---@diagnostic disable: undefined-global

backgrounds = require("assets.backgrounds.backgrounds-data")

groundTiles = {
    { x = 250, y = HEIGHT - 300, width = 200, height = 30 },
    { x = WIDTH - 250 - 200, y = HEIGHT - 300, width = 200, height = 30 },
}


function SafeInitCharacter(character, default_x, default_y)
    character.x = character.x or default_x
    character.y = character.y or default_y
    character.y_velocity = character.y_velocity or 1
    character.current_sprite = character.asset_dir .. "/sprites/idle.png"
    character.can_jump = false
    character.knockback_counter = 0
    character.combo_chain = 0
    character.can_apply_knockback = false
end

function Setup()
    local bgIndex = math.random(1, #backgrounds)
    setBgImage(backgrounds[bgIndex])
    SafeInitCharacter(player1Character, 250, 150)
    SafeInitCharacter(player2Character, WIDTH - 250 - (250 / 2), 150)
end

gravity = 1.2 -- POSITIVE gravity

function DrawGroundTiles()
    for _, tile in ipairs(groundTiles) do
        queueRectForRender(tile.x, tile.y, tile.width, tile.height, 100, 100, 100, 255) -- gray boxes
    end
end

function IsOnGround(character)
    for _, tile in ipairs(groundTiles) do
        local characterFeetY = character.y + 128

        local isWithinX = character.x + 64 > tile.x and character.x < tile.x + tile.width
        local isTouchingY = characterFeetY >= tile.y and characterFeetY <= tile.y + tile.height

        if isWithinX and isTouchingY then
            character.y = tile.y - 128
            return true
        end
    end
    return false
end

function HandleP1Input()
    if Input.isKeyPressedOnce("W") and player1Character.can_jump then
       player1Character.y_velocity = player1Character.jump_strength * -1.0
       player1Character.can_jump = false
    end
    if Input.isKeyDown("D") then
        player1Character.x = player1Character.x + player1Character.speed
    end
    if Input.isKeyDown("A") then
        player1Character.x = player1Character.x - player1Character.speed
    end
    if Input.isKeyPressedOnce("F") then
        
    end
end

function HandleP2Input()
    if Input.isKeyPressedOnce("UP") and player2Character.can_jump then
        player2Character.y_velocity = player2Character.jump_strength * -1.0
        player2Character.can_jump = false
    end
    if Input.isKeyDown("RIGHT") then
        player2Character.x = player2Character.x + player2Character.speed
    end
    if Input.isKeyDown("LEFT") then
        player2Character.x = player2Character.x - player2Character.speed
    end
end

function Update()
    -- P1 physics
    player1Character.y_velocity = player1Character.y_velocity + gravity
    player1Character.y = player1Character.y + player1Character.y_velocity

    if IsOnGround(player1Character) then
        player1Character.y_velocity = 0
        player1Character.can_jump = true
    end

    -- P2 physics
    player2Character.y_velocity = player2Character.y_velocity + gravity
    player2Character.y = player2Character.y + player2Character.y_velocity

    if IsOnGround(player2Character) then
        player2Character.y_velocity = 0
        player2Character.can_jump = true
    end

    -- Render
    queueTextureForRender(
        player1Character.current_sprite,
        math.floor(player1Character.x),
        math.floor(player1Character.y)
    )

    queueTextureForRender(
        player2Character.current_sprite,
        math.floor(player2Character.x),
        math.floor(player2Character.y)
    )

    local fontFile = "assets/fonts/OpenSans-Bold.ttf"
    local fontSize = 24
    local text = player1Character.name

    local x = 20
    local y = 20

    queueTextForRender(text, fontFile, x, y, fontSize, 0, 0, 0, 255)

    local text = player2Character.name

    local textWidth = getTextWidth(fontFile, fontSize, text)
    local x = WIDTH - textWidth - 20
    local y = 20

    queueTextForRender(text, fontFile, x, y, fontSize, 0, 0, 0, 255)

    local fontFile = "assets/fonts/OpenSans-MediumItalic.ttf"
    local fontSize = 34
    local text = tonumber(player1Character.knockback_counter)

    local x = 40
    local y = 40

    queueTextForRender(text, fontFile, x, y, fontSize, 0, 0, 0, 255)

    local fontFile = "assets/fonts/OpenSans-MediumItalic.ttf"
    local fontSize = 34
    local text = tostring(player2Character.knockback_counter)

    local textWidth = getTextWidth(fontFile, fontSize, text)
    local x = WIDTH - textWidth - 40

    queueTextForRender(text, fontFile, x, y, fontSize, 0, 0, 0, 255)

    DrawGroundTiles()

    -- Input
    HandleP1Input()
    HandleP2Input()
end