const { getShoppingItems, addShoppingItem, getRecentFinds } = require("../arangodb");
const { verifyToken } = require("../checkToken");
const { addHupTask } = require("../huphandler");
const { addRouteToScope } = require("../scopes");
const {writeFile, readFile, existsSync, unlink} = require("fs")
const route = require("./files");
addRouteToScope("/shopping/list", "shopping")
addRouteToScope("/shopping/item", "shopping")
const shoppingList = [];
if(existsSync("./.shopping")){
    readFile("./.shopping", (err, data)=>{
        if(!err){
            shoppingList.splice(0, 0, ...JSON.parse(data.toString()))
            unlink("./.shopping", (err)=>{
                console.log(err)
            })
        }
    })
}
route.post("/list", verifyToken, (req, res)=>{
    shoppingList.splice(0, shoppingList.length, ...req.body)
    getShoppingItems(req.query.limit||25, shoppingList).then((frequentlyUsed)=>{
        res.json(frequentlyUsed)
    }, (error)=>{
        res.status(500).json(error)
    })
})
route.get("/list", verifyToken, (req, res)=>{
    getShoppingItems((req.query.limit||25), shoppingList).then((frequentlyUsed)=>{
        getRecentFinds().then((recentFinds)=>{
        res.json({shoppingList, frequentlyUsed, recentFinds})
        }, (error)=>{
            res.status(500).json(error)
        })
    }, (error)=>{
        res.status(500).json(error)
    })
})
route.post("/item", verifyToken, (req, res)=>{
    shoppingList.splice(shoppingList.findIndex(({item})=>item==req.body.item), 1)
    if(req.body.ok){
        addShoppingItem(req.body.item, req.body.quantity, req.body.quantityType).then(()=>{
            res.end()
        }, (error)=>{
            console.log(error)
            res.status(500).json("database query error")
        })
    }else{
        res.end()
    }
})
addHupTask("shoppinglist", ()=>new Promise((res)=>{
    writeFile("./.shopping", JSON.stringify(shoppingList), (err)=>{
        if(err){
            res(err)
        }else{
            res()
        }
    })
}))
module.exports = route