// Resource nodes: each node has a finite amount stored in a building variable.

fn harvest(ctx, tool, resource, item, skill, verb) {
    if !ctx.has_item(tool, 1) {
        ctx.message(`You need a ${tool} to ${verb} the ${ctx.target_name()}.`);
        return false;
    }
    let left = ctx.get_var(resource);
    // Higher skill levels sometimes yield a bonus.
    let amount = 1;
    if ctx.random(10) < ctx.skill_level(skill) {
        amount = 2;
    }
    ctx.give_item(item, amount);
    ctx.add_xp(skill, 10);
    ctx.set_var(resource, left - 1);
    if left - 1 <= 0 {
        ctx.destroy_target();
        ctx.message(`The ${ctx.target_name()} is depleted.`);
    } else {
        ctx.message(`You ${verb} the ${ctx.target_name()} and get ${amount} ${item}.`);
    }
}

pub fn chop(ctx) {
    harvest(ctx, "axe", "wood", "log", "woodcutting", "chop")
}

pub fn mine(ctx) {
    harvest(ctx, "pickaxe", "ore", "iron_ore", "mining", "mine")
}