import { describe, it, expect } from 'vitest'
import { resolveGroundItemSpriteRect } from '../src/ui/inventory.ts'
import { BAKED_UI_MANIFEST } from '../src/ui/baked-ui-meta.ts'
import { drawGroundItem } from '../src/scene/act-scene.ts'
import type { GroundItemEntity } from '../src/game/ground-items.ts'
import type { SpriteRenderer } from '../src/render/renderer.ts'
import { GameEngine } from '../src/game/engine.ts'

describe('Authentic Diablo II v1.13c Ground Items Flippy Parity', () => {
  describe('1. Flippy File Resolution Parity', () => {
    it('resolves authentic flippy ground sprites for weapons and armor', () => {
      const sword = resolveGroundItemSpriteRect({ code: 'ssd', name: 'Short Sword' })
      expect(sword).toBeDefined()
      expect(sword).not.toBeNull()
      expect(sword).toEqual(BAKED_UI_MANIFEST.flippyRects['flpssd'])
      expect(sword!.w).toBe(27)
      expect(sword!.h).toBe(9)

      const axe = resolveGroundItemSpriteRect({ code: 'hax', name: 'Hand Axe' })
      expect(axe).toEqual(BAKED_UI_MANIFEST.flippyRects['flphax'])
      expect(axe!.w).toBe(9)
      expect(axe!.h).toBe(13)

      const cap = resolveGroundItemSpriteRect({ code: 'cap', name: 'Cap' })
      expect(cap).toEqual(BAKED_UI_MANIFEST.flippyRects['flpcap'])
      expect(cap!.w).toBe(11)
      expect(cap!.h).toBe(8)
    })

    it('resolves gold piles into 4 authentic DC6 group sizes based on gold amount', () => {
      // Group 0: small pile (< 100 gold)
      const small = resolveGroundItemSpriteRect({ isGold: true, amount: 45, code: 'gld' })
      expect(small).toEqual(BAKED_UI_MANIFEST.flippyRects['flpgld_0'])
      expect(small!.w).toBe(24)
      expect(small!.h).toBe(7)

      // Group 1: medium pile (100 - 499 gold)
      const medium = resolveGroundItemSpriteRect({ isGold: true, amount: 250, code: 'gld' })
      expect(medium).toEqual(BAKED_UI_MANIFEST.flippyRects['flpgld_1'])
      expect(medium!.w).toBe(26)
      expect(medium!.h).toBe(13)

      // Group 2: large pile (500 - 4999 gold)
      const large = resolveGroundItemSpriteRect({ isGold: true, amount: 1500, code: 'gld' })
      expect(large).toEqual(BAKED_UI_MANIFEST.flippyRects['flpgld_2'])
      expect(large!.w).toBe(32)
      expect(large!.h).toBe(20)

      // Group 3: huge pile (>= 5000 gold)
      const huge = resolveGroundItemSpriteRect({ isGold: true, amount: 10000, code: 'gld' })
      expect(huge).toEqual(BAKED_UI_MANIFEST.flippyRects['flpgld_3'])
      expect(huge!.w).toBe(46)
      expect(huge!.h).toBe(23)
    })

    it('resolves potions, scrolls, and runes to authentic flippy files', () => {
      const redPotion = resolveGroundItemSpriteRect({ code: 'hp1', name: 'Lesser Healing Potion' })
      expect(redPotion).toEqual(BAKED_UI_MANIFEST.flippyRects['flprps'])

      const bluePotion = resolveGroundItemSpriteRect({ code: 'mp1', name: 'Lesser Mana Potion' })
      expect(bluePotion).toEqual(BAKED_UI_MANIFEST.flippyRects['flpbps'])

      const rune = resolveGroundItemSpriteRect({ code: 'r01', name: 'El Rune' })
      expect(rune).toEqual(BAKED_UI_MANIFEST.flippyRects['flprun'])
      expect(rune!.w).toBe(4)
      expect(rune!.h).toBe(4)

      const tpScroll = resolveGroundItemSpriteRect({ code: 'tsc', name: 'Town Portal Scroll' })
      expect(tpScroll).toEqual(BAKED_UI_MANIFEST.flippyRects['flpbsc'])
    })

    it('resolves unique items and charms to authentic ground art', () => {
      const anni = resolveGroundItemSpriteRect({ code: 'cm1', name: 'Annihilus' })
      expect(anni).toEqual(BAKED_UI_MANIFEST.flippyRects['flpmss'])

      const torch = resolveGroundItemSpriteRect({ code: 'cm2', name: 'Hellfire Torch' })
      expect(torch).toEqual(BAKED_UI_MANIFEST.flippyRects['flptrch'])

      const cube = resolveGroundItemSpriteRect({ code: 'box', name: 'Horadric Cube' })
      expect(cube).toEqual(BAKED_UI_MANIFEST.flippyRects['flpbox'])
    })

    it('resolves color-transformed items to dyed ground flippy sprites', () => {
      const shako = resolveGroundItemSpriteRect({
        code: 'uap',
        invFile: 'invcap',
        invtransform: 'cgrn',
        name: 'Harlequin Crest',
      })
      expect(shako).toEqual(BAKED_UI_MANIFEST.flippyRects['flpcap_cgrn'])
    })
  })

