const fs = require('fs');
let code = fs.readFileSync('src/components/TerminalPanel.vue', 'utf8');

// Replace standard touch handlers to use JS custom scrolling with deep logging
let newStart = `    onTouchKeyboardTouchStart = (event: TouchEvent) => {
      clearTouchScrollMomentum();
      if (event.touches.length > 0) {
        touchScrollLastY = event.touches[0]?.clientY || 0;
        touchScrollLastTime = performance.now();
        touchScrollVelocity = 0;
      }
      
      console.log("[Scroll] 👆 Touch START:", {
        y: touchScrollLastY,
        time: touchScrollLastTime.toFixed(1),
        viewportScrollTop: viewportScroller?.scrollTop
      });
      
      if (!helperTextarea) return;
      if (focusKeyboardTimerId !== null) {
        window.clearTimeout(focusKeyboardTimerId);
        focusKeyboardTimerId = null;
        clearFocusKeyboardBlurRecover();
        focusKeyboardInProgress = false;
      }
      helperTextarea.readOnly = true;
      if (DEBUG_TOUCH_FOCUS) {
        console.log("[TouchFocus] touchstart → readOnly=true (no blur)");
      }
    };`;

let newMove = `    onTouchKeyboardTouchMove = (event: TouchEvent) => {
      const hasSelection = hasActiveNativeSelectionInTerminal();
      if (hasSelection) {
        lastTouchAction = "PASS_NATIVE";
        event.stopImmediatePropagation();
        return;
      }
      
      const now = performance.now();
      const dt = now - touchScrollLastTime;
      const currentY = event.touches[0]?.clientY || 0;
      const dy = currentY - touchScrollLastY;
      
      // Stop xterm from intercepting this manually
      event.stopImmediatePropagation();

      if (viewportScroller && dt > 0) {
        const before = viewportScroller.scrollTop;
        if (dy !== 0) {
          // JS 强控滑动：完全跟手，零延迟
          viewportScroller.scrollTop -= dy;
        }

        // 计算物理滑动速度，用于释放后的动量
        const v = (-dy / dt) * 16; 
        if (touchScrollVelocity * v > 0) {
          touchScrollVelocity = touchScrollVelocity * 0.5 + v * 0.5;
        } else {
          touchScrollVelocity = v;
        }

        // 限制最大动量
        const touchMaxSpeed = 120; // 匹配原本常量
        if (touchScrollVelocity > touchMaxSpeed) touchScrollVelocity = touchMaxSpeed;
        else if (touchScrollVelocity < -touchMaxSpeed) touchScrollVelocity = -touchMaxSpeed;

        console.log(\`[Scroll] 🖐️ MOVE | 跟手延迟Δt=\${dt.toFixed(1)}ms | 手指位移Δy=\${dy.toFixed(1)}px | 渲染视口=\${before}→\${viewportScroller.scrollTop} | 当前算得速度v=\${v.toFixed(2)}\`);
      }

      touchScrollLastY = currentY;
      touchScrollLastTime = now;
    };`;

let newEnd = `    onTouchKeyboardTouchEnd = () => {
      console.log(\`[Scroll] 👇 Touch END | 释放时瞬时速度=\${touchScrollVelocity.toFixed(2)} | 最终 scrollTop: \${viewportScroller?.scrollTop}\`);
      
      // 添加阈值，防止极轻微误触引发滚动
      const threshold = 0.2;
      if (Math.abs(touchScrollVelocity) > threshold) {
        // 轻微乘子放大，提升顺滑手感
        touchScrollVelocity *= 1.35;
        console.log(\`[Scroll] 🚀 触发惯性滚动，起步速度=\${touchScrollVelocity.toFixed(2)}\`);
        runTouchScrollMomentum();
      } else {
        console.log(\`[Scroll] 🛑 速度太小(\${touchScrollVelocity.toFixed(2)})，不触发惯性\`);
      }
    };`;

code = code.replace(/onTouchKeyboardTouchStart = \(event: TouchEvent\) => \{[\s\S]*?\}\;\n    onTouchKeyboardTouchMove = \(event: TouchEvent\) => \{[\s\S]*?\}\;\n    onTouchKeyboardTouchEnd = \(\) => \{[\s\S]*?\}\;/m, 
  newStart + '\n' + newMove + '\n' + newEnd);

fs.writeFileSync('src/components/TerminalPanel.vue', code);