BatterUp/src/main.lua

-- stylua: ignore start
import 'CoreLibs/animation.lua'
import 'CoreLibs/animator.lua'
import 'CoreLibs/easing.lua'
import 'CoreLibs/graphics.lua'
import 'CoreLibs/object.lua'
import 'CoreLibs/timer.lua'
import 'CoreLibs/ui.lua'
-- stylua: ignore end

--- @alias EasingFunc fun(number, number, number, number): number

--- @alias LaunchBall fun(
---   destX: number,
---   destY: number,
---   easingFunc: EasingFunc,
---   flyTimeMs: number | nil,
---   floaty: boolean | nil,
---   customBallScaler: pd_animator | nil,
--- )

-- stylua: ignore start
import 'utils.lua'
import 'constants.lua'
import 'assets.lua'
import 'draw/overlay.lua'
import 'draw/fielder.lua'

import 'action-queue.lua'
import 'announcer.lua'
import 'ball.lua'
import 'baserunning.lua'
import 'dbg.lua'
import 'fielding.lua'
import 'graphics.lua'
import 'npc.lua'
-- stylua: ignore end

-- selene: allow(shadowing)
local gfx <const>, C <const> = playdate.graphics, C

local announcer = Announcer.new()
local fielding = Fielding.new()

---@alias SimpleAnimator { currentValue: fun(self): number; reset: fun(self, durationMs: number | nil) }

local deltaSeconds = 0

local ball = Ball.new(gfx.animator)

---@alias Team { score: number, benchPosition: XyPair }

---@type table<string, Team>
local teams <const> = {
    home = {
        score = 0,
        benchPosition = utils.xy(C.Screen.W + 10, C.Center.y),
    },
    away = {
        score = 0,
        benchPosition = utils.xy(-10, C.Center.y),
    },
}

local UserTeam <const> = teams.away
local battingTeam = teams.away
local inning = 1
local offenseState = C.Offense.batting

-- TODO: Replace with timers, repeatedly reset, instead of constantly setting to 0
local secondsSinceLastRunnerMove = 0
local secondsSincePitchAllowed = -5

local catcherThrownBall = false

local batBase <const> = utils.xy(C.Center.x - 34, 215)
local batTip <const> = utils.xy(0, 0)

local batAngleDeg = C.CrankOffsetDeg

---@alias Pitch { x: SimpleAnimator, y: SimpleAnimator, z: SimpleAnimator | nil }

---@type Pitch[]
local Pitches <const> = {
    -- Fastball
    {
        x = gfx.animator.new(0, C.PitchStartX, C.PitchStartX, playdate.easingFunctions.linear),
        y = gfx.animator.new(C.PitchFlyMs / 1.3, C.PitchStartY, C.PitchEndY, playdate.easingFunctions.linear),
    },
    -- Curve ball
    {
        x = gfx.animator.new(C.PitchFlyMs, C.PitchStartX + 20, C.PitchStartX, utils.easingHill),
        y = gfx.animator.new(C.PitchFlyMs, C.PitchStartY, C.PitchEndY, playdate.easingFunctions.linear),
    },
    -- Slider
    {
        x = gfx.animator.new(C.PitchFlyMs, C.PitchStartX - 20, C.PitchStartX, utils.easingHill),
        y = gfx.animator.new(C.PitchFlyMs, C.PitchStartY, C.PitchEndY, playdate.easingFunctions.linear),
    },
    -- Wobbbleball
    {
        x = {
            currentValue = function()
                return C.PitchStartX + (10 * math.sin((ball.yAnimator:currentValue() - C.PitchStartY) / 10))
            end,
            reset = function() end,
        },
        y = gfx.animator.new(C.PitchFlyMs * 1.3, C.PitchStartY, C.PitchEndY, playdate.easingFunctions.linear),
    },
}

---@return boolean userIsOnSide, boolean playerIsOnOtherSide
local function userIsOn(side)
    local ret
    if UserTeam == battingTeam then
        ret = side == C.Sides.offense
    else
        ret = side == C.Sides.defense
    end
    return ret, not ret
end

--- Launches the ball from its current position to the given destination.
---@param destX number
---@param destY number
---@param easingFunc EasingFunc
---@param flyTimeMs number | nil
---@param floaty boolean | nil
---@param customBallScaler pd_animator | nil
local function launchBall(destX, destY, easingFunc, flyTimeMs, floaty, customBallScaler)
    throwMeter:reset()
    ball:launch(destX, destY, easingFunc, flyTimeMs, floaty, customBallScaler)
end

---@param pitchFlyTimeMs number | nil
---@param pitchTypeIndex number | nil
local function pitch(pitchFlyTimeMs, pitchTypeIndex)
    catcherThrownBall = false
    offenseState = C.Offense.batting

    local current = Pitches[pitchTypeIndex]
    ball.xAnimator = current.x
    ball.yAnimator = current.y or Pitches[1].y

