// ==UserScript==
// @name         GitLab Reviewer Shortcut
// @namespace    kayw
// @version      1.0
// @license      MIT
// @description  Adds keyboard shortcuts to quickly assign reviewers in GitLab MRs
// @match        https://*.gitlab.com/*
// @match        http://*.gitlab.com/*
// @match        https://gitlab.*/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
  // Key for storing reviewer name in localStorage
  const REVIEWER_KEY = 'gitlab_default_reviewer';
  
  // Initialize or get saved reviewer
  let defaultReviewer = localStorage.getItem(REVIEWER_KEY);
  
  // Create configuration interface
  function createConfigInterface() {
    // Check if config panel already exists
    if (document.getElementById('reviewer-config-panel')) {
      return;
    }
    
    // Create config panel
    const panel = document.createElement('div');
    panel.id = 'reviewer-config-panel';
    panel.style.cssText = `
      position: fixed;
      top: 20px;
      right: 20px;
      background: white;
      border: 1px solid #ccc;
      border-radius: 5px;
      padding: 15px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      z-index: 9999;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    `;
    
    // Add title
    const title = document.createElement('h3');
    title.textContent = 'Configure Default Reviewer';
    title.style.margin = '0 0 10px 0';
    panel.appendChild(title);
    
    // Add input field
    const input = document.createElement('input');
    input.type = 'text';
    input.value = defaultReviewer;
    input.placeholder = 'Username without @';
    input.style.cssText = `
      width: 100%;
      padding: 5px;
      margin-bottom: 10px;
      border: 1px solid #ddd;
      border-radius: 3px;
    `;
    panel.appendChild(input);
    
    // Add save button
    const saveBtn = document.createElement('button');
    saveBtn.textContent = 'Save';
    saveBtn.style.cssText = `
      background: #1f75cb;
      color: white;
      border: none;
      padding: 5px 10px;
      border-radius: 3px;
      cursor: pointer;
      margin-right: 5px;
    `;
    saveBtn.onclick = function() {
      defaultReviewer = input.value.trim().replace('@', ''); // Remove @ prefix if present
      localStorage.setItem(REVIEWER_KEY, defaultReviewer);
      panel.remove();
      alert(`Default reviewer set to: @${defaultReviewer}`);
    };
    panel.appendChild(saveBtn);
    
    // Add cancel button
    const cancelBtn = document.createElement('button');
    cancelBtn.textContent = 'Cancel';
    cancelBtn.style.cssText = `
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 5px 10px;
      border-radius: 3px;
      cursor: pointer;
    `;
    cancelBtn.onclick = function() {
      panel.remove();
    };
    panel.appendChild(cancelBtn);
    
    // Add to page
    document.body.appendChild(panel);
    
    // Focus input field
    input.focus();
    input.select();
  }
  
  // Register keyboard shortcuts
  document.addEventListener('keydown', function(event) {
    // Ctrl+Shift+R to open config interface
    if ((event.ctrlKey || event.metaKey) && event.shiftKey && event.key === 'r') {
      event.preventDefault();
      createConfigInterface();
      return;
    }
    
    // Ctrl+R to assign reviewer
    if ((event.ctrlKey || event.metaKey) && !event.shiftKey && event.key === 'r') {
      // Prevent browser refresh
      event.preventDefault();
      
      // Simulate pressing 'r' key to focus GitLab comment input
      const rKeyEvent = new KeyboardEvent('keydown', {
        key: 'r',
        code: 'KeyR',
        keyCode: 82,
        which: 82,
        bubbles: true
      });
      document.dispatchEvent(rKeyEvent);
      
      // Wait for input to get focus
      setTimeout(function() {
        // Find comment input field
        const commentInput = document.querySelector('.js-comment-input, .note-textarea');
        
        if (commentInput) {
          // Focus the input
          commentInput.focus();
          
          // Set text to assign reviewer
          commentInput.value = `/assign_reviewer @${defaultReviewer}`;
          
          // Trigger input event for GitLab to recognize the change
          commentInput.dispatchEvent(new Event('input', { bubbles: true }));
          
          // Simulate Command+Enter to submit
          setTimeout(function() {
            const cmdEnterEvent = new KeyboardEvent('keydown', {
              key: 'Enter',
              code: 'Enter',
              keyCode: 13,
              which: 13,
              metaKey: true,
              bubbles: true
            });
            commentInput.dispatchEvent(cmdEnterEvent);
          }, 100);
        }
      }, 200);
    }
  });
  
  // Add initialization message
  console.log(`GitLab reviewer shortcut initialized. Current reviewer: @${defaultReviewer}`);
  console.log('Use Ctrl+R (or Cmd+R) to assign reviewer');
  console.log('Use Ctrl+Shift+R (or Cmd+Shift+R) to configure default reviewer');
})();