import { test, beforeEach, afterEach } from 'node:test';
import assert from 'node:assert/strict';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import request from 'supertest';
import { createApp } from '../src/server/app.js';

let tmpDir;
let app;

beforeEach(() => {
  tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'tripplan-stays-'));
  app = createApp({ dbPath: path.join(tmpDir, 'test.db'), sessionSecret: 'test-secret' });
});

afterEach(() => {
  try {
    if (app.locals.db) app.locals.db.close();
  } catch {
    /* ignore */
  }
  fs.rmSync(tmpDir, { recursive: true, force: true });
});

async function createAccount() {
  const agent = request.agent(app);
  const res = await agent.post('/api/auth/account').send({});
  assert.equal(res.status, 201);
  return { agent, user: res.body.user };
}

async function makeTrip(agent) {
  return (await agent.post('/api/trips').send({ name: 'S', start_date: '2026-08-01', end_date: '2026-08-31' })).body.trip;
}

// ---------------------------------------------------------------------------
// end_date validation
// ---------------------------------------------------------------------------

test('end_date: accepted (>= date), rejected (< date), cleared via null', async () => {
  const { agent } = await createAccount();
  const trip = await makeTrip(agent);
  const base = `/api/trips/${trip.id}/entries`;

  const ok = await agent.post(base).send({ date: '2026-08-01', end_date: '2026-08-03', type: 'stay', title: 'Venice' });
  assert.equal(ok.status, 201);
  assert.equal(ok.body.entry.end_date, '2026-08-03');

  const bad = await agent.post(base).send({ date: '2026-08-05', end_date: '2026-08-02', type: 'stay', title: 'X' });
  assert.equal(bad.status, 400);

  const cleared = await agent.patch(`/api/entries/${ok.body.entry.id}`).send({ end_date: null });
  assert.equal(cleared.status, 200);
  assert.equal(cleared.body.entry.end_date, null);
});

test('end_date: PATCHing date past a stored end_date is rejected', async () => {
  const { agent } = await createAccount();
  const trip = await makeTrip(agent);
  const entry = (await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-01', end_date: '2026-08-03', type: 'stay', title: 'Venice',
  })).body.entry;

  // Moving date to 08-10 leaves stored end_date (08-03) < date -> 400.
  const conflict = await agent.patch(`/api/entries/${entry.id}`).send({ date: '2026-08-10' });
  assert.equal(conflict.status, 400);

  // Moving date and end_date together is fine.
  const ok = await agent.patch(`/api/entries/${entry.id}`).send({ date: '2026-08-10', end_date: '2026-08-12' });
  assert.equal(ok.status, 200);
  assert.equal(ok.body.entry.date, '2026-08-10');
  assert.equal(ok.body.entry.end_date, '2026-08-12');
});

test('a >24h flight round-trips end_date', async () => {
  const { agent } = await createAccount();
  const trip = await makeTrip(agent);
  const res = await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-01', end_date: '2026-08-02', type: 'flight', title: 'SYD-LHR',
    start_time: '21:00', end_time: '05:30',
  });
  assert.equal(res.status, 201);
  assert.equal(res.body.entry.date, '2026-08-01');
  assert.equal(res.body.entry.end_date, '2026-08-02');
});

// ---------------------------------------------------------------------------
// Stay type + areas summary
// ---------------------------------------------------------------------------

test('stay entries accepted; summary reports stays count and areas in order', async () => {
  const { agent } = await createAccount();
  const trip = await makeTrip(agent);

  // Venice 3 days (name from location_name), then Berlin 7 days (name from title fallback).
  await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-01', end_date: '2026-08-03', type: 'stay', title: 'Venice stay',
    location_name: 'Venice', sort_order: 0,
  });
  await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-04', end_date: '2026-08-10', type: 'stay', title: 'Berlin', sort_order: 1,
  });
  // A single-day stay (no end_date) -> days 1.
  await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-11', type: 'stay', title: 'Layover', location_name: 'Doha',
  });

  const res = await agent.get(`/api/trips/${trip.id}/route`);
  assert.equal(res.status, 200);
  assert.equal(res.body.summary.stays, 3);
  assert.deepEqual(res.body.summary.areas, [
    { name: 'Venice', days: 3 },
    { name: 'Berlin', days: 7 },
    { name: 'Doha', days: 1 },
  ]);
});

test('stay with location feeds the route as one stop', async () => {
  const { agent } = await createAccount();
  const trip = await makeTrip(agent);
  await agent.post(`/api/trips/${trip.id}/entries`).send({
    date: '2026-08-01', end_date: '2026-08-05', type: 'stay', title: 'Venice',
    location_name: 'Venice', lat: 45.44, lng: 12.32,
  });
  const res = await agent.get(`/api/trips/${trip.id}/route`);
  assert.equal(res.body.stops.length, 1);
  assert.equal(res.body.stops[0].lat, 45.44);
  assert.equal(res.body.summary.stays, 1);
});