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

const { pool } = require('../db');
const productionOrderRouter = require('../routes/productionOrderRoutes');
const analyticsRouter = require('../routes/analyticsRoutes');

const getRouteHandler = (router, method, path) => {
    const route = router.stack.find(layer => layer.route?.path === path && layer.route.methods[method]);
    if (!route) throw new Error(`Route not found: ${method.toUpperCase()} ${path}`);
    return route.route.stack.at(-1).handle;
};

const tinySyncHandler = getRouteHandler(productionOrderRouter, 'post', '/production-orders/tiny-sync');
const productCompositionHandler = getRouteHandler(analyticsRouter, 'get', '/analytics/products/:productId/composition');

const invokeHandler = async (handler, req) => {
    let statusCode = 200;
    let body;
    const res = {
        status(code) {
            statusCode = code;
            return this;
        },
        json(payload) {
            body = payload;
            return this;
        }
    };
    await handler(req, res);
    return { statusCode, body };
};

const compositionPayload = (components = [
    {
        componentTinyId: '919498232',
        componentName: 'ETIQUETA DE TAMANHO GG',
        componentSku: 'ETIQ.T.GG',
        quantityPerUnit: '1',
        totalQuantity: '1',
        unit: 'UN'
    },
    {
        componentTinyId: '976059144',
        componentName: '6118 MALHA CAMISETA 30OE COR CAFE',
        componentSku: 'MC.30.CAF',
        quantityPerUnit: '0.1851',
        totalQuantity: '0.1851',
        unit: 'KG'
    }
]) => ({
    order: {
        tinyId: 'STRUCTURE-V3-976058813',
        number: 'STRUCTURE-V3-BLCS.CAF.GG',
        status: 'completed',
        productSku: 'BLCS.CAF.GG',
        productDescription: 'BASE LISA CAMISETA COR CAFE TAMANHO - GG',
        quantity: '1',
        unit: 'UN',
        notes: 'Composição sincronizada da API pública Olist V3.'
    },
    components,
    steps: []
});

const withFakeDatabase = async (run) => {
    const originalConnect = pool.connect;
    const originalQuery = pool.query;
    const state = {
        nextCompositionId: 1,
        nextOrderId: 1,
        compositions: [],
        compositionComponents: [],
        productionOrders: []
    };

    const query = async (sql, params = []) => {
        const normalizedSql = String(sql).replace(/\s+/g, ' ').trim();

        if (/^(BEGIN|COMMIT|ROLLBACK);?$/.test(normalizedSql)) return { rows: [] };

        if (normalizedSql.startsWith('SELECT id FROM product_compositions WHERE source')) {
            const composition = state.compositions.find(item => item.source === params[0] && item.finished_product_identity === params[1]);
            return { rows: composition ? [{ id: composition.id }] : [] };
        }

        if (normalizedSql.startsWith('INSERT INTO product_compositions')) {
            const composition = {
                id: state.nextCompositionId++,
                source: params[0],
                external_source_id: params[1],
                finished_product_identity: params[2],
                finished_product_sku: params[3],
                finished_product_description: params[4],
                finished_product_unit: params[5],
                finished_tiny_product_id: params[6],
                source_metadata: JSON.parse(params[7]),
                last_synced_at: '2026-07-29T12:00:00.000Z'
            };
            state.compositions.push(composition);
            return { rows: [{ id: composition.id }] };
        }

        if (normalizedSql.startsWith('UPDATE product_compositions')) {
            const composition = state.compositions.find(item => item.id === params[7]);
            composition.external_source_id = params[0];
            composition.finished_product_sku = params[2];
            composition.finished_product_description = params[3];
            composition.finished_product_unit = params[4];
            composition.finished_tiny_product_id = params[5];
            composition.source_metadata = JSON.parse(params[6]);
            return { rows: [] };
        }

        if (normalizedSql.startsWith('DELETE FROM product_composition_components')) {
            state.compositionComponents = state.compositionComponents.filter(item => item.product_composition_id !== params[0]);
            return { rows: [] };
        }

        if (normalizedSql.startsWith('INSERT INTO product_composition_components')) {
            state.compositionComponents.push({
                id: state.compositionComponents.length + 1,
                product_composition_id: params[0],
                component_identity: params[1],
                component_tiny_id: params[2],
                component_sku: params[3],
                component_name: params[4],
                quantity_per_unit: params[5],
                unit: params[6]
            });
            return { rows: [] };
        }

        if (normalizedSql.includes('FROM product_compositions composition')) {
            const composition = state.compositions.find(item => (
                item.source === params[0]
                && (item.finished_tiny_product_id === params[1] || item.finished_product_sku === String(params[1]).toUpperCase())
            ));
            if (!composition) return { rows: [] };
            return {
                rows: [{
                    ...composition,
                    components: state.compositionComponents
                        .filter(item => item.product_composition_id === composition.id)
                        .map(item => ({ ...item, component_product_id: null }))
                }]
            };
        }

