/**
 * 语句：adb / keyevent / scroll / swipe / locate / click / press / input / ocr 统一入口
 * type===adb 时按 method 分发到 adb/*.js；其余 type 在本文件内执行，公共逻辑见 utils.js
 */

const { calculateSwipeCoordinates } = require('./utils.js')
const { assertStrictKeys } = require('../../../action-schema.js')

const types = ['adb', 'keyevent', 'scroll', 'swipe', 'locate', 'click', 'press', 'input', 'ocr']

const METHOD_HANDLERS = {
  input: require('./input.js'),
  click: require('./click.js'),
  locate: require('./locate.js'),
  swipe: require('./swipe.js'),
  scroll: require('./scroll.js'),
  keyevent: require('./keyevent.js'),
  press: require('./press.js'),
  'string-press': require('./string-press.js'),
  'send-img-to-device': require('./send-img-to-device.js'),
}

/* ========== 解析入口 ========== */
function parse (action, parseContext) {
  const path = parseContext.actionPath || 'adb'
  const type = action.type || 'adb'
  const { extractVarName, resolveValue } = parseContext
  const variableContext = parseContext.variableContext || {}

  if (type === 'adb') {
    assertStrictKeys(action, ['type', 'method', 'inVars', 'outVars', 'target', 'value', 'variable', 'clear'], path)
    if (action.method == null || String(action.method).trim() === '') {
      throw new Error(`${path}: adb 须包含 method`)
    }
    if (!Array.isArray(action.inVars)) {
      throw new Error(`${path}: adb 须包含 inVars 数组`)
    }
    if (!Array.isArray(action.outVars)) {
      throw new Error(`${path}: adb 须包含 outVars 数组`)
    }
    return {
      type: 'adb',
      method: action.method,
      inVars: action.inVars.map((v) => extractVarName(v)),
      outVars: action.outVars.map((v) => extractVarName(v)),
      target: action.target,
      value: action.value,
      variable: action.variable,
      clear: action.clear === true,
    }
  }
  if (type === 'locate' || type === 'click') {
    assertStrictKeys(action, ['type', 'method', 'target', 'variable'], path)
    return {
      type,
      method: action.method,
      target: action.target,
      variable: action.variable,
    }
  }
  if (type === 'input') {
    assertStrictKeys(action, ['type', 'value', 'target', 'clear'], path)
    if (action.value === undefined || action.value === null || action.value === '') {
      throw new Error(`${path}: input 须包含 value`)
    }
    return {
      type: 'input',
      value: action.value,
      target: action.target,
      clear: action.clear === true,
    }
  }
  if (type === 'press') {
    assertStrictKeys(action, ['type', 'value'], path)
    if (action.value === undefined || action.value === null || action.value === '') {
      throw new Error(`${path}: press 须包含 value`)
    }
    return { type: 'press', value: action.value }
  }
  if (type === 'ocr') {
    assertStrictKeys(action, ['type', 'method', 'area', 'avatar', 'variable'], path)
    return {
      type: 'ocr',
      method: action.method,
      area: action.area,
      avatar: action.avatar != null ? resolveValue(action.avatar, variableContext) : undefined,
      variable: action.variable,
    }
  }
  if (type === 'keyevent') {
    assertStrictKeys(action, ['type', 'inVars'], path)
    if (!Array.isArray(action.inVars) || action.inVars.length < 1) {
      throw new Error(`${path}: keyevent 须使用 inVars 且至少 1 项为键码`)
    }
    return {
      type: 'keyevent',
      inVars: action.inVars.map((v) => extractVarName(v)),
    }
  }
  if (type === 'scroll') {
    assertStrictKeys(action, ['type', 'value'], path)
    if (action.value === undefined || action.value === null || action.value === '') {
      throw new Error(`${path}: scroll 须包含 value（方向）`)
    }
    return { type: 'scroll', value: action.value }
  }
  if (type === 'swipe') {
    assertStrictKeys(action, ['type', 'value'], path)
    if (action.value === undefined || action.value === null || action.value === '') {
      throw new Error(`${path}: swipe 须包含 value`)
    }
    return { type: 'swipe', value: action.value }
  }
  throw new Error(`${path}: 未知的 adb-parser type: ${type}`)
}

