const assert = require('node:assert/strict');
const http = require('node:http');
const test = require('node:test');
const jwt = require('jsonwebtoken');

const app = require('../app');
const db = require('../src/config/db');

const JWT_SECRET = process.env.JWT_SECRET || 'test-jwt-secret';
process.env.JWT_SECRET = JWT_SECRET;

let originalQuery;

const createToken = (payload = {}) =>
    jwt.sign(
        {
            id: 1,
            dni: '58045340X',
            id_proveedor: 675,
            ...payload
        },
        JWT_SECRET,
        { expiresIn: '1h' }
    );

const withServer = async (callback) =>
    new Promise((resolve, reject) => {
        const server = app.listen(0, '127.0.0.1');

        server.on('error', reject);
        server.on('listening', async () => {
            try {
                const result = await callback(server);
                server.close((closeError) => {
                    if (closeError) {
                        reject(closeError);
                        return;
                    }
                    resolve(result);
                });
            } catch (error) {
                server.close(() => reject(error));
            }
        });
    });

const requestJson = async ({ port, path, authorization }) =>
    new Promise((resolve, reject) => {
        const req = http.request(
            {
                hostname: '127.0.0.1',
                port,
                method: 'GET',
                path,
                headers: authorization ? { authorization } : {}
            },
            (res) => {
                let rawBody = '';

                res.on('data', (chunk) => {
                    rawBody += chunk;
                });

                res.on('end', () => {
                    const body = rawBody ? JSON.parse(rawBody) : null;
                    resolve({ statusCode: res.statusCode, body });
                });
            }
        );

        req.on('error', reject);
        req.end();
    });

test.before(() => {
    originalQuery = db.query;
});

test.after(() => {
    db.query = originalQuery;
});

test('GET /api/trips/active está registrado en /api', () => {
    const apiRouterLayers = app._router.stack.filter(
        (layer) =>
            layer.name === 'router' &&
            layer.regexp &&
            layer.regexp.toString().includes('^\\/api\\/?(?=\\/|$)')
    );

    assert.ok(apiRouterLayers.length > 0, 'Router /api is not mounted');

    const activeRouteLayer = apiRouterLayers
        .flatMap((routerLayer) => routerLayer.handle.stack)
        .find(
            (layer) =>
                layer.route &&
                layer.route.path === '/trips/active' &&
                layer.route.methods.get
        );

    assert.ok(activeRouteLayer, 'GET /api/trips/active route is not defined');
});

test('GET /api/trips/active devuelve viaje activo', async () => {
    const mockedTrip = {
        id_viaje: 123,
        cod_viaje: 'AB-2024-001',
        n_proveedor: 1,
        id_estado: 4,
        estado: 'CARGA DE MERCANCÍA',
        estado_en: 'CARGO LOADING',
        nombrea: 'ORIGEN',
        nombreb: 'DESTINO',
        direcciona: 'Direccion A',
        direccionb: 'Direccion B',
        fecha_salida: '2026-02-06 08:30:00',
        fecha_llegada: '2026-02-06 14:45:00',
        inicio_fin: 'ES-28001/ES-08001',
        matricula: '1234ABC',
        observaciones_mercancia: 'Fragil'
    };

    db.query = async (sql, params) => {
        assert.match(sql, /FROM c_viajes_proveedor p/);
        assert.match(sql, /INNER JOIN t_viaje_estados e/);
        assert.match(sql, /fecha_salida/);
        assert.match(sql, /fecha_llegada/);
        assert.match(sql, /INNER JOIN m_proveedores_trasportistas t/);
        assert.deepEqual(params, ['58045340X', 2, 6]);
        return [[mockedTrip]];
    };

    const response = await withServer(async (server) =>
        requestJson({
            port: server.address().port,
            path: '/api/trips/active',
            authorization: `Bearer ${createToken()}`
        })
    );

    assert.equal(response.statusCode, 200);
    assert.deepEqual(response.body, {
        success: true,
        active_trip: mockedTrip
    });
});

test('GET /api/trips/active devuelve active_trip null cuando no hay', async () => {
    db.query = async () => [[]];

    const response = await withServer(async (server) =>
        requestJson({
            port: server.address().port,
            path: '/api/trips/active',
            authorization: `Bearer ${createToken()}`
        })
    );

    assert.equal(response.statusCode, 200);
    assert.deepEqual(response.body, {
        success: true,
        active_trip: null
    });
});

test('GET /api/trips/active devuelve fechas con hora completa', async () => {
    db.query = async () => [[{
        id_viaje: 123,
        cod_viaje: 'AB-2024-001',
        n_proveedor: 1,
        id_estado: 4,
        estado: 'CARGA DE MERCANCÍA',
        estado_en: 'CARGO LOADING',
        nombrea: 'ORIGEN',
        nombreb: 'DESTINO',
        direcciona: 'Direccion A',
        direccionb: 'Direccion B',
        fecha_salida: '2026-02-06 08:30:00',
        fecha_llegada: '2026-02-06 14:45:00',
        inicio_fin: 'ES-28001/ES-08001',
        matricula: '1234ABC',
        observaciones_mercancia: 'Fragil'
    }]];

    const response = await withServer(async (server) =>
        requestJson({
            port: server.address().port,
            path: '/api/trips/active',
            authorization: `Bearer ${createToken()}`
        })
    );

    assert.equal(response.statusCode, 200);
    assert.match(response.body.active_trip.fecha_salida, /^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/);
    assert.match(response.body.active_trip.fecha_llegada, /^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/);
});

test('GET /api/trips/active devuelve 401 sin token', async () => {
    db.query = async () => {
        throw new Error('db.query should not be called without token');
    };

    const response = await withServer(async (server) =>
        requestJson({
            port: server.address().port,
            path: '/api/trips/active'
        })
    );

    assert.equal(response.statusCode, 401);
});

test('GET /api/trips/active devuelve 500 en error interno', async () => {
    db.query = async () => {
        throw new Error('forced db failure');
    };

    const response = await withServer(async (server) =>
        requestJson({
            port: server.address().port,
            path: '/api/trips/active',
            authorization: `Bearer ${createToken()}`
        })
    );

    assert.equal(response.statusCode, 500);
    assert.deepEqual(response.body, {
        success: false,
        error: 'Internal server error'
    });
});