@extends('layouts.app')

@section('title', '기안 수정')

@section('content')
    <div class="flex flex-col sm:flex-row sm:justify-between sm:items-center gap-4 mb-6">
        <div>
            <h1 class="text-2xl font-bold text-gray-800">기안 수정</h1>
            <p class="text-sm text-gray-500 mt-1">{{ $approval->document_number }}</p>
        </div>
        <div class="flex gap-2">
            <a href="{{ route('approvals.show', $approval->id) }}" class="text-gray-600 hover:text-gray-800 text-sm px-3 py-2 border rounded-lg">
                상세보기
            </a>
            <a href="{{ route('approvals.drafts') }}" class="text-gray-600 hover:text-gray-800 text-sm px-3 py-2 border rounded-lg">
                기안함
            </a>
        </div>
    </div>

    @if($approval->status === 'rejected')
        <div class="bg-red-50 border-l-4 border-red-400 p-4 mb-6 rounded" style="max-width: 960px; margin-left: auto; margin-right: auto;">
            <div class="flex items-center">
                <span class="text-red-700 font-medium">반려됨</span>
            </div>
            @php
                $rejectedStep = $approval->steps->firstWhere('status', 'rejected');
            @endphp
            @if($rejectedStep)
                <p class="text-sm text-red-600 mt-1">
                    {{ $rejectedStep->approver_name ?? '' }} ({{ $rejectedStep->acted_at?->format('Y-m-d H:i') }}):
                    {{ $rejectedStep->comment }}
                </p>
            @endif
        </div>
    @endif

    <div class="mx-auto" style="max-width: 960px;">
        <div class="bg-white rounded-lg shadow-sm p-6">
            <h2 class="text-lg font-semibold text-gray-800 mb-4">문서 내용</h2>

            <div class="mb-4">
                <label class="block text-sm font-medium text-gray-700 mb-1">양식 <span class="text-red-500">*</span></label>
                <select id="form_id" class="w-full px-3 py-2 border border-gray-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
                    @foreach($forms as $form)
                        <option value="{{ $form->id }}" {{ $approval->form_id == $form->id ? 'selected' : '' }}>{{ $form->name }}</option>
                    @endforeach
                </select>
            </div>

            <div class="mb-4">
                <label class="block text-sm font-medium text-gray-700 mb-1">제목 <span class="text-red-500">*</span></label>
                <input type="text" id="title" maxlength="200" value="{{ $approval->title }}"
                       class="w-full px-3 py-2 border border-gray-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
            </div>

            {{-- 결재선 --}}
            <div class="mb-4">
                <div class="flex items-center justify-between mb-1">
                    <label class="block text-sm font-medium text-gray-700">결재선</label>
                    <div class="flex items-center gap-2">
                        <select id="quick-line-select" onchange="applyQuickLine(this.value)"
                                class="px-2 py-1.5 border border-gray-300 rounded-lg text-xs focus:outline-none focus:ring-2 focus:ring-blue-500"
                                style="min-width: 160px;">
                            <option value="">결재선 선택</option>
                            @foreach($lines as $line)
                                <option value="{{ $line->id }}" {{ ($approval->line_id ?? '') == $line->id ? 'selected' : '' }}>
                                    {{ $line->name }} ({{ count($line->steps ?? []) }}단계)
                                </option>
                            @endforeach
                        </select>
                        <button type="button" onclick="openApprovalLineModal()"
                                class="px-3 py-1.5 bg-blue-50 text-blue-600 hover:bg-blue-100 rounded-lg text-xs font-medium transition whitespace-nowrap">
                            세부 설정
                        </button>
                    </div>
                </div>
                <div id="approval-line-summary" class="p-3 bg-gray-50 rounded-lg border border-gray-200 flex items-center">
                    <span class="text-sm text-gray-400">결재선이 설정되지 않았습니다.</span>
                </div>
            </div>

            <div class="mb-4">
                <label class="inline-flex items-center gap-2 cursor-pointer">
                    <input type="checkbox" id="is_urgent" {{ $approval->is_urgent ? 'checked' : '' }}
                           class="rounded border-gray-300 text-red-600 focus:ring-red-500">
                    <span class="text-sm text-gray-700">긴급</span>
                </label>
            </div>