/* ========== 执行入口 ========== */
async function execute(action, ctx) {
  const {
    device,
    folderPath,
    resolution,
    variableContext,
    api,
    extractVarName,
    resolveValue,
    logOutVars,
    DEFAULT_SCROLL_DISTANCE = 100,
  } = ctx

  /* --- type: locate --- */
  if (action.type === 'locate') {
    const method = action.method || 'image'
    let position = null
    if (method === 'image') {
      const imagePath = action.target.startsWith('/') || action.target.includes(':') ? action.target : `${folderPath}/${action.target}`
      if (!api?.matchImageAndGetCoordinate) return { success: false, error: '图像匹配 API 不可用' }
      const matchResult = await api.matchImageAndGetCoordinate(device, imagePath, folderPath)
      if (!matchResult.success) return { success: false, error: `图像匹配失败: ${matchResult.error != null ? matchResult.error : 'unknown'}` }
      position = matchResult.clickPosition
    } else if (method === 'text') {
      if (!api?.findTextAndGetCoordinate) return { success: false, error: '文字识别 API 不可用' }
      const matchResult = await api.findTextAndGetCoordinate(device, action.target)
      if (!matchResult.success) return { success: false, error: `文字识别失败: ${matchResult.error != null ? matchResult.error : 'unknown'}` }
      position = matchResult.clickPosition
    } else if (method === 'coordinate') {
      position = Array.isArray(action.target) ? { x: action.target[0], y: action.target[1] } : action.target
    }
    if (action.variable && position) variableContext[action.variable] = position
    return { success: true, result: position }
  }

  /* --- type: click --- */
  if (action.type === 'click') {
    const method = action.method || 'position'
    let position = null
    if (method === 'position') position = resolveValue(action.target, variableContext)
    else if (method === 'image') {
      const imagePath = action.target.startsWith('/') || action.target.includes(':') ? action.target : `${folderPath}/${action.target}`
      if (!api?.matchImageAndGetCoordinate) return { success: false, error: '图像匹配 API 不可用' }
      const matchResult = await api.matchImageAndGetCoordinate(device, imagePath, folderPath)
      if (!matchResult.success) return { success: false, error: `图像匹配失败: ${matchResult.error != null ? matchResult.error : 'unknown'}` }
      position = matchResult.clickPosition
    } else if (method === 'text') {
      if (!api?.findTextAndGetCoordinate) return { success: false, error: '文字识别 API 不可用' }
      const matchResult = await api.findTextAndGetCoordinate(device, action.target)
      if (!matchResult.success) return { success: false, error: `文字识别失败: ${matchResult.error != null ? matchResult.error : 'unknown'}` }
      position = matchResult.clickPosition
    }
    if (!position?.x || !position?.y) return { success: false, error: '无法获取点击位置' }
    if (!api?.sendTap) return { success: false, error: '点击 API 不可用' }
    const tapResult = await api.sendTap(device, position.x, position.y)
    if (!tapResult.success) return { success: false, error: `点击失败: ${tapResult.error != null ? tapResult.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: press --- */
  if (action.type === 'press') {
    const imagePath = `${folderPath}/resources/${action.value}`
    if (!api?.matchImageAndGetCoordinate) return { success: false, error: '图像匹配 API 不可用' }
    const matchResult = await api.matchImageAndGetCoordinate(device, imagePath, folderPath)
    if (!matchResult.success) return { success: false, error: `图像匹配失败: ${matchResult.error != null ? matchResult.error : 'unknown'}` }
    const { x, y } = matchResult.clickPosition
    if (!api?.sendTap) return { success: false, error: '点击 API 不可用' }
    const tapResult = await api.sendTap(device, x, y)
    if (!tapResult.success) return { success: false, error: `点击失败: ${tapResult.error != null ? tapResult.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: input --- */
  if (action.type === 'input') {
    let inputValue = resolveValue(action.value, variableContext)
    if (!inputValue && action.target) {
      const resolvedTarget = resolveValue(action.target, variableContext)
      if (resolvedTarget !== action.target || !action.target.includes(' ')) inputValue = resolvedTarget
    }
    if (!inputValue) return { success: false, error: '输入内容为空' }
    if (!api?.sendText) return { success: false, error: '输入 API 不可用' }
    if (action.clear) {
      for (let i = 0; i < 200; i++) {
        const clearResult = await api.sendKeyEvent(device, '67')
        if (!clearResult.success) break
        await new Promise((r) => setTimeout(r, 10))
      }
      await new Promise((r) => setTimeout(r, 200))
    }
    const textResult = await api.sendText(device, inputValue)
    if (!textResult.success) return { success: false, error: `输入失败: ${textResult.error != null ? textResult.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: ocr --- */
  if (action.type === 'ocr') {
    if (!api?.ocrLastMessage) return { success: false, error: 'OCR API 不可用' }
    const method = action.method || 'full-screen'
    let avatarPath = null
    if (method === 'by-avatar' && action.avatar) {
      const avatarName = resolveValue(action.avatar, variableContext)
      if (avatarName) {
        const folderName = folderPath.split(/[/\\]/).pop()
        avatarPath = `${folderName}/${avatarName}`
      }
    }
    const ocrResult = await api.ocrLastMessage(device, method, avatarPath, action.area, folderPath)
    if (!ocrResult.success) return { success: false, error: `OCR识别失败: ${ocrResult.error != null ? ocrResult.error : 'unknown'}` }
    if (action.variable) variableContext[action.variable] = ocrResult.text || ''
    return { success: true, text: ocrResult.text, position: ocrResult.position }
  }

