import { Component, OnChanges, OnInit, inject, input, output, viewChild } from '@angular/core'
import { AuthService, ConfirmService, HooksService, Notifier, ServerService, UserService } from '@app/core'
import { BulkRemoveCommentsOfBody, User, UserRight } from '@peertube/peertube-models'
import { Account } from '../shared-main/account/account.model'
import { ActionDropdownComponent, DropdownAction } from '../shared-main/buttons/action-dropdown.component'
import { UserAdminService } from '../shared-users/user-admin.service'
import { BlocklistService } from './blocklist.service'
import { BulkService } from './bulk.service'
import { UserBanModalComponent } from './user-ban-modal.component'

export type AccountMutedStatus = Pick<
  Account,
  'id' | 'nameWithHost' | 'host' | 'userId' | 'mutedByInstance' | 'mutedByUser' | 'mutedServerByInstance' | 'mutedServerByUser'
>

export type UserModerationDisplayType = {
  myAccount?: boolean
  instanceAccount?: boolean
  instanceUser?: boolean
}

@Component({
  selector: 'my-user-moderation-dropdown',
  templateUrl: './user-moderation-dropdown.component.html',
  imports: [ UserBanModalComponent, ActionDropdownComponent ]
})
export class UserModerationDropdownComponent implements OnInit, OnChanges {
  private authService = inject(AuthService)
  private notifier = inject(Notifier)
  private confirmService = inject(ConfirmService)
  private serverService = inject(ServerService)
  private userAdminService = inject(UserAdminService)
  private blocklistService = inject(BlocklistService)
  private bulkService = inject(BulkService)
  private userService = inject(UserService)
  private hooks = inject(HooksService)

  readonly userBanModal = viewChild<UserBanModalComponent>('userBanModal')

  readonly user = input<User>(undefined)
  readonly account = input<AccountMutedStatus>(undefined)
  readonly prependActions = input<DropdownAction<{
    user: User
    account: AccountMutedStatus
  }>[]>(undefined)

  readonly buttonSize = input<'normal' | 'small'>('normal')
  readonly buttonStyled = input(true)
  readonly placement = input('right-top right-bottom auto')
  readonly label = input<string>(undefined)
  readonly container = input<'body' | undefined>(undefined)

  readonly displayOptions = input<UserModerationDisplayType>({
    myAccount: true,
    instanceAccount: true,
    instanceUser: true
  })

  readonly userChanged = output()
  readonly userDeleted = output()

  userActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[][] = []

  requiresEmailVerification = false

  ngOnInit () {
    this.serverService.getConfig()
      .subscribe(config => this.requiresEmailVerification = config.signup.requiresEmailVerification)
  }

  ngOnChanges () {
    this.buildActions()
  }

  openBanUserModal (user: User) {
    if (user.username === 'root') {
      this.notifier.error($localize`You cannot ban root.`)
      return
    }

    this.userBanModal().openModal(user)
  }

  onUserBanned () {
    this.userChanged.emit()
  }

  async unbanUser (user: User) {
    const res = await this.confirmService.confirm($localize`Do you really want to unban ${user.username}?`, $localize`Unban`)
    if (res === false) return

    this.userAdminService.unbanUsers(user)
      .subscribe({
        next: () => {
          this.notifier.success($localize`User ${user.username} unbanned.`)
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  async removeUser (user: User) {
    if (user.username === 'root') {
      this.notifier.error($localize`You cannot delete root.`)
      return
    }

    const message =
      // eslint-disable-next-line max-len
      $localize`If you remove this user, you won't be able to create another user or channel with <strong>${user.username}</strong> username!`
    const res = await this.confirmService.confirm(message, $localize`Delete ${user.username}`)
    if (res === false) return

    this.userAdminService.removeUsers(user)
      .subscribe({
        next: () => {
          this.notifier.success($localize`User ${user.username} deleted.`)
          this.userDeleted.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  setEmailAsVerified (user: User) {
    this.userAdminService.updateUser(user.id, { emailVerified: true })
      .subscribe({
        next: () => {
          this.notifier.success($localize`User ${user.username} email set as verified`)
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  resendVerificationEmail (user: User) {
    this.userService.askSendVerifyEmail(user.email)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Verification email sent to ${user.email}`)
        },

        error: err => this.notifier.handleError(err)
      })
  }

  blockAccountByUser (account: AccountMutedStatus) {
    this.blocklistService.blockAccountByUser(account)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Account ${account.nameWithHost} muted.`)

          this.account().mutedByUser = true
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  unblockAccountByUser (account: AccountMutedStatus) {
    this.blocklistService.unblockAccountByUser(account)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Account ${account.nameWithHost} unmuted.`)

