-- Version 0.0.2
-- Author AliasAlreadyTaken
-- License MIT

-- Changelog

-- 0.0.1 First puny attempts
-- 0.0.2 feature complete including settings

local mod_start_time = core.get_us_time()
core.log("action", "[MOD] yl_matterbridge loading")

yl_matterbridge = {}
--yl_matterbridge.error = {}
--yl_matterbridge.modstorage = core.get_mod_storage()
--yl_matterbridge.modpath = core.get_modpath("yl_matterbridge") .. DIR_DELIM
--yl_matterbridge.worldpath = core.get_worldpath() .. DIR_DELIM

yl_matterbridge.information = {}
yl_matterbridge.information.version = "0.0.2"
yl_matterbridge.information.author = "AliasAlreadyTaken"
yl_matterbridge.information.license = "MIT"
yl_matterbridge.information.name = "yl_matterbridge"
yl_matterbridge.information.source = "https://gitea.your-land.de/AliasAlreadyTaken/yl_matterbridge"
yl_matterbridge.information.additional =
    "Sends and receives ingame chat to and from matterbridge https://github.com/42wim/matterbridge"

local address = core.settings:get("yl_matterbridge.address") or "127.0.0.1"
local port = core.settings:get("yl_matterbridge.port") or "4242"
local gateway = core.settings:get("yl_matterbridge.gateway") or "default"
local token = core.settings:get("yl_matterbridge.token") or ""

local http = core.request_http_api()

assert(http, "[MOD] yl_matterbridge: Please add yl_matterbridge to secure.http_mods")

local post_headers = {"Content-Type: application/json"}
if token and token ~= "" then
    table.insert(post_headers, "Authorization: Bearer " .. token)
end
local url_send = "http://" .. address .. ":" .. port .. "/api/message"
local url_receive = "http://" .. address .. ":" .. port .. "/api/messages"

function send(user_name, message_text)
    local timeout = 10
    local data = {
        text = message_text,
        username = user_name,
        gateway = gateway
    }

    http.fetch(
        {
            url = url_send,
            extra_headers = post_headers,
            timeout = timeout,
            post_data = core.write_json(data)
        },
        function(result)
            if result.succeeded then
                local data = core.parse_json(result.data)
                core.log("action", "[MOD] yl_matterbridge : Posted " .. dump(data))
            else
                core.log("error", "[MOD] yl_matterbridge: send/http.fetch failed. Result = " .. dump(result))
                return false
            end
        end
    )
    return true
end

local function receive()
    local timeout = 0

    http.fetch(
        {
            url = url_receive,
            extra_headers = post_headers,
            timeout = timeout
        },
        function(result)
            if result.succeeded then
                local data = core.parse_json(result.data)
                for _, v in ipairs(data) do
                    if v.username and v.text and v.account then
                        core.log("action", "[MOD] yl_matterbridge : Received " .. dump(data))
                        yl_matterbridge.receive_from_bridge(v.username, v.text, v.account)
                    end
                end
            else
                core.log("error", "[MOD] yl_matterbridge: receive/http.fetch failed. Result = " .. dump(result))
                return false
            end
        end
    )
end

-- API
-- Overwrite these function in your chat mod, if you want to govern sending and receveiving yourself
-- Don't forget to add an optional dependency to yl_matterbridge

function yl_matterbridge.receive_from_bridge(user_name, message_text, account_name)
    core.chat_send_all("<" .. account_name .. "|" .. user_name .. "> " .. message_text)
end

function yl_matterbridge.send_to_bridge(user_name, message_text)
    send(user_name, message_text)
end

-- Set this function to yl_matterbridge.chat_message = function() end
-- if you call yl_matterbridge.send_to_bridge yourself

function yl_matterbridge.chat_message(user_name, message_text)
    yl_matterbridge.send_to_bridge(user_name, message_text)
end

-- connect to Minetest
function yl_matterbridge.register_chat()
    core.register_on_chat_message(yl_matterbridge.chat_message)
end

minetest.register_on_mods_loaded(yl_matterbridge.register_chat)

core.register_globalstep(receive)

local mod_end_time = (core.get_us_time() - mod_start_time) / 1000000
core.log("action", "[MOD] yl_matterbridge loaded in [" .. mod_end_time .. "s]")