{{template "base" .}}

{{define "content"}}
<div class="d-flex justify-content-between align-items-center mb-3">
    <h4 class="mb-0 fw-bold"><i class="bi bi-list-task me-2" aria-hidden="true"></i>課題一覧</h4>
    <div class="d-flex gap-2">
        <button class="btn btn-sm btn-secondary text-white" onclick="toggleCountdown()" id="toggleCountdownBtn" aria-pressed="false">
            <i class="bi bi-clock me-1" aria-hidden="true"></i><span id="countdownBtnText">カウントダウンを非表示</span>
        </button>
        <a href="/assignments/new" class="btn btn-sm btn-primary">
            <i class="bi bi-plus-lg me-1" aria-hidden="true"></i>新規登録
        </a>
    </div>
</div>

<ul class="nav nav-tabs border-0 mb-2" id="assignmentTabs" role="tablist">
    <li class="nav-item" role="presentation">
        <a class="nav-link py-2 rounded-0 {{if eq .filter "pending"}}fw-bold border-bottom border-dark border-3 text-dark{{else}}border-0 text-muted{{end}}"
            href="/assignments?filter=pending&q={{.query}}&priority={{.priority}}">未完了</a>
    </li>
    <li class="nav-item" role="presentation">
        <a class="nav-link py-2 rounded-0 {{if eq .filter "due_today"}}fw-bold border-bottom border-dark border-3 text-dark{{else}}border-0 text-muted{{end}}"
            href="/assignments?filter=due_today&q={{.query}}&priority={{.priority}}">今日が期限</a>
    </li>
    <li class="nav-item" role="presentation">
        <a class="nav-link py-2 rounded-0 {{if eq .filter "due_this_week"}}fw-bold border-bottom border-dark border-3 text-dark{{else}}border-0 text-muted{{end}}"
            href="/assignments?filter=due_this_week&q={{.query}}&priority={{.priority}}">今週が期限</a>
    </li>
    <li class="nav-item" role="presentation">
        <a class="nav-link py-2 rounded-0 {{if eq .filter "completed"}}fw-bold border-bottom border-dark border-3 text-dark{{else}}border-0 text-muted{{end}}"
            href="/assignments?filter=completed&q={{.query}}&priority={{.priority}}">完了済み</a>
    </li>
    <li class="nav-item" role="presentation">
        <a class="nav-link py-2 rounded-0 {{if eq .filter "overdue"}}fw-bold border-bottom border-dark border-3 text-dark{{else}}border-0 text-muted{{end}}"
            href="/assignments?filter=overdue&q={{.query}}&priority={{.priority}}">期限切れ</a>
    </li>
    <li class="nav-item ms-auto" role="presentation">
        <a class="nav-link py-2 rounded-0 border-0 text-muted" href="/recurring">
            <i class="bi bi-arrow-repeat me-1" aria-hidden="true"></i>繰り返し管理
        </a>
    </li>
</ul>
<hr class="mt-0 mb-3 text-muted" style="opacity: 0.1;">

<form action="/assignments" method="GET" class="row g-2 mb-3 align-items-center" role="search">
    <input type="hidden" name="filter" value="{{.filter}}">
    <div class="col-md-5">
        <div class="input-group input-group-sm">
            <span class="input-group-text bg-white border-end-0 text-muted"><i class="bi bi-search" aria-hidden="true"></i></span>
            <label for="searchInput" class="visually-hidden">課題を検索</label>
            <input type="text" class="form-control border-start-0 ps-0 bg-white" id="searchInput" name="q" placeholder="検索..." value="{{.query}}">
        </div>
    </div>
    <div class="col-md-4">
        <label for="priorityFilter" class="visually-hidden">重要度で絞り込み</label>
        <select class="form-select form-select-sm bg-white" id="priorityFilter" name="priority" onchange="this.form.submit()">
            <option value="">全ての重要度</option>
            <option value="high"   {{if eq .priority "high"  }}selected{{end}}>高</option>
            <option value="medium" {{if eq .priority "medium"}}selected{{end}}>中</option>
            <option value="low"    {{if eq .priority "low"   }}selected{{end}}>低</option>
        </select>
    </div>
    <div class="col-md-3">
        <a href="/assignments?filter={{.filter}}" class="btn btn-sm btn-outline-secondary w-100 bg-white">クリア</a>
    </div>
</form>

