import Activity from 'android.app.Activity'
import Intent from 'android.content.Intent'

import { OpenCodeScan, CodeScanErrorCode, CodeScanOptions, CodeScanSuccess } from '../interface.uts'
import { CodeScanFailImpl } from '../unierror.uts'

const LAUNCH_REQ: Int = 53011
const EXTRA_PAYLOAD = 'mas_content'
const EXTRA_FORMAT = 'mas_format'
const EXTRA_TITLE = 'mas_title'
const EXTRA_HINT = 'mas_hint'
const EXTRA_SUCCESS_HINT = 'mas_success_hint'
const EXTRA_EMPTY_HINT = 'mas_empty_hint'
const EXTRA_SMART_ZOOM = 'mas_smart_zoom'
const EXTRA_TORCH_MODE = 'mas_torch_mode'
const EXTRA_RESULT_MODE = 'mas_result_mode'
const EXTRA_SHOW_PAUSE_BUTTON = 'mas_show_pause_button'
const EXTRA_VIBRATE = 'mas_vibrate'
const EXTRA_CONTINUOUS = 'mas_continuous'
const EXTRA_FROM_ALBUM = 'mas_from_album'
const EXTRA_FORMATS = 'mas_formats'
const EXTRA_SCAN_REGION_ENABLED = 'mas_scan_region_enabled'
const EXTRA_SCAN_REGION = 'mas_scan_region'
const EXTRA_SCAN_STYLE_SHOW_MASK = 'mas_scan_style_show_mask'
const EXTRA_SCAN_STYLE_SHOW_BEAM = 'mas_scan_style_show_beam'
const EXTRA_SCAN_STYLE_BORDER_COLOR = 'mas_scan_style_border_color'
const EXTRA_SCAN_STYLE_MASK_COLOR = 'mas_scan_style_mask_color'
const EXTRA_SCAN_STYLE_BEAM_COLOR = 'mas_scan_style_beam_color'
const EXTRA_SCAN_STYLE_BEAM_DURATION = 'mas_scan_style_beam_duration'
const EXTRA_SCAN_STYLE_CORNER = 'mas_scan_style_corner'
const EXTRA_SCAN_STYLE_CORNER_RADIUS = 'mas_scan_style_corner_radius'
const EXTRA_SCAN_TIMEOUT = 'mas_scan_timeout'
const EXTRA_CONTINUOUS_SUCCESS_DURATION = 'mas_continuous_success_duration'
const EXTRA_ERR = 'mas_err'
const EXTRA_FROM_ALBUM_RESULT = 'mas_result_from_album'
const EXTRA_HAD_HITS = 'mas_had_hits'
const CAPTURE_ACTIVITY = 'uts.sdk.modules.masCodeScan.CodeCaptureActivity'

let activityResultHook: ((requestCode: Int, resultCode: Int, data?: Intent) => void) | null = null
let activeOptions: CodeScanOptions | null = null
let continuousHitCount: Int = 0
let pollTimerId: number = -1
let sessionContinuous: boolean = false
let continuousSuccess: ((res: CodeScanSuccess) => void) | null = null

@UTSJS.keepAlive
export function openCodeScan(options?: CodeScanOptions | null): void {
  const opts = options != null ? options : null
  const host = UTSAndroid.getUniActivity()
  if (host == null) {
    emitFailure(opts, 9021001)
    return
  }
  launchCapture(host, opts)
}

function clearPollTimer() {
  if (pollTimerId >= 0) {
    clearInterval(pollTimerId)
    pollTimerId = -1
  }
}

function drainHits() {
  const current = activeOptions
  const success = continuousSuccess
  if (current == null || success == null) return
  while (true) {
    const hit = CodeScanHitBus.pollHit()
    if (hit == null) break
    const content = hit[0]
    const format = hit[1]
    const fromAlbumFlag = hit[2]
    if (content == null || format == null || fromAlbumFlag == null) continue
    continuousHitCount++
    const ok: CodeScanSuccess = {
      content: content,
      format: format,
      fromAlbum: fromAlbumFlag == '1'
    }
    success(ok)
  }
}

function launchCapture(host: Activity, opts: CodeScanOptions | null): void {
  if (activityResultHook != null) {
    UTSAndroid.offAppActivityResult(activityResultHook)
    activityResultHook = null
  }
  clearPollTimer()
  CodeScanHitBus.detach()
  activeOptions = opts
  continuousHitCount = 0
  sessionContinuous = opts != null && opts.continuous == true
  continuousSuccess = sessionContinuous && opts != null ? opts.success : null
  if (sessionContinuous) {
    pollTimerId = setInterval(() => {
      drainHits()
    }, 120)
  }

  const onResult = (requestCode: Int, resultCode: Int, data?: Intent) => {
    if (requestCode != LAUNCH_REQ) {
      return
    }

