import type { FastifyInstance, FastifyReply, FastifyRequest } from 'fastify';
import { MarketCallRepository } from '../../domains/shared';
import { CalendarService } from './CalendarService';
import { ScreenerEngine } from '../screener';
import type { SnapshotEntry } from '../../domains/shared';
import { callSchema } from '../../domains/shared/types/schemas';

export class CallsController {
  constructor(
    private readonly repo: MarketCallRepository,
    private readonly engine: ScreenerEngine,
    private readonly calendar: CalendarService,
  ) {}

  private static toSnapshot(r: any): SnapshotEntry | null {
    if (!r) return null;
    const m = r.asset?.displayMetrics ?? r.asset?.getDisplayMetrics?.() ?? {};
    return {
      price: r.asset?.currentPrice ?? null,
      signal: r.signal ?? null,
      inflatedVerdict: r.inflated?.label ?? null,
      fundamentalVerdict: r.fundamental?.label ?? null,
      pe: m['P/E'] ?? null,
      roe: m['ROE%'] ?? null,
      fcf: m['FCF Yld%'] ?? null,
    };
  }

  register(app: FastifyInstance): void {
    app.get('/api/calls', this.list.bind(this));
    app.get('/api/calls/calendar', this.handleCalendar.bind(this));
    app.get('/api/calls/:id', this.get.bind(this));
    app.post('/api/calls', { schema: callSchema }, this.create.bind(this));
    app.delete('/api/calls/:id', this.remove.bind(this));
  }

  private async list() {
    return { calls: this.repo.list() };
  }

  private async get(req: FastifyRequest, reply: FastifyReply) {
    const call = this.repo.get((req.params as { id: string }).id);
    if (!call) return reply.code(404).send({ error: 'Call not found' });

    const current: Record<string, SnapshotEntry | null> = {};
    if (call.tickers.length > 0) {
      try {
        const results = await this.engine.screenTickers(call.tickers);
        for (const r of [...results.STOCK, ...results.ETF, ...results.BOND]) {
          current[r.asset.ticker] = CallsController.toSnapshot(r);
        }
      } catch {
        /* non-fatal */
      }
    }
    return { ...call, current };
  }

  private async create(req: FastifyRequest, reply: FastifyReply) {
    const { title, quarter, date, thesis, tickers } = req.body as {
      title: string;
      quarter: string;
      date?: string;
      thesis: string;
      tickers: string[];
    };
    const upperTickers = tickers.map((t) => t.toUpperCase());

    const snapshot: Record<string, SnapshotEntry | null> = {};
    try {
      const results = await this.engine.screenTickers(upperTickers);
      for (const r of [...results.STOCK, ...results.ETF, ...results.BOND]) {
        snapshot[r.asset.ticker] = CallsController.toSnapshot(r);
      }
    } catch (err) {
      req.log.warn(`Could not snapshot prices for market call: ${(err as Error).message}`);
    }

    const call = this.repo.create({
      title,
      quarter,
      date,
      thesis,
      tickers: upperTickers,
      snapshot: snapshot as any,
    });
    return reply.code(201).send(call);
  }

  private async remove(req: FastifyRequest, reply: FastifyReply) {
    const deleted = this.repo.delete((req.params as { id: string }).id);
    if (!deleted) return reply.code(404).send({ error: 'Call not found' });
    return { ok: true };
  }

  private async handleCalendar(req: FastifyRequest) {
    let tickers: string[];
    if ((req.query as any).tickers) {
      tickers = String((req.query as any).tickers)
        .split(',')
        .map((t) => t.trim().toUpperCase())
        .filter(Boolean);
    } else {
      tickers = [...new Set(this.repo.list().flatMap((c) => c.tickers))];
    }

    return this.calendar.getEvents(tickers);
  }
}