import { getDeviceKindForAction } from '@/utils/robotDevice'

export const FLOW_SCHEMA_VERSION = 2
export const DEFAULT_ROLE_KEY = 'default_executor'
export const FLOW_NODE_RESOURCE_OWNER = 'FLOW_NODE'
export const USER_RESOURCE_OWNER = 'USER'
// 图片分析节点的输出契约会被节点配置、参数面板和旧流程迁移复用，集中定义避免字段漂移。
export const IMAGE_ANALYSIS_OUTPUT_PARAMS = Object.freeze([
  { name: 'result', type: 'object', desc: '按提示词返回的结果', children: [], disabled: true },
  { name: 'resultText', type: 'string', desc: '模型返回的原始文本', disabled: true },
  { name: 'matched', type: 'boolean', desc: '找图是否匹配', disabled: true },
  { name: 'matchScore', type: 'number', desc: '匹配分数或定位置信度', disabled: true },
  { name: 'coordinates', type: 'array<number>', desc: '原图坐标 [x1,y1,x2,y2]', children: [], disabled: true },
  { name: 'center', type: 'array<number>', desc: '目标中心点 [x,y]', children: [], disabled: true },
  { name: 'matchedDescription', type: 'string', desc: '模型实际定位的目标描述', disabled: true },
  { name: 'refinementMethod', type: 'string', desc: '坐标精修方式', disabled: true },
  { name: 'matchCount', type: 'number', desc: '匹配项数量', disabled: true },
  { name: 'matches', type: 'array<object>', desc: '全部匹配项', children: [], disabled: true },
  { name: 'selectedMatchIndex', type: 'number', desc: '当前选择的匹配序号', disabled: true },
])

const DEVICE_KIND_META = Object.freeze({
  1: { key: 'agv', name: '移动底盘' },
  2: { key: 'arm', name: '机械臂' },
  4: { key: 'bio_head', name: '仿生头' },
  5: { key: 'camera', name: '摄像头' },
  9: { key: 'microphone', name: '麦克风' },
  12: { key: 'robot', name: '机器人本体' },
  13: { key: 'speaker', name: '扬声器' },
})

const clone = (value) => JSON.parse(JSON.stringify(value ?? null))
const normalizedText = (value) => String(value || '').trim()
const LEGACY_NODE_TYPE_ALIASES = Object.freeze({
  device_universal: 'deviceUniversal',
})

export const createResourceKey = (prefix) => {
  const random = globalThis.crypto?.randomUUID?.().replace(/-/g, '').slice(0, 10)
    || `${Date.now()}${Math.random().toString(16).slice(2, 8)}`
  return `${prefix}_${random}`
}

export const createDefaultRobotRole = (legacyRobotId = '') => ({
  roleKey: DEFAULT_ROLE_KEY,
  resourceType: 'ROBOT',
  displayName: '执行机器人',
  required: true,
  quantity: { min: 1, max: 1 },
  deviceSlots: [],
  ...(legacyRobotId ? { legacyRobotId } : {}),
})

export const createDeviceSlot = (deviceKind, existingSlots = [], displayName = '') => {
  const meta = DEVICE_KIND_META[Number(deviceKind)] || { key: 'device', name: '执行设备' }
  const usedKeys = new Set(existingSlots.map((slot) => slot.slotKey))
  let index = 1
  let slotKey = meta.key
  while (usedKeys.has(slotKey)) slotKey = `${meta.key}_${++index}`
  const sameKindCount = existingSlots.filter((slot) => Number(slot.deviceKind) === Number(deviceKind)).length
  return {
    slotKey,
    displayName: displayName || `${meta.name}${sameKindCount ? sameKindCount + 1 : ''}`,
    deviceKind: deviceKind == null ? null : Number(deviceKind),
    required: true,
    allowReuse: false,
  }
}

export const getStartNode = (graph = globalThis.lf?.getGraphData?.()) => (
  graph?.nodes?.find((node) => node.type === 'start')
)

export const getResourceRoles = (graph = globalThis.lf?.getGraphData?.()) => (
  clone(getStartNode(graph)?.properties?.resourceRoles || []) || []
)