            {{-- 본문 (일반 양식) --}}
            <div id="body-area" class="mb-4">
                <label class="block text-sm font-medium text-gray-700 mb-1">
                    본문
                    <label class="inline-flex items-center gap-1 ml-3 cursor-pointer">
                        <input type="checkbox" id="useEditor" onchange="toggleEditor()"
                               class="rounded border-gray-300 text-blue-600 focus:ring-blue-500">
                        <span class="text-xs text-gray-500 font-normal">편집기</span>
                    </label>
                </label>
                <textarea id="body" rows="12"
                          class="w-full px-3 py-2 border border-gray-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
                          style="min-height: 300px;">{{ $approval->body }}</textarea>
                <div id="quill-container" style="display: none; min-height: 300px;"></div>
            </div>

            {{-- 지출결의서 전용 폼 --}}
            @php
                $existingFiles = [];
                if (!empty($approval->attachments)) {
                    $fileIds = collect($approval->attachments)->pluck('id')->filter();
                    if ($fileIds->isNotEmpty()) {
                        $existingFiles = \App\Models\Boards\File::whereIn('id', $fileIds)
                            ->get()
                            ->map(fn($f) => [
                                'id' => $f->id,
                                'name' => $f->original_name,
                                'size' => $f->file_size,
                                'mime_type' => $f->mime_type,
                            ])->toArray();
                    }
                }
            @endphp
            @include('approvals.partials._expense-form', [
                'initialData' => $approval->content ?? [],
                'initialFiles' => $existingFiles,
                'cards' => $cards ?? collect(),
                'accounts' => $accounts ?? collect(),
            ])

            {{-- 액션 버튼 --}}
            <div class="border-t pt-4 mt-4 flex gap-2 justify-end">
                <button onclick="updateApproval('save')"
                        class="bg-gray-600 hover:bg-gray-700 text-white px-6 py-2 rounded-lg transition text-sm font-medium">
                    저장
                </button>
                <button onclick="updateApproval('submit')"
                        class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded-lg transition text-sm font-medium">
                    {{ $approval->status === 'rejected' ? '재상신' : '상신' }}
                </button>
                @if($approval->isDeletable())
                    <button onclick="deleteApproval()"
                            class="bg-red-100 hover:bg-red-200 text-red-700 px-6 py-2 rounded-lg transition text-sm font-medium">
                        삭제
                    </button>
                @endif
            </div>
        </div>
    </div>

    {{-- 결재선 모달 --}}
    <div id="approval-line-modal" style="display: none;" class="fixed inset-0 z-50">
        <div class="absolute inset-0 bg-black/50" onclick="closeApprovalLineModal()"></div>
        <div class="relative flex items-center justify-center min-h-full p-4">
            <div class="bg-white rounded-xl shadow-2xl w-full overflow-hidden relative" style="max-width: 720px;">
                <button type="button" onclick="closeApprovalLineModal()"
                        class="absolute top-3 right-3 z-10 p-1 text-gray-400 hover:text-gray-600 transition bg-white rounded-full shadow-sm">
                    <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
                    </svg>
                </button>
                <div class="overflow-y-auto" style="max-height: 70vh;">
                    @php
                        $initialSteps = $approval->steps->map(fn($s) => [
                            'user_id' => $s->approver_id,
                            'user_name' => $s->approver_name ?? ($s->approver?->name ?? ''),
                            'department' => $s->approver_department ?? '',
                            'position' => $s->approver_position ?? '',
                            'step_type' => $s->step_type,
                        ])->toArray();
                    @endphp
                    @include('approvals.partials._approval-line-editor', [
                        'lines' => $lines,
                        'initialSteps' => $initialSteps,
                        'selectedLineId' => $approval->line_id ?? '',
                    ])
                </div>
                <div class="px-5 py-3 border-t border-gray-200 flex justify-end">
                    <button type="button" onclick="closeApprovalLineModal()"
                            class="px-6 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg text-sm font-medium transition">
                        확인
                    </button>
                </div>
            </div>
        </div>
    </div>
@endsection

