/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import type React from 'react';
import { Box, Text } from 'ink';
import { theme } from '../semantic-colors.js';
import { useConfig } from '../contexts/ConfigContext.js';
import { ToolConfirmationMessage } from './messages/ToolConfirmationMessage.js';
import { ToolStatusIndicator, ToolInfo } from './messages/ToolShared.js';
import { useUIState } from '../contexts/UIStateContext.js';
import type { ConfirmingToolState } from '../hooks/useConfirmingTool.js';
import { StickyHeader } from './StickyHeader.js';
import type { SerializableConfirmationDetails } from '@google/gemini-cli-core';
import { useUIActions } from '../contexts/UIActionsContext.js';

function getConfirmationHeader(
  details: SerializableConfirmationDetails | undefined,
): string {
  const headers: Partial<
    Record<SerializableConfirmationDetails['type'], string>
  > = {
    ask_user: 'Answer Questions',
    exit_plan_mode: 'Ready to start implementation?',
  };
  if (!details?.type) {
    return 'Action Required';
  }
  return headers[details.type] ?? 'Action Required';
}

interface ToolConfirmationQueueProps {
  confirmingTool: ConfirmingToolState;
}

export const ToolConfirmationQueue: React.FC<ToolConfirmationQueueProps> = ({
  confirmingTool,
}) => {
  const config = useConfig();
  const { getPreferredEditor } = useUIActions();
  const {
    mainAreaWidth,
    terminalHeight,
    constrainHeight,
    availableTerminalHeight: uiAvailableHeight,
  } = useUIState();
  const { tool, index, total } = confirmingTool;

  // Safety check: ToolConfirmationMessage requires confirmationDetails
  if (!tool.confirmationDetails) return null;

  // Render up to 100% of the available terminal height
  // to maximize space for diffs and other content.
  const maxHeight =
    uiAvailableHeight !== undefined
      ? Math.max(uiAvailableHeight, 4)
      : Math.floor(terminalHeight * 0.5);

  const isRoutine =
    tool.confirmationDetails?.type === 'ask_user' ||
    tool.confirmationDetails?.type === 'exit_plan_mode';
  const borderColor = isRoutine ? theme.status.success : theme.status.warning;
  const hideToolIdentity = isRoutine;

  // ToolConfirmationMessage needs to know the height available for its OWN content.
  // We subtract the lines used by the Queue wrapper:
  // - 2 lines for the rounded border (top/bottom)
  // - 2 lines for the Header (text + margin)
  // - 2 lines for Tool Identity (text + margin) if shown
  const availableContentHeight = constrainHeight
    ? Math.max(maxHeight - (hideToolIdentity ? 4 : 6), 4)
    : undefined;

  const content = (
    <Box flexDirection="column" width={mainAreaWidth} flexShrink={0}>
      <StickyHeader
        width={mainAreaWidth}
        isFirst={true}
        borderColor={borderColor}
        borderDimColor={false}
      >
        <Box flexDirection="column" width={mainAreaWidth - 4}>
          {/* Header */}
          <Box marginBottom={1} justifyContent="space-between">
            <Text color={borderColor} bold>
              {getConfirmationHeader(tool.confirmationDetails)}
            </Text>
            {total > 1 && (
              <Text color={theme.text.secondary}>
                {index} of {total}
              </Text>
            )}
          </Box>

          {!hideToolIdentity && (
            <Box marginBottom={1}>
              <ToolStatusIndicator status={tool.status} name={tool.name} />
              <ToolInfo
                name={tool.name}
                status={tool.status}
                description={tool.description}
                emphasis="high"
              />
            </Box>
          )}
        </Box>
      </StickyHeader>

      <Box
        width={mainAreaWidth}
        borderStyle="round"
        borderColor={borderColor}
        borderTop={false}
        borderBottom={false}
        borderLeft={true}
        borderRight={true}
        paddingX={1}
        flexDirection="column"
      >
        {/* Interactive Area */}
        {/*
          Note: We force isFocused={true} because if this component is rendered,
          it effectively acts as a modal over the shell/composer.
        */}
        <ToolConfirmationMessage
          callId={tool.callId}
          confirmationDetails={tool.confirmationDetails}
          config={config}
          getPreferredEditor={getPreferredEditor}
          terminalWidth={mainAreaWidth - 4} // Adjust for parent border/padding
          availableTerminalHeight={availableContentHeight}
          isFocused={true}
        />
      </Box>
      <Box
        height={1}
        width={mainAreaWidth}
        borderLeft={true}
        borderRight={true}
        borderTop={false}
        borderBottom={true}
        borderColor={borderColor}
        borderStyle="round"
      />
    </Box>
  );

  return content;
};