import { Application, Router } from 'https://deno.land/x/oak/mod.ts';
import { Client } from "https://deno.land/x/postgres@v0.17.0/mod.ts";

const app = new Application();
const router = new Router();

//---------dotenv info-------------
import { load } from "https://deno.land/std/dotenv/mod.ts";

const env = await load();
const hostname = env["HOSTNAME"];
const port     = env["PORT"];
const user     = env["USER"];
const password = env["PASSWORD"];
const database = env["DATABASE"];
const app_port = env["APP_PORT"];


// Configure database connection
const client = new Client({
  hostname:hostname 
  ,port:    port     
  ,user:    user     
  ,password:password 
  ,database:database 
  ,applicationName: "pricing guidance"
});

await client.connect();

// Load SQL from file
const query = await Deno.readTextFile("sql/get.pg.sql");

function apply_guidance(doc: any) {
    
    if (doc["hist"]["chan.mold.v0ds.vers"] && Array.isArray(doc["hist"]["chan.mold.v0ds.vers"])) {
        // Loop through each element in the 'chan.mold.v0ds.vers' array
        for (const element of doc["hist"]["chan.mold.v0ds.vers"]) {
          // Process each element - 'element' is of type SeasonData
          console.log(element); // Replace with actual processing logic
        }
    } else {
        // Handle the case where 'chan.mold.v0ds.vers' is not an array or doesn't exist
        console.error("'chan.mold.v0ds.vers' is not an array or does not exist in the document.");
    }

    return doc;
}

// Define a route to retrieve values from the database using parameters
router.get('/code_price/:billcode/:shipcode/:partcode/:qty', async (ctx) => {

    const partcode = ctx.params.partcode;
    const billcode = ctx.params.billcode;
    const shipcode = ctx.params.shipcode;
    const qty = ctx.params.qty;

    //console.log(partcode)
    //console.log(customer)
    const result = await client.queryObject({args: [billcode, shipcode, partcode, qty], text: query} );
    const procd = apply_guidance(result.rows[0]["doc"])
    ctx.response.body = procd
});

app.use(router.routes());
app.use(router.allowedMethods());

// Start the server
console.log('Server is running on http://usmidsap02:8090');
await app.listen({ port: 8090 });