import { Component, POSITION } from '@hatiolab/things-scene'
import { themesColorRange } from '@fmsim/api'
import { LEGEND_CAPACITY, Legend, resolveCarrierLegend } from './mcs-status-default'
import { safeRound } from '../utils/safe-round'
import { getValueOnRanges } from '../utils/get-value-on-ranges'
import { carrierSegments, abnormalSegments, carrierColorsFromLegend, pickSegmentAt, GaugeSegment } from '../utils/stocker-gauge'

type Constructor<T = {}> = new (...args: any[]) => T

/**
 * 용량 게이지 (통합 로직).
 *
 * 하나의 컴포넌트가 mode 에 따라 3가지 게이지를 표현한다:
 *  - 'capacity'  : 용량 사용률(usage%) 채움 게이지 + high/low watermark (기본)
 *  - 'carrier'   : 캐리어 상태비율 세그먼트 (Full / Empty / EmptyEmpty)
 *  - 'abnormal'  : 캐리어 정상/비정상 비율 세그먼트 (Normal / Abnormal)
 *
 * StockerCapacityBar(스토커 지붕 게이지)와 ZoneCapacityBar(존 게이지)가 이 로직을 공유한다.
 * 두 컴포넌트는 base(스토커=Shape, 존=Container)·정체성(identifiable)·legend 폴백만 다르고,
 * 게이지를 그리는 규칙은 완전히 동일하다 — 규칙을 이 믹스인 한 곳에 두어 drift 를 막는다.
 *
 * mode 소스: root.stockerGaugeMode (기본 'capacity'). RootContainer 의 런타임 전용
 * transient 속성으로, 3D(machine-3d buildGauge)와도 동일 소스라 2D/3D 게이지가 항상 일치한다.
 * (root-container-override.ts 정의. 모드가 바뀌면 _refreshStockerGauges 가 두 게이지를 갱신.)
 *
 * 데이터 필드(2D 기준, canonical):
 *  - capacity : CURRENTCAPACITY / MAXCAPACITY / HIGHWATERMARK / LOWWATERMARK / FULLUP
 *  - carrier  : CARRIER_FULL / CARRIER_EMPTY / CARRIER_EMPTY_EMPTY
 *  - abnormal : CARRIER_NORMAL / CARRIER_ABNORMAL
 */

/** 게이지 NATURE 속성 조각 (스토커/존 공통). 각 컴포넌트 NATURE 에 spread 로 합친다. */
export const CapacityGaugeMixinProperties = [
  {
    type: 'select',
    label: 'legend-name',
    name: 'legendName',
    property: {
      options: themesColorRange
    }
  },
  {
    type: 'number',
    name: 'currentUsage',
    label: 'current-usage'
  },
  {
    type: 'number',
    name: 'highWatermark',
    label: 'high-watermark'
  },
  {
    type: 'number',
    name: 'lowWatermark',
    label: 'low-watermark'
  },
  {
    type: 'number',
    name: 'maxCapacity',
    label: 'max-capacity'
  },
  {
    type: 'boolean',
    name: 'fullup',
    label: 'fullup'
  },
  {
    type: 'number',
    name: 'carrierFull',
    label: 'carrier-full'
  },
  {
    type: 'number',
    name: 'carrierEmpty',
    label: 'carrier-empty'
  },
  {
    type: 'number',
    name: 'carrierEmptyEmpty',
    label: 'carrier-empty-empty'
  },
  {
    type: 'number',
    name: 'carrierNormal',
    label: 'carrier-normal'
  },
  {
    type: 'number',
    name: 'carrierAbnormal',
    label: 'carrier-abnormal'
  },
  {
    type: 'number',
    label: 'round',
    name: 'round',
    property: {
      min: 0
    }
  },
  {
    type: 'hidden',
    name: 'usage',
    label: 'usage'
  }
]

const controlHandler = {
  ondragmove: function (point: POSITION, index: number, component: Component) {
    var { left, top, width, height } = (component as any).model

    var transcoorded = (component as any).transcoordP2S(point.x, point.y)
    var round = ((transcoorded.x - left) / (width / 2)) * 100

    round = safeRound(round, width, height)

