"use client"
import type React from "react"
import { useState, useEffect } from "react"
import { useHistory } from "react-router-dom"

import BottomNavigation from "../components/BottomNavigation"


const Exercise: React.FC = () => {
  const history = useHistory()
  // const { id } = useParams<{ id: string }>()
  const [isPlaying, setIsPlaying] = useState(false)
  const [currentTime, setCurrentTime] = useState(0)
  const [totalTime] = useState(900) // 15 minutes in seconds
  const [currentSet, setCurrentSet] = useState(1)
  const [totalSets] = useState(3)

  useEffect(() => {
    let interval: NodeJS.Timeout | undefined
    if (isPlaying) {
      interval = setInterval(() => {
        setCurrentTime((prev) => {
          if (prev >= totalTime) {
            setIsPlaying(false)
            // Show completion animation
            history.push("/course-complete")
            return totalTime
          }
          return prev + 1
        })
      }, 1000)
    }
    return () => {
      if (interval) clearInterval(interval)
    }
  }, [isPlaying, totalTime, history])

  const formatTime = (seconds: number) => {
    const mins = Math.floor(seconds / 60)
    const secs = seconds % 60
    return `${mins.toString().padStart(2, "0")}:${secs.toString().padStart(2, "0")}`
  }

  const progress = (currentTime / totalTime) * 100

  // SVG Icons
  const BackIcon = () => (
    <svg className="w-6 h-6 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
    </svg>
  )

  const HeartIcon = () => (
    <svg className="w-6 h-6 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
      <path
        strokeLinecap="round"
        strokeLinejoin="round"
        strokeWidth={2}
        d="M4.318 6.318a4.5 4.5 0 000 6.364L12 20.364l7.682-7.682a4.5 4.5 0 00-6.364-6.364L12 7.636l-1.318-1.318a4.5 4.5 0 00-6.364 0z"
      />
    </svg>
  )

  const PlayIcon = () => (
    <svg className="w-10 h-10 text-white" fill="currentColor" viewBox="0 0 24 24">
      <path d="M8 5v14l11-7z" />
    </svg>
  )

  const PauseIcon = () => (
    <svg className="w-10 h-10 text-white" fill="currentColor" viewBox="0 0 24 24">
      <path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z" />
    </svg>
  )

  const RefreshIcon = () => (
    <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="#6F6F6F" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"> <path d="M2.5 2v6h6M21.5 22v-6h-6" /><path d="M22 11.5A10 10 0 0 0 3.2 7.2M2 12.5a10 10 0 0 0 18.8 4.2" /></svg>
  )

  const CheckIcon = () => (
    <svg className="w-6 h-6 text-cyan-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={3} d="M5 13l4 4L19 7" />
    </svg>
  )

  const exerciseSteps = [
    {
      title: "Исходное положение",
      description:
        "Лягте на спирку на коврик. Руки вдоль тела, ладони прижаты к полу. Ноги выпрямлены, носки направлены вверх. Поясница плотно прижата к полу.",
      icon: "1",
    },
    {
      title: "Задание",
      description:
        "Медленно поднимите прямые ноги до угла 90 градусов. Задержитесь на 2 секунды, затем медленно опустите ноги, не касаясь пола. Повторите движение плавно и контролируемо.",
      icon: "2",
    },
    {
      title: "Подходы",
      description: "Выполните 3 подхода по 12 повторений с отдыхом 60 секунд между подходами.",
      icon: "3",
    },
    {
      title: "Перерыв",
      description: "Отдыхайте 60 секунд между подходами. Дышите спокойно и расслабьте мышцы.",
      icon: "4",
    },
    {
      title: "Динамика и статика",
      description:
        "Динамическая фаза: подъем и опускание ног выполняется плавно, 2 секунды вверх, 2 секунды вниз. Статическая фаза: удержание ног в верхней точке на 2 секунды.",
      icon: "5",
    },
  ]

  return (

    <div className="bg-gray-100 max-w-4xl mx-auto mb-50 overflow_auto">


      {/* Header */}
      <div className="fixed top-0 left-0 right-0 bg-gradient-to-br from-[#3ABBC7] to-[#0D212C] p-4 z-50 shadow-lg rounded-b-3xl">
        <div className="absolute inset-0 bg-gradient-to-r from-black/10 to-transparent"></div>
        