  describe('2. Ground Item Rendering with Atlas Parity', () => {
    it('renders authentic Blizzard flippy sprite with 1:1 isometric dimensions and ground shadow', () => {
      const drawnQuads: { x: number; y: number; w: number; h: number; color: readonly [number, number, number, number] }[] = []
      const drawnSprites: { frame: any; x: number; y: number; options: any }[] = []
      const renderer = {
        drawSolid(x: number, y: number, w: number, h: number, color: readonly [number, number, number, number]) {
          drawnQuads.push({ x, y, w, h, color })
        },
        draw(frame: any, x: number, y: number, options: any) {
          drawnSprites.push({ frame, x, y, options })
        },
      } as unknown as SpriteRenderer

      const mockAtlas = { texture: {} as any, width: 1024, height: 2145 } as any
      const groundSword: GroundItemEntity = {
        id: 'ground_sword_test',
        item: { name: 'Short Sword', code: 'ssd' },
        name: 'Short Sword',
        nameZh: '短剑',
        quality: 'magic',
        isGold: false,
        amount: 1,
        invWidth: 1,
        invHeight: 3,
        dropTime: 0,
        x: 300,
        y: 250,
        cellX: 0,
        cellY: 0,
        sparklePhase: 0,
      }

      drawGroundItem(renderer, groundSword, 1000, mockAtlas)

      // Verified: Exactly 1 sprite drawn via renderer.draw using flpssd rect
      expect(drawnSprites.length).toBe(1)
      const sprite = drawnSprites[0]!
      expect(sprite.options.atlas).toBe(mockAtlas)
      expect(sprite.options.width).toBe(27)
      expect(sprite.options.height).toBe(9)
      expect(sprite.x).toBe(Math.round(300 - 27 / 2))
      expect(sprite.y).toBe(250 - 9)

      // Ground contact shadow is drawn at item.y - 2
      expect(drawnQuads.length).toBe(1)
      const shadow = drawnQuads[0]!
      expect(shadow.y).toBe(250 - 2)
      expect(shadow.color[3]).toBeLessThanOrEqual(0.4) // Subtle shadow alpha

      // Zero blue bounding boxes
      const blueBox = drawnQuads.find(q => q.color[2] > 0.8 && q.w > 10 && q.h > 10)
      expect(blueBox).toBeUndefined()

      // Zero white sparkle star quads
      const whiteGlint = drawnQuads.find(q => q.color[0] === 1.0 && q.color[1] === 1.0 && q.color[2] === 1.0)
      expect(whiteGlint).toBeUndefined()
    })

    it('renders authentic flpgld sprite for dropped gold when atlas is present', () => {
      const drawnQuads: any[] = []
      const drawnSprites: any[] = []
      const renderer = {
        drawSolid(x: number, y: number, w: number, h: number, color: any) {
          drawnQuads.push({ x, y, w, h, color })
        },
        draw(frame: any, x: number, y: number, options: any) {
          drawnSprites.push({ frame, x, y, options })
        },
      } as unknown as SpriteRenderer

      const mockAtlas = { texture: {} as any, width: 1024, height: 2145 } as any
      const groundGold: GroundItemEntity = {
        id: 'gold_huge_test',
        item: { isGold: true },
        name: '5000 Gold',
        nameZh: '5000 金币',
        quality: 'normal',
        isGold: true,
        amount: 5000,
        invWidth: 1,
        invHeight: 1,
        dropTime: 0,
        x: 400,
        y: 350,
        cellX: 0,
        cellY: 0,
        sparklePhase: 0,
      }

      drawGroundItem(renderer, groundGold, 1000, mockAtlas)

      expect(drawnSprites.length).toBe(1)
      const goldSprite = drawnSprites[0]!
      // Group 3 huge pile: 46x23
      expect(goldSprite.options.width).toBe(46)
      expect(goldSprite.options.height).toBe(23)
      expect(goldSprite.x).toBe(Math.round(400 - 46 / 2))
      expect(goldSprite.y).toBe(350 - 23)
    })
  })

  describe('3. Clean Pickup Lifecycle (Zero Remaining Dots / Artifacts)', () => {
    it('completely cleans groundItems on engine pickup tick without leaving orphaned entities', () => {
      const engine = new GameEngine(
        { widthPx: 1000, heightPx: 1000, overlap: () => 0 },
        {
          spawn: { x: 100, y: 100 },
          stats: [],
          xpTable: [],
          skills: [],
          npcDefs: [],
          questDefs: [],
          combatOptions: {
            playerSpeed: 4,
            playerReach: 50,
            playerCooldownTicks: 10,
            playerDamage: 5,
            playerManaPerAttack: 1,
            respawnTicks: 100,
          },
          talkRadius: 50,
          pickupRadius: 30,
          inventoryCols: 10,
          inventoryRows: 4,
        },
      )
      engine.world.player.x = 100
      engine.world.player.y = 100

      const droppedItem = {
        id: 'test_drop_item',
        code: 'hax',
        name: 'Hand Axe',
        invWidth: 1,
        invHeight: 3,
      }

      // Drop item near player
      engine.dropItem(droppedItem, 105, 105, 5, 5)
      expect(engine.groundItems.count).toBe(1)
      expect(engine.ground.length).toBe(1)

      // Tick with pickup intent
      engine.tick({
        pickingUp: true,
        movement: { x: 0, y: 0 },
        attacking: false,
        talking: false,
        digits: [],
        saving: false,
        loading: false,
      })

      // Verified: Cleanly removed from both collections
      expect(engine.groundItems.count).toBe(0)
      expect(engine.ground.length).toBe(0)
      expect(engine.bag.contents.some(p => (p.item as any).id === 'test_drop_item')).toBe(true)
    })
  })
})