-- Load some default values for our agent.
local r, g, b = love.math.colorFromBytes(132, 193, 238)
love.graphics.setBackgroundColor(r, g, b)
local timer = 0 
local int = math.ceil(timer)

function love.load()
    anim8 = require 'libs/anim8'
    love.graphics.setDefaultFilter("nearest", "nearest")
    checker = 0 
    agent = {}
    agent.vx = 0
    agent.vy = 0 
    agent.x = 0
    agent.y = 0
    agent.speed = 300
    agent.spriteSheet = love.graphics.newImage('sprites/spritesheet3.png')
    agent.grid = anim8.newGrid( 64, 64, agent.spriteSheet:getWidth(), agent.spriteSheet:getHeight() )
    agent.animations = {}
    agent.animations.right = anim8.newAnimation( agent.grid('1-3', 1),0.15)
    agent.animations.left = anim8.newAnimation( agent.grid('1-3', 2),0.15)

    agent.anim = agent.animations.right

    isMouseDown = false
    mouseX, mouseY = 0, 0
end

function love.update(dt)
    timer = timer + dt
    local distance
    local isMoving = false
    if love.keyboard.isDown("right") then
        agent.anim = agent.animations.right
        agent.x = agent.x + 2
        isMoving = true
    end

    if love.keyboard.isDown("left") then
        isMoving = true
        agent.x = agent.x - 2
        agent.anim = agent.animations.left
    end

    agent.anim:update(dt)

    if isMoving == false then
        agent.anim:gotoFrame(1)

    end

    agent.x = agent.x + agent.vx * dt
    agent.y = agent.y + agent.vy * dt

    if love.mouse.isDown(1) then
        isMouseDown = true
        mouseX, mouseY = love.mouse.getPosition()
    else

        if isMouseDown then
            local dx = mouseX - agent.x
            local dy = mouseY - agent.y
            local distance = math.sqrt(dx * dx + dy * dy)
            
            agent.vx = (dx / distance) * agent.speed
            agent.vy = (dy / distance) * agent.speed
        end
        isMouseDown = false
    end


    local damping = 0.98 
    local stopThreshold = 10 
    
    agent.x = agent.x + agent.vx * dt
    agent.y = agent.y + agent.vy * dt
    

    agent.vx = agent.vx * damping
    agent.vy = agent.vy * damping


    if math.abs(agent.vx) < stopThreshold and math.abs(agent.vy) < stopThreshold then
        agent.vx = 0
        agent.vy = 0
    end



end



-- Draw a coloured rectangle.
function love.draw()
    -- In versions prior to 11.0, color component values are (0, 102, 102)
    love.graphics.print(agent.x, 10, 210)
    love.graphics.print(int, 350, 0)
    agent.anim:draw(agent.spriteSheet, agent.x, agent.y, nil, 1)

    if isMouseDown then
        drawDottedArc(agent.x, agent.y, mouseX, mouseY)
    end

end

function drawDottedArc(x1, y1, x2, y2)
    local numDots = 20 
    local distance = math.sqrt((x2 - x1) ^ 2 + (y2 - y1) ^ 2)
    
    for i = 1, numDots do
        local t = i / numDots
        local cx = x1 + (x2 - x1) * t
        local cy = y1 + (y2 - y1) * t
        love.graphics.circle("fill", cx, cy, 2)
    end
end