import { POPUP_STYLES } from './plugins/visual-editor/visual-editor-config.js';

const PLUGIN_APPLY_EDIT_API_URL = '/api/apply-edit';

const ALLOWED_PARENT_ORIGINS = [
	'https://horizons.hostinger.com',
	'https://horizons.hostinger.dev',
	'https://horizons-frontend-local.hostinger.dev',
	'http://localhost:4000',
];

let disabledTooltipElement = null;
let currentDisabledHoverElement = null;

let translations = {
  disabledTooltipText: "This text can be changed only through chat.",
  disabledTooltipTextImage: "This image can only be changed through chat."
};

let areStylesInjected = false;

let globalEventHandlers = null;

let currentEditingInfo = null;

function injectPopupStyles() {
  if (areStylesInjected) return;

  const styleElement = document.createElement('style');
  styleElement.id = 'inline-editor-styles';
  styleElement.textContent = POPUP_STYLES;
  document.head.appendChild(styleElement);
  areStylesInjected = true;
}

function findEditableElementAtPoint(event) {
  let editableElement = event.target.closest('[data-edit-id]');
  
  if (editableElement) {
    return editableElement;
  }
  
  const elementsAtPoint = document.elementsFromPoint(event.clientX, event.clientY);
  
  const found = elementsAtPoint.find(el => el !== event.target && el.hasAttribute('data-edit-id'));
  if (found) return found;
  
  return null;
}

function findDisabledElementAtPoint(event) {
  const direct = event.target.closest('[data-edit-disabled]');
  if (direct) return direct;
  const elementsAtPoint = document.elementsFromPoint(event.clientX, event.clientY);
  const found = elementsAtPoint.find(el => el !== event.target && el.hasAttribute('data-edit-disabled'));
  if (found) return found;
  return null;
}

function showPopup(targetElement, editId, currentContent, isImage = false) {
 currentEditingInfo = { editId, targetElement };

 const parentOrigin = getParentOrigin();

 if (parentOrigin && ALLOWED_PARENT_ORIGINS.includes(parentOrigin)) {
   const eventType = isImage ? 'imageEditEnter' : 'editEnter';
   
   window.parent.postMessage({
     type: eventType,
     payload: { currentText: currentContent }
   }, parentOrigin);
 }
}

function handleGlobalEvent(event) {
  if (!document.getElementById('root')?.getAttribute('data-edit-mode-enabled')) {
    return;
  }

  if (event.target.closest('#inline-editor-popup')) {
    return;
  }

  const editableElement = findEditableElementAtPoint(event);

  if (editableElement) {
    event.preventDefault();
    event.stopPropagation();
    event.stopImmediatePropagation();

    if (event.type === 'click') {
      const editId = editableElement.getAttribute('data-edit-id');
      if (!editId) {
        console.warn('[INLINE EDITOR] Clicked element missing data-edit-id');
        return;
      }

      const isImage = editableElement.tagName.toLowerCase() === 'img';
      let currentContent = '';
      
      if (isImage) {
        currentContent = editableElement.getAttribute('src') || '';
      } else {
        currentContent = editableElement.textContent || '';
      }
      
      showPopup(editableElement, editId, currentContent, isImage);
    }
  } else {
    event.preventDefault();
    event.stopPropagation();
    event.stopImmediatePropagation();
  }
}

function getParentOrigin() {
  if (window.location.ancestorOrigins && window.location.ancestorOrigins.length > 0) {
    return window.location.ancestorOrigins[0];
  }
  
  if (document.referrer) {
    try {
      return new URL(document.referrer).origin;
    } catch (e) {
      console.warn('Invalid referrer URL:', document.referrer);
    }
  }
  
  return null;
}

async function handleEditSave(updatedText) {
  const newText = updatedText
  // Replacing characters that cause Babel parser to crash
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/{/g, '&#123;')
    .replace(/}/g, '&#125;')

  const { editId } = currentEditingInfo;

  try {
    const response = await fetch(PLUGIN_APPLY_EDIT_API_URL, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        editId: editId,
        newFullText: newText
      }),
    });

    const result = await response.json();
    if (result.success) {
      const parentOrigin = getParentOrigin();
      if (parentOrigin && ALLOWED_PARENT_ORIGINS.includes(parentOrigin)) {
        window.parent.postMessage({
          type: 'editApplied',
          payload: {
            editId: editId,
            fileContent: result.newFileContent,
            beforeCode: result.beforeCode,
            afterCode: result.afterCode,
          }
        }, parentOrigin);
      } else {
        console.error('Unauthorized parent origin:', parentOrigin);
      }
    } else {
      console.error(`[vite][visual-editor] Error saving changes: ${result.error}`);
    }
  } catch (error) {
    console.error(`[vite][visual-editor] Error during fetch for ${editId}:`, error);
  }
}

