'use client';

import React, { useState } from 'react';
import styled from 'styled-components';
import Link from 'next/link';
import StatusBadge from '../common/StatusBadge';
import { theme } from '@/styles/theme';

type Status = 'online' | 'offline' | 'working' | 'unknown';

interface OrgNodeData {
  id?: number;
  name: string;
  role: string;
  description?: string;
  status?: Status;
  lastSeen?: string | null;
  lxcId?: number;
  isOwner?: boolean;
}

interface PopupState {
  node: OrgNodeData;
  x: number;
  y: number;
}

const sisterEmojis: Record<string, string> = {
  harang: '🦊', narang: '🦊', darang: '🐱', erang: '🐺', 자기야: '👤',
};

const sisterDisplayNames: Record<string, string> = {
  harang: '하랑이', narang: '나랑이', darang: '다랑이', erang: '이랑이',
};

const statusColors: Record<Status, string> = {
  online: '#00FF00',
  offline: '#FF1744',
  working: '#2979FF',
  unknown: 'var(--text-secondary)',
};

// ─── 조직도 레이아웃 ───
const Tree = styled.div`
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 20px 0;
  position: relative;
  overflow-x: auto;
`;

const Level = styled.div`
  display: flex;
  justify-content: center;
  gap: 24px;
  position: relative;
`;

const ConnectorV = styled.div`
  width: 2px;
  height: 32px;
  background: linear-gradient(to bottom, var(--border-color), rgba(88,166,255,0.4));
  margin: 0 auto;
`;

const ConnectorH = styled.div`
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 2px;
  background: rgba(88,166,255,0.3);
  width: calc(100% - 100px);
`;

const BranchWrap = styled.div`
  position: relative;
  display: flex;
  gap: 24px;
  align-items: flex-start;
`;

const NodeCard = styled.div<{ $status?: Status; $isOwner?: boolean }>`
  background: var(--bg-surface);
  backdrop-filter: blur(12px);
  border: 1px solid ${({ $status }) =>
    $status ? `${statusColors[$status]}66` : 'var(--border-color)'};
  border-radius: 12px;
  padding: ${({ $isOwner }) => $isOwner ? '14px 24px' : '12px 18px'};
  min-width: ${({ $isOwner }) => $isOwner ? '140px' : '130px'};
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  position: relative;

  &:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    border-color: ${({ $status }) => $status ? statusColors[$status] : '#58A6FF'};
  }
`;

const NodeEmoji = styled.div`
  font-size: 22px;
  margin-bottom: 4px;
`;

const NodeName = styled.div`
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
`;

const NodeRole = styled.div`
  font-size: 11px;
  color: var(--text-secondary);
`;

const StatusDot = styled.div<{ $status: Status }>`
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: ${({ $status }) => statusColors[$status]};
  position: absolute;
  top: 8px;
  right: 8px;
  ${({ $status }) => $status === 'online' && `
    box-shadow: 0 0 6px #00FF00;
  `}
`;

const PipelineLabel = styled.div`
  font-size: 10px;
  color: rgba(88,166,255,0.6);
  text-align: center;
  margin-top: 2px;
`;

// Popup
const Popup = styled.div<{ $x: number; $y: number }>`
  position: fixed;
  left: ${({ $x }) => $x}px;
  top: ${({ $y }) => $y}px;
  z-index: 200;
  background: rgba(22,27,34,0.97);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px 16px;
  min-width: 200px;
  max-width: 260px;
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
`;

const PopupName = styled.div`
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
`;

const PopupRole = styled.div`
  font-size: 12px;
  color: #58A6FF;
  margin-bottom: 8px;
`;

const PopupDesc = styled.div`
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
`;

function formatLastSeen(lastSeen: string | null | undefined): string {
  if (!lastSeen) return '기록 없음';
  const diff = Date.now() - new Date(lastSeen).getTime();
  const min = Math.floor(diff / 60000);
  if (min < 1) return '방금 전';
  if (min < 60) return `${min}분 전`;
  return `${Math.floor(min / 60)}시간 전`;
}

