import * as React from 'react'
import { MessageResponse } from '../../components/MessageResponse.js'
import { Text } from '@anthropic/ink'
import { truncateToWidth } from '../format.js'
import type { MCPToolResult } from '../mcpValidation.js'

type CuToolInput = Record<string, unknown> & {
  coordinate?: [number, number]
  start_coordinate?: [number, number]
  text?: string
  apps?: Array<{ displayName?: string }>
  region?: [number, number, number, number]
  direction?: string
  amount?: number
  duration?: number
}

function fmtCoord(c: [number, number] | undefined): string {
  return c ? `(${c[0]}, ${c[1]})` : ''
}

const RESULT_SUMMARY: Readonly<Partial<Record<string, string>>> = {
  screenshot: 'Captured',
  zoom: 'Captured',
  request_access: 'Access updated',
  left_click: 'Clicked',
  right_click: 'Clicked',
  middle_click: 'Clicked',
  double_click: 'Clicked',
  triple_click: 'Clicked',
  type: 'Typed',
  key: 'Pressed',
  hold_key: 'Pressed',
  scroll: 'Scrolled',
  left_click_drag: 'Dragged',
  open_application: 'Opened',
}

/**
 * Rendering overrides for `mcp__computer-use__*` tools. Spread into the MCP
 * tool object in `client.ts` after the default `userFacingName`, so these win.
 * Mirror of `getClaudeInChromeMCPToolOverrides`.
 */
export function getComputerUseMCPRenderingOverrides(toolName: string): {
  userFacingName: () => string
  renderToolUseMessage: (
    input: Record<string, unknown>,
    options: { verbose: boolean },
  ) => React.ReactNode
  renderToolResultMessage: (
    output: MCPToolResult,
    progressMessages: unknown[],
    options: { verbose: boolean },
  ) => React.ReactNode
} {
  return {
    userFacingName() {
      return `Computer Use[${toolName}]`
    },

    // AssistantToolUseMessage.tsx contract: null hides the ENTIRE row, '' shows
    // the tool name without "(args)". Every path below returns '' when there's
    // nothing to show — never null.
    renderToolUseMessage(input: CuToolInput) {
      switch (toolName) {
        case 'screenshot':
        case 'left_mouse_down':
        case 'left_mouse_up':
        case 'cursor_position':
        case 'list_granted_applications':
        case 'read_clipboard':
          return ''

        case 'left_click':
        case 'right_click':
        case 'middle_click':
        case 'double_click':
        case 'triple_click':
        case 'mouse_move':
          return fmtCoord(input.coordinate)

        case 'left_click_drag':
          return input.start_coordinate
            ? `${fmtCoord(input.start_coordinate)} → ${fmtCoord(input.coordinate)}`
            : `to ${fmtCoord(input.coordinate)}`

        case 'type':
          return typeof input.text === 'string'
            ? `"${truncateToWidth(input.text, 40)}"`
            : ''

        case 'key':
        case 'hold_key':
          return typeof input.text === 'string' ? input.text : ''

        case 'scroll':
          return [
            input.direction,
            input.amount && `×${input.amount}`,
            input.coordinate && `at ${fmtCoord(input.coordinate)}`,
          ]
            .filter(Boolean)
            .join(' ')

        case 'zoom': {
          const r = input.region
          return Array.isArray(r) && r.length === 4
            ? `[${r[0]}, ${r[1]}, ${r[2]}, ${r[3]}]`
            : ''
        }

        case 'wait':
          return typeof input.duration === 'number' ? `${input.duration}s` : ''

        case 'write_clipboard':
          return typeof input.text === 'string'
            ? `"${truncateToWidth(input.text, 40)}"`
            : ''

        case 'open_application':
          return typeof input.bundle_id === 'string'
            ? String(input.bundle_id)
            : ''

        case 'request_access': {
          const apps = input.apps
          if (!Array.isArray(apps)) return ''
          const names = apps
            .map(a => (typeof a?.displayName === 'string' ? a.displayName : ''))
            .filter(Boolean)
          return names.join(', ')
        }

        case 'computer_batch': {
          const actions = input.actions
          return Array.isArray(actions) ? `${actions.length} actions` : ''
        }

        default:
          return ''
      }
    },

    renderToolResultMessage(output, _progress, { verbose }) {
      if (verbose || typeof output !== 'object' || output === null) return null

      // Non-verbose: one-line dim summary, like Chrome's pattern.
      const summary = RESULT_SUMMARY[toolName]
      if (!summary) return null
      return (
        <MessageResponse height={1}>
          <Text dimColor>{summary}</Text>
        </MessageResponse>
      )
    },
  }
}