    UTSAndroid.offAppActivityResult()
    activityResultHook = null
    drainHits()
    clearPollTimer()
    CodeScanHitBus.detach()

    const current = activeOptions
    const wasContinuous = sessionContinuous
    sessionContinuous = false

    if (resultCode != Activity.RESULT_OK) {
      let errCode: CodeScanErrorCode = 9021003
      if (data != null) {
        const nativeErr = data.getIntExtra(EXTRA_ERR, 0)
        if (nativeErr >= 9021002 && nativeErr <= 9021011) {
          errCode = nativeErr as CodeScanErrorCode
        }
      }
      // 连续扫已有命中：关闭只 complete，不 fail
      if (wasContinuous && continuousHitCount > 0) {
        if (current != null) {
          current.complete?.({ closed: true, hitCount: continuousHitCount })
        }
        activeOptions = null
        continuousSuccess = null
        return
      }
      if (wasContinuous && data != null && data.getBooleanExtra(EXTRA_HAD_HITS, false)) {
        if (current != null) {
          current.complete?.({ closed: true, hitCount: continuousHitCount })
        }
        activeOptions = null
        continuousSuccess = null
        return
      }
      if (wasContinuous && current != null) {
        emitFailure(current, errCode)
        const complete = current.complete
        if (complete != null) {
          complete({ closed: true, hitCount: continuousHitCount, failed: true, errCode: errCode })
        }
        activeOptions = null
        continuousSuccess = null
        return
      }
      emitFailure(current, errCode)
      activeOptions = null
      continuousSuccess = null
      return
    }

    if (wasContinuous) {
      if (current != null) {
        current.complete?.({ closed: true, hitCount: continuousHitCount })
      }
      activeOptions = null
      continuousSuccess = null
      return
    }

    let payload = ''
    let formatName = ''
    let fromAlbum = false
    if (data != null) {
      const rawPayload = data.getStringExtra(EXTRA_PAYLOAD)
      const rawFormat = data.getStringExtra(EXTRA_FORMAT)
      payload = rawPayload != null ? rawPayload : ''
      formatName = rawFormat != null ? rawFormat : ''
      fromAlbum = data.getBooleanExtra(EXTRA_FROM_ALBUM_RESULT, false)
    }

    if (payload == '') {
      emitFailure(current, 9021004)
      activeOptions = null
      continuousSuccess = null
      return
    }

    const ok: CodeScanSuccess = {
      content: payload,
      format: formatName,
      fromAlbum: fromAlbum
    }
    if (current != null) {
      current.success?.(ok)
      current.complete?.(ok)
    }
    activeOptions = null
    continuousSuccess = null
  }

  activityResultHook = onResult
  UTSAndroid.onAppActivityResult(onResult)

  let pageTitle = '扫一扫'
  let scanHint = '请将条码放入扫描框内'
  let successHint = '扫码成功'
  let emptyHint = '未识别到有效条码'
  let useSmartZoom = true
  let useTorchMode = 'off'
  let useResultMode = 'immediate'
  let useShowPauseButton = false
  let useVibrate = true
  let useContinuous = false
  let useFromAlbum = false
  let useScanRegion = false
  let regionWidth = 0.74
  let regionHeight = 0.74
  let regionCenterX = 0.5
  let regionCenterY = 0.5
  let formatsCsv = ''
  let styleShowMask = true
  let styleShowBeam = true
  let styleBorderColor = '#19be6b'
  let styleMaskColor = 'rgba(0, 0, 0, 0.45)'
  let styleBeamColor = '#12e880'
  let styleBeamDuration = 1800
  let styleCorner = 'corner'
  let styleCornerRadius = 20
  let scanTimeout = 0
  let continuousSuccessDuration = 1000
  if (opts != null) {
    if (opts.title != null && opts.title!.trim().length > 0) {
      pageTitle = opts.title!.trim()
    }
    if (opts.hint != null && opts.hint!.trim().length > 0) {
      scanHint = opts.hint!.trim()
    }
    if (opts.successHint != null && opts.successHint!.trim().length > 0) {
      successHint = opts.successHint!.trim()
    }
    if (opts.emptyHint != null && opts.emptyHint!.trim().length > 0) {
      emptyHint = opts.emptyHint!.trim()
    }
    if (opts.smartZoom != null) {
      useSmartZoom = opts.smartZoom!
    }
    if (opts.torch == 'on' || opts.torch == 'auto' || opts.torch == 'off') {
      useTorchMode = opts.torch!
    }
    if (opts.resultMode == 'confirm' || opts.resultMode == 'pause' || opts.resultMode == 'immediate') {
      useResultMode = opts.resultMode!
    }
    if (opts.showPauseButton != null) {
      useShowPauseButton = opts.showPauseButton!
    }
    if (opts.vibrate != null) {
      useVibrate = opts.vibrate!
    }
    if (opts.continuous != null) {
      useContinuous = opts.continuous!
    }
    if (opts.fromAlbum != null) {
      useFromAlbum = opts.fromAlbum!
    }
    if (opts.scanRegion != null) {
      useScanRegion = opts.scanRegion!.fullScreen != true
      if (opts.scanRegion!.width != null) {
        regionWidth = opts.scanRegion!.width!
      }
      if (opts.scanRegion!.height != null) {
        regionHeight = opts.scanRegion!.height!
      }
      if (opts.scanRegion!.centerX != null) {
        regionCenterX = opts.scanRegion!.centerX!
      }
      if (opts.scanRegion!.centerY != null) {
        regionCenterY = opts.scanRegion!.centerY!
      }
    }
    if (opts.scanTimeout != null) {
      scanTimeout = Math.floor(opts.scanTimeout!)
    }
    if (opts.continuousSuccessDuration != null) {
      continuousSuccessDuration = Math.max(0, Math.min(600000, Math.floor(opts.continuousSuccessDuration!)))
    }
    if (opts.scanStyle != null) {
      if (opts.scanStyle!.showMask != null) {
        styleShowMask = opts.scanStyle!.showMask!
      }
      if (opts.scanStyle!.showBeam != null) {
        styleShowBeam = opts.scanStyle!.showBeam!
      }
      if (opts.scanStyle!.borderColor != null) {
        styleBorderColor = opts.scanStyle!.borderColor!
      }
      if (opts.scanStyle!.maskColor != null) {
        styleMaskColor = opts.scanStyle!.maskColor!
      }
      if (opts.scanStyle!.beamColor != null) {
        styleBeamColor = opts.scanStyle!.beamColor!
      }
      if (opts.scanStyle!.beamDuration != null) {
        styleBeamDuration = opts.scanStyle!.beamDuration!
      }
      if (opts.scanStyle!.cornerStyle == 'full' || opts.scanStyle!.cornerStyle == 'corner' || opts.scanStyle!.cornerStyle == 'rounded' || opts.scanStyle!.cornerStyle == 'rounded-corner') {
        styleCorner = opts.scanStyle!.cornerStyle!
      }
      if (opts.scanStyle!.cornerRadius != null) {
        styleCornerRadius = Math.max(0, Math.min(160, Math.floor(opts.scanStyle!.cornerRadius!)))
      }
    }
    if (opts.formats != null && opts.formats!.length > 0) {
      const parts: string[] = []
      for (let i = 0; i < opts.formats!.length; i++) {
        const item = opts.formats![i]
        if (item != null && item.length > 0) {
          parts.push(item)
        }
      }
      formatsCsv = parts.join(',')
    }
  }