const isRobotNode = (node) => node?.properties?.nodeType === 'EDGE'
export const ACTION_QUEUE_ACTION = 'SYSTEM_EXECUTE_ACTION_QUEUE'
export const actionRequiresDevice = (action) => (
  getDeviceKindForAction(action) != null || action === 'DEVICE_EXECUTE_JSON_COMMAND'
)
export const nodeRequiresDevice = (node) => actionRequiresDevice(node?.properties?.action)

const resolveLegacyRobotId = (startProperties) => (
  startProperties?.inputParams?.find((item) => item.name === 'robotId')?.input
  || startProperties?.robotId
  || ''
)

const findOrCreateLegacySlot = (role, node, legacySlotByIdentity, legacyDeviceId = '') => {
  const kind = getDeviceKindForAction(node.properties?.action)
  const normalizedDeviceId = normalizedText(legacyDeviceId)
  const identity = `${role.roleKey}:${kind ?? 'any'}:${normalizedDeviceId || 'default'}`
  if (legacySlotByIdentity.has(identity)) return legacySlotByIdentity.get(identity)

  const slot = createDeviceSlot(kind, role.deviceSlots)
  slot.managedBy = FLOW_NODE_RESOURCE_OWNER
  if (normalizedDeviceId) slot.legacyDeviceId = normalizedDeviceId
  role.deviceSlots.push(slot)
  legacySlotByIdentity.set(identity, slot)
  return slot
}

/**
 * Loads old graphs as Schema V2 without mutating the source object. Physical IDs are
 * retained only as migration hints and are consumed by the trial-run assignment form.
 */
export const normalizeFlowResourceSchema = (sourceGraph) => {
  const graph = clone(sourceGraph || { nodes: [], edges: [] })
  graph.nodes = Array.isArray(graph.nodes) ? graph.nodes : []
  graph.edges = Array.isArray(graph.edges) ? graph.edges : []
  graph.nodes.forEach((node) => {
    node.type = LEGACY_NODE_TYPE_ALIASES[node.type] || node.type
    // 早期图片分析图数据可能只保存节点类型，加载时补齐运行端识别所需的协议字段。
    const properties = node.properties || (node.properties = {})
    if (['AGV_MOVE_TO_POINT', 'AGV_MOVE_TO_STATION'].includes(properties.action)) {
      properties.nodeParams = Array.isArray(properties.nodeParams) ? properties.nodeParams : []
      if (!properties.nodeParams.some((param) => param?.name === 'blockedTimeoutMs')) {
        properties.nodeParams.push({
          name: 'blockedTimeoutMs',
          type: 'input',
          componentType: 'number',
          input: 60000,
          min: 1,
          required: true,
          disabled: true,
        })
      }
    }
    if (node.type === 'imageAnalysis') {
      const properties = node.properties || (node.properties = {})
      properties.action = 'IMAGE_ANALYZE'
      properties.nodeType = 'LLM'
      properties.outputType = 'json'
      properties.outputParams = clone(IMAGE_ANALYSIS_OUTPUT_PARAMS)
    }
    // 视频分析新增 result/detailedOutput 后，打开旧流程时补齐输出字段，后续节点才能稳定引用。
    if (node.properties?.action === 'VIDEO_ANALYZE') {
      const outputParams = Array.isArray(node.properties.outputParams)
        ? node.properties.outputParams
        : []
      if (!outputParams.some((param) => param?.name === 'result')) {
        outputParams.unshift({ name: 'result', type: 'string', desc: '分析结果', disabled: true })
      }
      if (!outputParams.some((param) => param?.name === 'detailedOutput')) {
        outputParams.push({
          name: 'detailedOutput', type: 'boolean', desc: '是否返回详细事件证据', disabled: true,
        })
      }
      node.properties.outputParams = outputParams
    }
  })
  const start = getStartNode(graph)
  if (!start) return graph

  const startProperties = start.properties || (start.properties = {})
  const legacyRobotId = resolveLegacyRobotId(startProperties)
  const roles = Array.isArray(startProperties.resourceRoles) && startProperties.resourceRoles.length
    ? startProperties.resourceRoles
    : [createDefaultRobotRole(legacyRobotId)]

