import React, { useEffect } from 'react';
import { StyleSheet, Text, View, TextInput, FlatList, SafeAreaView  } from 'react-native';
import { ScrollView } from 'react-native-gesture-handler';
import { sqlite_exec_query } from '../db/query';
import DepenseListEntry from './depense_list_entry';

function DepensesList(props)
{
    const [depenses, onGetDepenses] = React.useState([]);
    const [depensesFetched, preventFetchDepenses] = React.useState(false)
    let fetchDepenses = props.fetchDepenses || !depensesFetched
    useEffect( () => {
        sqlite_exec_query(`create table if not exists expense (id integer primary key not null, value real, description text, date integer);`,(res)=>{
            if(fetchDepenses)
                sqlite_exec_query("select * from expense order by date desc", (res) => {
                    onGetDepenses(res.rows._array);
                    preventFetchDepenses(true);
                    props.depensesFetched();
                });
        });
        
    });

    let content = []


    if(depenses.length > 0)
    {
        // get latest and oldest depense
        let latest_depense = depenses[0];
        let oldest_depense = depenses[depenses.length - 1]
        let curDate = new Date(latest_depense.date);
        let oldestDate = new Date(oldest_depense.date);
    }
        depenses
            .forEach( function(depense){
            // console.log(depense.date)
            content.push(
                <DepenseListEntry fetchDepenses={() => preventFetchDepenses(false)} key={"depense_list_depense"+depense.id} depense={depense}/>
            )
        });
    

    return(
    <SafeAreaView>
        <ScrollView>
            {content}
        </ScrollView>
    </SafeAreaView >
    )
}

const depense_list_style = StyleSheet.create({
    list_container: {
        flex: 1
    }
  });

export default DepensesList