import {
  Component,
  EventEmitter,
  Input,
  OnInit,
  Output,
  ViewEncapsulation
} from '@angular/core'
import SASjs, { SASjsConfig } from '@sasjs/adapter'
import { DcAdapterSettings } from 'src/app/models/DcAdapterSettings'
import { DeployService } from 'src/app/services/deploy.service'
import { EventService } from 'src/app/services/event.service'
import { LoggerService } from 'src/app/services/logger.service'
import { SasViyaService } from 'src/app/services/sas-viya.service'
import { SasService } from 'src/app/services/sas.service'
import { ViyaApiCurrentUser } from 'src/app/viya-api-explorer/models/viya-api-current-user.model'
import {
  Item,
  ViyaApiIdentities
} from 'src/app/viya-api-explorer/models/viya-api-identities.model'
import { ComputeContextDetails } from 'src/app/viya-api-explorer/models/viya-compute-context-details.model'
import {
  ViyaComputeContexts,
  Item as ComputeContextItem
} from 'src/app/viya-api-explorer/models/viya-compute-contexts.model'

@Component({
  selector: 'app-automatic-deploy',
  templateUrl: './automatic.component.html',
  styleUrls: ['./automatic.component.scss'],
  encapsulation: ViewEncapsulation.None
})
export class AutomaticComponent implements OnInit {
  @Input() sasJs!: SASjs
  @Input() sasJsConfig: SASjsConfig = new SASjsConfig()
  @Input() dcAdapterSettings: DcAdapterSettings | undefined
  @Input() appLoc: string = ''
  @Input() dcPath: string = ''
  @Input() selectedAdminGroup: string = ''

  @Output() onNavigateToHome: EventEmitter<any> = new EventEmitter<any>()

  public selectedComputeContext: string = ''
  public makeDataResponse: string = ''
  public jsonFile: any = null
  public autodeploying: boolean = false
  public autodeployDone: boolean = false
  public recreateDatabaseModal: boolean = false
  public isSubmittingJson: boolean = false
  public isJsonSubmitted: boolean = false
  /**
   * Default was `false` when deploy was done with frontend and backend separately.
   * Now we are using only streaming app, so we always want to recreate database (makedata)
   */
  public recreateDatabase: boolean = true
  public createDatabaseLoading: boolean = false
  public adminGroupsLoading: boolean = false
  public currentUserInfoLoading: boolean = false
  public computeContextsLoading: boolean = false
  public adminGroups: { id: string; name: string }[] = []
  public runningAsUser: string | undefined
  public currentUserInfo: ViyaApiCurrentUser | null = null
  public computeContexts: ComputeContextItem[] = []

  /** autoDeployStatus
   * This object presents the status for two steps that we have for deploy.
   * `deployServicePack` - Creating services based on `viya.json`
   * `runMakeData` - Running `makedata` service
   * If any of them is `null` or `false` that means step failed
   * and will be shown to user on deploy done modal.
   */
  public autoDeployStatus: {
    deployServicePack: any
    runMakeData: any
  } = {
    deployServicePack: null,
    runMakeData: null
  }

  constructor(
    private eventService: EventService,
    private deployService: DeployService,
    private sasService: SasService,
    private sasViyaService: SasViyaService,
    private loggerService: LoggerService
  ) {}

  ngOnInit(): void {
    const promiseGetAadminGroups = this.getAdminGroups()
    const getCurrentUser = this.getCurrentUser()
    const getComputeContexts = this.getComputeContexts()