  roles.forEach((role, index) => {
    role.roleKey ||= index === 0 ? DEFAULT_ROLE_KEY : createResourceKey('robot_role')
    role.resourceType = 'ROBOT'
    role.displayName ||= `机器人角色${index + 1}`
    role.required = role.required !== false
    role.quantity ||= { min: 1, max: 1 }
    role.deviceSlots = Array.isArray(role.deviceSlots) ? role.deviceSlots : []
  })

  startProperties.schemaVersion = FLOW_SCHEMA_VERSION
  startProperties.resourceRoles = roles
  startProperties.inputParams = (startProperties.inputParams || []).filter((item) => item.name !== 'robotId')

  const defaultRole = roles[0]
  const legacySlotByIdentity = new Map()
  roles.forEach((role) => role.deviceSlots.forEach((slot) => {
    const identity = `${role.roleKey}:${slot.deviceKind ?? 'any'}:${slot.legacyDeviceId || 'default'}`
    legacySlotByIdentity.set(identity, slot)
  }))

  graph.nodes.forEach((node) => {
    const properties = node.properties || (node.properties = {})
    if (!isRobotNode(node)) {
      delete properties.executionTarget
      return
    }
    const target = properties.executionTarget || {
      roleKey: defaultRole.roleKey,
      dispatchPolicy: 'ONE',
    }
    target.roleKey ||= defaultRole.roleKey
    target.dispatchPolicy ||= 'ONE'
    const isActionQueue = properties.action === ACTION_QUEUE_ACTION
    if (!isActionQueue) target.deviceSlotKey ||= target.deviceBindings?.[0]?.slotKey || ''
    target.deviceBindings = Array.isArray(target.deviceBindings) ? target.deviceBindings : []

    const targetRole = roles.find((role) => role.roleKey === target.roleKey) || defaultRole
    const deviceParam = properties.nodeParams?.find((param) => param.name === 'deviceId')
    if (nodeRequiresDevice(node) && !target.deviceSlotKey) {
      const slot = findOrCreateLegacySlot(targetRole, node, legacySlotByIdentity, deviceParam?.input)
      if (slot) target.deviceSlotKey = slot.slotKey
    }
    const referencedSlotKeys = new Set([
      target.deviceSlotKey,
      ...target.deviceBindings.map((binding) => binding?.slotKey),
    ].filter(Boolean))
    targetRole.deviceSlots.forEach((slot) => {
      if (referencedSlotKeys.has(slot.slotKey) && !slot.managedBy) slot.managedBy = FLOW_NODE_RESOURCE_OWNER
    })
    if (!isActionQueue) delete target.deviceBindings
    if (isActionQueue) delete target.deviceSlotKey
    properties.nodeParams = (properties.nodeParams || []).filter((param) => param.name !== 'deviceId')
    properties.executionTarget = target
  })

  return graph
}

export const ensureNodeExecutionResources = (sourceGraph, nodeId) => {
  const graph = normalizeFlowResourceSchema(sourceGraph)
  const node = graph.nodes.find((item) => item.id === nodeId)
  return { graph, node, start: getStartNode(graph) }
}

/**
 * Removes role definitions and device usages that were registered automatically
 * for flow nodes and are no longer referenced by any remaining node.
 */
export const pruneUnusedNodeResources = (sourceGraph) => {
  const graph = clone(sourceGraph || { nodes: [], edges: [] })
  const start = getStartNode(graph)
  if (!start?.properties?.resourceRoles) {
    return { graph, start, removedRoles: 0, removedSlots: 0 }
  }

  const usedRoleKeys = new Set()
  const usedSlotsByRole = new Map()
  graph.nodes.filter(isRobotNode).forEach((node) => {
    const target = node.properties?.executionTarget
    if (!target?.roleKey) return
    usedRoleKeys.add(target.roleKey)
    if (!usedSlotsByRole.has(target.roleKey)) usedSlotsByRole.set(target.roleKey, new Set())
    if (target.deviceSlotKey) usedSlotsByRole.get(target.roleKey).add(target.deviceSlotKey)
    ;(target.deviceBindings || []).forEach((binding) => {
      if (binding?.slotKey) usedSlotsByRole.get(target.roleKey).add(binding.slotKey)
    })
  })