        if (normalizedSql.startsWith('SELECT id FROM production_orders')) {
            return { rows: [] };
        }

        if (normalizedSql.startsWith('INSERT INTO production_orders')) {
            const order = {
                id: state.nextOrderId++,
                tiny_id: params[0], number: params[1], status: params[2], order_reference: params[3],
                issue_date: params[4], expected_date: params[5], product_sku: params[6],
                product_description: params[7], quantity: params[8], unit: params[9],
                integration_status: params[10], notes: params[11], supplier: params[12], lot_code: params[13],
                roll_quantity: params[14], fabric_kg: params[15], rib_kg: params[16],
                yield_pieces_per_kg: params[17], created_at: null, updated_at: null
            };
            state.productionOrders.push(order);
            return { rows: [{ id: order.id }] };
        }

        if (normalizedSql.startsWith('DELETE FROM production_order_components') || normalizedSql.startsWith('DELETE FROM production_order_steps')) {
            return { rows: [] };
        }

        if (normalizedSql.includes('FROM production_orders po') && normalizedSql.includes('WHERE po.id = $1')) {
            const order = state.productionOrders.find(item => item.id === params[0]);
            return { rows: order ? [{ ...order, markers: [], components: [], steps: [] }] : [] };
        }

        throw new Error(`Unexpected SQL in test double: ${normalizedSql.slice(0, 100)}`);
    };

    pool.query = query;
    pool.connect = async () => ({ query, release() {} });
    try {
        await run(state);
    } finally {
        pool.connect = originalConnect;
        pool.query = originalQuery;
    }
};

test('Tiny/Olist V3 first import creates a composition without creating an OP', async () => {
    await withFakeDatabase(async (state) => {
        const response = await invokeHandler(tinySyncHandler, { body: compositionPayload() });
        const result = response.body;

        assert.equal(response.statusCode, 201);
        assert.equal(result.componentCount, 2);
        assert.equal(state.compositions.length, 1);
        assert.equal(state.compositionComponents.length, 2);
        assert.equal(state.productionOrders.length, 0);
        assert.equal(result.composition.finishedTinyProductId, '976058813');
    });
});

test('Tiny/Olist V3 re-sync replaces composition components without duplicates', async () => {
    await withFakeDatabase(async (state) => {
        await invokeHandler(tinySyncHandler, { body: compositionPayload() });
        await invokeHandler(tinySyncHandler, { body: compositionPayload([
            {
                componentTinyId: '976059144', componentName: 'MALHA ATUALIZADA', componentSku: 'MC.30.CAF',
                quantityPerUnit: '0.2', totalQuantity: '0.2', unit: 'KG'
            },
            {
                componentTinyId: '976059144', componentName: 'MALHA ATUALIZADA', componentSku: 'MC.30.CAF',
                quantityPerUnit: '0.2', totalQuantity: '0.2', unit: 'KG'
            }
        ]) });

        assert.equal(state.compositions.length, 1);
        assert.equal(state.compositionComponents.length, 1);
        assert.equal(state.compositionComponents[0].quantity_per_unit, 0.2);
        assert.equal(state.productionOrders.length, 0);
    });
});

test('product composition detail lookup returns stored components', async () => {
    await withFakeDatabase(async () => {
        await invokeHandler(tinySyncHandler, { body: compositionPayload() });
        const response = await invokeHandler(productCompositionHandler, { params: { productId: '976058813' } });
        const composition = response.body.composition;

        assert.equal(response.statusCode, 200);
        assert.equal(composition.finishedProductSku, 'BLCS.CAF.GG');
        assert.equal(composition.components.length, 2);
        assert.deepEqual(composition.components[0], {
            id: 1,
            componentTinyId: '919498232',
            componentSku: 'ETIQ.T.GG',
            componentName: 'ETIQUETA DE TAMANHO GG',
            quantityPerUnit: 1,
            unit: 'UN',
            productId: null
        });
    });
});

test('ordinary Tiny production-order payloads continue to create production orders', async () => {
    await withFakeDatabase(async (state) => {
        const response = await invokeHandler(tinySyncHandler, { body: {
            order: {
                tinyId: '12345', number: 'OP-12345', status: 'in_progress', productSku: 'BLCS.CAF.GG',
                productDescription: 'BASE LISA CAMISETA COR CAFE TAMANHO - GG', quantity: '10', unit: 'UN'
            },
            components: [],
            steps: []
        } });
        const result = response.body;

        assert.equal(response.statusCode, 201);
        assert.equal(state.compositions.length, 0);
        assert.equal(state.productionOrders.length, 1);
        assert.equal(result.order.tinyId, '12345');
        assert.equal(result.order.number, 'OP-12345');
    });
});