 2 and the first is edited
			// This allows changing the second posting independently by editing it (e.g. mixing commodities of equivalent total value)
			let amountInputs = document.querySelectorAll('#edit-transaction-form input[name="amount"]');
			if (amountInputs.length === 2 && el === amountInputs[0]) {
				for (inp of amountInputs) {
					if (inp !== el) {
						// Update other input with amount
						inp.value = el.value;
					}
				}
			}
		}
	</script>
	<script src="{{ url_for('static', filename='js/combobox.js') }}"></script>
{% endblock %}