  const intent = new Intent()
  intent.setClassName(host, CAPTURE_ACTIVITY)
  intent.putExtra(EXTRA_TITLE, pageTitle)
  intent.putExtra(EXTRA_HINT, scanHint)
  intent.putExtra(EXTRA_SUCCESS_HINT, successHint)
  intent.putExtra(EXTRA_EMPTY_HINT, emptyHint)
  intent.putExtra(EXTRA_SMART_ZOOM, useSmartZoom)
  intent.putExtra(EXTRA_TORCH_MODE, useTorchMode)
  intent.putExtra(EXTRA_RESULT_MODE, useResultMode)
  intent.putExtra(EXTRA_SHOW_PAUSE_BUTTON, useShowPauseButton)
  intent.putExtra(EXTRA_VIBRATE, useVibrate)
  intent.putExtra(EXTRA_CONTINUOUS, useContinuous)
  intent.putExtra(EXTRA_FROM_ALBUM, useFromAlbum)
  intent.putExtra(EXTRA_FORMATS, formatsCsv)
  intent.putExtra(EXTRA_SCAN_REGION_ENABLED, useScanRegion)
  intent.putExtra(EXTRA_SCAN_REGION, `${regionWidth},${regionHeight},${regionCenterX},${regionCenterY}`)
  intent.putExtra(EXTRA_SCAN_STYLE_SHOW_MASK, styleShowMask)
  intent.putExtra(EXTRA_SCAN_STYLE_SHOW_BEAM, styleShowBeam)
  intent.putExtra(EXTRA_SCAN_STYLE_BORDER_COLOR, styleBorderColor)
  intent.putExtra(EXTRA_SCAN_STYLE_MASK_COLOR, styleMaskColor)
  intent.putExtra(EXTRA_SCAN_STYLE_BEAM_COLOR, styleBeamColor)
  intent.putExtra(EXTRA_SCAN_STYLE_BEAM_DURATION, styleBeamDuration)
  intent.putExtra(EXTRA_SCAN_STYLE_CORNER, styleCorner)
  intent.putExtra(EXTRA_SCAN_STYLE_CORNER_RADIUS, styleCornerRadius)
  intent.putExtra(EXTRA_SCAN_TIMEOUT, scanTimeout)
  intent.putExtra(EXTRA_CONTINUOUS_SUCCESS_DURATION, continuousSuccessDuration)
  host.startActivityForResult(intent, LAUNCH_REQ)
}

function emitFailure(opts: CodeScanOptions | null, code: CodeScanErrorCode): void {
  const err = new CodeScanFailImpl(code)
  if (opts != null) {
    opts.fail?.(err)
    opts.complete?.(err)
  }
}