    ;(component as any).set({
      round
    })
  }
}

export function CapacityGaugeMixin<TBase extends Constructor<Component>>(Base: TBase): any {
  return class extends Base {
    /** 게이지 모드: RootContainer 런타임 transient 속성. 3D(machine-3d) 와 동일 소스. */
    get gaugeMode(): string {
      return (this as any).root?.stockerGaugeMode || 'capacity'
    }

    get controls() {
      var { left, top, width, round, height } = (this as any).state
      round = round == undefined ? 0 : safeRound(round, width, height)

      return [
        {
          x: left + (width / 2) * (round / 100),
          y: top,
          handler: controlHandler
        }
      ]
    }

    getTheme() {
      const { legendName } = (this as any).state

      if (legendName) {
        return (this as any).root?.style?.[legendName]
      }
    }

    get legend(): Legend {
      return this.getTheme() || this.getLegendFallback()
    }

    /** legend 미지정 시 폴백 테마. 컴포넌트별로 override (스토커/존 각자 전역 테마). */
    getLegendFallback(): Legend {
      return LEGEND_CAPACITY
    }

    get statusColor(): string | undefined {
      const { fullup } = (this as any).state
      return fullup ? 'red' : getValueOnRanges(this.usage, this.legend)
    }

    get text() {
      // usage% 값은 capacity 모드에서만 표시. carrier/abnormal 은 세그먼트별 자체 라벨을 그리므로
      // base 의 value 텍스트를 억제한다.
      if (this.gaugeMode !== 'capacity') {
        return ''
      }
      return this.usage + '%'
    }

    render(context: CanvasRenderingContext2D) {
      const mode = this.gaugeMode

      if (mode === 'carrier' || mode === 'abnormal') {
        this.renderSegmentGauge(context, this.segments(mode))
        return
      }

      // capacity (기본)
      const { width, height } = (this as any).bounds
      if (width >= height) {
        this.renderLandscape(context)
      } else {
        this.renderPortrait(context)
      }
    }

    /**
     * carrier/abnormal mode 의 세그먼트 목록 (공유 유틸 = 3D 와 동일 계산).
     * 배열 순서 = portrait 아래→위 / landscape 왼→오.
     */
    segments(mode: string): GaugeSegment[] {
      if (mode === 'abnormal') {
        const { carrierNormal = 0, carrierAbnormal = 0 } = (this as any).state
        return abnormalSegments(carrierNormal, carrierAbnormal)
      }
      const { carrierFull = 0, carrierEmpty = 0, carrierEmptyEmpty = 0 } = (this as any).state
      // 색상은 carrier 컴포넌트와 동일한 legend(테마)에서 취득 (carrierColorsFromLegend).
      const colors = carrierColorsFromLegend(resolveCarrierLegend(this))
      return carrierSegments(carrierFull, carrierEmpty, carrierEmptyEmpty, colors)
    }

    /**
     * 클릭(또는 hover) 지점이 어떤 세그먼트에 속하는지 판정. carrier/abnormal 모드 전용 —
     * capacity 모드·데이터 없음·좌표 변환 실패 시 null.
     *
     * renderSegmentGauge 와 동일한 배치 규칙으로 매핑한다: landscape(가로) 는 왼→오(누적 x),
     * portrait(세로) 는 아래→위(바닥부터 누적). ratio 0 세그먼트는 화면에 없으므로 건너뛴다.
     */
    segmentAtEvent(event: MouseEvent): { mode: string; key: string; count: number } | null {
      const mode = this.gaugeMode
      if (mode !== 'carrier' && mode !== 'abnormal') return null

      // 3D 게이지는 부모 STOCKER 의 real-object 가 그린다(이 컴포넌트가 아님) → 2D 세그먼트 판정 대상 아님.
      if ((this as any).root?.is3dMode) return null

      const ox = (event as any)?.offsetX
      const oy = (event as any)?.offsetY
      if (typeof ox !== 'number' || typeof oy !== 'number') return null

