# fight.ludic - what takes, how big it is, and the green band the marker has to cross in
# a legend on a lure, likelier in deep water and with skill; else an everyday one by weight
function fishing_pick(fishing_st: mut FishingState) -> int {
  let leg = fishing_legend()
  if leg >= 0 and fishing_st.fishing_lure_on {
    let k = FishSpecies[leg]
    var p = k.chance
    if FishingWorld.afloat() or FishingWorld.depth(fishing_st.fishing_bx, fishing_st.fishing_bz) >= fishing_st.fishing_deep { p = k.chance_deep }
    if fishing_rand(fishing_st) < p + FishingWorld.skill() { return leg }
  }
  var total = 0.0
  for s in 0 .. FISH_COUNT { if not FishSpecies[s].legend { total = total + FishSpecies[s].weight } }
  var r = fishing_rand(fishing_st) * total
  var last = -1
  for s in 0 .. FISH_COUNT {
    if FishSpecies[s].legend { continue }
    last = s
    r = r - FishSpecies[s].weight
    if r < 0.0 { return s }
  }
  return last
}

function fishing_size(fishing_st: mut FishingState, s: int) -> int {
  let k = FishSpecies[s]
  let spread = int(fishing_rand(fishing_st) * float(k.cm_spread + 1))
  return k.cm_min + spread + int(FishingWorld.skill() * k.skill_cm)
}

# the green's half width this crossing: a fish that closes it does so at every rung, and Hard
# closes it for everything else
export function fishing_window(fishing_st: FishingState) -> float {
  if not fishing_kind_ok(fishing_st.fishing_sp) { return 0.12 }
  let k = FishSpecies[fishing_st.fishing_sp]
  let hw = FishingWorld.window(fishing_st.fishing_sp)
  if k.closes > 0.0 { return Math.max(hw * (1.0 - k.closes * float(fishing_st.fishing_won)), hw * k.floor) }
  if FishingWorld.level() == FISHING_HARD { return Math.max(hw * (1.0 - 0.10 * float(fishing_st.fishing_won)), hw * 0.55) }
  return hw
}

export function fishing_window_lo(fishing_st: FishingState) -> float { return Math.clamp(fishing_st.fishing_win_c - fishing_window(fishing_st), 0.0, 1.0) }
export function fishing_window_hi(fishing_st: FishingState) -> float { return Math.clamp(fishing_st.fishing_win_c + fishing_window(fishing_st), 0.0, 1.0) }

# where it sits: the middle on Relaxed, somewhere new each crossing above it
function fishing_new_window(fishing_st: mut FishingState) -> void {
  let lv = FishingWorld.level()
  if lv == FISHING_RELAXED or fishing_st.fishing_gentle_on {
    fishing_st.fishing_win_c = 0.5
    return
  }
  let hw = fishing_window(fishing_st) + 0.05
  fishing_st.fishing_win_c = hw + fishing_rand(fishing_st) * (1.0 - hw - hw)
}

function fishing_in_window(fishing_st: FishingState) -> bool {
  return fishing_st.fishing_mark > fishing_st.fishing_win_c - fishing_window(fishing_st) and fishing_st.fishing_mark < fishing_st.fishing_win_c + fishing_window(fishing_st)
}