    Promise.all([
      promiseGetAadminGroups,
      getCurrentUser,
      getComputeContexts
    ]).then(() => {
      setTimeout(() => {
        if (this.selectedComputeContext) {
          this.onComputeContextChange(this.selectedComputeContext)
        }
      }, 500)
    })
  }

  public async getComputeContexts() {
    return new Promise<void>((resolve, reject) => {
      this.computeContextsLoading = true

      this.sasViyaService.getComputeContexts().subscribe(
        (res: ViyaComputeContexts) => {
          this.computeContextsLoading = false

          const defaultContext = res.items.find(
            (item: ComputeContextItem) =>
              item.name === 'SAS Job Execution compute context'
          )

          if (defaultContext) {
            this.selectedComputeContext = defaultContext.id
          }

          this.computeContexts = res.items

          resolve()
        },
        (err) => {
          reject(err)
        }
      )
    })
  }

  public async getCurrentUser() {
    return new Promise<void>((resolve, reject) => {
      this.currentUserInfoLoading = true

      this.sasViyaService.getCurrentUser().subscribe(
        (res: ViyaApiCurrentUser) => {
          this.currentUserInfoLoading = false

          this.currentUserInfo = res

          this.dcPath = `/export/viya/homes/${res.id}`

          resolve()
        },
        (err) => {
          console.error('Error while getting current user', err)
          reject(err)
        }
      )
    })
  }

  public async getAdminGroups() {
    return new Promise<void>((resolve, reject) => {
      this.adminGroupsLoading = true

      this.sasViyaService
        .getAdminGroups()
        .subscribe((res: ViyaApiIdentities) => {
          this.adminGroupsLoading = false
          // Map admin groups with only needed fields
          this.adminGroups = res.items.map((item: Item) => {
            return {
              id: item.id,
              name: item.name
            }
          })

          resolve()
        }),
        (err: any) => {
          this.adminGroupsLoading = false
          this.loggerService.error('Error while getting admin groups', err)
          this.eventService.showAbortModal('admin groups', err)

          reject(err)
        }
    })
  }

  public async onComputeContextChange(computeContextId: string) {
    this.sasViyaService
      .getComputeContextById(computeContextId)
      .subscribe((res: ComputeContextDetails) => {
        if (res.attributes && res.attributes.runServerAs) {
          this.runningAsUser = res.attributes.runServerAs
        } else {
          this.runningAsUser = this.currentUserInfo?.id || 'unknown'
        }
      })
  }

  public getComputeContextName(id: string): string | undefined {
    return (
      this.computeContexts.find(
        (context: ComputeContextItem) => context.id === id
      )?.name || undefined
    )
  }

  /**
   * Executes sas.json file to deploy the backend
   * Method will first try to run the `auto deploy`
   * If that fails the rest of the code is ignored.
   * If request is successfull, method will continue to try
   * to create database if checkbox is toggled on
   */
  public async executeJson() {
    this.isSubmittingJson = true

    try {
      let uploadJsonFile = await this.sasJs.deployServicePack(
        this.jsonFile,
        this.dcAdapterSettings?.appLoc,
        undefined,
        undefined,
        true
      )

      this.autoDeployStatus.deployServicePack = true
      this.isJsonSubmitted = true
    } catch (ex: any) {
      let textEx = ''

      if (typeof ex.message !== 'string') {
        textEx = JSON.stringify(ex).replace(/\\/gm, '')
      } else {
        textEx = ex.message
      }

      this.autoDeployStatus.deployServicePack = false
      this.eventService.showInfoModal(
        'Deploy error',
        `Exception: \n ${textEx !== '' ? textEx : ex}`
      )
      this.autodeploying = false
      this.autodeployDone = false

      return
    }

    this.isSubmittingJson = false
  }

  public async runAutoDeploy(executeJson: boolean = false) {
    this.autodeploying = true

    if (executeJson) {
      this.executeJson()
    }

    if (this.recreateDatabase) {
      this.createDatabase()
    } else {
      this.autodeployDone = true
    }
  }

  /**
   * Runs the `makedata` request sending the ADMIN and DCPATH values
   */
  public createDatabase() {
    let data = {
      fromjs: [
        {
          ADMIN: this.selectedAdminGroup,
          DCPATH: this.dcPath
        }
      ]
    }

