var perks = ["medic", "support", "sharpshooter", "commando", "berserker", "firebug"];

var vanillaWeapons = [
    {name: "Broken Pipe",     weight: 3,  price: 133,  category: "Melee"},
    {name: "Fire Axe",        weight: 5,  price: 200,  category: "Melee"},
    {name: "Chainsaw",        weight: 8,  price: 666,  category: "Melee"},
    {name: "Drawf Axe",       weight: 6,  price: 1337, category: "Melee"},

    {name: "Handcannon",      weight: 5,  price: 266,  category: "Power"},
    {name: "Shotgun",         weight: 8,  price: 400,  category: "Power"},
    {name: "A Landmine",      weight: 10, price: 560,  category: "Power"},
    {name: "Hunting Shotgun", weight: 10, price: 600,  category: "Power"},
    {name: "LAW",             weight: 15, price: 800,  category: "Power"},

    {name: "Dual 9mms",       weight: 4,  price: 200,  category: "Speed"},
    {name: "Bullpup",         weight: 6,  price: 400,  category: "Speed"},
    {name: "FlameThrower",    weight: 10, price: 533,  category: "Speed"},
    {name: "Machine Pistol",  weight: 4,  price: 533,  category: "Speed"},

    {name: "Winchester",      weight: 6,  price: 400,  category: "Range"},
    {name: "Crossbow",        weight: 10, price: 533,  category: "Range"},
]

var KFSWeapons = [
    {name: "Hammer",          weight: 1,  price: 133,  category: "Melee"},
    {name: "Sword",           weight: 5,  price: 533,  category: "Melee"},

    {name: "Taurus Revolver", weight: 5,  price: 400,  category: "Power"},
    {name: "Blunderbuss",     weight: 10, price: 560,  category: "Power"},
    {name: "A Landmine",      weight: 10, price: 560,  category: "Power"},
    {name: "RPG-7",           weight: 15, price: 800,  category: "Power"},
    {name: "M202A1",          weight: 16, price: 1200, category: "Power"},
    {name: "Ultimax 100 MK2", weight: 8,  price: 1733, category: "Power"},

    {name: "Dual Glock 17s",  weight: 4,  price: 200,  category: "Speed"},
    {name: "BD3008",          weight: 6,  price: 400,  category: "Speed"},
    {name: "Molotov",         weight: 6,  price: 400,  category: "Speed"},
    {name: "MAC M10",         weight: 3,  price: 600,  category: "Speed"},
    {name: "MP5A",            weight: 6,  price: 653,  category: "Speed"},
    {name: "Dual MAC M10s",   weight: 4,  price: 1200, category: "Speed"},

    {name: "Winchester 1873", weight: 6,  price: 400,  category: "Range"},
    {name: "Pepper Spray",    weight: 1,  price: 400,  category: "Range"},
    {name: "MSG-90",          weight: 6,  price: 1266, category: "Range"},
]

function areDistinct(arr) {
    let n = arr.length;
    let s = new Set();
    for (let i = 0; i < n; i++) {
        s.add(arr[i]);
    }
    return (s.size == n);
}

function getSupportLvlLimit() {
    return 25; // i wanted to implement support for support lv1 and lv2 but idk what the max weight for those levels are
}

function getRandomElement(array) {
    return array[Math.floor(Math.random() * array.length)];
}

function getRandomWeapons(weaponset, howmany, perk) {
    var weightmax = (perk == "support" ? getSupportLvlLimit() : 16);
    var chosenweapons = [];
    var totalweight = 0;
    var totalprice = 0;
    var i = 0;
    do {
	i = i + 1;
        chosenweapons = [];
        totalweight = 0;
        for (let i = 0; i < howmany; i++) { chosenweapons.push(getRandomElement(weaponset)) };
        chosenweapons.forEach(e => { totalweight += e.weight });
        if (i < 75000) {
            totalling = !(areDistinct(chosenweapons) && totalweight < weightmax);
        } else {
            totalling = false;
            return {};
        }
    } while (totalling);
    chosenweapons.forEach(e => { totalprice += e.price });
    return {chosenweapons, totalweight, totalprice};
}

// webui functions
window.onload = function() {///////////////////////////////////////////
var selperk = document.getElementById("perk");
var selset = document.getElementById("set");
var selnum = document.getElementById("numofweapons");

document.getElementById("rollperk").addEventListener("click", () => {
    document.getElementById("perk").value = getRandomElement(perks);
    changePerkAndOrSetFunction();
});

function changePerkAndOrSetFunction() {
    if (selperk.value == "support") {
        if (selset.value == "kfs") selnum.max = 7;
        else selnum.max = 5;
    } else {
        if (selset.value == "kfs") selnum.max = 5;
        else selnum.max = 3;
    }
    if (selnum.value > selnum.max) selnum.value = selnum.max;
}

selperk.addEventListener("change", changePerkAndOrSetFunction);
selset.addEventListener("change", changePerkAndOrSetFunction);

document.getElementById("random").addEventListener("click", () => {
    document.querySelectorAll(".row").forEach(e=>{e.remove()});
    var set = (selset.value == "kfs" ? KFSWeapons : vanillaWeapons)
    if (selnum.value == 0) selnum.value = 2;
    var randomWeapon = getRandomWeapons(set, selnum.value, selperk.value)
    if (Object.keys(randomWeapon) != 0) {
    document.getElementById("tbody").insertAdjacentHTML('afterend',
    `<tr class="row"><th colspan="4">Total price: ${randomWeapon.totalprice} | Total weight: ${randomWeapon.totalweight}</td></tr>`);
    randomWeapon.chosenweapons.forEach(e=>{
        document.getElementById("tbody").insertAdjacentHTML('beforeend', `<tr class="row">
      <td>${e.name}</td>
      <td>${e.price}</td>
      <td>${e.weight}</td>
      <td>${e.category}</td>
    </tr>`);
    })
    } else { alert("shit failed, hit the button again") }
})

}//////////////////////////////////////////////////////////////////////