interface OrgTreeProps {
  sisters: OrgNodeData[];
}

export default function OrgTree({ sisters }: OrgTreeProps) {
  const [popup, setPopup] = useState<PopupState | null>(null);

  const harang = sisters.find((s) => s.name === 'harang');
  const narang = sisters.find((s) => s.name === 'narang');
  const darang = sisters.find((s) => s.name === 'darang');
  const erang = sisters.find((s) => s.name === 'erang');

  const handleHover = (node: OrgNodeData, e: React.MouseEvent) => {
    const rect = (e.target as HTMLElement).getBoundingClientRect();
    setPopup({ node, x: rect.right + 10, y: rect.top });
  };

  const renderNode = (node: OrgNodeData | undefined, isOwner = false) => {
    if (!node) return null;
    const displayName = sisterDisplayNames[node.name] ?? node.name;
    const status = node.status ?? 'unknown';
    const isClickable = !isOwner;

    return (
      <NodeCard
        as={isClickable ? Link : 'div'}
        {...(isClickable ? { href: `/sisters/${node.name}` } : {})}
        $status={isOwner ? undefined : status as Status}
        $isOwner={isOwner}
        onMouseEnter={(e: React.MouseEvent) => handleHover(node, e)}
        onMouseLeave={() => setPopup(null)}
      >
        {!isOwner && <StatusDot $status={status as Status} />}
        <NodeEmoji>{sisterEmojis[node.name] ?? '🤖'}</NodeEmoji>
        <NodeName>{displayName}</NodeName>
        <NodeRole>{node.role}</NodeRole>
      </NodeCard>
    );
  };

  return (
    <>
      <Tree>
        {/* 자기야 */}
        <Level>
          {renderNode({ name: '자기야', role: 'Owner', isOwner: true }, true)}
        </Level>
        <ConnectorV />

        {/* 하랑이 */}
        <Level>
          {renderNode(harang)}
        </Level>

        {/* 파이프라인 라벨 */}
        <div style={{ display: 'flex', gap: '80px', marginTop: '4px' }}>
          <PipelineLabel>핸드오프 ↓</PipelineLabel>
          <PipelineLabel>↓ 배포 요청</PipelineLabel>
        </div>

        <ConnectorV />

        {/* 나랑이 / 다랑이 / 이랑이 */}
        <div style={{ position: 'relative' }}>
          <Level>
            {renderNode(narang)}
            {renderNode(darang)}
            {renderNode(erang)}
          </Level>
          <ConnectorH />
        </div>

        {/* 파이프라인 설명 */}
        <div style={{ display: 'flex', gap: '16px', marginTop: '12px', justifyContent: 'center' }}>
          <PipelineLabel>Generator</PipelineLabel>
          <PipelineLabel>↔ 리뷰/수정 ↔</PipelineLabel>
          <PipelineLabel>Evaluator</PipelineLabel>
          <PipelineLabel style={{ marginLeft: '8px' }}>Infra</PipelineLabel>
        </div>
      </Tree>

      {popup && (
        <Popup $x={popup.x} $y={popup.y}>
          <PopupName>
            {sisterEmojis[popup.node.name] ?? '🤖'}{' '}
            {sisterDisplayNames[popup.node.name] ?? popup.node.name}
          </PopupName>
          <PopupRole>{popup.node.role}</PopupRole>
          {popup.node.description && (
            <PopupDesc>{popup.node.description}</PopupDesc>
          )}
          {!popup.node.isOwner && (
            <PopupDesc style={{ marginTop: '8px' }}>
              상태: {popup.node.status ?? 'unknown'}<br />
              마지막 활동: {formatLastSeen(popup.node.lastSeen)}
            </PopupDesc>
          )}
        </Popup>
      )}
    </>
  );
}