import { getModelForClass, index, modelOptions, mongoose, pre, prop, Ref, Severity } from '@typegoose/typegoose'
import { BlockChain } from 'chain/BlockChain'
import { MAX_BATCH_REQ_COUNT, ZERO_BYTES32 } from 'common/Constants'
import { dbconn } from 'decorators/dbconn'
import { generateRandomBytes32 } from 'utils/wallet.util'

import { BaseModule } from './Base'
import { ReqTaskStatus, RequestTask, RequestTaskClass } from './RequestTask'

export enum TaskStatus {
  NOTSTART = 0,
  PEDING = 1,
  SUCCESS = 2,
  TX_ALL_CONFIRM = 3,
  TX_PART_ERROR = 8,
  TX_ERROR = 9,
}

@dbconn()
@index({ taskId: 1 }, { unique: false })
@modelOptions({
  schemaOptions: { collection: 'chain_task', timestamps: true },
  options: { allowMixed: Severity.ALLOW },
})
export class ChainTaskClass extends BaseModule {
  @prop({ required: true })
  public taskId!: string
  @prop()
  public name: string
  @prop()
  public desc: string
  @prop()
  public starter: string

  @prop({ type: mongoose.Schema.Types.Mixed })
  public taskData: any

  @prop({ enum: TaskStatus, default: TaskStatus.NOTSTART })
  public status: TaskStatus

  @prop()
  public startTime: number

  @prop()
  public endTime: number

  @prop({ required: true, default: true })
  public newRecord: boolean

  @prop({ required: true, default: false })
  public allEnd: boolean

  @prop({ required: true, default: 0 })
  public successCount: number

  @prop({ required: true, default: 0 })
  public errorCount: number

  @prop({ type: String, required: true, default: [] })
  public tasks!: Array<string>

  /**
   * 检查是否所有的任务都已完成(成功或重试次数达到上限)
   * 调用时机
   * 1. 每个 request task 成功
   * 2. 每个 request task 重试达到预设次数
   * @param chainTaskId
   */
  public static async checkStatus(chainTaskId: string) {
    let record = await ChainTask.findById(chainTaskId)
    let sCount = 0
    let errCount = 0
    for (let subId of record.tasks) {
      let subData = await RequestTask.findById(subId)
      if (subData.status === ReqTaskStatus.SUCCESS) {
        sCount += 1
      } else if (subData.status === ReqTaskStatus.ERROR) {
        errCount += 1
      }
    }
    record.successCount = sCount
    record.errorCount = errCount
    if (sCount === record.tasks.length) {
      record.status = TaskStatus.TX_ALL_CONFIRM
      record.allEnd = true
    } else {
      record.allEnd = false
      if (record.status === TaskStatus.NOTSTART && sCount > 0) {
        record.status = TaskStatus.PEDING
      } else if (errCount === record.tasks.length) {
        record.status = TaskStatus.TX_ERROR
        record.allEnd = true
      } else if (errCount + sCount === record.tasks.length) {
        record.status = TaskStatus.TX_PART_ERROR
        record.allEnd = true
      }
    }
    await record.save()
    if (record.allEnd) {
      setImmediate(async function () {
        // TODO:: 通知前端
      })
    }
  }

  public static async allUnFinishedTask() {
    return ChainTask.find({ allEnd: false })
  }

  /**
   * 解析企业微信审批信息
   */
  public static async parseWxApprovalInfo({ taskId, name, desc, data, starter }) {
    let maxTryCount = parseInt(process.env.CHAIN_MAX_TRY)
    let chainTask = await ChainTask.insertOrUpdate({ taskId }, { name, desc, starter, data })
    let subTasks: any = []
    if (chainTask.newRecord) {
      let subTask
      let index = 0
      for (let sub of data) {
        if (!subTask || subTask.reqDatas.length >= MAX_BATCH_REQ_COUNT) {
          index += 1
          subTask = new RequestTask({
            taskId,
            index,
            chainTaskId: chainTask.id,
            reqDatas: [],
            maxTryCount,
            predecessor: ZERO_BYTES32,
            salt: generateRandomBytes32(),
          })
          subTasks.push(subTask)
        }
        subTask.reqDatas.push(sub)
        subTask.targets.push(sub.address)
        let abi = await new BlockChain().generateFunAbi(sub)
        subTask.datas.push(abi)
        subTask.values.push('0')
        await subTask.save()
        chainTask.tasks.pushOnce(subTask.id)
      }
    }
    chainTask.newRecord = false
    await chainTask.save()
    return subTasks
  }
}

export const ChainTask = getModelForClass(ChainTaskClass, { existingConnection: ChainTaskClass['db'] })