import figures from 'figures'
import * as React from 'react'
import type { KeyboardEvent } from '../../ink/events/keyboard-event.js'
import { Box, Text } from '../../ink.js'
import { useKeybinding } from '../../keybindings/useKeybinding.js'
import type { Tools } from '../../Tool.js'
import { getAgentColor } from '../../tools/AgentTool/agentColorManager.js'
import { getMemoryScopeDisplay } from '../../tools/AgentTool/agentMemory.js'
import { resolveAgentTools } from '../../tools/AgentTool/agentToolUtils.js'
import {
  type AgentDefinition,
  isBuiltInAgent,
} from '../../tools/AgentTool/loadAgentsDir.js'
import { getAgentModelDisplay } from '../../utils/model/agent.js'
import { Markdown } from '../Markdown.js'
import { getActualRelativeAgentFilePath } from './agentFileUtils.js'

type Props = {
  agent: AgentDefinition
  tools: Tools
  allAgents?: AgentDefinition[]
  onBack: () => void
}

export function AgentDetail({ agent, tools, onBack }: Props): React.ReactNode {
  const resolvedTools = resolveAgentTools(agent, tools, false)
  const filePath = getActualRelativeAgentFilePath(agent)
  const backgroundColor = getAgentColor(agent.agentType)

  // Handle Esc to go back
  useKeybinding('confirm:no', onBack, { context: 'Confirmation' })

  // Handle Enter to go back
  const handleKeyDown = (e: KeyboardEvent) => {
    if (e.key === 'return') {
      e.preventDefault()
      onBack()
    }
  }

  function renderToolsList(): React.ReactNode {
    if (resolvedTools.hasWildcard) {
      return <Text>All tools</Text>
    }

    if (!agent.tools || agent.tools.length === 0) {
      return <Text>None</Text>
    }

    return (
      <>
        {resolvedTools.validTools.length > 0 && (
          <Text>{resolvedTools.validTools.join(', ')}</Text>
        )}
        {resolvedTools.invalidTools.length > 0 && (
          <Text color="warning">
            {figures.warning} Unrecognized:{' '}
            {resolvedTools.invalidTools.join(', ')}
          </Text>
        )}
      </>
    )
  }

  return (
    <Box
      flexDirection="column"
      gap={1}
      tabIndex={0}
      autoFocus
      onKeyDown={handleKeyDown}
    >
      <Text dimColor>{filePath}</Text>

      <Box flexDirection="column">
        <Text>
          <Text bold>Description</Text> (tells Claude when to use this agent):
        </Text>
        <Box marginLeft={2}>
          <Text>{agent.whenToUse}</Text>
        </Box>
      </Box>

      <Box>
        <Text>
          <Text bold>Tools</Text>:{' '}
        </Text>
        {renderToolsList()}
      </Box>

      <Text>
        <Text bold>Model</Text>: {getAgentModelDisplay(agent.model)}
      </Text>

      {agent.permissionMode && (
        <Text>
          <Text bold>Permission mode</Text>: {agent.permissionMode}
        </Text>
      )}

      {agent.memory && (
        <Text>
          <Text bold>Memory</Text>: {getMemoryScopeDisplay(agent.memory)}
        </Text>
      )}

      {agent.hooks && Object.keys(agent.hooks).length > 0 && (
        <Text>
          <Text bold>Hooks</Text>: {Object.keys(agent.hooks).join(', ')}
        </Text>
      )}

      {agent.skills && agent.skills.length > 0 && (
        <Text>
          <Text bold>Skills</Text>:{' '}
          {agent.skills.length > 10
            ? `${agent.skills.length} skills`
            : agent.skills.join(', ')}
        </Text>
      )}

      {backgroundColor && (
        <Box>
          <Text>
            <Text bold>Color</Text>:{' '}
            <Text backgroundColor={backgroundColor} color="inverseText">
              {' '}
              {agent.agentType}{' '}
            </Text>
          </Text>
        </Box>
      )}

      {!isBuiltInAgent(agent) && (
        <>
          <Box>
            <Text>
              <Text bold>System prompt</Text>:
            </Text>
          </Box>
          <Box marginLeft={2} marginRight={2}>
            <Markdown>{agent.getSystemPrompt()}</Markdown>
          </Box>
        </>
      )}
    </Box>
  )
}