import { BASH_TOOL_NAME } from '../../../tools/BashTool/toolName.js'
import { extractOutputRedirections } from '../../../utils/bash/commands.js'
import { isClassifierPermissionsEnabled } from '../../../utils/permissions/bashClassifier.js'
import type { PermissionDecisionReason } from '../../../utils/permissions/PermissionResult.js'
import type { PermissionUpdate } from '../../../utils/permissions/PermissionUpdateSchema.js'
import { shouldShowAlwaysAllowOptions } from '../../../utils/permissions/permissionsLoader.js'
import type { OptionWithDescription } from '../../CustomSelect/select.js'
import { generateShellSuggestionsLabel } from '../shellPermissionHelpers.js'

export type BashToolUseOption =
  | 'yes'
  | 'yes-apply-suggestions'
  | 'yes-prefix-edited'
  | 'yes-classifier-reviewed'
  | 'no'

/**
 * Check if a description already exists in the allow list.
 * Compares lowercase and trailing-whitespace-trimmed versions.
 */
function descriptionAlreadyExists(
  description: string,
  existingDescriptions: string[],
): boolean {
  const normalized = description.toLowerCase().trimEnd()
  return existingDescriptions.some(
    existing => existing.toLowerCase().trimEnd() === normalized,
  )
}

/**
 * Strip output redirections so filenames don't show as commands in the label.
 */
function stripBashRedirections(command: string): string {
  const { commandWithoutRedirections, redirections } =
    extractOutputRedirections(command)
  // Only use stripped version if there were actual redirections
  return redirections.length > 0 ? commandWithoutRedirections : command
}

export function bashToolUseOptions({
  suggestions = [],
  decisionReason,
  onRejectFeedbackChange,
  onAcceptFeedbackChange,
  onClassifierDescriptionChange,
  classifierDescription,
  initialClassifierDescriptionEmpty = false,
  existingAllowDescriptions = [],
  yesInputMode = false,
  noInputMode = false,
  editablePrefix,
  onEditablePrefixChange,
}: {
  suggestions?: PermissionUpdate[]
  decisionReason?: PermissionDecisionReason
  onRejectFeedbackChange: (value: string) => void
  onAcceptFeedbackChange: (value: string) => void
  onClassifierDescriptionChange?: (value: string) => void
  classifierDescription?: string
  /** Whether the initial classifier description was empty. When true, hides the option. */
  initialClassifierDescriptionEmpty?: boolean
  existingAllowDescriptions?: string[]
  yesInputMode?: boolean
  noInputMode?: boolean
  /** Editable prefix rule content (e.g., "npm run:*"). When set, replaces Haiku-based suggestions. */
  editablePrefix?: string
  /** Callback when the user edits the prefix value. */
  onEditablePrefixChange?: (value: string) => void
}): OptionWithDescription<BashToolUseOption>[] {
  const options: OptionWithDescription<BashToolUseOption>[] = []

  if (yesInputMode) {
    options.push({
      type: 'input',
      label: 'Yes',
      value: 'yes',
      placeholder: 'and tell Claude what to do next',
      onChange: onAcceptFeedbackChange,
      allowEmptySubmitToCancel: true,
    })
  } else {
    options.push({
      label: 'Yes',
      value: 'yes',
    })
  }

  // Only show "always allow" options when not restricted by allowManagedPermissionRulesOnly
  if (shouldShowAlwaysAllowOptions()) {
    // Show an editable input for the prefix rule instead of the
    // Haiku-generated suggestion label — but only when the suggestions
    // don't contain non-Bash items (addDirectories, Read rules) that
    // the editable prefix can't represent.
    const hasNonBashSuggestions = suggestions.some(
      s =>
        s.type === 'addDirectories' ||
        (s.type === 'addRules' &&
          s.rules?.some(r => r.toolName !== BASH_TOOL_NAME)),
    )
    if (
      editablePrefix !== undefined &&
      onEditablePrefixChange &&
      !hasNonBashSuggestions &&
      suggestions.length > 0
    ) {
      options.push({
        type: 'input',
        label: 'Yes, and don\u2019t ask again for',
        value: 'yes-prefix-edited',
        placeholder: 'command prefix (e.g., npm run:*)',
        initialValue: editablePrefix,
        onChange: onEditablePrefixChange,
        allowEmptySubmitToCancel: true,
        showLabelWithValue: true,
        labelValueSeparator: ': ',
        resetCursorOnUpdate: true,
      })
    } else if (suggestions.length > 0) {
      const label = generateShellSuggestionsLabel(
        suggestions,
        BASH_TOOL_NAME,
        stripBashRedirections,
      )

      if (label) {
        options.push({
          label,
          value: 'yes-apply-suggestions',
        })
      }
    }

    // Add classifier-reviewed option if enabled, the initial description was
    // non-empty, the description doesn't already exist in the allow list,
    // and the decision reason is NOT a server-side classifier block
    // (prompt-based rules don't help when the server-side classifier triggers first).
    // Skip when the editable prefix option is already shown — they serve the
    // same role and having two identical-looking "don't ask again" inputs is confusing.
    const editablePrefixShown = options.some(
      o => o.value === 'yes-prefix-edited',
    )
    if (
      process.env.USER_TYPE === 'ant' &&
      !editablePrefixShown &&
      isClassifierPermissionsEnabled() &&
      onClassifierDescriptionChange &&
      !initialClassifierDescriptionEmpty &&
      !descriptionAlreadyExists(
        classifierDescription ?? '',
        existingAllowDescriptions,
      ) &&
      decisionReason?.type !== 'classifier'
    ) {
      options.push({
        type: 'input',
        label: 'Yes, and don\u2019t ask again for',
        value: 'yes-classifier-reviewed',
        placeholder: 'describe what to allow...',
        initialValue: classifierDescription ?? '',
        onChange: onClassifierDescriptionChange,
        allowEmptySubmitToCancel: true,
        showLabelWithValue: true,
        labelValueSeparator: ': ',
        resetCursorOnUpdate: true,
      })
    }
  }

  if (noInputMode) {
    options.push({
      type: 'input',
      label: 'No',
      value: 'no',
      placeholder: 'and tell Claude what to do differently',
      onChange: onRejectFeedbackChange,
      allowEmptySubmitToCancel: true,
    })
  } else {
    options.push({
      label: 'No',
      value: 'no',
    })
  }

  return options
}