    -- TODO: This would need to be sanely replaced in launchBall() etc.
    -- if current.z then
    -- 	ball.floatAnimator = current.z
    -- 	ball.floatAnimator:reset()
    -- end

    if pitchFlyTimeMs then
        ball.xAnimator:reset(pitchFlyTimeMs)
        ball.yAnimator:reset(pitchFlyTimeMs)
    else
        ball.xAnimator:reset()
        ball.yAnimator:reset()
    end

    secondsSincePitchAllowed = 0
end

local function nextHalfInning()
    pitchTracker:reset()
    local currentlyFieldingTeam = battingTeam == teams.home and teams.away or teams.home
    local gameOver = inning == 9 and teams.away.score ~= teams.home.score
    if not gameOver then
        fielding:celebrate()
        secondsSinceLastRunnerMove = -7
        fielding:benchTo(currentlyFieldingTeam.benchPosition)
        announcer:say("SWITCHING SIDES...")
    end

    -- TODO: Make the overlay handle its own dang delay.
    -- Delay to keep end-of-inning on the scoreboard for a few seconds
    playdate.timer.new(3000, function()
        battingTeam = currentlyFieldingTeam
        if gameOver then
            announcer:say("AND THAT'S THE BALL GAME!")
        else
            fielding:resetFielderPositions()
            if battingTeam == teams.home then
                inning = inning + 1
            end
        end
    end)
end

local baserunning = Baserunning.new(announcer, nextHalfInning)
local npc = Npc.new(baserunning.runners, fielding.fielders)

---@param scoredRunCount number
local function score(scoredRunCount)
    battingTeam.score = battingTeam.score + scoredRunCount
    announcer:say("SCORE!")
end

---@param throwFlyMs number
---@return boolean didThrow
local function buttonControlledThrow(throwFlyMs, forbidThrowHome)
    local targetBase
    if playdate.buttonIsPressed(playdate.kButtonLeft) then
        targetBase = C.Bases[C.Third]
    elseif playdate.buttonIsPressed(playdate.kButtonUp) then
        targetBase = C.Bases[C.Second]
    elseif playdate.buttonIsPressed(playdate.kButtonRight) then
        targetBase = C.Bases[C.First]
    elseif not forbidThrowHome and playdate.buttonIsPressed(playdate.kButtonDown) then
        targetBase = C.Bases[C.Home]
    else
        return false
    end

    -- Power for this throw has already been determined
    throwMeter:reset()

    fielding:userThrowTo(targetBase, launchBall, throwFlyMs)
    secondsSinceLastRunnerMove = 0
    offenseState = C.Offense.running

    return true
end

local function nextBatter()
    secondsSincePitchAllowed = -3
    baserunning.batter = nil
    playdate.timer.new(2000, function()
        pitchTracker:reset()
        if not baserunning.batter then
            baserunning.batter = baserunning:newRunner()
        end
    end)
end

local function walk()
    announcer:say("Walk!")
    baserunning.batter.nextBase = C.Bases[C.First]
    baserunning.batter.prevBase = C.Bases[C.Home]
    offenseState = C.Offense.walking
    baserunning.batter = nil
    baserunning:updateForcedRunners()
    nextBatter()
end

local function strikeOut()
    local outBatter = baserunning.batter
    baserunning.batter = nil
    baserunning:outRunner(outBatter --[[@as Runner]], "Strike out!")
    nextBatter()
end

---@param batDeg number
local function updateBatting(batDeg, batSpeed)
    local batAngle = math.rad(batDeg)
    -- TODO: animate bat-flip or something
    batBase.x = baserunning.batter and (baserunning.batter.x + C.BatterHandPos.x) or 0
    batBase.y = baserunning.batter and (baserunning.batter.y + C.BatterHandPos.y) or 0
    batTip.x = batBase.x + (C.BatLength * math.sin(batAngle))
    batTip.y = batBase.y + (C.BatLength * math.cos(batAngle))

    if
        batSpeed > 0
        and utils.pointDirectlyUnderLine(ball.x, ball.y, batBase.x, batBase.y, batTip.x, batTip.y, C.Screen.H)
        and ball.y < 232
    then
        -- Hit!
        BatCrackReverb:play()
        offenseState = C.Offense.running
        local ballAngle = batAngle + math.rad(90)

