import { NgFor, NgIf } from '@angular/common'
import { Component, OnInit, inject, model } from '@angular/core'
import { ServerService } from '@app/core'
import { formatICU } from '@app/helpers'
import { ServerConfig, ServerStats } from '@peertube/peertube-models'
import { of } from 'rxjs'
import { HelpComponent } from '../shared-main/buttons/help.component'
import { BytesPipe } from '../shared-main/common/bytes.pipe'
import { DaysDurationFormatterPipe } from '../shared-main/date/days-duration-formatter.pipe'
import { FeatureBooleanComponent } from './feature-boolean.component'

@Component({
  selector: 'my-instance-features-table',
  templateUrl: './instance-features-table.component.html',
  styleUrls: [ './instance-features-table.component.scss' ],
  imports: [ NgIf, FeatureBooleanComponent, HelpComponent, NgFor, BytesPipe ]
})
export class InstanceFeaturesTableComponent implements OnInit {
  private serverService = inject(ServerService)

  readonly serverConfig = model<ServerConfig>(undefined)
  readonly serverStats = model<ServerStats>(undefined)

  quotaHelpIndication = ''

  get initialUserVideoQuota () {
    return this.serverConfig().user.videoQuota
  }

  get dailyUserVideoQuota () {
    return Math.min(this.initialUserVideoQuota, this.serverConfig().user.videoQuotaDaily)
  }

  get maxInstanceLives () {
    const value = this.serverConfig().live.maxInstanceLives
    if (value === -1) return $localize`Unlimited`

    return value
  }

  get maxUserLives () {
    const value = this.serverConfig().live.maxUserLives
    if (value === -1) return $localize`Unlimited`

    return value
  }

  ngOnInit () {
    const serverConfig = this.serverConfig()
    const serverConfigObs = serverConfig
      ? of(serverConfig)
      : this.serverService.getConfig()

    serverConfigObs.subscribe(config => {
      this.serverConfig.set(config)

      this.buildQuotaHelpIndication()
    })

    if (!this.serverStats()) {
      this.serverService.getServerStats().subscribe(stats => this.serverStats.set(stats))
    }
  }

  buildNSFWLabel () {
    const policy = this.serverConfig().instance.defaultNSFWPolicy

    if (policy === 'do_not_list') return $localize`Hidden`
    if (policy === 'warn') return $localize`Warn users`
    if (policy === 'blur') return $localize`Warn users and blur thumbnail`
    if (policy === 'display') return $localize`Displayed`
  }

  buildRegistrationLabel () {
    const config = this.serverConfig().signup

    if (config.allowed !== true) return $localize`Disabled`

    if (config.requiresApproval === true) {
      const responseTimeMS = this.serverStats()?.averageRegistrationRequestResponseTimeMs

      if (!responseTimeMS) {
        return $localize`Requires approval by moderators`
      }

      const responseTime = new DaysDurationFormatterPipe().transform(responseTimeMS)
      return $localize`Requires approval by moderators (~ ${responseTime})`
    }

    return $localize`Enabled`
  }

  getServerVersionAndCommit () {
    return this.serverService.getServerVersionAndCommit()
  }

  private getApproximateTime (seconds: number) {
    const hours = Math.floor(seconds / 3600)

    if (hours !== 0) {
      return formatICU(
        $localize`~ {hours, plural, =1 {1 hour} other {{hours} hours}}`,
        { hours }
      )
    }

    const minutes = Math.floor(seconds % 3600 / 60)

    return formatICU(
      $localize`~ {minutes, plural, =1 {1 minute} other {{minutes} minutes}}`,
      { minutes }
    )
  }

  private buildQuotaHelpIndication () {
    if (this.initialUserVideoQuota === -1) return

    const initialUserVideoQuotaBit = this.initialUserVideoQuota * 8

    // 1080p: ~ 6Mbps
    // 720p: ~ 4Mbps
    // 360p: ~ 1.5Mbps
    const fullHdSeconds = initialUserVideoQuotaBit / (6 * 1000 * 1000)
    const hdSeconds = initialUserVideoQuotaBit / (4 * 1000 * 1000)
    const normalSeconds = initialUserVideoQuotaBit / (1.5 * 1000 * 1000)

    const lines = [
      $localize`${this.getApproximateTime(fullHdSeconds)} of full HD videos`,
      $localize`${this.getApproximateTime(hdSeconds)} of HD videos`,
      $localize`${this.getApproximateTime(normalSeconds)} of average quality videos`
    ]

    this.quotaHelpIndication = lines.join('<br />')
  }
}