import * as React from 'react'
import { useCallback } from 'react'
import { Select } from '../../../components/CustomSelect/select.js'
import { Box, Text } from '../../../ink.js'
import type { ToolPermissionContext } from '../../../Tool.js'
import type {
  PermissionBehavior,
  PermissionRule,
  PermissionRuleValue,
} from '../../../utils/permissions/PermissionRule.js'
import {
  applyPermissionUpdate,
  persistPermissionUpdate,
} from '../../../utils/permissions/PermissionUpdate.js'
import { permissionRuleValueToString } from '../../../utils/permissions/permissionRuleParser.js'
import {
  detectUnreachableRules,
  type UnreachableRule,
} from '../../../utils/permissions/shadowedRuleDetection.js'
import { SandboxManager } from '../../../utils/sandbox/sandbox-adapter.js'
import {
  type EditableSettingSource,
  SOURCES,
} from '../../../utils/settings/constants.js'
import { getRelativeSettingsFilePathForSource } from '../../../utils/settings/settings.js'
import { plural } from '../../../utils/stringUtils.js'
import type { OptionWithDescription } from '../../CustomSelect/select.js'
import { Dialog } from '../../design-system/Dialog.js'
import { PermissionRuleDescription } from './PermissionRuleDescription.js'

export function optionForPermissionSaveDestination(
  saveDestination: EditableSettingSource,
): OptionWithDescription {
  switch (saveDestination) {
    case 'localSettings':
      return {
        label: 'Project settings (local)',
        description: `Saved in ${getRelativeSettingsFilePathForSource('localSettings')}`,
        value: saveDestination,
      }
    case 'projectSettings':
      return {
        label: 'Project settings',
        description: `Checked in at ${getRelativeSettingsFilePathForSource('projectSettings')}`,
        value: saveDestination,
      }
    case 'userSettings':
      return {
        label: 'User settings',
        description: `Saved in at ~/.claude/settings.json`,
        value: saveDestination,
      }
  }
}

type Props = {
  onAddRules: (rules: PermissionRule[], unreachable?: UnreachableRule[]) => void
  onCancel: () => void
  ruleValues: PermissionRuleValue[]
  ruleBehavior: PermissionBehavior
  initialContext: ToolPermissionContext
  setToolPermissionContext: (newContext: ToolPermissionContext) => void
}

export function AddPermissionRules({
  onAddRules,
  onCancel,
  ruleValues,
  ruleBehavior,
  initialContext,
  setToolPermissionContext,
}: Props): React.ReactNode {
  const allOptions = SOURCES.map(optionForPermissionSaveDestination)

  const onSelect = useCallback(
    (selectedValue: string) => {
      if (selectedValue === 'cancel') {
        onCancel()
        return
      } else if ((SOURCES as readonly string[]).includes(selectedValue)) {
        const destination = selectedValue as EditableSettingSource

        const updatedContext = applyPermissionUpdate(initialContext, {
          type: 'addRules',
          rules: ruleValues,
          behavior: ruleBehavior,
          destination,
        })

        // Persist to settings
        persistPermissionUpdate({
          type: 'addRules',
          rules: ruleValues,
          behavior: ruleBehavior,
          destination,
        })

        setToolPermissionContext(updatedContext)

        const rules: PermissionRule[] = ruleValues.map(ruleValue => ({
          ruleValue,
          ruleBehavior,
          source: destination,
        }))

        // Check for unreachable rules among the ones we just added
        const sandboxAutoAllowEnabled =
          SandboxManager.isSandboxingEnabled() &&
          SandboxManager.isAutoAllowBashIfSandboxedEnabled()
        const allUnreachable = detectUnreachableRules(updatedContext, {
          sandboxAutoAllowEnabled,
        })

        // Filter to only rules we just added
        const newUnreachable = allUnreachable.filter(u =>
          ruleValues.some(
            rv =>
              rv.toolName === u.rule.ruleValue.toolName &&
              rv.ruleContent === u.rule.ruleValue.ruleContent,
          ),
        )

        onAddRules(
          rules,
          newUnreachable.length > 0 ? newUnreachable : undefined,
        )
      }
    },
    [
      onAddRules,
      onCancel,
      ruleValues,
      ruleBehavior,
      initialContext,
      setToolPermissionContext,
    ],
  )

  const title = `Add ${ruleBehavior} permission ${plural(ruleValues.length, 'rule')}`

  return (
    <Dialog title={title} onCancel={onCancel} color="permission">
      <Box flexDirection="column" paddingX={2}>
        {ruleValues.map(ruleValue => (
          <Box
            flexDirection="column"
            key={permissionRuleValueToString(ruleValue)}
          >
            <Text bold>{permissionRuleValueToString(ruleValue)}</Text>
            <PermissionRuleDescription ruleValue={ruleValue} />
          </Box>
        ))}
      </Box>

      <Box flexDirection="column" marginY={1}>
        <Text>
          {ruleValues.length === 1
            ? 'Where should this rule be saved?'
            : 'Where should these rules be saved?'}
        </Text>
        <Select options={allOptions} onChange={onSelect} />
      </Box>
    </Dialog>
  )
}