        local mult = math.abs(batSpeed / 15)
        local ballVelX = mult * 10 * math.sin(ballAngle)
        local ballVelY = mult * 5 * math.cos(ballAngle)
        if ballVelY > 0 then
            ballVelX = ballVelX * -1
            ballVelY = ballVelY * -1
        end
        local ballDestX = ball.x + (ballVelX * C.BattingPower)
        local ballDestY = ball.y + (ballVelY * C.BattingPower)
        pitchTracker:reset()
        local hitBallScaler = gfx.animator.new(2000, 9 + (mult * mult * 0.5), C.SmallestBallRadius, utils.easingHill)
        launchBall(ballDestX, ballDestY, playdate.easingFunctions.outQuint, 2000, nil, hitBallScaler)

        if utils.isFoulBall(ballDestX, ballDestY) then
            announcer:say("Foul ball!")
            pitchTracker.strikes = math.min(pitchTracker.strikes + 1, 2)
            -- TODO: Have a fielder chase for the fly-out
            return
        end

        baserunning.batter.nextBase = C.Bases[C.First]
        baserunning.batter.prevBase = C.Bases[C.Home]
        baserunning:updateForcedRunners()
        baserunning.batter.forcedTo = C.Bases[C.First]
        baserunning.batter = nil -- Demote batter to a mere runner

        fielding:haveSomeoneChase(ballDestX, ballDestY)
    end
end

---@param appliedSpeed number
---@return boolean someRunnerMoved
local function updateNonBatterRunners(appliedSpeed, forcedOnly)
    local runnerMoved, runnersScored = baserunning:updateNonBatterRunners(appliedSpeed, forcedOnly, deltaSeconds)
    if runnersScored ~= 0 then
        score(runnersScored)
    end
    return runnerMoved
end

local function userPitch(throwFly)
    local aButton = playdate.buttonIsPressed(playdate.kButtonA)
    local bButton = playdate.buttonIsPressed(playdate.kButtonB)
    if not aButton and not bButton then
        pitch(throwFly, 1)
    elseif aButton and not bButton then
        pitch(throwFly, 2)
    elseif not aButton and bButton then
        pitch(throwFly, 3)
    elseif aButton and bButton then
        pitch(throwFly, 4)
    end
end

local function updateGameState()
    deltaSeconds = playdate.getElapsedTime() or 0
    playdate.resetElapsedTime()
    local crankChange = playdate.getCrankChange() --[[@as number]]
    local crankLimited = crankChange == 0 and 0 or (math.log(math.abs(crankChange)) * C.CrankPower)
    if crankChange < 0 then
        crankLimited = crankLimited * -1
    end

    if ball.heldBy then
        ball.x = ball.heldBy.x
        ball.y = ball.heldBy.y
        ball.size = C.SmallestBallRadius
    else
        ball.x = ball.xAnimator:currentValue()
        ball.z = ball.floatAnimator:currentValue()
        ball.y = ball.yAnimator:currentValue() + ball.z
        ball.size = ball.sizeAnimator:currentValue()
    end

    local userOnOffense, userOnDefense = userIsOn(C.Sides.offense)

    if userOnDefense then
        throwMeter:applyCharge(deltaSeconds, crankLimited)
    end

    if offenseState == C.Offense.batting then
        if ball.y < C.StrikeZoneStartY then
            pitchTracker.recordedPitchX = nil
        elseif not pitchTracker.recordedPitchX then
            pitchTracker.recordedPitchX = ball.x
        end

        local pitcher = fielding.fielders.pitcher
        if utils.distanceBetween(pitcher.x, pitcher.y, C.PitcherStartPos.x, C.PitcherStartPos.y) < C.BaseHitbox then
            secondsSincePitchAllowed = secondsSincePitchAllowed + deltaSeconds
        end

        if secondsSincePitchAllowed > C.ReturnToPitcherAfterSeconds and not catcherThrownBall then
            local outcome = pitchTracker:updatePitchCounts()
            if outcome == PitchOutcomes.StrikeOut then
                strikeOut()
            elseif outcome == PitchOutcomes.Walk then
                walk()
            end
            -- Catcher has the ball. Throw it back to the pitcher
            launchBall(C.PitchStartX, C.PitchStartY, playdate.easingFunctions.linear, nil, true)
            catcherThrownBall = true
        end

        local batSpeed
        if userOnOffense then
            batAngleDeg = (playdate.getCrankPosition() + C.CrankOffsetDeg) % 360
            batSpeed = crankLimited
        else
            batAngleDeg = npc:updateBatAngle(ball, catcherThrownBall, deltaSeconds)
            batSpeed = npc:batSpeed() * deltaSeconds
        end

        updateBatting(batAngleDeg, batSpeed)

