<template>
  <div class="scrollable-scene">
    <!-- 背景層 -->
    <div class="scene-background" :style="{ transform: `translateX(${-scrollPosition}px)` }">
      <!-- 遠景 -->
      <div class="bg-layer far-bg">
        <div class="cloud" style="left: 100px; top: 50px;"></div>
        <div class="cloud" style="left: 400px; top: 80px;"></div>
        <div class="cloud" style="left: 700px; top: 40px;"></div>
        <div class="mountain" style="left: 200px;"></div>
        <div class="mountain" style="left: 600px;"></div>
      </div>
      
      <!-- 中景 -->
      <div class="bg-layer mid-bg">
        <div class="tree" style="left: 150px;"></div>
        <div class="tree" style="left: 550px;"></div>
        <div class="tree" style="left: 900px;"></div>
      </div>
    </div>

    <!-- 前景 - 地面 -->
    <div class="scene-ground">
      <div class="grass-pattern"></div>
    </div>

    <!-- 寵物 -->
    <div 
      class="pet-character" 
      :class="[petEmotion, { walking: isWalking }]"
      :style="{ left: petPosition + 'px' }"
    >
      <div class="pet-body"></div>
    </div>

    <!-- 互動物件 -->
    <div class="scene-objects">
      <div class="object food-bowl" style="left: 300px;" @click="$emit('interact', 'food')">
        🍖
      </div>
      <div class="object toy" style="left: 500px;" @click="$emit('interact', 'toy')">
        🎾
      </div>
      <div class="object bed" style="left: 700px;" @click="$emit('interact', 'bed')">
        🛏️
      </div>
    </div>

    <!-- 捲軸控制 (開發用) -->
    <div class="scroll-controls">
      <button @click="scrollLeft" class="scroll-btn">◀</button>
      <button @click="scrollRight" class="scroll-btn">▶</button>
    </div>
  </div>
</template>

<script setup>
import { ref } from 'vue'

const props = defineProps({
  petEmotion: {
    type: String,
    default: 'happy'
  }
})

const emit = defineEmits(['interact'])

const scrollPosition = ref(0)
const petPosition = ref(200)
const isWalking = ref(false)

const scrollLeft = () => {
  if (scrollPosition.value > 0) {
    scrollPosition.value = Math.max(0, scrollPosition.value - 100)
  }
}

const scrollRight = () => {
  if (scrollPosition.value < 600) {
    scrollPosition.value = Math.min(600, scrollPosition.value + 100)
  }
}

// 自動移動寵物 (示例)
setInterval(() => {
  const randomMove = Math.random() > 0.5
  if (randomMove) {
    isWalking.value = true
    petPosition.value += (Math.random() - 0.5) * 50
    petPosition.value = Math.max(50, Math.min(750, petPosition.value))
    
    setTimeout(() => {
      isWalking.value = false
    }, 1000)
  }
}, 3000)
</script>

<style scoped>
.scrollable-scene {
  width: 100%;
  height: 400px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #87CEEB 0%, #E0F6FF 60%, #98D8C8 100%);
  border: 4px solid #5a4a3a;
  border-radius: 16px;
}

/* 手機直向 */
@media (max-width: 480px) {
  .scrollable-scene {
    height: 280px;
    border: 3px solid #5a4a3a;
    border-radius: 12px;
  }
}

/* 手機橫向 */
@media (max-width: 768px) and (orientation: landscape) {
  .scrollable-scene {
    height: 220px;
  }
}

/* 平板 */
@media (min-width: 481px) and (max-width: 768px) {
  .scrollable-scene {
    height: 320px;
  }
}

.scene-background {
  position: absolute;
  width: 1200px;
  height: 100%;
  transition: transform 0.3s ease;
}

.bg-layer {
  position: absolute;
  width: 100%;
  height: 100%;
}

/* 雲朵 */
.cloud {
  position: absolute;
  width: 80px;
  height: 40px;
  background: white;
  border-radius: 50px;
  opacity: 0.8;
  animation: float 20s infinite linear;
}

.cloud::before,
.cloud::after {
  content: '';
  position: absolute;
  background: white;
  border-radius: 50%;
}

.cloud::before {
  width: 50px;
  height: 50px;
  top: -25px;
  left: 10px;
}

.cloud::after {
  width: 60px;
  height: 45px;
  top: -20px;
  right: 10px;
}

@keyframes float {
  from { transform: translateX(0); }
  to { transform: translateX(100px); }
}

/* 山 */
.mountain {
  position: absolute;
  bottom: 50px;
  width: 0;
  height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-bottom: 150px solid #95a5a6;
}

/* 樹 */
.tree {
  position: absolute;
  bottom: 80px;
  width: 20px;
  height: 60px;
  background: #8B4513;
  border-radius: 4px;
}

.tree::before {
  content: '';
  position: absolute;
  top: -30px;
  left: -20px;
  width: 60px;
  height: 60px;
  background: #55efc4;
  border-radius: 50%;
}

/* 地面 */
.scene-ground {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(180deg, #6ab04c 0%, #4cd137 100%);
  border-top: 3px solid #5a4a3a;
}

.grass-pattern {
  width: 100%;
  height: 100%;
  background-image: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 10px,
    rgba(0, 0, 0, 0.05) 10px,
    rgba(0, 0, 0, 0.05) 20px
  );
}

/* 寵物 */
.pet-character {
  position: absolute;
  bottom: 80px;
  width: 80px;
  height: 80px;
  transition: left 0.5s ease;
  z-index: 10;
}

.pet-body {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #ff6b9d 0%, #ff8fab 100%);
  border: 3px solid #5a4a3a;
  border-radius: 50%;
  position: relative;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.2);
}

.pet-body::before,
.pet-body::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: #2d3436;
  border-radius: 50%;
  top: 20px;
}

.pet-body::before {
  left: 15px;
}

.pet-body::after {
  right: 15px;
}

.pet-character.walking .pet-body {
  animation: bounce 0.5s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* 互動物件 */
.scene-objects {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.object {
  position: absolute;
  bottom: 80px;
  font-size: 32px;
  cursor: pointer;
  pointer-events: all;
  transition: transform 0.2s;
}

.object:hover {
  transform: scale(1.2);
}

/* 捲軸控制 */
.scroll-controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  z-index: 20;
}

.scroll-btn {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.9);
  border: 3px solid #5a4a3a;
  border-radius: 8px;
  font-size: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.scroll-btn:hover {
  background: #ffeaa7;
  transform: scale(1.1);
}

.scroll-btn:active {
  transform: scale(0.95);
}
</style>