          this.account().mutedByUser = false
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  blockServerByUser (host: string) {
    this.blocklistService.blockServerByUser(host)
      .subscribe({
        next: () => {
          this.notifier.success($localize`${host} muted.`)

          this.account().mutedServerByUser = true
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  unblockServerByUser (host: string) {
    this.blocklistService.unblockServerByUser(host)
      .subscribe({
        next: () => {
          this.notifier.success($localize`${host} unmuted.`)

          this.account().mutedServerByUser = false
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  blockAccountByInstance (account: AccountMutedStatus) {
    this.blocklistService.blockAccountByInstance(account)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Account ${account.nameWithHost} muted by your platform.`)

          this.account().mutedByInstance = true
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  unblockAccountByInstance (account: AccountMutedStatus) {
    this.blocklistService.unblockAccountByInstance(account)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Account ${account.nameWithHost} unmuted by your platform.`)

          this.account().mutedByInstance = false
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  blockServerByInstance (host: string) {
    this.blocklistService.blockServerByInstance(host)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Instance ${host} muted by the instance.`)

          this.account().mutedServerByInstance = true
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  unblockServerByInstance (host: string) {
    this.blocklistService.unblockServerByInstance(host)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Instance ${host} unmuted by the instance.`)

          this.account().mutedServerByInstance = false
          this.userChanged.emit()
        },

        error: err => this.notifier.handleError(err)
      })
  }

  async bulkRemoveCommentsOf (body: BulkRemoveCommentsOfBody) {
    const message = $localize`Are you sure you want to remove all the comments of this account?`
    const res = await this.confirmService.confirm(message, $localize`Delete account comments`)
    if (res === false) return

    this.bulkService.removeCommentsOf(body)
      .subscribe({
        next: () => {
          this.notifier.success($localize`Will remove comments of this account (may take several minutes).`)
        },

        error: err => this.notifier.handleError(err)
      })
  }

  getRouterUserEditLink (user: User) {
    return [ '/admin', 'overview', 'users', 'update', user.id ]
  }

  private isMyUser (user: User) {
    return user && this.authService.getUser().id === user.id
  }

  private isMyAccount (account: AccountMutedStatus) {
    return account && this.authService.getUser().account.id === account.id
  }

  private async buildActions () {
    const userActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[][] = []

    const prependActions = this.prependActions()
    if (prependActions && prependActions.length !== 0) {
      userActions.push(prependActions)
    }

    const myAccountModerationActions = this.buildMyAccountModerationActions()
    const instanceModerationActions = this.buildInstanceModerationActions()

    if (myAccountModerationActions.length !== 0) userActions.push(myAccountModerationActions)
    if (instanceModerationActions.length !== 0) userActions.push(...instanceModerationActions)

    this.userActions = await this.hooks.wrapObject(userActions, 'moderation', 'filter:user-moderation.actions.create.result')
  }

  private buildMyAccountModerationActions () {
    if (!this.account() || !this.displayOptions().myAccount || !this.authService.isLoggedIn()) return []

    const myAccountActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[] = [
      {
        label: $localize`My account moderation`,
        isHeader: true
      },
      {
        label: $localize`Mute this account`,
        description: $localize`Hide any content from that user from you.`,
        isDisplayed: ({ account }) => !this.isMyAccount(account) && account.mutedByUser === false,
        handler: ({ account }) => this.blockAccountByUser(account)
      },
      {
        label: $localize`Unmute this account`,
        description: $localize`Show back content from that user for you.`,
        isDisplayed: ({ account }) => !this.isMyAccount(account) && account.mutedByUser === true,
        handler: ({ account }) => this.unblockAccountByUser(account)
      },
      {
        label: $localize`Mute the platform`,
        description: $localize`Hide any content from that platform for you.`,
        isDisplayed: ({ account }) => !account.userId && account.mutedServerByUser === false,
        handler: ({ account }) => this.blockServerByUser(account.host)
      },
      {
        label: $localize`Unmute the platform`,
        description: $localize`Show back content from that platform for you.`,
        isDisplayed: ({ account }) => !account.userId && account.mutedServerByUser === true,
        handler: ({ account }) => this.unblockServerByUser(account.host)
      },
      {
        label: $localize`Remove comments from your videos`,
        description: $localize`Remove comments made by this account on your videos.`,
        isDisplayed: ({ account }) => !this.isMyAccount(account),
        handler: ({ account }) => this.bulkRemoveCommentsOf({ accountName: account.nameWithHost, scope: 'my-videos' })
      }
    ]

    return myAccountActions
  }

  private buildInstanceModerationActions () {
    if (!this.authService.isLoggedIn()) return []

    const authUser = this.authService.getUser()

    const instanceActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[][] = []

    const displayOptions = this.displayOptions()

