import { IMAGE_LOCATIONS } from '../components/Modal/SharedData';
import { createIcons, X, Save, Trash2, ChevronLeft, ChevronRight } from 'lucide';

export class MapEditor {
  private container: HTMLElement;
  private wrapper: HTMLElement;
  private img: HTMLImageElement;
  private boxListEl: HTMLElement;
  private pathLabel: HTMLElement;
  private statusEl: HTMLElement;
  private saveBtn: HTMLButtonElement;
  private fileSidebar: HTMLElement;

  private allMapConfig: Record<string, any[]> = {};
  private boxes: any[] = [];
  private isDrawing: boolean = false;
  private startX: number = 0;
  private startY: number = 0;
  private currentBox: HTMLElement | null = null;
  private currentPath: string = '';

  constructor() {
    this.container = document.getElementById('container')!;
    this.wrapper = document.getElementById('wrapper')!;
    this.img = document.getElementById('target-img') as HTMLImageElement;
    this.boxListEl = document.getElementById('box-list')!;
    this.pathLabel = document.getElementById('current-path')!;
    this.statusEl = document.getElementById('save-status')!;
    this.saveBtn = document.getElementById('btn-save-server') as HTMLButtonElement;
    this.fileSidebar = document.getElementById('file-sidebar')!;
  }

  public async init() {
    this.renderFileSidebar();
    await this.loadConfig();
    this.bindEvents();
    this.selectFirstFile();
    createIcons({ icons: { X, Save, Trash2, ChevronLeft, ChevronRight } });
  }

  private renderFileSidebar() {
    let html = '';
    Object.entries(IMAGE_LOCATIONS).forEach(([bldg, details]) => {
      html += `<div class="folder-item">${bldg}</div>`;
      Object.entries(details).forEach(([detail, paths]) => {
        paths.forEach(path => {
          const fileName = path.split('/').pop() || path;
          html += `<div class="file-item" data-path="${path}">${fileName}</div>`;
        });
      });
    });
    this.fileSidebar.innerHTML = html;

    this.fileSidebar.querySelectorAll('.file-item').forEach(item => {
      item.addEventListener('click', () => {
        this.fileSidebar.querySelectorAll('.file-item').forEach(i => i.classList.remove('active'));
        item.classList.add('active');
        this.renderCurrentFile();
      });
    });
  }

  private selectFirstFile() {
    const firstItem = this.fileSidebar.querySelector('.file-item') as HTMLElement;
    if (firstItem) {
      firstItem.classList.add('active');
      this.renderCurrentFile();
    }
  }

  private async loadConfig() {
    try {
      const res = await fetch(`http://${location.hostname}:3000/api/maps`);
      this.allMapConfig = await res.json();
    } catch (err) {
      console.error('Failed to load config:', err);
    }
  }

  private renderCurrentFile() {
    const activeItem = this.fileSidebar.querySelector('.file-item.active') as HTMLElement;
    if (!activeItem) return;

    this.currentPath = activeItem.dataset.path || '';
    this.boxes = this.allMapConfig[this.currentPath] || [];
    this.pathLabel.textContent = this.currentPath;
    this.img.src = this.currentPath;
    this.render();
  }

  private bindEvents() {
    this.wrapper.addEventListener('mousedown', (e) => {
      if (e.button !== 0) return;
      this.isDrawing = true;
      const rect = this.wrapper.getBoundingClientRect();
      this.startX = e.clientX - rect.left;
      this.startY = e.clientY - rect.top;

      this.currentBox = document.createElement('div');
      this.currentBox.className = 'draw-box';
      this.currentBox.style.left = this.startX + 'px';
      this.currentBox.style.top = this.startY + 'px';
      
      const label = document.createElement('div');
      label.className = 'box-label';
      label.textContent = '#' + (this.boxes.length + 1);
      this.currentBox.appendChild(label);
      
      this.wrapper.appendChild(this.currentBox);
    });

    window.addEventListener('mousemove', (e) => {
      if (!this.isDrawing || !this.currentBox) return;
      const rect = this.wrapper.getBoundingClientRect();
      const currentX = Math.max(0, Math.min(e.clientX - rect.left, rect.width));
      const currentY = Math.max(0, Math.min(e.clientY - rect.top, rect.height));

      const width = currentX - this.startX;
      const height = currentY - this.startY;

      this.currentBox.style.width = Math.abs(width) + 'px';
      this.currentBox.style.height = Math.abs(height) + 'px';
      this.currentBox.style.left = (width > 0 ? this.startX : currentX) + 'px';
      this.currentBox.style.top = (height > 0 ? this.startY : currentY) + 'px';
    });

    window.addEventListener('mouseup', () => {
      if (!this.isDrawing || !this.currentBox) return;
      this.isDrawing = false;
      
      const width = parseFloat(this.currentBox.style.width);
      const height = parseFloat(this.currentBox.style.height);

      if (width > 3 && height > 3) {
        const rect = this.wrapper.getBoundingClientRect();
        const boxData = {
          x: (parseFloat(this.currentBox.style.left) / rect.width * 100).toFixed(2),
          y: (parseFloat(this.currentBox.style.top) / rect.height * 100).toFixed(2),
          w: (width / rect.width * 100).toFixed(2),
          h: (height / rect.height * 100).toFixed(2)
        };
        this.boxes.push(boxData);
        this.render();
      }
      
      this.currentBox.remove();
      this.currentBox = null;
    });

    (window as any).removeBox = (index: number) => {
      this.boxes.splice(index, 1);
      this.render();
    };

    document.getElementById('btn-clear-all')?.addEventListener('click', () => {
      if(confirm('모든 박스를 삭제할까요?')) {
        this.boxes = [];
        this.render();
      }
    });

    document.getElementById('btn-save-server')?.addEventListener('click', () => this.saveToServer());
  }

  private async saveToServer() {
    if (!this.currentPath) return;
    
    try {
      this.saveBtn.disabled = true;
      this.saveBtn.textContent = '저장 중...';
      
      const res = await fetch(`http://${location.hostname}:3000/api/maps/save`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ path: this.currentPath, boxes: this.boxes })
      });

      if (res.ok) {
        this.allMapConfig[this.currentPath] = [...this.boxes];
        this.statusEl.textContent = '✅ 서버 저장 완료 (' + new Date().toLocaleTimeString() + ')';
        setTimeout(() => this.statusEl.textContent = '', 3000);
      } else {
        alert('저장 실패!');
      }
    } catch (err) {
      alert('서버 연결 오류!');
    } finally {
      this.saveBtn.disabled = false;
      this.saveBtn.textContent = '서버에 즉시 저장';
    }
  }

  private render() {
    this.boxListEl.innerHTML = '';
    const oldBoxes = this.wrapper.querySelectorAll('.placed-box');
    oldBoxes.forEach(b => b.remove());

    this.boxes.forEach((box, i) => {
      const div = document.createElement('div');
      div.className = 'placed-box';
      div.style.left = box.x + '%';
      div.style.top = box.y + '%';
      div.style.width = box.w + '%';
      div.style.height = box.h + '%';
      
      const label = document.createElement('div');
      label.className = 'box-label';
      label.textContent = '#' + (i + 1);
      div.appendChild(label);
      
      this.wrapper.appendChild(div);

      const item = document.createElement('div');
      item.className = 'box-item';
      item.innerHTML = `
        <span>#${i+1}: [${box.x}, ${box.y}]</span>
        <button class="btn-del" onclick="removeBox(${i})">×</button>
      `;
      this.boxListEl.appendChild(item);
    });
  }
}