<div class="card shadow-sm border-0 rounded-0">
    <div class="card-body p-0">
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0 custom-table" aria-label="課題一覧">
                <thead class="bg-secondary-subtle">
                    <tr>
                        <th scope="col" style="width: 50px;" class="ps-3 text-center text-dark fw-bold">状態</th>
                        <th scope="col" style="width: 120px;" class="text-dark fw-bold">科目</th>
                        <th scope="col" style="width: 80px;" class="text-dark fw-bold">重要度</th>
                        <th scope="col" class="text-dark fw-bold">タイトル</th>
                        <th scope="col" style="width: 140px;" class="text-dark fw-bold">期限</th>
                        <th scope="col" style="width: 120px;" class="countdown-col text-dark fw-bold">残り</th>
                        <th scope="col" style="width: 80px;" class="text-end pe-3 text-dark fw-bold">操作</th>
                    </tr>
                </thead>
                <tbody>
                    {{range .assignments}}
                    <tr class="assignment-row border-bottom" data-due-ts="{{.DueDate.Unix}}" data-completed="{{.IsCompleted}}">
                        <td class="ps-3 text-center">
                            {{if .IsCompleted}}
                            <form action="/assignments/{{.ID}}/toggle" method="POST" class="d-inline">
                                <input type="hidden" name="_csrf" value="{{$.csrfToken}}">
                                <button type="submit" class="btn btn-link p-0 text-success text-decoration-none btn-touch" aria-label="未完了に戻す">
                                    <i class="bi bi-check-circle-fill" aria-hidden="true"></i>
                                </button>
                            </form>
                            {{else}}
                            <form action="/assignments/{{.ID}}/toggle" method="POST" class="d-inline">
                                <input type="hidden" name="_csrf" value="{{$.csrfToken}}">
                                <button type="submit" class="btn btn-link p-0 text-secondary text-decoration-none btn-touch" aria-label="完了にする">
                                    <i class="bi bi-circle" aria-hidden="true"></i>
                                </button>
                            </form>
                            {{end}}
                        </td>
                        <td><span class="badge bg-secondary text-white border-0 fw-bold">{{.Subject}}</span></td>
                        <td>
                            {{if eq .Priority "high"}}
                            <span class="badge bg-danger text-white border-0 fw-bold small">高<span class="visually-hidden">（重要度：高）</span></span>
                            {{else if eq .Priority "medium"}}
                            <span class="badge bg-warning text-dark border-0 fw-bold small">中<span class="visually-hidden">（重要度：中）</span></span>
                            {{else}}
                            <span class="badge bg-dark text-white border-0 fw-bold small">低<span class="visually-hidden">（重要度：低）</span></span>
                            {{end}}
                        </td>
                        <td>
                            <div class="d-flex align-items-center">
                                <div class="fw-bold text-dark text-truncate" style="max-width: 280px;">{{.Title}}</div>
                                {{if .RecurringAssignmentID}}
                                <button type="button" class="btn btn-link p-0 ms-2 text-info btn-touch" data-bs-toggle="modal"
                                    data-bs-target="#recurringModal"
                                    data-recurring-id="{{.RecurringAssignmentID}}"
                                    data-assignment-id="{{.ID}}"
                                    data-recurring-title="{{.Title}}"
                                    data-recurring-type="{{if .RecurringAssignment}}{{.RecurringAssignment.RecurrenceType}}{{else}}unknown{{end}}"
                                    data-recurring-active="{{if .RecurringAssignment}}{{.RecurringAssignment.IsActive}}{{else}}true{{end}}"
                                    aria-label="繰り返し設定を表示">
