'use client'

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

const TOWER_META = [
  { type: 'intern', name: '00后实习生', cost: 50, desc: '近战 15伤 1.5/s', color: '#22C55E', img: '/game-assets/tower-intern.png', tip: '整顿职场：5%概率秒杀' },
  { type: 'senior', name: 'P6资深开发', cost: 120, desc: '远程 30伤 5格射程', color: '#3B82F6', img: '/game-assets/tower-senior.png', tip: '代码屎山：附带持续伤害' },
  { type: 'ppt', name: 'PPT大师', cost: 100, desc: 'AOE减速 5伤', color: '#F59E0B', img: '/game-assets/tower-ppt.png', tip: '黑话领域：减速40%' },
  { type: 'hrbp', name: 'HRBP', cost: 80, desc: '辅助 +20%攻速', color: '#EC4899', img: '/game-assets/tower-hrbp.png', tip: '打鸡血：周围塔攻速+20%' },
] as const

type TowerType = 'intern' | 'senior' | 'ppt' | 'hrbp'

export default function GamePage() {
  const gameRef = useRef<{ destroy: (removeCanvas: boolean) => void } | null>(null)
  const [hc, setHc] = useState(200)
  const [selectedTower, setSelectedTower] = useState<TowerType | null>(null)
  const [gameReady, setGameReady] = useState(false)
  // expose setter to game scene via window
  const selectedTowerRef = useRef<TowerType | null>(null)

  const handleSelectTower = useCallback((type: TowerType) => {
    const next = selectedTowerRef.current === type ? null : type
    selectedTowerRef.current = next
    setSelectedTower(next)
    // notify scene
    if (typeof window !== 'undefined') {
      (window as any).__gameSelectTower?.(next)
    }
  }, [])

  useEffect(() => {
    let mounted = true

    const initGame = async () => {
      const Phaser = (await import('phaser')).default
      const { createGameConfig } = await import('@/game/config')
      const { createGameScene } = await import('@/game/GameScene')

      if (!mounted) return

      const GameScene = createGameScene(Phaser)
      const config = createGameConfig('game-canvas-container')
      config.scene = [GameScene]

      if (config.scale) {
        config.scale.mode = Phaser.Scale.FIT
        config.scale.autoCenter = Phaser.Scale.CENTER_BOTH
      }
      config.type = Phaser.AUTO

      // expose HC update to React
      if (typeof window !== 'undefined') {
        (window as any).__gameOnHCChange = (val: number) => {
          if (mounted) setHc(val)
        }
        (window as any).__gameOnTowerDeselect = () => {
          if (mounted) {
            selectedTowerRef.current = null
            setSelectedTower(null)
          }
        }
        ;(window as any).__gameReady = () => {
          if (mounted) setGameReady(true)
        }
      }

      gameRef.current = new Phaser.Game(config)
    }

    initGame().catch(console.error)

    return () => {
      mounted = false
      gameRef.current?.destroy(true)
      gameRef.current = null
      if (typeof window !== 'undefined') {
        delete (window as any).__gameOnHCChange
        delete (window as any).__gameOnTowerDeselect
        delete (window as any).__gameSelectTower
        delete (window as any).__gameReady
      }
    }
  }, [])

  return (
    <div
      className="w-full h-screen flex flex-col overflow-hidden"
      style={{ backgroundColor: '#0A1628' }}
    >
      {/* Phaser canvas 区域，flex-1 填满剩余高度 */}
      <div
        id="game-canvas-container"
        className="flex-1 min-h-0 w-full"
        style={{ backgroundColor: '#0A1628' }}
      />

      {/* 底部塔选择面板 — 纯 React DOM，不被 Canvas 遮挡 */}
      <div
        style={{
          backgroundColor: 'rgba(10,18,40,0.97)',
          borderTop: '2px solid #1e3a5f',
          padding: '8px 16px',
          display: 'flex',
          gap: '10px',
          justifyContent: 'center',
          alignItems: 'center',
          flexShrink: 0,
          zIndex: 50,
          boxShadow: '0 -4px 20px rgba(124,58,237,0.15)',
        }}
      >
        {/* 选塔提示 */}
        <div style={{ fontFamily: "'Press Start 2P', monospace", fontSize: '8px', color: '#7C3AED', marginRight: '8px', whiteSpace: 'nowrap', opacity: gameReady ? 1 : 0.3 }}>
          {selectedTower ? '点击格子建造' : '选择塔 ▼'}
        </div>

        {TOWER_META.map((meta) => {
          const canAfford = hc >= meta.cost
          const isSelected = selectedTower === meta.type
          return (
            <button
              key={meta.type}
              title={meta.tip}
              onClick={() => canAfford && handleSelectTower(meta.type)}
              disabled={!canAfford}
              style={{
                display: 'flex',
                flexDirection: 'column',
                alignItems: 'center',
                gap: '3px',
                padding: '6px 10px',
                backgroundColor: isSelected ? '#1e3a5f' : '#0F1B2D',
                border: `2px solid ${isSelected ? meta.color : '#1e3a5f'}`,
                borderRadius: '8px',
                cursor: canAfford ? 'pointer' : 'not-allowed',
                minWidth: '90px',
                opacity: canAfford ? 1 : 0.4,
                transition: 'all 0.15s ease',
                boxShadow: isSelected ? `0 0 12px ${meta.color}66` : 'none',
                transform: isSelected ? 'translateY(-3px)' : 'none',
              }}
            >
              {/* 角色图片 */}
              <div style={{ width: '48px', height: '48px', position: 'relative', flexShrink: 0 }}>
                {/* eslint-disable-next-line @next/next/no-img-element */}
                <img
                  src={meta.img}
                  alt={meta.name}
                  style={{ width: '100%', height: '100%', objectFit: 'contain', imageRendering: 'auto' }}
                />
              </div>
              {/* 名称 */}
              <span style={{ fontFamily: 'VT323, monospace', fontSize: '13px', color: meta.color, textAlign: 'center', lineHeight: 1.1 }}>
                {meta.name}
              </span>
              {/* 费用 */}
              <span style={{ fontFamily: "'Press Start 2P', monospace", fontSize: '8px', color: '#A78BFA' }}>
                {meta.cost} HC
              </span>
              {/* 描述 */}
              <span style={{ fontFamily: 'VT323, monospace', fontSize: '11px', color: '#64748B', textAlign: 'center' }}>
                {meta.desc}
              </span>
            </button>
          )
        })}
      </div>
    </div>
  )
}