      // 표면 픽셀(offsetX/offsetY) → 이 컴포넌트 로컬 프레임.
      // 주의: transcoordP2S 는 '부모→로컬' 한 단계라 캔버스 픽셀로 단독 호출하면 안 된다.
      // 엔진 capture() 와 동일하게 루트부터 전체 체인을 적용하는 helper 가 toLocal.
      let local: { x: number; y: number } | undefined
      try {
        local = (this as any).toLocal(ox, oy)
      } catch {
        return null
      }
      if (!local) return null

      const { left, top, width, height } = (this as any).bounds
      if (!(width > 0) || !(height > 0)) return null

      // 컴포넌트 로컬프레임 좌표 → bounds 기준 within-box. 경계 반올림 방어로 clamp.
      const lx = Math.min(Math.max(local.x - left, 0), width)
      const ly = Math.min(Math.max(local.y - top, 0), height)

      const landscape = width >= height
      const pos = landscape ? lx : height - ly // portrait 는 바닥 기준 거리
      const span = landscape ? width : height

      const picked = pickSegmentAt(this.segments(mode), pos, span)
      if (!picked) return null

      // label 은 key 로 도출 가능하고 로케일 의존이라 payload 에서 제외 — key(대문자 토큰)로 식별.
      return { mode, key: picked.key, count: picked.count }
    }

    /** 세그먼트 게이지 렌더 (carrier/abnormal 공통). bounds 방향으로 landscape/portrait 자동. */
    renderSegmentGauge(context: CanvasRenderingContext2D, segments: GaugeSegment[]) {
      const { left, top, width, height } = (this as any).bounds
      const { lineWidth, strokeStyle, round, fillStyle = 'white' } = (this as any).state
      const landscape = width >= height

      context.save()
      context.translate(left, top)

      // background
      context.beginPath()
      context.fillStyle = fillStyle
      context.roundRect(0, 0, width, height, round)
      context.fill()
      context.clip()

      if (landscape) {
        // 왼→오
        let x = 0
        for (const seg of segments) {
          const segWidth = width * seg.ratio
          if (segWidth <= 0) continue

          context.beginPath()
          context.fillStyle = seg.color
          context.rect(x, 0, segWidth, height)
          context.fill()

          this._drawSegmentLabel(context, seg, x, 0, segWidth, height)
          x += segWidth
        }
      } else {
        // 아래→위 (배열 첫 세그먼트가 바닥)
        let y = height
        for (const seg of segments) {
          const segHeight = height * seg.ratio
          if (segHeight <= 0) continue

          y -= segHeight

          context.beginPath()
          context.fillStyle = seg.color
          context.rect(0, y, width, segHeight)
          context.fill()

          this._drawSegmentLabel(context, seg, 0, y, width, segHeight)
        }
      }

      // outline
      context.beginPath()
      context.setLineDash([])
      context.strokeStyle = strokeStyle
      context.lineWidth = lineWidth
      context.roundRect(0, 0, width, height, round)
      context.stroke()

      context.translate(-left, -top)
      context.restore()
    }

    private _drawSegmentLabel(
      context: CanvasRenderingContext2D,
      seg: GaugeSegment,
      x: number,
      y: number,
      w: number,
      h: number
    ) {
      // 이름 라벨(Full/Empty/Abnormal…)은 그리지 않는다. 각 세그먼트 영역 중심에 숫자(%)만 표시.
      // 컴포넌트의 폰트 설정(fontFamily/fontSize/bold/italic)을 그대로 적용 — this.font.
      const fontSize = (this as any).state.fontSize || 15
      context.font = (this as any).font

      // 공간에 따라 단계적 축소: 넉넉하면 '값%', 좁으면 '%' 떼고 값만, 더 좁으면 생략.
      const value = `${Math.round(seg.ratio * 100)}`
      const fits = (t: string) => fontSize <= h && context.measureText(t).width <= w

      let text: string | null = null
      if (fits(`${value}%`)) {
        text = `${value}%`
      } else if (fits(value)) {
        text = value
      }
      if (text === null) {
        return
      }

      context.fillStyle = '#333'
      context.textAlign = 'center'
      context.textBaseline = 'middle'
      context.fillText(text, x + w / 2, y + h / 2)
    }

    renderLandscape(context: CanvasRenderingContext2D) {
      const { left, top, width, height } = (this as any).bounds
      const { highWatermark, lowWatermark, lineWidth, strokeStyle, round, fillStyle = 'white' } = (this as any).state

      context.save()
      context.translate(left, top)

