-- Input management for keyboard and gamepad (Xbox-style controllers)
-- Player slots assigned in join order: first device to press a button becomes P1, etc.
InputManager = {}
InputManager.__index = InputManager

InputManager.ACTIONS = {
  MOVE_LEFT  = 1,
  MOVE_RIGHT = 2,
  JUMP       = 3,
  ATTACK     = 4,
  DEFEND     = 5,
  ITEM       = 6,
  INTERACT   = 7,
  PAUSE      = 8
}

InputManager.KEY_MAP = {
  [InputManager.ACTIONS.MOVE_LEFT]  = {"left"},
  [InputManager.ACTIONS.MOVE_RIGHT] = {"right"},
  [InputManager.ACTIONS.JUMP]       = {"lshift", "space"},
  [InputManager.ACTIONS.ATTACK]     = {"z"},
  [InputManager.ACTIONS.DEFEND]     = {"x"},
  [InputManager.ACTIONS.ITEM]       = {"c"},
  [InputManager.ACTIONS.INTERACT]   = {"tab"},
  [InputManager.ACTIONS.PAUSE]      = {"escape"}
}

InputManager.JOY_MAP = {
  [InputManager.ACTIONS.MOVE_LEFT]  = {"dpleft"},
  [InputManager.ACTIONS.MOVE_RIGHT] = {"dpright"},
  [InputManager.ACTIONS.JUMP]   = {"a"},
  [InputManager.ACTIONS.ATTACK] = {"x"},
  [InputManager.ACTIONS.DEFEND] = {"b"},
  [InputManager.ACTIONS.ITEM]   = {"y"},
  [InputManager.ACTIONS.INTERACT]   = {"select", "lbumper"},
  [InputManager.ACTIONS.PAUSE]  = {"start"}
}

InputManager.DEADZONE = 0.25

InputManager.KEYBOARD_SOURCE = 999

function InputManager:new()
  local self = setmetatable({}, InputManager)

  self.globalAnySource = nil
  self.globalAny = false


  self.players = {}
  for i = 1, Config.MAX_PLAYERS do
    local actions = {}
    for k, v in pairs(InputManager.ACTIONS) do
      actions[v] = false
    end
    self.players[i] = {
      source = nil,
      actions = actions,
    }
  end

  return self
end

function InputManager:setPlayerAction(playerIdx, action, active)
  self.players[playerIdx].actions[action] = active
end

function InputManager:getSourcePlayerIdx(source)
  for i = 1, Config.MAX_PLAYERS do
    if self.players[i].source == source then
      return i
    end
  end
  return nil
end

function InputManager:hasPlayerAnyInput(playerIdx)
  for action, active in ipairs(self.players[playerIdx].actions) do
    if active then
      return true
    end
  end
  return false
end

function InputManager:isDown(playerIdx, action)
  return (self.players[playerIdx] and self.players[playerIdx].actions[action]) or false
end

function InputManager:wasPressed(playerIdx, action)
  if self.players[playerIdx] and self.players[playerIdx].actions[action] then
    self:setPlayerAction(playerIdx, action, false)
    return true
  end
  return false
end

function InputManager:assignPlayerToSource(source)
  for i = 1, Config.MAX_PLAYERS do
    if self.players[i].source == nil then
      self.players[i].source = source
      return i
    end
  end
  return nil
end

function InputManager:anyPlayerPressed()
  for i = 1, Config.MAX_PLAYERS do
    if self:hasPlayerAnyInput(i) then
      return true
    end
  end
  return false
end

function InputManager:getPlayerInputName(playerIdx)
  local source = (self.players[playerIdx] and self.players[playerIdx].source)
  if source == InputManager.KEYBOARD_SOURCE then
    return "KEYBOARD"
  end
  return "GAMEPAD"
end

-- Raw inputs
function InputManager:setInput(source, input, active)
  self.globalAny = active
  self.globalAnySource = source

  local inputMap = InputManager.JOY_MAP
  if source == InputManager.KEYBOARD_SOURCE then
    inputMap = InputManager.KEY_MAP
  end

  playerIdx = self:getSourcePlayerIdx(source)
  if playerIdx ~= nil then
    for action, binds in pairs(inputMap) do
      for _, binding in ipairs(binds) do
        if binding == input then
          self:setPlayerAction(playerIdx, action, active)
        end
      end
    end
  end

end

function InputManager:pushGamepadAxis(gamepad, axis, value)
end