  let removedSlots = 0
  start.properties.resourceRoles.forEach((role) => {
    const usedSlotKeys = usedSlotsByRole.get(role.roleKey) || new Set()
    role.deviceSlots = (role.deviceSlots || []).filter((slot) => {
      const shouldRemove = slot.managedBy === FLOW_NODE_RESOURCE_OWNER && !usedSlotKeys.has(slot.slotKey)
      if (shouldRemove) removedSlots += 1
      return !shouldRemove
    })
  })

  const beforeRoleCount = start.properties.resourceRoles.length
  start.properties.resourceRoles = start.properties.resourceRoles.filter((role, index) => (
    index === 0
    || role.managedBy !== FLOW_NODE_RESOURCE_OWNER
    || usedRoleKeys.has(role.roleKey)
  ))

  return {
    graph,
    start,
    removedRoles: beforeRoleCount - start.properties.resourceRoles.length,
    removedSlots,
  }
}

export const validateFlowResources = (sourceGraph) => {
  const graph = normalizeFlowResourceSchema(sourceGraph)
  const roles = getResourceRoles(graph)
  const errors = []
  const roleKeys = new Set()

  roles.forEach((role) => {
    if (!normalizedText(role.displayName)) errors.push({ nodeId: getStartNode(graph)?.id, message: '机器人角色名称不能为空' })
    if (roleKeys.has(role.roleKey)) errors.push({ nodeId: getStartNode(graph)?.id, message: `机器人角色标识重复：${role.roleKey}` })
    roleKeys.add(role.roleKey)
    const slotKeys = new Set()
    ;(role.deviceSlots || []).forEach((slot) => {
      if (!normalizedText(slot.displayName)) errors.push({ nodeId: getStartNode(graph)?.id, message: `${role.displayName}存在未命名的设备用途` })
      if (slotKeys.has(slot.slotKey)) errors.push({ nodeId: getStartNode(graph)?.id, message: `${role.displayName}的设备用途标识重复` })
      slotKeys.add(slot.slotKey)
    })
  })

  graph.nodes.filter(isRobotNode).forEach((node) => {
    const target = node.properties?.executionTarget
    const role = roles.find((item) => item.roleKey === target?.roleKey)
    if (!role) {
      errors.push({ nodeId: node.id, message: `${node.properties?.name || node.id}未选择有效的机器人角色` })
      return
    }
    if (target.deviceSlotKey && !(role.deviceSlots || []).some((slot) => slot.slotKey === target.deviceSlotKey)) {
      errors.push({ nodeId: node.id, message: `${node.properties?.name || node.id}引用的设备用途不存在` })
    }
    ;(target.deviceBindings || []).forEach((binding) => {
      if (!binding?.parameterName || !binding?.slotKey) {
        errors.push({ nodeId: node.id, message: `${node.properties?.name || node.id}存在未配置的队列设备` })
      } else if (!(role.deviceSlots || []).some((slot) => slot.slotKey === binding.slotKey)) {
        errors.push({ nodeId: node.id, message: `${node.properties?.name || node.id}引用的队列设备用途不存在` })
      }
    })
    if (nodeRequiresDevice(node)
      && !target.deviceSlotKey) {
      errors.push({ nodeId: node.id, message: `${node.properties?.name || node.id}未选择设备用途` })
    }
  })
  return { graph, errors }
}

export const sanitizeFlowResourceDefinition = (sourceGraph) => {
  const graph = normalizeFlowResourceSchema(sourceGraph)
  const start = getStartNode(graph)
  ;(start?.properties?.resourceRoles || []).forEach((role) => {
    delete role.legacyRobotId
    ;(role.deviceSlots || []).forEach((slot) => delete slot.legacyDeviceId)
  })
  graph.nodes.filter(isRobotNode).forEach((node) => {
    node.properties.nodeParams = (node.properties?.nodeParams || []).filter((param) => param.name !== 'deviceId')
  })
  return graph
}