@push('styles')
<link href="https://cdn.jsdelivr.net/npm/quill@2.0.3/dist/quill.snow.css" rel="stylesheet">
<style>
    #quill-container .ql-editor { min-height: 260px; font-size: 0.875rem; }
    #quill-container .ql-toolbar { border-radius: 0.5rem 0.5rem 0 0; border-color: #d1d5db; }
    #quill-container .ql-container { border-radius: 0 0 0.5rem 0.5rem; border-color: #d1d5db; }
    #summary-sortable .step-card {
        cursor: grab;
        position: relative;
        margin-right: 24px;
        user-select: none;
        transition: transform 0.15s ease, box-shadow 0.15s ease;
    }
    #summary-sortable .step-card:last-child { margin-right: 0; }
    #summary-sortable .step-card:not(:last-child)::after {
        content: '→';
        position: absolute;
        right: -18px;
        top: 50%;
        transform: translateY(-50%);
        color: #d1d5db;
        font-size: 14px;
        pointer-events: none;
    }
    #summary-sortable .step-card:hover {
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        transform: translateY(-1px);
    }
    #summary-sortable .step-card:active { cursor: grabbing; }
    #summary-sortable .step-card.sortable-ghost { opacity: 0.3; }
    #summary-sortable .step-card.sortable-chosen {
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        transform: translateY(-2px);
    }
</style>
@endpush

@push('scripts')
<script src="https://cdn.jsdelivr.net/npm/quill@2.0.3/dist/quill.js"></script>
<script>
let quillInstance = null;
var summarySortableInstance = null;
const formBodyTemplates = @json($forms->pluck('body_template', 'id'));
const formCodes = @json($forms->pluck('code', 'id'));
const linesData = @json($lines);
let isExpenseForm = false;

function escapeHtml(str) {
    if (!str) return '';
    const div = document.createElement('div');
    div.appendChild(document.createTextNode(str));
    return div.innerHTML;
}

function toggleEditor() {
    const useEditor = document.getElementById('useEditor').checked;
    const textarea = document.getElementById('body');
    const container = document.getElementById('quill-container');

    if (useEditor) {
        container.style.display = '';
        textarea.style.display = 'none';
        if (!quillInstance) {
            quillInstance = new Quill('#quill-container', {
                theme: 'snow',
                modules: {
                    toolbar: [
                        [{ 'header': [1, 2, 3, false] }],
                        ['bold', 'italic', 'underline', 'strike'],
                        [{ 'color': [] }, { 'background': [] }],
                        [{ 'list': 'ordered' }, { 'list': 'bullet' }],
                        [{ 'align': [] }],
                        ['blockquote', 'code-block'],
                        ['link'],
                        ['clean'],
                    ],
                },
                placeholder: '기안 내용을 입력하세요...',
            });
        }
        const text = textarea.value.trim();
        if (text) {
            if (/<[a-z][\s\S]*>/i.test(text)) {
                quillInstance.root.innerHTML = text;
            } else {
                quillInstance.setText(text);
            }
        }
    } else {
        container.style.display = 'none';
        textarea.style.display = '';
        if (quillInstance) {
            const html = quillInstance.root.innerHTML;
            textarea.value = (html === '<p><br></p>') ? '' : html;
        }
    }
}

function getBodyContent() {
    const useEditor = document.getElementById('useEditor')?.checked;
    if (useEditor && quillInstance) {
        const html = quillInstance.root.innerHTML;
        return (html === '<p><br></p>') ? '' : html;
    }
    return document.getElementById('body').value;
}

function openApprovalLineModal() {
    document.getElementById('approval-line-modal').style.display = '';
    document.body.style.overflow = 'hidden';
}

function closeApprovalLineModal() {
    document.getElementById('approval-line-modal').style.display = 'none';
    document.body.style.overflow = '';
    updateApprovalLineSummary();

    // 모달 내부 결재선 선택과 외부 드롭다운 동기화
    const editorEl = document.getElementById('approval-line-editor');
    if (editorEl && editorEl._x_dataStack) {
        document.getElementById('quick-line-select').value = editorEl._x_dataStack[0].selectedLineId || '';
    }
}

function updateApprovalLineSummary() {
    const editorEl = document.getElementById('approval-line-editor');
    if (!editorEl || !editorEl._x_dataStack) return;

    const steps = editorEl._x_dataStack[0].steps;
    const summaryEl = document.getElementById('approval-line-summary');

    if (summarySortableInstance) { summarySortableInstance.destroy(); summarySortableInstance = null; }

    if (!steps || steps.length === 0) {
        summaryEl.className = 'p-3 bg-gray-50 rounded-lg border border-gray-200 flex items-center';
        summaryEl.innerHTML = '<span class="text-sm text-gray-400">결재선이 설정되지 않았습니다.</span>';
        return;
    }

    const typeCounters = { approval: 0, agreement: 0, reference: 0 };
    const typeLabels = { approval: '결재', agreement: '합의', reference: '참조' };
    const typeBg = { approval: 'bg-blue-50 border-blue-100', agreement: 'bg-green-50 border-green-100', reference: 'bg-gray-100 border-gray-200' };
    const typeLabelColor = { approval: 'text-blue-600', agreement: 'text-green-600', reference: 'text-gray-500' };