function createDisabledTooltip() {
  if (disabledTooltipElement) return;

  disabledTooltipElement = document.createElement('div');
  disabledTooltipElement.id = 'inline-editor-disabled-tooltip';
  document.body.appendChild(disabledTooltipElement);
}

function showDisabledTooltip(targetElement, isImage = false) {
  if (!disabledTooltipElement) createDisabledTooltip();

  disabledTooltipElement.textContent = isImage ? translations.disabledTooltipTextImage : translations.disabledTooltipText;
  
  if (!disabledTooltipElement.isConnected) {
    document.body.appendChild(disabledTooltipElement);
  }
  disabledTooltipElement.classList.add('tooltip-active');

  const tooltipWidth = disabledTooltipElement.offsetWidth;
  const tooltipHeight = disabledTooltipElement.offsetHeight;
  const rect = targetElement.getBoundingClientRect();

  // Ensures that tooltip is not off the screen with 5px margin
  let newLeft = rect.left + window.scrollX + (rect.width / 2) - (tooltipWidth / 2);
  let newTop = rect.bottom + window.scrollY + 5;

  if (newLeft < window.scrollX) {
    newLeft = window.scrollX + 5; 
  }
  if (newLeft + tooltipWidth > window.innerWidth + window.scrollX) {
    newLeft = window.innerWidth + window.scrollX - tooltipWidth - 5; 
  }
  if (newTop + tooltipHeight > window.innerHeight + window.scrollY) {
    newTop = rect.top + window.scrollY - tooltipHeight - 5; 
  }
  if (newTop < window.scrollY) {
    newTop = window.scrollY + 5; 
  }

  disabledTooltipElement.style.left = `${newLeft}px`;
  disabledTooltipElement.style.top = `${newTop}px`;
}

function hideDisabledTooltip() {
  if (disabledTooltipElement) {
    disabledTooltipElement.classList.remove('tooltip-active');
  }
}

function handleDisabledElementHover(event) {
  const isImage = event.currentTarget.tagName.toLowerCase() === 'img';

  showDisabledTooltip(event.currentTarget, isImage);
}

function handleDisabledElementLeave() {
  hideDisabledTooltip();
}

function handleDisabledGlobalHover(event) {
  const disabledElement = findDisabledElementAtPoint(event);
  if (disabledElement) {
    if (currentDisabledHoverElement !== disabledElement) {
      currentDisabledHoverElement = disabledElement;
      const isImage = disabledElement.tagName.toLowerCase() === 'img';
      showDisabledTooltip(disabledElement, isImage);
    }
  } else {
    if (currentDisabledHoverElement) {
      currentDisabledHoverElement = null;
      hideDisabledTooltip();
    }
  }
}

function enableEditMode() {
  document.getElementById('root')?.setAttribute('data-edit-mode-enabled', 'true');
  
  injectPopupStyles(); 
  
  if (!globalEventHandlers) {
    globalEventHandlers = {
      mousedown: handleGlobalEvent,
      pointerdown: handleGlobalEvent,
      click: handleGlobalEvent
    };
    
    Object.entries(globalEventHandlers).forEach(([eventType, handler]) => {
      document.addEventListener(eventType, handler, true);
    });
  }
  
  document.addEventListener('mousemove', handleDisabledGlobalHover, true);
  
  document.querySelectorAll('[data-edit-disabled]').forEach(el => {
    el.removeEventListener('mouseenter', handleDisabledElementHover);
    el.addEventListener('mouseenter', handleDisabledElementHover);
    el.removeEventListener('mouseleave', handleDisabledElementLeave);
    el.addEventListener('mouseleave', handleDisabledElementLeave);
  });
}

function disableEditMode() {
  document.getElementById('root')?.removeAttribute('data-edit-mode-enabled');

  hideDisabledTooltip();

  if (globalEventHandlers) {
    Object.entries(globalEventHandlers).forEach(([eventType, handler]) => {
      document.removeEventListener(eventType, handler, true);
    });
    globalEventHandlers = null;
  }
  
  document.removeEventListener('mousemove', handleDisabledGlobalHover, true);
  currentDisabledHoverElement = null;
  
  document.querySelectorAll('[data-edit-disabled]').forEach(el => {
    el.removeEventListener('mouseenter', handleDisabledElementHover);
    el.removeEventListener('mouseleave', handleDisabledElementLeave);
  });
}

window.addEventListener("message", function(event) {
  if (event.data?.type === "edit-save") {
    handleEditSave(event.data?.payload?.newText);
  }
  if (event.data?.type === "enable-edit-mode") {
    if (event.data?.translations) {
      translations = { ...translations, ...event.data.translations };
  }

    enableEditMode();
  }
  if (event.data?.type === "disable-edit-mode") {
    disableEditMode();
  }
});