        -- Walk batter to the plate
        -- TODO: Ensure batter can't be nil, here
        baserunning:updateRunner(baserunning.batter, nil, crankLimited, deltaSeconds)

        if secondsSincePitchAllowed > C.PitchAfterSeconds then
            if userOnDefense then
                local throwFly = throwMeter:readThrow()
                if throwFly and not buttonControlledThrow(throwFly, true) then
                    userPitch(throwFly)
                end
            else
                pitch(C.PitchFlyMs / npc:pitchSpeed(), math.random(#Pitches))
            end
        end
    elseif offenseState == C.Offense.running then
        local appliedSpeed = userOnOffense and crankLimited or npc:runningSpeed()
        if updateNonBatterRunners(appliedSpeed) then
            secondsSinceLastRunnerMove = 0
        else
            secondsSinceLastRunnerMove = secondsSinceLastRunnerMove + deltaSeconds
            if secondsSinceLastRunnerMove > C.ResetFieldersAfterSeconds then
                -- End of play. Throw the ball back to the pitcher
                launchBall(C.PitchStartX, C.PitchStartY, playdate.easingFunctions.linear, nil, true)
                fielding:resetFielderPositions()
                offenseState = C.Offense.batting
                -- TODO: Remove, or replace with nextBatter()
                if not baserunning.batter then
                    baserunning.batter = baserunning:newRunner()
                end
            end
        end
    elseif offenseState == C.Offense.walking then
        if not updateNonBatterRunners(C.WalkedRunnerSpeed, true) then
            offenseState = C.Offense.batting
        end
    end

    local fielderHoldingBall = fielding:updateFielderPositions(ball, deltaSeconds)

    if userOnDefense then
        local throwFly = throwMeter:readThrow()
        if throwFly then
            buttonControlledThrow(throwFly)
        end
    end
    if fielderHoldingBall then
        local outedSomeRunner = baserunning:outEligibleRunners(fielderHoldingBall)
        if userOnOffense then
            npc:fielderAction(offenseState, fielderHoldingBall, outedSomeRunner, ball, launchBall)
        end
    end

    baserunning:walkAwayOutRunners(deltaSeconds)
    actionQueue:runWaiting(deltaSeconds)
end

function playdate.update()
    playdate.timer.updateTimers()
    gfx.animation.blinker.updateAll()
    updateGameState()

    gfx.clear()
    gfx.setColor(gfx.kColorBlack)

    local offsetX, offsetY = getDrawOffset(ball.x, ball.y)
    gfx.setDrawOffset(offsetX, offsetY)

    GrassBackground:draw(-400, -240)

    local ballIsHeld = fielding:drawFielders(ball)

    if offenseState == C.Offense.batting then
        gfx.setLineWidth(5)
        gfx.drawLine(batBase.x, batBase.y, batTip.x, batTip.y)
    end

    local playerHeightOffset = 10
    -- TODO? Scale sprites down as y increases
    for _, runner in pairs(baserunning.runners) do
        if runner == baserunning.batter then
            if batAngleDeg > 50 and batAngleDeg < 200 then
                PlayerBack:draw(runner.x, runner.y - playerHeightOffset)
            else
                Player:draw(runner.x, runner.y - playerHeightOffset)
            end
        else
            -- TODO? Change blip speed depending on runner speed?
            PlayerImageBlipper:draw(false, runner.x, runner.y - playerHeightOffset)
        end
    end

    for _, runner in pairs(baserunning.outRunners) do
        PlayerFrown:draw(runner.x, runner.y - playerHeightOffset)
    end

    if not ballIsHeld then
        gfx.setLineWidth(2)

        gfx.setColor(gfx.kColorWhite)
        gfx.fillCircleAtPoint(ball.x, ball.y, ball.size)

        gfx.setColor(gfx.kColorBlack)
        gfx.drawCircleAtPoint(ball.x, ball.y, ball.size)
    end

    gfx.setDrawOffset(0, 0)
    if math.abs(offsetX) > 10 or math.abs(offsetY) > 10 then
        drawMinimap(baserunning.runners, fielding.fielders)
    end
    drawScoreboard(0, C.Screen.H * 0.77, teams, baserunning.outs, battingTeam, inning)
    drawBallsAndStrikes(290, C.Screen.H - 20, pitchTracker.balls, pitchTracker.strikes)
    announcer:draw(C.Center.x, 10)

    if playdate.isCrankDocked() then
        playdate.ui.crankIndicator:draw()
    end
end

local function init()
    playdate.display.setRefreshRate(50)
    gfx.setBackgroundColor(gfx.kColorWhite)
    playdate.setMenuImage(gfx.image.new("images/game/menu-image.png"))
    fielding:resetFielderPositions(teams.home.benchPosition)
    playdate.getSystemMenu():addMenuItem("Restart game", function() end) -- TODO?

    playdate.timer.new(2000, function()
        launchBall(C.PitchStartX, C.PitchStartY, playdate.easingFunctions.linear, nil, false)
    end)
    BootTune:play()
    BootTune:setFinishCallback(function()
        TinnyBackground:play()
    end)
end

init()