local DonBG4          = require("background/bg_objects/donbg/4")
local BGNormal        = require("background/bg_objects/bg_normal")
local Fever           = require("background/bg_objects/fever")
local Footer          = require("background/bg_objects/footer")
local Dancer          = require("background/bg_objects/dancer")
local RendaController = require("background/bg_objects/renda")
local ChibiController = require("background/bg_objects/chibi")

local COLLAB_PATH     = "background/collab/mh3G"
local MAX_DANCERS     = 5

local Mh3GBGFever   = {}
Mh3GBGFever.__index = Mh3GBGFever

function Mh3GBGFever.new()
    local self = setmetatable({}, Mh3GBGFever)
    self.name = "bg_fever_0"
    tex.load_folder(COLLAB_PATH, "bg_fever/" .. self.name)
    self.wave_texture = tex.get_texture_info(self.name, "wave")
    self.wave_move = anim.move(4000, { total_distance = -self.wave_texture.width, loop = true })
    self.wave_move:start()
    self._id_wave    = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "wave") or 0
    self._id_crests  = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "crests") or 0
    return self
end

function Mh3GBGFever:start() end
function Mh3GBGFever:update(current_time_ms) self.wave_move:update(current_time_ms) end

function Mh3GBGFever:draw()
    for i = 0, 4 do
        tex.draw_texture(self._id_wave, {
            x = (i * self.wave_texture.width) + self.wave_move.attribute
        })
    end
    tex.draw_texture(self._id_crests)
end

function Mh3GBGFever:destroy() tex.unload_folder(COLLAB_PATH, "bg_fever/" .. self.name) end

-- Background

local Mh3GBackground = {}
Mh3GBackground.__index = Mh3GBackground

function Mh3GBackground.new(player_num, bpm)
    local self          = setmetatable({}, Mh3GBackground)
    self.donbg          = DonBG4.new(1, player_num, COLLAB_PATH)
    self.bg_normal      = BGNormal.Base.new(0, COLLAB_PATH)
    self.bg_fever       = Mh3GBGFever.new()
    self.footer         = Footer.new(COLLAB_PATH, 0)
    self.fever          = Fever.create(0, bpm, COLLAB_PATH)
    self.dancer         = Dancer.BaseDancerGroup.new(0, bpm, MAX_DANCERS, COLLAB_PATH)
    self.renda          = RendaController.new(COLLAB_PATH, 0)
    self.chibi          = ChibiController.new(bpm, COLLAB_PATH, 1)
    self.is_clear       = false
    self.is_rainbow     = false
    self.last_milestone = 1

    return self
end

function Mh3GBackground:update(current_ms, bpm)
    self.donbg:update(current_ms, bpm)
    self.bg_fever:update(current_ms)
    self.fever:update(current_ms, bpm)
    self.dancer:update(current_ms, bpm)
    self.renda:update(current_ms)
    self.chibi:update(current_ms, bpm)
end

function Mh3GBackground:handle_good(player_num) self.chibi:add_chibi(player_num, false) end

function Mh3GBackground:handle_ok(player_num) self.chibi:add_chibi(player_num, false) end

function Mh3GBackground:handle_bad(player_num) self.chibi:add_chibi(player_num, true) end

function Mh3GBackground:handle_drumroll(player_num) self.renda:add_renda() end

function Mh3GBackground:handle_balloon(player_num) self.renda:add_renda() end

function Mh3GBackground:handle_gauge(player_num, progress, is_clear, is_rainbow)
    self.donbg:set_clear(is_clear)
    if is_rainbow and not self.is_rainbow then self.fever:start() end
    if not is_rainbow and self.is_rainbow then self.fever:stop() end
    self.is_clear   = is_clear
    self.is_rainbow = is_rainbow

    local current_milestone
    if is_clear then
        current_milestone = MAX_DANCERS
    else
        current_milestone = math.min(MAX_DANCERS - 1, math.floor(progress * MAX_DANCERS))
    end
    if current_milestone > self.last_milestone then
        for _ = 1, current_milestone - self.last_milestone do self.dancer:add_dancer() end
        self.last_milestone = current_milestone
    elseif current_milestone < self.last_milestone then
        for _ = 1, self.last_milestone - current_milestone do self.dancer:remove_dancer() end
        self.last_milestone = current_milestone
    end
end

function Mh3GBackground:draw_back()
    self.bg_normal:draw()
    if self.is_clear then self.bg_fever:draw() end
    self.footer:draw()
    self.donbg:draw()
    self.renda:draw()
    self.dancer:draw()
    self.fever:draw()
    self.chibi:draw()
end

function Mh3GBackground:draw_fore() end

function Mh3GBackground:destroy()
    self.donbg:destroy()
    self.bg_normal:destroy()
    self.bg_fever:destroy()
    self.fever:destroy()
    self.dancer:destroy()
    self.footer:destroy()
    self.renda:destroy()
    self.chibi:destroy()
end

return Mh3GBackground