local _M = { _VERSION = '1.0' }
local brotlienc = require "resty.brotli.encoder"
local brotlidec = require "resty.brotli.decoder"

local mt = { __index = _M }

function _M.new()
    return setmetatable({
                encoder = brotlienc:new(),
                decoder = brotlidec:new(),
            }, mt)
end

-- Return encoded, err
--[[
        config : {
            quality = 0 to 11 (Default 11),
            lgwin = Set Brotli window size. Window size is (1 << lgwin) - 16., 
            mode =  <BROTLI_MODE_GENERIC (0) | BROTLI_MODE_TEXT (1, for UTF-8 format text input) | BROTLI_MODE_FONT (2, for WOFF 2.0) > 
        }
--]] 
function _M.encode(self, input, config)
    if input == nil or type(input) ~= "string" then
        return nil, "Invalid input pass ".. type(input)
    end

    local encoder = self.encoder
    if not encoder then
        return nil, "Encoder is nil"
    end

    return encoder:compressStream(input, config)
end

-- Return encoded, err
function _M.decode(self, input)
    if input == nil or type(input) ~= "string" then
        return
    end

    local decoder = self.decoder
    if not decoder then
        return nil
    end

    return decoder:decompressStream(input)
end

function _M.destroy(self) 
    self.encoder:destroy()
    self.decoder:destroy()
end

return _M