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 temporaryRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'photobioreactor-'));
const temporaryLogs = path.join(temporaryRoot, 'logs');
const temporaryData = path.join(temporaryRoot, 'data');
const temporaryRuntime = path.join(temporaryRoot, 'runtime.json');
fs.mkdirSync(temporaryLogs, { recursive: true });
fs.mkdirSync(temporaryData, { recursive: true });
process.env.LOGS_DIRECTORY = temporaryLogs;
process.env.DATA_DIRECTORY = temporaryData;
process.env.RUNTIME_CONFIG_FILE = temporaryRuntime;
process.env.EZO_MODE = 'demo';

const { app, HISTORY_FILES } = require('../api/server');
const { collectReadings, publishReading } = require('../api/acquisition-service');

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(temporaryRoot, { recursive: true, force: true });
});

test('returns real CSV history for all sensors', async () => {
    fs.writeFileSync(
        path.join(temporaryLogs, 'temperature.csv'),
        'timestamp,value\n2026-06-22T12:00:00.000Z,25.1\n'
    );
    fs.writeFileSync(
        path.join(temporaryLogs, 'ph.csv'),
        'timestamp,value\n2026-06-22T12:00:00.000Z,7.2\n'
    );
    fs.writeFileSync(path.join(temporaryLogs, 'do.csv'), 'timestamp,value\n');
    fs.writeFileSync(path.join(temporaryLogs, 'ec.csv'), 'timestamp,value\n');

    const response = await fetch(`${baseUrl}/api/sensors/all`);
    const data = await response.json();

    assert.equal(response.status, 200);
    assert.equal(data.length, 2);
    assert.ok(data[0].Timestamp);
    assert.ok(data[0].Sensor);
    assert.equal(typeof data[0].Valor, 'number');
});

test('all history export respects enabled sensors', async () => {
    fs.writeFileSync(
        path.join(temporaryLogs, 'temperature.csv'),
        'timestamp,value\n2026-06-22T12:00:00.000Z,25.1\n'
    );
    fs.writeFileSync(
        path.join(temporaryLogs, 'ph.csv'),
        'timestamp,value\n2026-06-22T12:00:00.000Z,7.2\n'
    );
    fs.writeFileSync(path.join(temporaryLogs, 'do.csv'), 'timestamp,value\n');
    fs.writeFileSync(path.join(temporaryLogs, 'ec.csv'), 'timestamp,value\n');

    await fetch(`${baseUrl}/api/config/runtime`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            rate: 1,
            enabledSensors: ['temperature']
        })
    });

    const response = await fetch(`${baseUrl}/api/sensors/all`);
    const data = await response.json();

    assert.equal(response.status, 200);
    assert.equal(data.length, 1);
    assert.equal(data[0].Sensor, 'RTD');
});

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('persists logging rates used by acquisition', 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);

    const readResponse = await fetch(`${baseUrl}/api/config/logging`);
    const readData = await readResponse.json();
    assert.equal(readData.rate, 5);
    assert.equal(JSON.parse(fs.readFileSync(temporaryRuntime)).loggingRateSeconds, 5);
});

test('persists enabled sensors used by acquisition', async () => {
    const response = await fetch(`${baseUrl}/api/config/runtime`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            rate: 1,
            enabledSensors: ['temperature']
        })
    });
    const data = await response.json();

    assert.equal(response.status, 200);
    assert.deepEqual(data.enabledSensors, ['temperature']);

    const readResponse = await fetch(`${baseUrl}/api/config/runtime`);
    const readData = await readResponse.json();
    assert.deepEqual(readData.enabledSensors, ['temperature']);
});

test('rejects empty enabled sensor configuration', async () => {
    const response = await fetch(`${baseUrl}/api/config/runtime`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            rate: 1,
            enabledSensors: []
        })
    });

    assert.equal(response.status, 400);
});

test('demo acquisition writes live JSON and CSV files', async () => {
    await fetch(`${baseUrl}/api/config/runtime`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            rate: 1,
            enabledSensors: ['temperature', 'ph', 'do', 'ec']
        })
    });
    const result = await collectReadings();

    assert.equal(result.mode, 'demo');
    for (const file of ['EZORTD.json', 'EZOPH.json', 'EZODO.json', 'EZOEC.json']) {
        const data = JSON.parse(fs.readFileSync(path.join(temporaryData, file)));
        assert.equal(data.online, true);
        assert.ok(data.timestamp);
    }
    for (const file of ['temperature.csv', 'ph.csv', 'do.csv', 'ec.csv']) {
        assert.match(
            fs.readFileSync(path.join(temporaryLogs, file), 'utf8'),
            /^timestamp,value/m
        );
    }
});

test('disabled sensors are published as disabled without CSV rows', async () => {
    await fetch(`${baseUrl}/api/config/runtime`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            rate: 1,
            enabledSensors: ['temperature']
        })
    });
    fs.rmSync(path.join(temporaryLogs, 'ph.csv'), { force: true });

    const result = await collectReadings();
    const phData = JSON.parse(fs.readFileSync(path.join(temporaryData, 'EZOPH.json')));

    assert.equal(result.results.find((item) => item.sensorId === 'ph').disabled, true);
    assert.equal(phData.disabled, true);
    assert.equal(fs.existsSync(path.join(temporaryLogs, 'ph.csv')), false);
});

test('hardware null readings are marked offline and not appended as zero', async () => {
    const timestamp = new Date().toISOString();
    const csvPath = path.join(temporaryLogs, 'ph.csv');
    fs.rmSync(csvPath, { force: true });

    const online = await publishReading('ph', null, timestamp, 'hardware');
    const data = JSON.parse(fs.readFileSync(path.join(temporaryData, 'EZOPH.json')));

    assert.equal(online, false);
    assert.equal(data.online, false);
    assert.equal(data.error, 'Lectura no disponible');
    assert.equal(fs.existsSync(csvPath), false);
});

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);
    }
});