  /* --- type: keyevent --- */
  if (action.type === 'keyevent') {
    const inVars = action.inVars || []
    const keyVar = extractVarName(inVars[0])
    const keyCode = variableContext[keyVar] != null && variableContext[keyVar] !== ''
      ? variableContext[keyVar]
      : keyVar
    if (!keyCode && keyCode !== 0) return { success: false, error: 'keyevent 操作缺少按键代码参数' }
    if (keyCode === 'KEYCODE_BACK') keyCode = '4'
    const keyResult = api.sendSystemKey(device, String(keyCode))
    if (!keyResult.success) return { success: false, error: `按键失败: ${keyResult.error != null ? keyResult.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: scroll --- */
  if (action.type === 'scroll') {
    if (!api.sendScroll) return { success: false, error: '滚动 API 不可用' }
    const direction = action.value
    const r = await api.sendScroll(device, direction, resolution.width, resolution.height, DEFAULT_SCROLL_DISTANCE, 500)
    if (!r.success) return { success: false, error: `滚动失败: ${r.error != null ? r.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: swipe --- */
  if (action.type === 'swipe') {
    if (!api.sendSwipe) return { success: false, error: '滑动 API 不可用' }
    const { x1, y1, x2, y2 } = calculateSwipeCoordinates(action.value, resolution.width, resolution.height)
    const r = await api.sendSwipe(device, x1, y1, x2, y2, 300)
    if (!r.success) return { success: false, error: `滑动失败: ${r.error != null ? r.error : 'unknown'}` }
    return { success: true }
  }

  /* --- type: adb 按 method 分发到 adb/*.js --- */
  const method = action.method
  if (!method) return { success: false, error: 'adb 操作缺少 method 参数' }
  const handler = METHOD_HANDLERS[method]
  if (!handler || !handler.run) return { success: false, error: `未知的 adb method: ${method}` }
  return handler.run(action, ctx)
}

module.exports = { types, parse, execute }