      // gauge background
      context.beginPath()

      context.fillStyle = fillStyle
      context.roundRect(0, 0, width, height, round)

      context.fill()

      context.clip()

      // gauge foreground
      context.beginPath()

      context.fillStyle = this.statusColor!

      context.rect(0, 0, (width / 100) * this.usage, height)
      context.fill()

      // high-watermark level

      if (highWatermark && highWatermark > 0 && highWatermark < 100) {
        context.beginPath()

        context.strokeStyle = 'black'
        context.lineWidth = 1
        context.setLineDash([3])

        const x = (width / 100) * highWatermark
        context.moveTo(x, 0)
        context.lineTo(x, height)

        context.stroke()
      }

      // low-watermark level

      if (lowWatermark && lowWatermark > 0 && lowWatermark < 100) {
        context.beginPath()

        context.strokeStyle = 'black'
        context.lineWidth = 1
        context.setLineDash([3])

        const x = (width / 100) * lowWatermark
        context.moveTo(x, 0)
        context.lineTo(x, height)

        context.stroke()
      }

      // gauge outline
      context.beginPath()

      context.setLineDash([])
      context.strokeStyle = strokeStyle
      context.lineWidth = lineWidth
      context.roundRect(0, 0, width, height, round)
      context.stroke()

      context.beginPath()

      context.translate(-left, -top)
      context.restore()
    }

    renderPortrait(context: CanvasRenderingContext2D) {
      const { left, top, width, height } = (this as any).bounds
      const { highWatermark, lowWatermark, lineWidth, strokeStyle, round, fillStyle = 'white' } = (this as any).state

      context.save()
      context.translate(left, top)

      // gauge background
      context.beginPath()

      context.fillStyle = fillStyle
      context.roundRect(0, 0, width, height, round)

      context.fill()

      context.clip()

      // gauge foreground
      context.beginPath()

      context.fillStyle = this.statusColor!

      context.rect(0, height - (height / 100) * this.usage, width, (height / 100) * this.usage)
      context.fill()

      // high-watermark level

      if (highWatermark && highWatermark > 0 && highWatermark < 100) {
        context.beginPath()

        context.strokeStyle = 'black'
        context.lineWidth = 1
        context.setLineDash([3])

        const y = height - (height / 100) * highWatermark
        context.moveTo(0, y)
        context.lineTo(width, y)

        context.stroke()
      }

      // low-watermark level

      if (lowWatermark && lowWatermark > 0 && lowWatermark < 100) {
        context.beginPath()

        context.strokeStyle = 'black'
        context.lineWidth = 1
        context.setLineDash([3])

        const y = height - (height / 100) * lowWatermark
        context.moveTo(0, y)
        context.lineTo(width, y)

        context.stroke()
      }

      // gauge outline
      context.beginPath()

      context.setLineDash([])
      context.strokeStyle = strokeStyle
      context.lineWidth = lineWidth
      context.roundRect(0, 0, width, height, round)
      context.stroke()

      context.beginPath()

      context.translate(-left, -top)
      context.restore()
    }

    get usage() {
      const { currentUsage = 0, maxCapacity = 100 } = (this as any).state
      return Math.round((currentUsage / maxCapacity) * 100)
    }

    set usage(usage: number) {
      // intentionally have done nothing
    }

    onchangeData(after: Record<string, any>, before: Record<string, any>): void {
      const data = (this as any).data && typeof (this as any).data == 'object' ? (this as any).data : {}
      const {
        CURRENTCAPACITY = 0,
        MAXCAPACITY = 100,
        HIGHWATERMARK = 100,
        LOWWATERMARK = 0,
        FULLUP = 'F',
        CARRIER_FULL = 0,
        CARRIER_EMPTY = 0,
        CARRIER_EMPTY_EMPTY = 0,
        CARRIER_NORMAL = 0,
        CARRIER_ABNORMAL = 0
      } = data

      const currentUsage = Number(CURRENTCAPACITY) || 0
      const maxCapacity = Number(MAXCAPACITY) || 100
      const highWatermark = Number(HIGHWATERMARK) || 100
      const lowWatermark = Number(LOWWATERMARK) || 0