                                    <i class="bi bi-repeat" aria-hidden="true"></i>
                                </button>
                                {{end}}
                            </div>
                        </td>
                        <td>
                            <div class="small fw-bold text-dark user-select-all">{{.DueDate.Format "2006/01/02 15:04"}}</div>
                        </td>
                        <td class="countdown-col">
                            {{if not .IsCompleted}}
                            <span class="countdown small fw-bold font-monospace text-dark" aria-live="off">...</span>
                            {{else}}
                            <span class="text-secondary small fw-bold">-</span>
                            {{end}}
                        </td>
                        <td class="text-end pe-3">
                            <div class="d-flex justify-content-end gap-2">
                                <a href="/assignments/{{.ID}}/edit" class="text-primary text-decoration-none btn-touch d-inline-flex align-items-center" aria-label="編集">
                                    <i class="bi bi-pencil-fill" aria-hidden="true"></i>
                                </a>
                                {{if .RecurringAssignment}}
                                <button type="button" class="btn btn-link p-0 text-danger text-decoration-none border-0 bg-transparent btn-touch" onclick="showDeleteRecurringModal({{.ID}}, {{.RecurringAssignmentID}})" aria-label="削除">
                                    <i class="bi bi-trash-fill" aria-hidden="true"></i>
                                </button>
                                {{else}}
                                <form action="/assignments/{{.ID}}/delete" method="POST" class="d-inline" data-confirm="削除しますか？">
                                    <input type="hidden" name="_csrf" value="{{$.csrfToken}}">
                                    <button type="submit" class="btn btn-link p-0 text-danger text-decoration-none border-0 bg-transparent btn-touch" aria-label="削除">
                                        <i class="bi bi-trash-fill" aria-hidden="true"></i>
                                    </button>
                                </form>
                                {{end}}
                            </div>
                        </td>
                    </tr>
                    {{else}}
                    <tr>
                        <td colspan="7" class="text-center py-5">
                            <i class="bi bi-inbox display-4 text-muted" aria-hidden="true"></i>
                            <p class="mt-2 mb-1 text-muted fw-bold">課題がありません</p>
                            <a href="/assignments/new" class="btn btn-sm btn-primary mt-1">
                                <i class="bi bi-plus-lg me-1" aria-hidden="true"></i>課題を登録する
                            </a>
                        </td>
                    </tr>
                    {{end}}
                </tbody>
            </table>
        </div>
    </div>
    {{if gt .totalPages 1}}
    <div class="card-footer bg-white border-top-0 py-2">
        <nav aria-label="ページナビゲーション">
            <ul class="pagination pagination-sm justify-content-center mb-0">
                <li class="page-item {{if not .hasPrev}}disabled{{end}}">
                    <a class="page-link border-0 text-secondary" href="/assignments?page={{.prevPage}}&filter={{.filter}}&q={{.query}}&priority={{.priority}}" aria-label="前のページ">
                        <i class="bi bi-chevron-left" aria-hidden="true"></i>
                    </a>
                </li>
                <li class="page-item disabled">
                    <span class="page-link border-0 text-dark fw-bold" aria-current="page">{{.currentPage}} / {{.totalPages}}</span>
                </li>
                <li class="page-item {{if not .hasNext}}disabled{{end}}">
                    <a class="page-link border-0 text-secondary" href="/assignments?page={{.nextPage}}&filter={{.filter}}&q={{.query}}&priority={{.priority}}" aria-label="次のページ">
                        <i class="bi bi-chevron-right" aria-hidden="true"></i>
                    </a>
                </li>
            </ul>
        </nav>
    </div>
    {{end}}
</div>