    const cards = [];
    steps.forEach(function(s, i) {
        typeCounters[s.step_type] = (typeCounters[s.step_type] || 0) + 1;
        var count = typeCounters[s.step_type];
        var label = typeLabels[s.step_type] || s.step_type;
        var bg = typeBg[s.step_type] || typeBg.reference;
        var labelColor = typeLabelColor[s.step_type] || typeLabelColor.reference;
        var stepLabel = s.step_type === 'reference' ? label : count + '차 ' + label;
        var position = s.position || '';

        cards.push(
            '<div class="step-card text-center px-3 py-2 rounded-lg border ' + bg + '" data-index="' + i + '" style="min-width: 72px;">' +
            '<div class="text-xs font-medium ' + labelColor + '">' + escapeHtml(stepLabel) + '</div>' +
            (position ? '<div class="text-xs text-gray-400 mt-0.5">' + escapeHtml(position) + '</div>' : '') +
            '<div class="text-sm font-semibold text-gray-800 mt-0.5">' + escapeHtml(s.user_name) + '</div>' +
            '</div>'
        );
    });

    summaryEl.className = 'p-3 bg-gray-50 rounded-lg border border-gray-200';
    summaryEl.innerHTML = '<div id="summary-sortable" class="flex flex-wrap items-center">' + cards.join('') + '</div>' +
        (steps.length > 1 ? '<div class="text-xs text-gray-400 mt-2">드래그하여 순서를 변경할 수 있습니다</div>' : '');

    initSummarySortable();
}

function initSummarySortable() {
    if (summarySortableInstance) { summarySortableInstance.destroy(); summarySortableInstance = null; }
    var el = document.getElementById('summary-sortable');
    if (!el || typeof Sortable === 'undefined') return;

    summarySortableInstance = Sortable.create(el, {
        animation: 150,
        ghostClass: 'sortable-ghost',
        chosenClass: 'sortable-chosen',
        onEnd: function(evt) {
            if (evt.oldIndex === evt.newIndex) return;
            var editorEl = document.getElementById('approval-line-editor');
            if (!editorEl || !editorEl._x_dataStack) return;
            var steps = editorEl._x_dataStack[0].steps;
            var item = steps.splice(evt.oldIndex, 1)[0];
            steps.splice(evt.newIndex, 0, item);
            updateApprovalLineSummary();
        }
    });
}

function applyQuickLine(lineId) {
    const editorEl = document.getElementById('approval-line-editor');
    if (!editorEl || !editorEl._x_dataStack) return;
    const alpineData = editorEl._x_dataStack[0];

    if (!lineId) {
        alpineData.selectedLineId = '';
        alpineData.steps = [];
    } else {
        alpineData.selectedLineId = lineId;
        alpineData.loadLine();
    }

    setTimeout(updateApprovalLineSummary, 100);
}

function switchFormMode(formId) {
    const code = formCodes[formId];
    const expenseContainer = document.getElementById('expense-form-container');
    const bodyArea = document.getElementById('body-area');

    if (code === 'expense') {
        isExpenseForm = true;
        expenseContainer.style.display = '';
        bodyArea.style.display = 'none';
    } else {
        isExpenseForm = false;
        expenseContainer.style.display = 'none';
        bodyArea.style.display = '';
    }
}

function applyBodyTemplate(formId) {
    // 먼저 폼 모드 전환
    switchFormMode(formId);

    // 전용 폼이면 제목만 자동 설정하고 body template 적용 건너뜀
    if (isExpenseForm) {
        const titleEl = document.getElementById('title');
        if (!titleEl.value.trim()) {
            const formSelect = document.getElementById('form_id');
            titleEl.value = formSelect.options[formSelect.selectedIndex].text;
        }
        return;
    }

    const template = formBodyTemplates[formId];
    if (!template) return;

    // edit에서는 항상 confirm (기존 본문이 있을 가능성 높음)
    const bodyContent = getBodyContent();
    if (bodyContent.trim()) {
        if (!confirm('현재 본문 내용을 양식 템플릿으로 교체하시겠습니까?')) return;
    }

