const functions = require('@google-cloud/functions-framework');

const fs = require('fs');

const path = require('path');

// The file name in your deployment package

const LOCAL_FILE_NAME = 'data.json';

const FILE_PATH = path.join(__dirname, LOCAL_FILE_NAME);

// --- Load JSON once on cold start ---

let data = [];

try {

const jsonString = fs.readFileSync(FILE_PATH, 'utf8');

data = JSON.parse(jsonString);

console.log(`Loaded ${data.length} records from ${LOCAL_FILE_NAME}`);

} catch (err) {

console.error(`CRITICAL ERROR: Failed to load data file: ${err.message}`);

}

// --- Cloud Function entry point ---

functions.http('helloHttp', (req, res) => {

res.set('Content-Type', 'application/json');

const dnis = req.query.dnis || req.body.dnis;

console.log(`Received DNIS: ${dnis}`);

if (!dnis) {

console.warn('No DNIS provided in request.');

return res.json({

fulfillmentResponse: {

messages: [

{ text: { text: ['Missing DNIS in request. Please provide a DNIS value.'] } }

]

}

});

}

// Filter data by DNIS

const filteredData = data.filter(item => item.DNIS === dnis);

if (filteredData.length === 0) {

console.warn(`No match found for DNIS ${dnis}.`);

return res.json({

fulfillmentResponse: {

messages: [

{

text: {

text: [

`No record found for DNIS ${dnis}. Please check the number and try again.`

]

}

}

]

},

sessionInfo: {

parameters: {

dnis_found: false,

requested_dnis: dnis

}

}

});

}

// If match found

const record = filteredData[0];

console.log(`Match found for DNIS ${dnis}:`, record);

res.json({

fulfillmentResponse: {

messages: [

{

text: {

text: [record['Welcome Prompt'] || 'Welcome!']

}

}

]

},

sessionInfo: {

parameters: {

...record,

dnis_found: true

}

}

});

});