        <div className="relative px-4 sm:px-6 py-4 max-w-4xl mx-auto flex flex-row justify-between">


          <button
            onClick={() => history.goBack()}
            className="w-12 h-12 glass-morphism rounded-2xl flex items-center justify-center border border-white/30 hover:bg-white/30 transition-all duration-300 shadow-lg"
          >
            <svg className="w-6 h-6 text-white transform rotate-180" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7L15 5" />
            </svg>
          </button>
          <div className="text-center">

            <h1 className="text-xl sm:text-2xl font-semibold text-white">Подъемы ног лежа</h1>
            <p className="text-cyan-100 text-sm font-medium">Упражнение 1 из 12</p>
          </div>

          <button
            onClick={() => history.goBack()}
            className="w-12 h-12 glass-morphism rounded-2xl flex items-center justify-center border border-white/30 hover:bg-white/30 transition-all duration-300 shadow-lg ml-auto"
          >
            <svg className="w-6 h-6 text-white transform rotate-180" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7L15 5" />
            </svg>
          </button>
        </div>
      </div>




      {/* Header */}
      <div className="sticky top-0 z-40 bg-gradient-to-br from-[#3ABBC7] to-[#0D212C] backdrop-blur-xl pt-40 pb-4 px-4 sm:px-6">
        <div className="flex items-center justify-between mb-4">
          <button
            onClick={() => history.goBack()}
            className="w-12 h-12 glass-morphism rounded-2xl flex items-center justify-center border border-white/30 hover:bg-white/30 transition-all duration-300 shadow-lg"
          >
            <BackIcon />
          </button>
          <div className="text-center">
            <h1 className="text-lg sm:text-xl font-black text-white">Подъемы ног лежа</h1>
            <p className="text-white/80 text-sm font-medium">Упражнение 1 из 12</p>
          </div>
          <div className="w-12 h-12 glass-morphism rounded-2xl flex items-center justify-center border border-white/30 shadow-lg">
            <HeartIcon />
          </div>
        </div>
        {/* Set Counter */}
        <div className="flex justify-center space-x-2 mt-4">
          {Array.from({ length: totalSets }).map((_, index) => (
            <div
              key={index}
              className={`w-8 h-8 rounded-full flex items-center justify-center font-bold text-sm transition-all duration-300 ${index + 1 <= currentSet
                  ? "bg-white text-[#2BACBE] shadow-lg scale-110 ring-2 ring-white"
                  : "bg-gray-100 text-gray-600 border border-gray-200"
                }`}
            >
              {index + 1}
            </div>
          ))}
        </div>
      </div>