    // Get and run service using the selected context name
    let selectedComputeContextName = this.sasJsConfig.contextName

    if (this.selectedComputeContext.length && this.computeContexts.length) {
      const computeContextName = this.getComputeContextName(
        this.selectedComputeContext
      )

      if (computeContextName) {
        selectedComputeContextName = computeContextName
      }
    }

    /**
     * We are overriding default `sasjsConfig` object fields with this object fields.
     * Here we want to run this request using original WEB method.
     * contextName: null is the MUST field for it.
     */
    let overrideConfig = {
      useComputeApi: null,
      contextName: selectedComputeContextName,
      debug: true
    }

    this.sasJs
      .request(`services/admin/makedata`, data, overrideConfig, () => {
        this.sasService.shouldLogin.next(true)
      })
      .then((res: any) => {
        this.autodeployDone = true

        try {
          this.makeDataResponse = JSON.stringify(res)
        } catch {
          this.makeDataResponse = res
        }

        if (res.result && res.result.length > 0) {
          this.autoDeployStatus.runMakeData = true
        } else {
          this.autoDeployStatus.runMakeData = false
        }

        if (typeof res.sasjsAbort !== 'undefined') {
          const abortRes = res
          const abortMsg = abortRes.sasjsAbort[0].MSG
          const macMsg = abortRes.sasjsAbort[0].MAC

          this.eventService.showAbortModal('makedata', abortMsg, {
            SYSWARNINGTEXT: abortRes.SYSWARNINGTEXT,
            SYSERRORTEXT: abortRes.SYSERRORTEXT,
            MAC: macMsg
          })
        }

        this.updateIndexHtmlComputeContext()
      })
      .catch((err: any) => {
        this.eventService.showAbortModal('makedata', JSON.stringify(err))
        this.autoDeployStatus.runMakeData = false
        this.autodeployDone = true

        try {
          this.makeDataResponse = JSON.stringify(err)
        } catch {
          this.makeDataResponse = err
        }
      })
  }

  /**
   * Only when on Viya, this method will update the `contextname` in the `DataController.html` on the SAS drive
   * This is needed to ensure that the DC will use the same compute context `makedata` service used to run against.
   */
  public async updateIndexHtmlComputeContext() {
    const indexHtmlContent = await this.sasService.getFileContent(
      `${this.appLoc}/services`,
      'DataController.html'
    )

    if (!indexHtmlContent) {
      this.loggerService.error(
        `Failed to get DataController.html at ${this.appLoc}/services`
      )
      return
    }

    const computeContextName = this.getComputeContextName(
      this.selectedComputeContext
    )

    if (!computeContextName) {
      this.loggerService.error(
        `Compute context name not found for ID: ${this.selectedComputeContext} | List: ${JSON.stringify(this.computeContexts)}`
      )
      return
    }

    const updatedContent = indexHtmlContent.replace(
      /contextname="[^"]*"/g,
      `contextname="${computeContextName}"`
    )

    await this.sasService
      .updateFileContent(
        `${this.appLoc}/services`,
        'DataController.html',
        updatedContent
      )
      .catch((err: any) => {
        this.loggerService.error(`Failed to update DataController.html: ${err}`)
      })
  }

  public downloadFile(
    content: any,
    filename: string,
    extension: string = 'txt'
  ) {
    this.deployService.downloadFile(content, filename, extension)
  }

  public async onJsonFileChange(event: any) {
    let file = event.target.files[0]

    this.jsonFile = await this.deployService.readFile(file)
  }

  public recreateDatabaseClicked(event: Event) {
    ;(<HTMLInputElement>event.target).checked === true
      ? (this.recreateDatabaseModal = true)
      : ''
  }

  public clearUploadInput(event: Event) {
    this.deployService.clearUploadInput(event)
  }

  public openSasRequestsModal() {
    this.eventService.openRequestsModal()
  }

  public navigateToHome() {
    this.onNavigateToHome.emit()
  }
}