class_name Params
## Game tuning values, ported from the cocos2d-x params.h.

# Ball
const BALL_RADIUS := 15.0
const THROW_ANGLE := 20.0 # degrees either side of straight up
const INITIAL_SPEED := 500.0
const BALL_BOUNCE := 1.005 # every bounce speeds the ball up a little
const BALL_GRAVITY := 250.0 # px/s², pulls sideways-bouncing balls back to the paddle

# Core
const CORE_RADIUS := 50.0

# Paddle
const PADDLE_WIDTH := 120.0
const PADDLE_HEIGHT := 10.0
const PADDLE_ALTITUDE := 90.0 # distance from the bottom of the screen
const PADDLE_MAX_ANGLE := 60.0 # degrees from vertical when the ball leaves the paddle's tip
const PADDLE_CLEARANCE := 6.0 * 2.0 * BALL_RADIUS # min space between the outer ring and the paddle
const RING_SIZE := CORE_RADIUS * 0.75 # ring thickness when there is room for it
const HIGHEST_CORE := 0.36 # the core moves up to this fraction of the screen height to make room

# Colors
const COLOR_PINK := Color("#f92672")
const COLOR_BLUE := Color("#66d9ef")
const COLOR_GREEN := Color("#a6e22e")
const COLOR_ORANGE := Color("#fd971f")
const COLOR_GREY := Color("#787878")
const COLOR_RED := Color(0.988, 0.147, 0.030)
const COLOR_FIRE := Color("#ff5a1f")
const COLOR_BACK := Color("#272822")
const COLOR_BOMB := Color("#4a4a44")

# Physics layers (bit values)
const LAYER_WALLS := 1
const LAYER_PADDLE := 2
const LAYER_BLOCKS := 4
const LAYER_BALLS := 8
const LAYER_POWER_UPS := 16

# Power-ups. Every POWER_UP_INTERVAL seconds a drop is rolled (power_up_chance), and the
# kind is picked by the weights in PowerUp.KINDS. Triple balls roll separately.
const DROP_TRIPLE_BALL := 0.06 # multiplied by seconds since a ball last touched anything
const POWER_UP_INTERVAL := 2.5
const POWER_UP_PADDLE_SECONDS := 10.0
const SLOW_SCALE := 0.6
const SLOW_SECONDS := 8.0
const RUSH_SCALE := 1.35
const RUSH_SECONDS := 6.0
const CATCH_SECONDS := 12.0
const CATCH_HOLD_SECONDS := 2.0 # a caught ball leaves by itself after this
const SHIELD_CHARGES := 1
const BIG_BALL_SECONDS := 10.0
const FIREBALL_SECONDS := 5.0
const LASER_SECONDS := 6.0
const FREEZE_SECONDS := 8.0
const BOMB_RADIUS := 90.0
const HOMING_SECONDS := 6.0

# Core pull: as segments run out, the core draws nearby balls in so levels don't drag.
const CORE_PULL := 450.0 # px/s² when every breakable segment is gone
const CORE_PULL_REACH := 120.0 # px beyond the outer ring

# Score: points per break, times a combo multiplier that grows with breaks in a row
# (without the ball touching the paddle).
const POINTS_PER_BREAK := 10
const BREAKS_PER_COMBO_STEP := 3
const MAX_COMBO := 5

# Feel
const SHAKE_MAX := 14.0 # px at full trauma
const SHAKE_DECAY := 1.6 # trauma lost per second

# Hours without playing before the saved level drops by one
const LOSE_HOURS := 12

# Text
const MSG_TRIPLE_BALLS := "Triple Balls!"
const MSG_OVER := "Game Over..."
const MSG_DOUBLE_PADDLE := "Doubled paddle!"
const MSG_HALF_PADDLE := "Half paddle :("
const MSG_LEVEL_BACK := "You are at level %d. Play within %.1f hour(s) or you will drop back a level."
const MSG_NEXT_LEVEL := "Next Level"
const MSG_LEVEL_DONE := "Level %d complete"
const MSG_RESTART := "Restart"
const MSG_SUPER_BALL := "Super Ball!"
const MSG_SLOW := "Slow motion"
const MSG_CATCH := "Catch! Lift your finger to throw"
const MSG_SHIELD := "Shield!"
const MSG_SHIELD_USED := "Shield saved you!"
const MSG_BIG_BALL := "Big ball!"
const MSG_FIREBALL := "Fireball!"
const MSG_RUSH := "Rush! :("
const MSG_LASER := "Lasers!"
const MSG_FREEZE := "Rings frozen"
const MSG_BOMB := "Bomb ball!"
const MSG_HOMING := "Homing ball!"


# Progression: how the game gets harder level by level. Every curve only goes up.

const MAX_RINGS := 14
const FIRST_SPECIAL_LEVEL := 15 # water arrives here; the rest every 50 levels after


## Rings around the core: 1 at level 0, 3 at level 12, 6 at 75, 10 at 243, 14 from 507.
static func ring_count(level: int) -> int:
	return mini(MAX_RINGS, 1 + int(sqrt(level / 3.0)))


## Share of segments that are indestructible.
static func indestructible_chance(level: int) -> float:
	return minf(0.3, level * 0.004)


## Bounces and speed-ups stop at this speed, in px/s.
static func max_ball_speed(level: int) -> float:
	return 850.0 + minf(150.0, level * 0.3)

## Fastest a ring can turn, in degrees per second.
static func ring_speed(level: int) -> float:
	return 30.0 + minf(40.0, level * 0.25)


## Launch speed of a new ball.
static func launch_speed(level: int) -> float:
	return INITIAL_SPEED + minf(150.0, level * 1.0)


## Share of segments that are a special kind (water, ice, ...), once the first has unlocked.
static func special_segment_share(level: int) -> float:
	if level < FIRST_SPECIAL_LEVEL:
		return 0.0
	return minf(0.5, 0.06 + (level - FIRST_SPECIAL_LEVEL) * 0.0012)


## Seconds to win a level within for three stars; twice that for two.
static func par_seconds(level: int) -> float:
	return 60.0 + minf(60.0, level * 0.8)


## Chance of a power-up drop every POWER_UP_INTERVAL seconds.
static func power_up_chance(level: int) -> float:
	return 0.12 + minf(0.06, level * 0.0006)


## Multiplier on power-down weights: they get likelier as the levels go up.
static func power_down_factor(level: int) -> float:
	return 1.0 + minf(2.0, level / 100.0)