      {/* Video/Image Section */}
      <div className="px-4 sm:px-6 mt-10 mb-6">
        <div className="glass-morphism rounded-3xl overflow-hidden shadow-2xl border border-white/20 backdrop-blur-2xl">
          <div className="relative">
            <img
              src="/placeholder.svg?height=250&width=400"
              alt="Exercise demonstration"
              className="w-full h-56 sm:h-64 object-cover"
            />
            <div className="absolute inset-0 bg-gradient-to-t from-black/30 via-transparent to-black/10"></div>
            <div className="absolute inset-0 flex items-center justify-center">
              <button
                onClick={() => setIsPlaying(!isPlaying)}
                className="w-20 h-20 bg-white/90 backdrop-blur-xl rounded-full flex items-center justify-center shadow-2xl hover:bg-white transition-all duration-300 transform hover:scale-110 border border-white/50"
              >
                {isPlaying ? <PauseIcon /> : <PlayIcon />}
              </button>
            </div>
            {/* Live indicators */}
            {isPlaying && (
              <div className="absolute top-4 left-4 flex items-center space-x-2">
                <div className="w-3 h-3 bg-red-500 rounded-full animate-pulse"></div>
                <span className="text-white text-sm font-bold bg-black/30 px-3 py-1 rounded-full backdrop-blur-sm">
                  LIVE
                </span>
              </div>
            )}
            {/* Timer Display */}
            <div className="absolute top-4 right-4 bg-white/90 backdrop-blur-sm px-3 py-1 rounded-xl">
              <span className="text-gray-800 text-sm font-bold">{formatTime(currentTime)}</span>
            </div>
          </div>
        </div>
      </div>
      {/* Exercise Steps - Vertical Scroll */}
      <div className="px-4 sm:px-6 space-y-4 mb-6">
        {exerciseSteps.map((step, index) => (
          <div
            key={index}
            className="bg-white rounded-2xl p-5 border border-gray-200 shadow-lg hover:shadow-xl transition-all duration-300"
          >
            <div className="flex items-start space-x-4">
              <div
                className={`w-12 h-12 bg-gray-100 rounded-xl flex items-center justify-center shadow-sm flex-shrink-0 text-[#2BACBE] font-black text-xl border border-gray-200`}
              >
                {step.icon}
              </div>
              <div>
                <h3 className="text-lg font-black text-gray-800 mb-2">{step.title}</h3>
                <p className="text-gray-600 leading-relaxed text-sm sm:text-base">{step.description}</p>
              </div>
            </div>
          </div>
        ))}
      </div>
      {/* Important Notes */}
      <div className="px-4 sm:px-6 mb-32">
        <div className="bg-white rounded-2xl p-5 border border-gray-200 shadow-lg">
          <div className="flex items-start space-x-3">
            <div className="w-8 h-8 bg-amber-400/20 rounded-full flex items-center justify-center flex-shrink-0">
              <span className="text-amber-400 font-bold text-sm">!</span>
            </div>
            <div>
              <h3 className="text-lg font-black text-gray-800 mb-2">Важные замечания</h3>
              <ul className="space-y-1 text-gray-600 text-sm">
                <li>• Не отрывайте поясницу от пола</li>
                <li>• Дышите равномерно, не задерживайте дыхание</li>
                <li>• При болевых ощущениях немедленно прекратите</li>
                <li>• Движения должны быть плавными и контролируемыми</li>
              </ul>
            </div>
          </div>
        </div>
      </div>
      {/* Fixed Timer at Bottom */}
      <div className="fixed bottom-36 left-0 right-0 glass-morphism border-t border-white/20 px-4 sm:px-6 py-4 shadow-2xl z-30">
        <div className="max-w-md mx-auto">
          <div className="flex items-center justify-between mb-3">
            <div className="flex items-center space-x-2">
              <div className="w-2 h-2 bg-green-400 rounded-full animate-pulse"></div>
              <span className="text-sm font-bold text-gray-700">
                Подход {currentSet} из {totalSets}
              </span>
            </div>
            <span className="text-sm font-black text-gray-700">
              {formatTime(currentTime)} / {formatTime(totalTime)}
            </span>
          </div>
          <div className="bg-white/30 rounded-full h-3 mb-4 overflow-hidden">
            <div
              className="bg-gradient-to-r from-[#2BACBE] via-cyan-500 to-cyan-700 h-3 rounded-full transition-all duration-1000 shadow-sm"
              style={{ width: `${progress}%` }}
            ></div>
          </div>
          <div className="flex space-x-3">
            <button
              onClick={() => setIsPlaying(!isPlaying)}
              className={`flex-1 font-bold py-3 px-4 rounded-xl transition-all duration-300 transform hover:scale-105 flex items-center justify-center space-x-2 ${isPlaying
                  ? "bg-gray-400 text-white shadow-lg"
                  : "bg-[#2BACBE] hover:bg-[#2099A8] text-white shadow-lg"
                }`}
            >
              {isPlaying ? (
                <>
                  <PauseIcon /> <span>Пауза</span>
                </>
              ) : (
                <>
                  <PlayIcon /> <span>Начать</span>
                </>
              )}
            </button>
            <button
              onClick={() => {
                setCurrentTime(0)
                setIsPlaying(false)
              }}
              className="px-6 py-3 bg-white text-gray-800 font-bold rounded-xl transition-all duration-300 hover:shadow-lg border border-gray-200 flex items-center justify-center"
            >
              <RefreshIcon />
            </button>
            <button
              onClick={() => setCurrentSet((prev) => Math.min(prev + 1, totalSets))}
              className="px-6 py-3 bg-white text-gray-800 font-bold rounded-xl transition-all duration-300 hover:shadow-lg border border-gray-200 flex items-center justify-center"
            >
              <CheckIcon />
            </button>
          </div>
        </div>
      </div>
      <BottomNavigation />
    </div>
  )
}

export default Exercise