'use client';

import { useState, useEffect, useRef } from 'react';

interface TickerActivity {
  ticketNumber: string;
  title: string;
  priority: number;
  statusLabel: string;
  companyName: string;
}

interface TickerProps {
  activities: TickerActivity[];
  speed: number;
}

export function Ticker({ activities, speed }: TickerProps) {
  const [isPaused, setIsPaused] = useState(false);
  const contentRef = useRef<HTMLDivElement>(null);
  const animationRef = useRef<number | null>(null);
  const positionRef = useRef(0);
  const lastTimeRef = useRef<number>(0);

  // Simple requestAnimationFrame animation that respects speed
  useEffect(() => {
    if (!contentRef.current) return;

    const animate = (timestamp: number) => {
      if (lastTimeRef.current === 0) {
        lastTimeRef.current = timestamp;
      }

      const deltaTime = timestamp - lastTimeRef.current;
      lastTimeRef.current = timestamp;

      if (!isPaused && contentRef.current) {
        // Move based on speed - higher speed = faster movement
        // Speed 10 = 20px/s, Speed 60 = 120px/s, Speed 100 = 200px/s
        const pixelsPerSecond = speed * 2;
        positionRef.current -= (pixelsPerSecond * deltaTime) / 1000;

        // Get the width of the first set
        const contentWidth = contentRef.current.scrollWidth / 2;

        // Reset when we've scrolled past the first set
        if (Math.abs(positionRef.current) >= contentWidth) {
          positionRef.current = 0;
        }

        contentRef.current.style.transform = `translateX(${positionRef.current}px)`;
      }

      animationRef.current = requestAnimationFrame(animate);
    };

    animationRef.current = requestAnimationFrame(animate);

    return () => {
      if (animationRef.current) {
        cancelAnimationFrame(animationRef.current);
      }
    };
  }, [speed, isPaused]);

  const getPriorityColor = (priority: number) => {
    if (priority <= 3) return 'text-red-500';
    if (priority <= 5) return 'text-orange-500';
    return 'text-blue-500';
  };

  const getPriorityIcon = (priority: number) => {
    if (priority <= 3) return '🔴';
    if (priority <= 5) return '🟠';
    return '🔵';
  };

  const getStatusColor = (statusLabel: string) => {
    const status = statusLabel?.toLowerCase() || '';
    if (status.includes('new') || status.includes('resource requested') || status.includes('end user note added')) {
      return 'text-red-500 font-bold';
    }
    if (status.includes('in progress')) {
      return 'text-green-500 font-bold';
    }
    return 'text-gray-500';
  };

  if (activities.length === 0) {
    return (
      <div className="fixed bottom-0 left-0 right-0 bg-black border-t-4 border-blue-600 h-24 flex items-center justify-center">
        <span className="text-gray-500">No recent ticket activity</span>
      </div>
    );
  }

  // Limit to 20 items for better performance on low-end hardware
  const limitedActivities = activities.slice(0, 20);

  return (
    <div 
      className="fixed bottom-0 left-0 right-0 bg-black border-t-4 border-blue-600 h-24 overflow-hidden"
      onMouseEnter={() => setIsPaused(true)}
      onMouseLeave={() => setIsPaused(false)}
    >
      <div
        ref={contentRef}
        className="flex items-center h-full whitespace-nowrap"
      >
        {/* Duplicate content for seamless loop */}
        {[...limitedActivities, ...limitedActivities].map((activity, index) => (
          <div
            key={`${activity.ticketNumber}-${index}`}
            className="inline-flex items-center mx-8 flex-shrink-0"
          >
            <div className="flex flex-col gap-1">
              {/* Line 1: Priority - Ticket Number - Company Name */}
              <div className="flex items-center text-xl">
                <span className="mr-2 text-2xl">{getPriorityIcon(activity.priority)}</span>
                <span className={`font-bold mr-2 ${getPriorityColor(activity.priority)}`}>
                  {activity.ticketNumber}
                </span>
                <span className="text-white mr-2">-</span>
                <span className="text-white font-semibold">
                  {activity.companyName}
                </span>
              </div>
              {/* Line 2: Title - Status */}
              <div className="flex items-center text-base">
                <span className="text-gray-400">{activity.title?.substring(0, 60) || ''}</span>
                <span className={`ml-2 ${getStatusColor(activity.statusLabel)}`}>- {activity.statusLabel || 'Unknown'}</span>
              </div>
            </div>
          </div>
        ))}
      </div>
    </div>
  );
}