    // 제목 자동 설정 (비어있을 때만)
    const titleEl = document.getElementById('title');
    if (!titleEl.value.trim()) {
        const formSelect = document.getElementById('form_id');
        titleEl.value = formSelect.options[formSelect.selectedIndex].text;
    }

    const useEditorEl = document.getElementById('useEditor');
    if (!useEditorEl.checked) {
        useEditorEl.checked = true;
        toggleEditor();
    }

    if (quillInstance) {
        quillInstance.root.innerHTML = template;
    }
    document.getElementById('body').value = template;
}

document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape') {
        const modal = document.getElementById('approval-line-modal');
        if (modal && modal.style.display !== 'none') {
            closeApprovalLineModal();
        }
    }
});

// 기존 HTML body 자동 감지 → 편집기 자동 활성화 + 결재선 요약 초기화
document.addEventListener('DOMContentLoaded', function () {
    // 초기 양식에 대한 폼 모드 전환
    switchFormMode(document.getElementById('form_id').value);

    // 전용 폼이 아닌 경우에만 Quill 편집기 자동 활성화
    if (!isExpenseForm) {
        const existingBody = document.getElementById('body').value;
        if (/<[a-z][\s\S]*>/i.test(existingBody)) {
            document.getElementById('useEditor').checked = true;
            toggleEditor();
        }
    }

    // Alpine 초기화 후 기존 결재선 요약 표시
    setTimeout(updateApprovalLineSummary, 200);

    // 양식 변경 시 본문 템플릿 자동 채움
    document.getElementById('form_id').addEventListener('change', function() {
        applyBodyTemplate(this.value);
    });
});

async function updateApproval(action) {
    const title = document.getElementById('title').value.trim();
    if (!title) {
        showToast('제목을 입력해주세요.', 'warning');
        return;
    }

    const editorEl = document.getElementById('approval-line-editor');
    const steps = editorEl._x_dataStack[0].getStepsData();

    if (action === 'submit' && steps.filter(s => s.step_type !== 'reference').length === 0) {
        showToast('결재자를 1명 이상 추가해주세요.', 'warning');
        return;
    }

    let expenseContent = {};
    let attachmentFileIds = [];
    if (isExpenseForm) {
        const expenseEl = document.getElementById('expense-form-container');
        if (expenseEl && expenseEl._x_dataStack) {
            expenseContent = expenseEl._x_dataStack[0].getFormData();
            attachmentFileIds = expenseEl._x_dataStack[0].getFileIds();
        }
    }

    const payload = {
        form_id: document.getElementById('form_id').value,
        title: title,
        body: isExpenseForm ? null : getBodyContent(),
        content: isExpenseForm ? expenseContent : {},
        attachment_file_ids: attachmentFileIds,
        is_urgent: document.getElementById('is_urgent').checked,
        steps: steps,
    };

    try {
        const response = await fetch('/api/admin/approvals/{{ $approval->id }}', {
            method: 'PUT',
            headers: {
                'Content-Type': 'application/json',
                'X-CSRF-TOKEN': '{{ csrf_token() }}',
                'Accept': 'application/json',
            },
            body: JSON.stringify(payload),
        });

        const data = await response.json();

        if (!data.success) {
            showToast(data.message || '저장에 실패했습니다.', 'error');
            return;
        }

        if (action === 'submit') {
            const submitResponse = await fetch('/api/admin/approvals/{{ $approval->id }}/submit', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-TOKEN': '{{ csrf_token() }}',
                    'Accept': 'application/json',
                },
            });

            const submitData = await submitResponse.json();

            if (submitData.success) {
                showToast('결재가 상신되었습니다.', 'success');
                setTimeout(() => location.href = '/approval-mgmt/drafts', 500);
            } else {
                showToast(submitData.message || '상신에 실패했습니다.', 'error');
            }
        } else {
            showToast('저장되었습니다.', 'success');
        }
    } catch (e) {
        showToast('서버 오류가 발생했습니다.', 'error');
    }
}

async function deleteApproval() {
    if (!confirm('이 문서를 삭제하시겠습니까?')) return;

    try {
        const response = await fetch('/api/admin/approvals/{{ $approval->id }}', {
            method: 'DELETE',
            headers: {
                'X-CSRF-TOKEN': '{{ csrf_token() }}',
                'Accept': 'application/json',
            },
        });

        const data = await response.json();

        if (data.success) {
            showToast('삭제되었습니다.', 'success');
            setTimeout(() => location.href = '/approval-mgmt/drafts', 500);
        } else {
            showToast(data.message || '삭제에 실패했습니다.', 'error');
        }
    } catch (e) {
        showToast('서버 오류가 발생했습니다.', 'error');
    }
}
</script>
@endpush