const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const test = require('node:test');

const temporaryLogs = fs.mkdtempSync(path.join(os.tmpdir(), 'photobioreactor-'));
process.env.LOGS_DIRECTORY = temporaryLogs;

const { app, HISTORY_FILES } = require('../api/server');

let server;
let baseUrl;

test.before(async () => {
    await new Promise((resolve) => {
        server = app.listen(0, '127.0.0.1', resolve);
    });

    const address = server.address();
    baseUrl = `http://127.0.0.1:${address.port}`;
});

test.after(async () => {
    await new Promise((resolve, reject) => {
        server.close((error) => error ? reject(error) : resolve());
    });
    fs.rmSync(temporaryLogs, { recursive: true, force: true });
});

test('returns simulated history for all sensors', async () => {
    const response = await fetch(`${baseUrl}/api/sensors/all`);
    const data = await response.json();

    assert.equal(response.status, 200);
    assert.equal(data.length, 61);
    assert.ok(data[0].Timestamp);
    assert.ok(data[0].Temperatura_C);
});

test('serves the dashboard in local development mode', async () => {
    const response = await fetch(`${baseUrl}/`);
    const html = await response.text();

    assert.equal(response.status, 200);
    assert.match(html, /Panel del Fotobiorreactor/);
});

test('validates sensor commands', async () => {
    const invalidResponse = await fetch(`${baseUrl}/api/sensors/invalid/command`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ command: 'r' })
    });
    assert.equal(invalidResponse.status, 400);

    const validResponse = await fetch(`${baseUrl}/api/sensors/ph/command`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ command: 'r' })
    });
    const validData = await validResponse.json();

    assert.equal(validResponse.status, 200);
    assert.equal(validData.success, true);
    assert.equal(validData.mode, 'demo');
});

test('rejects undocumented calibration syntax', async () => {
    const response = await fetch(`${baseUrl}/api/sensors/do/command`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ command: 'Cal,atm' })
    });
    const data = await response.json();

    assert.equal(response.status, 400);
    assert.match(data.error, /documentados/);
});

test('validates simulated logging rates', async () => {
    const invalidResponse = await fetch(`${baseUrl}/api/config/logging`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ rate: 3 })
    });
    assert.equal(invalidResponse.status, 400);

    const validResponse = await fetch(`${baseUrl}/api/config/logging`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ rate: 5 })
    });
    const validData = await validResponse.json();

    assert.equal(validResponse.status, 200);
    assert.equal(validData.rate, 5);
    assert.equal(validData.simulated, true);
});

test('clears historical CSV files and preserves headers', async () => {
    for (const name of Object.keys(HISTORY_FILES)) {
        fs.writeFileSync(path.join(temporaryLogs, `${name}.csv`), 'old,data\n1,2\n');
    }

    const response = await fetch(`${baseUrl}/api/history/clear`, {
        method: 'POST'
    });

    assert.equal(response.status, 200);

    for (const [name, header] of Object.entries(HISTORY_FILES)) {
        const content = fs.readFileSync(
            path.join(temporaryLogs, `${name}.csv`),
            'utf8'
        );
        assert.equal(content, header);
    }
});