'use client';

import * as React from 'react';
import { Timer } from 'lucide-react';
import { cn } from '@/lib/utils';
import { Button } from '@/components/ui/button';

interface ClockDurationPickerProps {
  duration: number; // Duration in minutes
  setDuration: (duration: number) => void;
  label?: string;
  isDark?: boolean;
  options?: number[]; // Optional custom duration options
}

export function ClockDurationPicker({ 
  duration, 
  setDuration, 
  label, 
  isDark = false,
  options = [15, 30, 45, 60, 75, 90, 105, 120] 
}: ClockDurationPickerProps) {
  const [isOpen, setIsOpen] = React.useState(false);
  const wrapperRef = React.useRef<HTMLDivElement>(null);

  // Close picker when clicking outside
  React.useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (wrapperRef.current && !wrapperRef.current.contains(event.target as Node)) {
        setIsOpen(false);
      }
    };

    if (isOpen) {
      document.addEventListener('mousedown', handleClickOutside);
    }

    return () => {
      document.removeEventListener('mousedown', handleClickOutside);
    };
  }, [isOpen]);

  // Handle duration selection
  const handleDurationClick = (selectedDuration: number) => {
    setDuration(selectedDuration);
    setIsOpen(false);
  };

  // Calculate position for clock numbers
  const getClockPosition = (index: number, total: number, radius: number = 130) => {
    const angle = (index * 360) / total - 90; // Start from top (-90 degrees)
    const radian = (angle * Math.PI) / 180;
    const x = Math.cos(radian) * radius;
    const y = Math.sin(radian) * radius;
    return { x, y };
  };

  // Format duration display
  const formatDuration = (minutes: number) => {
    if (minutes < 60) {
      return `${minutes}m`;
    }
    const hours = Math.floor(minutes / 60);
    const mins = minutes % 60;
    return mins > 0 ? `${hours}h ${mins}m` : `${hours}h`;
  };

  const displayDuration = duration ? formatDuration(duration) : 'Select duration';

  return (
    <div className="space-y-2">
      {label && (
        <label className={cn(
          "text-sm font-semibold",
          isDark ? "text-gray-300" : "text-gray-700"
        )}>
          {label}
        </label>
      )}
      <div className="relative w-full" ref={wrapperRef}>
        <Button
          type="button"
          variant="outline"
          onClick={() => setIsOpen(!isOpen)}
          className={cn(
            "w-full justify-start text-left font-normal h-12 text-base",
            !duration && "text-muted-foreground",
            isDark
              ? "bg-gray-800 border-gray-600 text-white hover:bg-gray-700"
              : "bg-white border-gray-300 text-gray-900 hover:bg-gray-50"
          )}
        >
          <Timer className="mr-2 h-5 w-5" />
          {displayDuration}
        </Button>
        {isOpen && (
          <div className={cn(
            "absolute z-[9999] top-full left-0 right-0 mt-2 rounded-lg shadow-xl border p-6 w-[420px] mx-auto overflow-visible",
            isDark
              ? "bg-gray-800 border-gray-700"
              : "bg-white border-gray-200"
          )}>
            {/* Clock face */}
            <div className="relative w-[360px] h-[360px] mx-auto my-6 overflow-visible">
              {/* Clock circle */}
              <div className={cn(
                "absolute inset-0 rounded-full border-2",
                isDark ? "border-gray-600" : "border-gray-300"
              )} />
              
              {/* Center dot */}
              <div className={cn(
                "absolute top-1/2 left-1/2 w-2 h-2 rounded-full -translate-x-1/2 -translate-y-1/2 z-10",
                isDark ? "bg-gray-400" : "bg-gray-600"
              )} />

              {/* Duration options arranged in a circle */}
              {options.map((option, index) => {
                const { x, y } = getClockPosition(index, options.length, 130);
                const isSelected = duration === option;
                return (
                  <button
                    key={option}
                    type="button"
                    onClick={() => handleDurationClick(option)}
                    className={cn(
                      "absolute w-16 h-16 rounded-full flex items-center justify-center text-xs font-semibold transition-all z-20 whitespace-nowrap",
                      isSelected
                        ? isDark
                          ? "bg-blue-600 text-white scale-110 shadow-lg ring-2 ring-blue-400"
                          : "bg-blue-600 text-white scale-110 shadow-lg ring-2 ring-blue-400"
                        : isDark
                        ? "bg-gray-700 text-gray-200 hover:bg-gray-600 hover:scale-105"
                        : "bg-gray-100 text-gray-700 hover:bg-gray-200 hover:scale-105"
                    )}
                    style={{
                      left: `calc(50% + ${x}px)`,
                      top: `calc(50% + ${y}px)`,
                      transform: 'translate(-50%, -50%)',
                    }}
                    title={`${option} minutes`}
                  >
                    {formatDuration(option)}
                  </button>
                );
              })}
            </div>

            {/* Quick select buttons for common durations */}
            <div className="flex gap-2 mt-4 justify-center flex-wrap">
              {[30, 60, 90, 120].map((quickDuration) => (
                <button
                  key={quickDuration}
                  type="button"
                  onClick={() => handleDurationClick(quickDuration)}
                  className={cn(
                    "px-3 py-1.5 rounded text-sm font-medium transition-colors",
                    duration === quickDuration
                      ? isDark
                        ? "bg-blue-600 text-white"
                        : "bg-blue-600 text-white"
                      : isDark
                      ? "bg-gray-700 text-gray-300 hover:bg-gray-600"
                      : "bg-gray-100 text-gray-700 hover:bg-gray-200"
                  )}
                >
                  {formatDuration(quickDuration)}
                </button>
              ))}
            </div>
          </div>
        )}
      </div>
    </div>
  );
}