import { z } from 'zod';
import type { ToolDef } from '../tools/types.js';
import { ensureMemoryScaffold, getMemoryRoot } from '../memory/paths.js';
import { writeEntry } from '../memory/store.js';

const ExtractMemoryInput = z.object({
  topic: z.enum(['project', 'user', 'reference']).describe('Memory topic category'),
  title: z.string().min(1).max(200).describe('Entry title (will be normalized to filename)'),
  content: z.string().min(1).describe('Memory content body'),
  tags: z.array(z.string()).optional().describe('Optional tags for search'),
});

type InputT = z.infer<typeof ExtractMemoryInput>;

export const extractMemoryTool: ToolDef<InputT> = {
  name: 'extract_memory',
  description: 'Persist a memory entry to .boocode/memory/ for cross-session recall. Use for project conventions, user preferences, and architectural decisions.',
  inputSchema: ExtractMemoryInput,
  jsonSchema: {
    type: 'function',
    function: {
      name: 'extract_memory',
      description: 'Persist a memory entry for cross-session recall',
      parameters: {
        type: 'object',
        properties: {
          topic: { type: 'string', enum: ['project', 'user', 'reference'] },
          title: { type: 'string', description: 'Entry title' },
          content: { type: 'string', description: 'Memory content' },
          tags: { type: 'array', items: { type: 'string' }, description: 'Search tags' },
        },
        required: ['topic', 'title', 'content'],
      },
    },
  },
  async execute(input: InputT, projectRoot: string): Promise<unknown> {
    const root = getMemoryRoot(projectRoot);
    await ensureMemoryScaffold(root);
    await writeEntry(root, input.topic, input.title, input.content, input.tags ?? []);
    return {
      result: `Memory entry "${input.title}" saved to .boocode/memory/${input.topic}/`,
    };
  },
};