/**
 * Assemble the MCP server: 14 tools, 2 resources, 3 prompts, on top of an `HfmdClient`.
 * Exported so that it can be embedded (tests use an in-memory transport).
 */
import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import type { CallToolResult, GetPromptResult } from '@modelcontextprotocol/sdk/types.js';
import { HfmdClient, type ClientOptions } from './client.js';
import { PROMPTS } from './prompts.js';
import { RESOURCES } from './resources.js';
import { TOOLS, runTool, type ToolContext } from './tools.js';

export const SERVER_NAME = 'hfmarketdata';
export const SERVER_VERSION = '1.0.0';

export interface ServerOptions extends ClientOptions {
  client?: HfmdClient;
  toolContext?: ToolContext;
}

export function createServer(opts: ServerOptions = {}): { server: McpServer; client: HfmdClient } {
  const client = opts.client ?? new HfmdClient(opts);
  const server = new McpServer(
    { name: SERVER_NAME, version: SERVER_VERSION },
    {
      instructions: [
        'HF Market Data: open high-frequency market data (stocks, ETFs, futures, crypto, indices, FX at 1-minute to daily since ~2007/2010; options chains with Greeks since 2010; SEC fundamentals point-in-time).',
        'Use search_symbols to resolve symbols, get_bars for prices, the futures tools for contracts/curves/continuous series, and the fundamentals tools for statements, ratios, screens and filings.',
        'Outputs are compact tables ({columns, rows}); results above 200 rows are summarised — narrow the range or lower `limit` to see everything.',
        client.keyless
          ? 'Running keyless (low hourly limits: 30 requests/hour per IP). Set HFMD_API_KEY for 120 requests/minute — the API key is free (account at https://www.hfmarketdata.io/signup); higher limits are granted on request by e-mail to contact@spboucher.ai, also free.'
          : 'A free API key is configured (120 requests/minute; higher limits on request by e-mail to contact@spboucher.ai, also free).',
        'Intraday timestamps are naive US/Eastern; daily bars are dates. Missing values are null — never invent data.',
      ].join(' '),
    },
  );

  for (const t of TOOLS) {
    server.registerTool(
      t.name,
      {
        title: t.title,
        description: t.description,
        inputSchema: t.schema,
        annotations: { readOnlyHint: true, destructiveHint: false, idempotentHint: t.name !== 'subscribe_filings', openWorldHint: true },
      },
      async (args: unknown): Promise<CallToolResult> => {
        const { text, isError } = await runTool(t.name, client, args, opts.toolContext);
        return { content: [{ type: 'text', text }], isError: isError || undefined };
      },
    );
  }

  for (const r of RESOURCES) {
    server.registerResource(r.name, r.uri, { title: r.title, description: r.description, mimeType: r.mimeType }, async (uri) => {
      let text: string;
      try {
        text = await r.read(client);
      } catch (e) {
        text = JSON.stringify({ error: e instanceof Error ? e.message : String(e) });
      }
      return { contents: [{ uri: uri.href, mimeType: r.mimeType, text }] };
    });
  }

  for (const p of PROMPTS) {
    server.registerPrompt(p.name, { title: p.title, description: p.description, argsSchema: p.args }, (args: Record<string, unknown>): GetPromptResult => ({
      messages: [{ role: 'user' as const, content: { type: 'text' as const, text: p.build(args as never) } }],
    }));
  }

  return { server, client };
}

export { HfmdClient, HfmdError } from './client.js';
export { TOOLS, TOOL_NAMES, runTool } from './tools.js';
export { RESOURCES } from './resources.js';
export { PROMPTS } from './prompts.js';