import {Need} from '../../models/Need';

interface sortAlgo {
    (a: Need, b: Need): number;
}

// sort functions
const sortByName: sortAlgo = (a: Need, b: Need): number => {
    if(a.name.toLocaleLowerCase() < b.name.toLocaleLowerCase()) {
        return -1;
    }
    return 1;
}

const sortByGoal: sortAlgo = (a: Need, b: Need): number => {
    if(a.maxGoal == b.maxGoal) {
        return sortByName(a,b);
    }
    else if(a.maxGoal > b.maxGoal) {
        return -1;
    }
    return 1;
}

const sortByCompletion: sortAlgo = (a: Need, b: Need): number => {
    if(a.current == b.current) {
        return sortByGoal(a,b);
    }
    else if(a.current > b.current) {
        return -1;
    }
    return 1;
}

const sortByPriority: sortAlgo = (a: Need, b: Need): number => {
    if(a.urgent == b.urgent) {
        return sortByGoal(a,b);
    }
    else if(a.urgent && !b.urgent) {
        return -1;
    }
    return 1;
}

const sortByLocation: sortAlgo = (a: Need, b: Need): number => {
    if(a.location.toLocaleLowerCase() < b.location.toLocaleLowerCase()) {
        return -1;
    }
    return 1;
}

export const SortingAlgoArrays: {[key: string]: { func: sortAlgo, display: [string, string]}} = {
    "sortByPriority":   { func: sortByPriority,   display: ["Highest Priority",     "Lowest Priority"       ] },
    "sortByName":       { func: sortByName,       display: ["Name (A to Z)",        "Name (Z to A)"         ] },
    "sortByLocation":   { func: sortByLocation,   display: ["Location (A to Z)",    "Location (Z to A)"     ] },
    "sortByCompletion": { func: sortByCompletion, display: ["Most Completed",       "Least Completed"       ] },
    "sortByGoal":       { func: sortByGoal,       display: ["Largest Maximum Goal", "Smallest Maximum Goal" ] },
};