require("config.util")

local mods = {}

function mods.eye_of_changes_bullet(pat)
  for idx = 0, 11 do
    pat:update_frame(822, 5, idx, { sp_damage = 200 })
  end
end

function mods.startup_6a(pat)
  pat:update_frame(302, 0, 1, { duration = 4 })
end

function mods.startup_db(pat)
  pat:update_frame(408, 0, 5, { duration = 3 })
end

function mods.recovery_j6a(pat)
  pat:update_frame(307, 0, 7, { duration = 10 })
  -- pat:update_frame(307, 0, 12, { duration = 4 })
end

function mods.startup_j2a(pat)
  pat:update_frame(308, 0, 0, { duration = 2 })
  pat:update_frame(308, 0, 1, { duration = 2 })
end

function mods.cancel_priority_j2a(pat)
  local prior_this, prior_next = pat:get_sequence(307, 0):get_priority()

  for off = 0, 2 do  
    pat:get_sequence(308, off):set_priority(prior_this, prior_next)
  end
end

function mods.multihit_j2a(pat)
  pat:update_frame(308, 1, 0, function(frame)
    frame.duration = 3
    frame.damage = 300
    frame.proration = 950
    frame.limit = 10
    frame.card_gain_hit = 30
    frame.card_gain_block = 20
    frame.untech = 60 -- +15
    frame.blockstop_enemy = 7
    frame.blockstop_self = 7
    frame.hitstop_enemy = 7
    frame.hitstop_self = 7
    frame.sp_damage = 50
    unset_aflag(frame, AF_COUNTER_HIT)
  end)
end

function mods.landing_recovery_j2a(pat)
  for idx = 0, 3 do
    pat:update_frame(308, 2, idx, { duration = 3 })
  end
end

function mods.m_cancel_b(pat)
  pat:update_frame(400, 0, 3, { duration = 10 })
end

function mods.m_cancel_2b(pat)
  pat:update_frame(402, 0, 6, { duration = 10 })
end

function mods.bewitching_bait_cancel(pat)
  for seq = 510, 513 do
    pat:update_frame(seq, 0, 6, function(frame)
      frame.duration = 10
      set_fflag(frame, FF_ATTACK_CANCEL)
    end)
    pat:update_frame(seq, 0, 7, { duration = 12 })
  end
end

function mods.zen_temple_parameters(pat)
  pat:update_frame(521, 1, 0, { launch_vector_y = 1500 })
end

function mods.manji_parameters(pat)
  local aflags = pat:get_frame(816, 1, 0).aflags

  for _, off in ipairs({0, 2}) do
    for idx = 0, 1 do
      pat:update_frame(816, off, idx, {
        velocity_x = 0,
        velocity_y = 500,
        untech = 35,
        proration = 980,
        aflags = aflags
      })
    end
  end
end

function mods.brains_feet_b_startup(pat)
  pat:update_frame(530, 0, 2, { duration = 10 })
end

function mods.brains_feet_c_startup(pat)
  pat:update_frame(531, 0, 2, { duration = 50 })
end

function mods.chen_object_parameters(pat)
  pat:update_frame(854, 2, 0, { untech = 60 })
end

function mods.flesh_dismantler_graze(pat)
  local function set_graze(frame)
    set_fflag(frame, FF_GRAZE)
  end

  pat:update_frame(565, 1, 1, set_graze)
  pat:update_frame(565, 2, 0, set_graze)
  pat:update_frame(566, 2, 0, set_graze)
  pat:update_frame(566, 2, 1, set_graze)
end

return function(pat)
  mods.eye_of_changes_bullet(pat)
  mods.startup_6a(pat)
  mods.startup_db(pat)
  mods.recovery_j6a(pat)
  -- mods.startup_j2a(pat)
  
  if config:get("yukari", "j2a", "enable_multihit") then
    mods.multihit_j2a(pat)
  end
  
  if config:get("yukari", "j2a", "bullet_cancelable") then
    mods.cancel_priority_j2a(pat)
  end
  
  -- mods.landing_recovery_j2a(pat)
  -- mods.m_cancel_b(pat)
  mods.m_cancel_2b(pat)

  mods.bewitching_bait_cancel(pat)
  mods.zen_temple_parameters(pat)

  if config:get("yukari", "manji_parasol", "active_while_holding") then
    mods.manji_parameters(pat)
  end
  
  -- mods.brains_feet_b_startup(pat)
  -- mods.brains_feet_c_startup(pat)
  mods.flesh_dismantler_graze(pat)
  mods.chen_object_parameters(pat)
end