<script>
    var _countdownInterval = null;

    function updateCountdowns() {
        var now = new Date();
        var hasUnder24h = false;

        document.querySelectorAll('.assignment-row').forEach(function(row) {
            if (row.getAttribute('data-completed') === 'true') return;
            var dueTs = row.getAttribute('data-due-ts');
            if (!dueTs) return;
            var due = new Date(parseInt(dueTs) * 1000);
            if (isNaN(due.getTime())) return;

            var diff = due - now;
            var countdownEl = row.querySelector('.countdown');

            row.classList.remove('anxiety-danger', 'anxiety-warning', 'bg-danger-subtle');
            if (countdownEl) countdownEl.className = 'countdown small fw-bold font-monospace';

            if (diff < 0) {
                if (countdownEl) {
                    countdownEl.textContent = '期限切れ';
                    countdownEl.classList.add('text-danger');
                }
                row.classList.add('bg-danger-subtle');
                return;
            }

            var days    = Math.floor(diff / 86400000);
            var hours   = Math.floor((diff % 86400000) / 3600000);
            var minutes = Math.floor((diff % 3600000) / 60000);
            var seconds = Math.floor((diff % 60000) / 1000);
            var remainingHours = days * 24 + hours;

            var text = (days > 0 ? days + '日 ' : '') +
                String(hours).padStart(2, '0') + ':' +
                String(minutes).padStart(2, '0') + ':' +
                String(seconds).padStart(2, '0');

            if (countdownEl) countdownEl.textContent = text;

            if (remainingHours < 24) {
                hasUnder24h = true;
                row.classList.add('anxiety-danger');
                if (countdownEl) {
                    countdownEl.classList.add('text-danger', 'countdown-urgent');
                    countdownEl.innerHTML = '<i class="bi bi-exclamation-triangle-fill me-1" aria-hidden="true"></i>' + text;
                }
            } else if (days < 7) {
                row.classList.add('anxiety-warning');
                if (countdownEl) {
                    countdownEl.classList.add('text-dark');
                    countdownEl.innerHTML = '<i class="bi bi-exclamation-triangle-fill text-warning me-1" aria-hidden="true"></i>' + text;
                }
            } else {
                if (countdownEl) countdownEl.classList.add('text-secondary');
            }
        });

        scheduleNextUpdate(hasUnder24h);
    }

    function scheduleNextUpdate(hasUnder24h) {
        if (_countdownInterval !== null) return;
        var interval = hasUnder24h ? 1000 : 60000;
        _countdownInterval = setTimeout(function() {
            _countdownInterval = null;
            updateCountdowns();
        }, interval);
    }

    function toggleCountdown() {
        var cols = document.querySelectorAll('.countdown-col');
        var btn  = document.getElementById('toggleCountdownBtn');
        var btnText = document.getElementById('countdownBtnText');
        var isHidden = cols[0] && cols[0].style.display === 'none';

        cols.forEach(function(col) { col.style.display = isHidden ? '' : 'none'; });

        var nowHidden = !isHidden;
        btnText.textContent = nowHidden ? 'カウントダウンを表示' : 'カウントダウンを非表示';
        btn.setAttribute('aria-pressed', nowHidden ? 'true' : 'false');
        localStorage.setItem('countdownHidden', nowHidden);
    }

    updateCountdowns();

    if (localStorage.getItem('countdownHidden') === 'true') {
        document.querySelectorAll('.countdown-col').forEach(function(col) { col.style.display = 'none'; });
        var btn = document.getElementById('toggleCountdownBtn');
        var btnText = document.getElementById('countdownBtnText');
        if (btnText) btnText.textContent = 'カウントダウンを表示';
        if (btn) btn.setAttribute('aria-pressed', 'true');
    }

    document.addEventListener('DOMContentLoaded', function() {
        var recurringModal = document.getElementById('recurringModal');
        if (recurringModal) {
            recurringModal.addEventListener('show.bs.modal', function(event) {
                var button = event.relatedTarget;
                var id         = button.getAttribute('data-recurring-id');
                var title      = button.getAttribute('data-recurring-title');
                var type       = button.getAttribute('data-recurring-type');
                var isActive   = button.getAttribute('data-recurring-active') === 'true';

                document.getElementById('recurringModalTitle').textContent = title;
                document.getElementById('recurringStopForm').action = '/recurring/' + id + '/stop';
                document.getElementById('recurringEditBtn').href = '/recurring/' + id + '/edit';

