local nk = require("nakama")

local utils = {}

utils.ADMIN_ROLES = { ["admin"] = true, ["moderator"] = true, ["owner"] = true }

function utils.is_admin(context)
    if not context.user_id then return false end
    
    local status, account = pcall(nk.account_get_id, context.user_id)
    if not status or not account then return false end
    
    local metadata = {}
    if type(account.user.metadata) == "string" then
        status, metadata = pcall(nk.json_decode, account.user.metadata)
        if not status then metadata = {} end
    else
        metadata = account.user.metadata or {}
    end
    
    local role = metadata.role or ""
    return utils.ADMIN_ROLES[role] == true
end

function utils.is_match_host(context, match_id)
    if not context.user_id or not match_id then return false end
    local status, match = pcall(nk.match_get, match_id)
    if not status or not match then return false end

    -- Needs to decode match.state if you're using authoritative matches
    -- Simplified for lua translation:
    local state = {}
    if match.state then
        status, state = pcall(nk.json_decode, match.state)
        if not status then state = {} end
    end
    return state.hostUserId == context.user_id
end

function utils.require_admin(context)
    if not utils.is_admin(context) then
        error("Admin privileges required")
    end
end

function utils.require_admin_or_host(context, match_id)
    if not utils.is_admin(context) and not utils.is_match_host(context, match_id) then
        error("Admin or host privileges required")
    end
end

return utils