local DonBGBase       = require("background/bg_objects/donbg/base")
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/toho"
local MAX_DANCERS     = 5

local TohoBGFever   = {}
TohoBGFever.__index = TohoBGFever

function TohoBGFever.new()
    local self = setmetatable({}, TohoBGFever)
    self.name = "bg_fever_0"
    tex.load_folder(COLLAB_PATH, "bg_fever/" .. self.name)
    self.night_fade = anim.fade(1500, { initial_opacity = 0.0, final_opacity = 1.0 })
    self._id_day      = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "day") or 0
    self._id_night    = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "night") or 0
    self._id_lanterns = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "lanterns") or 0
    self._id_glow     = tex.get_texture(COLLAB_PATH .. "/" .. self.name .. "/" .. "glow") or 0
    return self
end

function TohoBGFever:start() self.night_fade:start() end
function TohoBGFever:update(current_time_ms) self.night_fade:update(current_time_ms) end

function TohoBGFever:draw()
    tex.draw_texture(self._id_day)
    tex.draw_texture(self._id_night, { fade = self.night_fade.attribute })
    tex.draw_texture(self._id_lanterns, { fade = self.night_fade.attribute })
    tex.draw_texture(self._id_glow, { fade = self.night_fade.attribute, blend = "additive" })
end

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

-- Background

local TohoBackground = {}
TohoBackground.__index = TohoBackground

function TohoBackground.new(player_num, bpm)
    local self          = setmetatable({}, TohoBackground)
    self.donbg          = DonBGBase.new(1, player_num, COLLAB_PATH)
    self.bg_normal      = BGNormal.Base.new(0, COLLAB_PATH)
    self.bg_fever       = TohoBGFever.new()
    self.footer         = Footer.new(COLLAB_PATH, -1)
    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 TohoBackground:update(current_ms, bpm)
    self.donbg:update(current_ms)
    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 TohoBackground:handle_good(player_num) self.chibi:add_chibi(player_num, false) end

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

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

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

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

function TohoBackground:handle_gauge(player_num, progress, is_clear, is_rainbow)
    self.donbg:set_clear(is_clear)
    if is_clear and not self.is_clear then self.bg_fever:start() end
    if is_rainbow and not self.is_rainbow then self.fever:start() 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 TohoBackground:draw_back()
    if self.is_clear then
        self.bg_fever:draw()
    else
        self.bg_normal:draw()
    end
    self.donbg:draw()
    self.renda:draw()
    self.dancer:draw()
    self.footer:draw()
    if self.is_rainbow then self.fever:draw() end
    self.chibi:draw()
end

function TohoBackground:draw_fore() end

function TohoBackground: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 TohoBackground