local time = 0
local bullets = {}
local targetTable = {} -- table of target projectiles
local newestTarget = 0 -- what's the newest spawned target?
local numT = 0
Encounter.SetVar("wavetimer",5.0)
Arena.Resize(300,300)
function Update()
    time = time + 1
    if time <= 105 then
        if time%15 == 0 then
            local t = CreateProjectile('Target', Player.x + math.random(35,-35), Player.y + math.random(35,-35))
            numT = numT + 1
            if newestTarget == 0 then
                newestTarget = newestTarget + 1 -- increment newestTarget so we know what to remove
            else
                newestTarget = newestTarget + 4 -- increment newestTarget so we know what to remove
            end
            table.insert(targetTable, t) -- insert target to table, so we can delete it later
            t.SetVar('tNum', numT)
            Audio.PlaySound("targetsound")
            --DEBUG("Created some bullets")
            --DEBUG("newestTarget = " .. newestTarget)
            end
    else
        for _,t in ipairs(targetTable) do
            function CheckNumberx(bulletnum) -- this function will take your bullet's target number, and try to pair it up with its target.
                local target = nil
                for t,v in pairs (targetTable) do
                    target = targetTable[t]
                end
                if target ~= nil then
                    DEBUG("Target's X Is:"..tostring(target.x)) -- tells you where your target is. if this fails, let me know.
                    return target.x
                end
            end
            function CheckNumbery(bulletnum)-- same here, just swapped coordinates.
                local target = nil
                for t,v in pairs (targetTable) do
                    target = targetTable[t]
                end
                if target ~= nil then
                    DEBUG("Target's Y Is:"..tostring(target.y))
                    return target.y
                end
            end
            for k=1,2 do
                for l=1,2 do
                    b = CreateProjectile('SeekerBullet', Arena.width*(2*k-3), Arena.height*(2*l-3))
                    table.insert(bullets, b)
                    b.SetVar('TX', CheckNumberx(b.GetVar('bulletnum'))) -- both of these are going to use the functions above to get the specified target. (based off of the number)
                    b.SetVar('TY', CheckNumbery(b.GetVar('bulletnum')))
                    b.SetVar('pastx', TX)
                    b.SetVar('pasty', TY)
                    b.SetVar('bpastx', b.x)
                    b.SetVar('bpasty', b.y)
                    b.SetVar('xspeed', 0)
                    b.SetVar('yspeed', 0)
                end
            end
        end
    end
    --for _,b in ipairs(bullets) do -- not sure WHAT the hell this is doing, so it's gone
    --    if b.isactive then
    --        DEBUG("There are "..#bullets.." bullets")
    --        local pastx = b.GetVar('pastx')
    --        local pasty = b.GetVar('pasty')
    --        local bpastx = b.GetVar('bpastx')
    --        local bpasty = b.GetVar('bpasty')
    --        local dx = pastx - bpastx
    --        local dy = pasty - bpasty
    --        local xspeed = b.GetVar('xspeed') / 2 + dx / 75
    --        local yspeed = b.GetVar('yspeed') / 2 + dy / 75
    --        b.Move(xspeed, yspeed)
    --        b.SetVar('xspeed', xspeed)
    --        b.SetVar('yspeed', yspeed)
    --        if b.x >= pastx - 8 and b.x <= pastx + 8 then
    --            if b.y >= pasty - 8 and b.x <= pasty + 8 then
    --                b.Remove()
    --            end
    --        end
    --    end
    --end


    for i = 1, #bullets do
        local bullet = bullets[i] -- get the current bullet we're manipulating
        local pastx = b.GetVar('pastx') -- get the target's X
        local pasty = b.GetVar('pasty') -- get the target's Y
        local bpastx = b.GetVar('bpastx') -- get the bullet's original X
        local bpasty = b.GetVar('bpasty') -- get the bullet's original Y
        local dx = pastx - bpastx   -- calculate difference
        local dy = pasty - bpasty   -- ^
        local xspeed = bullet.GetVar('xspeed') / 2 + dx / 50 -- get the x speed
        local yspeed = bullet.GetVar('yspeed') / 2 + dy / 50 -- get the y speed

        if bullet.isactive then -- is this bullet even active?
            bullet.Move(xspeed, yspeed) -- move the bullet
            bullet.SetVar('xspeed', xspeed) -- new X speed
            bullet.SetVar('yspeed', yspeed) -- new Y speed
            if distanceGeneric(pastx, bullet.x, pasty, bullet.y) < 7 then -- are we closer than 5 pixels to the center?
                bullet.Remove() -- if so, delete bullet
                if targetTable[newestTarget].isactive then -- here we are assuming that there will never be more than one target on the screen
                    targetTable[newestTarget].Remove()     -- at the same time, so we remove the latest target once any bullet 'collides' with its center
                end
            end
        else -- we've already deleted the bullet?
            -- don't do anything to it
        end
    end
end

function distanceToSpr(spr1, spr2) -- sprite 1, sprite 2; returns distance between two sprites/objects/the player given x and y positions
    local distance = (math.sqrt(math.pow(spr2.x - spr1.x, 2) + math.pow(spr2.y - spr1.y, 2))) -- actually unused but useful anyway
    return distance
end

function distanceGeneric(no1, no2, no1b, no2b) -- x1, x2, y1, y2; returns distance between two objects given x and y positions
    local distance = (math.sqrt(math.pow(no2 - no1, 2) + math.pow(no2b - no1b, 2)))
    return distance
end

function OnHit(bullet)
    local atk = GetGlobal("atk")
    if bullet.GetVar('xspeed') ~= nil then -- bullet?
        Player.Hurt(atk)
    end -- must be target, so do nothing
end