      ;(this as any).setState({
        currentUsage,
        maxCapacity,
        highWatermark,
        lowWatermark,
        fullup: FULLUP == 'T',
        usage: Math.round((currentUsage / maxCapacity) * 100),
        carrierFull: Number(CARRIER_FULL) || 0,
        carrierEmpty: Number(CARRIER_EMPTY) || 0,
        carrierEmptyEmpty: Number(CARRIER_EMPTY_EMPTY) || 0,
        carrierNormal: Number(CARRIER_NORMAL) || 0,
        carrierAbnormal: Number(CARRIER_ABNORMAL) || 0
      })
    }

    // ── hover 툴팁 (carrier/abnormal 모드 세그먼트별 수치) ───────────────────────────
    // 색상만으로 타입 구분이 어려울 때, 마우스 hover 로 정확한 수치 확인. 뷰어 모드 전용
    // (model-layer 가 편집 모드에선 hover dispatch 안 함).

    async ready(): Promise<void> {
      await super.ready()
      // hover 이벤트 수신 opt-in: model-layer _onmouseenter_all guard(hasLegacyHover) 통과.
      const ev = (this as any).model.event
      if (!ev || !ev.hover) {
        ;(this as any).model.event = { ...(ev || {}), hover: true }
      }
    }

    onMouseEnter(): void {
      // capacity 는 값이 한 개(usage%)라 툴팁 불필요. carrier/abnormal 만.
      if (this.gaugeMode === 'capacity') return
      this._showGaugeTooltip()
    }

    onMouseLeave(): void {
      this._hideGaugeTooltip()
    }

    dispose(): void {
      this._hideGaugeTooltip()
      super.dispose()
    }

    private _tooltipEl?: HTMLDivElement
    private _tooltipMove?: (e: MouseEvent) => void

    private _showGaugeTooltip(): void {
      if (typeof document === 'undefined') return
      const segments = this.segments(this.gaugeMode).filter(s => s.count > 0)
      if (!segments.length) return

      this._hideGaugeTooltip()

      const el = document.createElement('div')
      el.style.cssText = [
        'position:fixed',
        'left:-9999px',
        'top:0',
        'z-index:2147483647',
        'pointer-events:none',
        'background:rgba(30,30,30,0.92)',
        'color:#fff',
        'padding:6px 9px',
        'border-radius:6px',
        'font:12px/1.5 sans-serif',
        'box-shadow:0 2px 10px rgba(0,0,0,0.35)',
        'white-space:nowrap'
      ].join(';')

      for (const seg of segments) {
        const row = document.createElement('div')
        row.style.cssText = 'display:flex;align-items:center;gap:6px'

        const swatch = document.createElement('span')
        swatch.style.cssText = `display:inline-block;width:10px;height:10px;border-radius:2px;background:${seg.color}`

        const label = document.createElement('span')
        label.textContent = seg.label.replace(/\n/g, ' ')
        label.style.cssText = 'flex:1'

        const value = document.createElement('span')
        value.textContent = String(seg.count)
        value.style.cssText = 'font-weight:700;margin-left:12px'

        row.append(swatch, label, value)
        el.appendChild(row)
      }

      document.body.appendChild(el)
      this._tooltipEl = el

      this._tooltipMove = (e: MouseEvent) => {
        el.style.left = `${e.clientX + 14}px`
        el.style.top = `${e.clientY + 14}px`
      }
      document.addEventListener('mousemove', this._tooltipMove, true)
    }

    private _hideGaugeTooltip(): void {
      if (this._tooltipMove) {
        document.removeEventListener('mousemove', this._tooltipMove, true)
        this._tooltipMove = undefined
      }
      if (this._tooltipEl) {
        this._tooltipEl.remove()
        this._tooltipEl = undefined
      }
    }
  }
}