export const mergeCopiedResourceRoles = (targetGraph, sourceRoles = [], copiedNodes = []) => {
  const graph = normalizeFlowResourceSchema(targetGraph)
  const start = getStartNode(graph)
  const targetRoles = start.properties.resourceRoles
  let addedRoles = 0
  let addedSlots = 0

  copiedNodes.filter(isRobotNode).forEach((node) => {
    const target = node.properties?.executionTarget
    if (!target?.roleKey) return
    const sourceRole = sourceRoles.find((role) => role.roleKey === target.roleKey)
    let targetRole = targetRoles.find((role) => role.roleKey === target.roleKey)
      || targetRoles.find((role) => sourceRole && role.displayName === sourceRole.displayName)

    if (!targetRole && sourceRole) {
      targetRole = clone(sourceRole)
      targetRole.managedBy = FLOW_NODE_RESOURCE_OWNER
      delete targetRole.legacyRobotId
      ;(targetRole.deviceSlots || []).forEach((slot) => {
        slot.managedBy = FLOW_NODE_RESOURCE_OWNER
        delete slot.legacyDeviceId
      })
      targetRoles.push(targetRole)
      addedRoles += 1
      addedSlots += targetRole.deviceSlots?.length || 0
    }
    targetRole ||= targetRoles[0]
    target.roleKey = targetRole.roleKey

    const remapSlot = (slotKey) => {
      if (!slotKey || targetRole.deviceSlots?.some((slot) => slot.slotKey === slotKey)) return slotKey
      const sourceSlot = sourceRole?.deviceSlots?.find((slot) => slot.slotKey === slotKey)
      const sameSlot = targetRole.deviceSlots?.find((slot) => (
        sourceSlot && slot.displayName === sourceSlot.displayName && Number(slot.deviceKind) === Number(sourceSlot.deviceKind)
      ))
      if (sameSlot) return sameSlot.slotKey
      const newSlot = sourceSlot ? clone(sourceSlot) : createDeviceSlot(getDeviceKindForAction(node.properties?.action), targetRole.deviceSlots)
      newSlot.managedBy = FLOW_NODE_RESOURCE_OWNER
      delete newSlot.legacyDeviceId
      targetRole.deviceSlots.push(newSlot)
      addedSlots += 1
      return newSlot.slotKey
    }
    target.deviceSlotKey = remapSlot(target.deviceSlotKey)
    ;(target.deviceBindings || []).forEach((binding) => {
      binding.slotKey = remapSlot(binding.slotKey)
    })
    const bindingSlotByName = new Map((target.deviceBindings || []).map((binding) => (
      [binding.parameterName, binding.slotKey]
    )))
    const queueStepsParam = node.properties?.nodeParams?.find((param) => param.name === 'steps')
    if (Array.isArray(queueStepsParam?.input)) {
      queueStepsParam.input.forEach((step) => {
        if (bindingSlotByName.has(step?.deviceBindingKey)) {
          step.deviceSlotKey = bindingSlotByName.get(step.deviceBindingKey)
        }
      })
    }
  })

  return { graph, start, addedRoles, addedSlots }
}

export const getDeviceKindName = (deviceKind) => DEVICE_KIND_META[Number(deviceKind)]?.name || '任意设备'

export const mergeResourceRoleDefinitions = (roleGroups = []) => {
  const merged = []
  roleGroups.flat().forEach((sourceRole) => {
    let role = merged.find((item) => item.roleKey === sourceRole.roleKey)
    if (!role) {
      merged.push(clone(sourceRole))
      return
    }
    role.required = role.required !== false || sourceRole.required !== false
    ;(sourceRole.deviceSlots || []).forEach((sourceSlot) => {
      const slot = role.deviceSlots.find((item) => item.slotKey === sourceSlot.slotKey)
      if (!slot) {
        role.deviceSlots.push(clone(sourceSlot))
        return
      }
      slot.required = slot.required !== false || sourceSlot.required !== false
      slot.allowReuse = slot.allowReuse === true && sourceSlot.allowReuse === true
    })
  })
  return merged
}