    const hasManageRight = this.user() && displayOptions.instanceUser && authUser.hasRight(UserRight.MANAGE_USERS) &&
      authUser.canManage(this.user())

    const hasAccountBlocklistRight = this.account() && displayOptions.instanceAccount &&
      authUser.hasRight(UserRight.MANAGE_ACCOUNTS_BLOCKLIST)
    const hasServerBlocklistRight = displayOptions.instanceAccount && authUser.hasRight(UserRight.MANAGE_SERVERS_BLOCKLIST)
    const hasBulkRemoveCommentsRight = displayOptions.instanceAccount && authUser.hasRight(UserRight.MANAGE_ANY_VIDEO_COMMENT)

    if (hasManageRight) {
      instanceActions.push([
        { label: $localize`Manage user`, isHeader: true },

        {
          label: $localize`Edit user`,
          description: $localize`Change quota, role, and more.`,
          linkBuilder: ({ user }) => this.getRouterUserEditLink(user)
        },

        {
          label: $localize`Set email as verified`,
          handler: ({ user }) => this.setEmailAsVerified(user),
          isDisplayed: ({ user }) => !user.blocked && user.emailVerified !== true
        },
        {
          label: $localize`Re-send verification email`,
          handler: ({ user }) => this.resendVerificationEmail(user),
          isDisplayed: ({ user }) => !user.blocked && user.emailVerified !== true && !user.pluginAuth
        }
      ])
    }

    // Instance actions on account blocklists

    if (hasAccountBlocklistRight || hasManageRight) {
      let platformModerationActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[] = [
        { label: $localize`Platform account moderation`, isHeader: true }
      ]

      if (hasAccountBlocklistRight) {
        platformModerationActions = platformModerationActions.concat([
          {
            label: $localize`Mute this account`,
            description: $localize`Hide any content from that user from you, your platform and its users.`,
            isDisplayed: ({ account }) => !this.isMyAccount(account) && account.mutedByInstance === false,
            handler: ({ account }) => this.blockAccountByInstance(account)
          },
          {
            label: $localize`Unmute this account`,
            description: $localize`Show this user's content to the users of this platform again.`,
            isDisplayed: ({ account }) => !this.isMyAccount(account) && account.mutedByInstance === true,
            handler: ({ account }) => this.unblockAccountByInstance(account)
          }
        ])
      }

      if (hasManageRight) {
        platformModerationActions = platformModerationActions.concat([
          {
            label: $localize`Ban`,
            description: $localize`User won't be able to login anymore, but videos and comments will be kept as is.`,
            handler: ({ user }) => this.openBanUserModal(user),
            isDisplayed: ({ user }) => !this.isMyUser(user) && !user.blocked
          },
          {
            label: $localize`Unban user`,
            description: $localize`Allow the user to login and create videos/comments again`,
            handler: ({ user }) => this.unbanUser(user),
            isDisplayed: ({ user }) => !this.isMyUser(user) && user.blocked
          }
        ])
      }

      instanceActions.push(platformModerationActions)
    }

    // Instance actions on server blocklists
    if (hasServerBlocklistRight) {
      instanceActions.push([
        { label: $localize`Platform server moderation`, isHeader: true },

        {
          label: $localize`Mute the platform`,
          description: $localize`Hide any content from that platform from you, your platform and its users.`,
          isDisplayed: ({ account }) => !account.userId && account.mutedServerByInstance === false,
          handler: ({ account }) => this.blockServerByInstance(account.host)
        },
        {
          label: $localize`Unmute the platform by your platform`,
          description: $localize`Show back content from that platform for you, your platform and its users.`,
          isDisplayed: ({ account }) => !account.userId && account.mutedServerByInstance === true,
          handler: ({ account }) => this.unblockServerByInstance(account.host)
        }
      ])
    }

    if (hasBulkRemoveCommentsRight || hasManageRight) {
      const dangerActions: DropdownAction<{ user: User, account: AccountMutedStatus }>[] = [
        { label: $localize`Platform danger zone`, isHeader: true }
      ]

      if (hasBulkRemoveCommentsRight) {
        dangerActions.push(
          {
            label: $localize`Remove comments from your platform`,
            description: $localize`Remove comments made by this account from your platform.`,
            isDisplayed: ({ account }) => !this.isMyAccount(account),
            handler: ({ account }) => this.bulkRemoveCommentsOf({ accountName: account.nameWithHost, scope: 'instance' })
          }
        )
      }

      if (hasManageRight) {
        dangerActions.push({
          label: $localize`Delete user`,
          description: $localize`Videos will be deleted, comments will be tombstoned.`,
          isDisplayed: ({ user }) => !this.isMyUser(user),
          handler: ({ user }) => this.removeUser(user)
        })
      }

      instanceActions.push(dangerActions)
    }

    return instanceActions
  }
}