                var typeLabels = { daily: '毎日', weekly: '毎週', monthly: '毎月', unknown: '(不明)' };
                document.getElementById('recurringTypeLabel').textContent = typeLabels[type] || type || '不明';

                var statusEl = document.getElementById('recurringStatus');
                if (isActive) {
                    statusEl.innerHTML = '<span class="badge bg-success">有効</span>';
                    document.getElementById('recurringStopBtn').style.display = 'inline-block';
                } else {
                    statusEl.innerHTML = '<span class="badge bg-secondary">停止中</span>';
                    document.getElementById('recurringStopBtn').style.display = 'none';
                }
            });
        }
    });
</script>

<div class="modal fade" id="recurringModal" tabindex="-1" aria-labelledby="recurringModalHeading" aria-modal="true" role="dialog">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="recurringModalHeading"><i class="bi bi-repeat me-2" aria-hidden="true"></i>繰り返し課題</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="閉じる"></button>
            </div>
            <div class="modal-body">
                <h6 id="recurringModalTitle" class="mb-3 fw-bold"></h6>
                <table class="table table-sm table-borderless">
                    <tbody>
                        <tr>
                            <th class="text-muted" style="width: 100px;" scope="row">繰り返し</th>
                            <td id="recurringTypeLabel">読み込み中...</td>
                        </tr>
                        <tr>
                            <th class="text-muted" scope="row">状態</th>
                            <td id="recurringStatus">読み込み中...</td>
                        </tr>
                    </tbody>
                </table>
                <div class="alert alert-info small mb-0" role="note">
                    <i class="bi bi-info-circle me-1" aria-hidden="true"></i>
                    繰り返しを停止すると、今後新しい課題は自動作成されなくなります。既存の課題はそのまま残ります。
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">閉じる</button>
                <a id="recurringEditBtn" href="#" class="btn btn-primary">
                    <i class="bi bi-pencil me-1" aria-hidden="true"></i>編集
                </a>
                <form id="recurringStopForm" method="POST" class="d-inline" data-confirm="繰り返しを停止しますか？">
                    <input type="hidden" name="_csrf" value="{{.csrfToken}}">
                    <button type="submit" id="recurringStopBtn" class="btn btn-danger">
                        <i class="bi bi-stop-fill me-1" aria-hidden="true"></i>停止
                    </button>
                </form>
            </div>
        </div>
    </div>
</div>

<div class="modal fade" id="deleteRecurringModal" tabindex="-1" aria-labelledby="deleteRecurringModalHeading" aria-modal="true" role="dialog">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="deleteRecurringModalHeading"><i class="bi bi-trash me-2" aria-hidden="true"></i>繰り返し課題の削除</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="閉じる"></button>
            </div>
            <div class="modal-body">
                <p>この課題は繰り返し設定に関連付けられています。</p>
                <p>繰り返し設定も停止しますか？</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">キャンセル</button>
                <form id="deleteOnlyForm" method="POST" class="d-inline">
                    <input type="hidden" name="_csrf" value="{{.csrfToken}}">
                    <button type="submit" class="btn btn-outline-danger">課題のみ削除</button>
                </form>
                <form id="deleteAndStopForm" method="POST" class="d-inline">
                    <input type="hidden" name="_csrf" value="{{.csrfToken}}">
                    <button type="submit" class="btn btn-danger">削除して繰り返しも削除</button>
                </form>
            </div>
        </div>
    </div>
</div>

<script>
    function showDeleteRecurringModal(assignmentId, recurringId) {
        var modal = new bootstrap.Modal(document.getElementById('deleteRecurringModal'));
        document.getElementById('deleteOnlyForm').action = '/assignments/' + assignmentId + '/delete';
        document.getElementById('deleteAndStopForm').action = '/assignments/' + assignmentId + '/delete?stop_recurring=' + recurringId;
        modal.show();
    }
</script>
{{end}}