// @deno-types="npm:@types/express"
import express, { Request, Response } from 'express';
import cors from 'cors';
import {firstPoint, getCollisionPoints, interpolation} from "./physics.ts";
import {changeBasis} from "./math.ts";

const app = express();
const PORT = 3000;

app.use(cors());

app.get('/api/points', (req: Request, res: Response) => {
  const { g, h, l, alpha } = req.query;
  if (g === undefined || h === undefined || l === undefined || alpha === undefined) {
    res.status(401).send("Параметры должны быть заданы");
  }
  res.json(
    getCollisionPoints({ g: Number(g), h: Number(h), l: Number(l), alpha: Number(alpha) })
  );
});

app.get('/api/interpolation', (req: Request, res: Response) => {
  const { g, h, l, alpha, count } = req.query;
  if (g === undefined || h === undefined || l === undefined || alpha === undefined || count === undefined) {
    res.status(401).send("Параметры должны быть заданы");
  }

  const params = { g: Number(g), h: Number(h), l: Number(l), alpha: Number(alpha) };
  const fp = firstPoint(params);

  res.json([...fp, ...changeBasis(interpolation(params), -Number(alpha)).map(p => ({...p, y: p.y - Number(h), time: p.time + fp[fp.length - 1].time}))]);
});

app.listen(PORT, () => {
  console.log(`Сервер запущен на http://localhost:${PORT}`);
});