#!/usr/bin/lua

-- Main CGI entry point for the Skyweave API.
-- This script is intended to be deployed at /www/cgi-bin/skyweave.lua.
--
-- It assumes that:
-- 1. The skyweave framework modules (router, request, handlers, etc.)
--    are located in /usr/lib/lua/skyweave/
--    (e.g., /usr/lib/lua/skyweave/router.lua).
-- 2. The json.lua library (originally from /app/lib/json.lua) is available
--    in a standard Lua path as 'json.lua' (e.g., /usr/lib/lua/json.lua).

-- package.path is assumed to be configured correctly in the target OpenWrt environment.

local p_response_ok, response_module = pcall(require, "skyweave.response")
-- Try to load json independently for emergency_error, in case response_module loading failed or it doesn't expose json table directly.
local p_json_ok, json_for_emergency = pcall(require, "json")

local function emergency_error(message, status_code)
    status_code = status_code or 500
    print("Status: " .. status_code)
    print("Content-Type: application/json")
    print("")
    if p_json_ok then
         print(json_for_emergency.encode({ errCode = -999, errMsg = "Framework Panic: " .. message }))
    else
        -- Fallback to a very basic JSON-like string if no JSON encoder is available
        print('{"errCode": -999, "errMsg": "Framework Panic: ' .. message:gsub('[\\"]', '\%1') .. '"}')
    end
end

local success, load_result = pcall(function()
    -- response_module is already attempted to be loaded by pcall above.
    -- If p_response_ok is false, response_module is the error object.
    if not p_response_ok then
        -- If the core response module itself failed, we cannot proceed with normal operations.
        -- The error from loading response_module is in 'response_module' variable here.
        emergency_error("Core component 'skyweave.response' failed to load: " .. tostring(response_module))
        return -- Stop execution
    end

    local Router = require("skyweave.router")
    local request_context_builder = require("skyweave.request")

    local network_handlers = require("skyweave.handlers.network")
    local system_handlers = require("skyweave.handlers.system")
    local wifi_handlers = require("skyweave.handlers.wifi")

    local router = Router:new()

    router:add_route("GET", "/network_config", network_handlers.get_network_config)
    router:add_route("POST", "/connect_wifi", network_handlers.set_connect_wifi)
    router:add_route("GET", "/SOS", network_handlers.set_connect_wifi_sos)
    router:add_route("GET", "/wifi_scan", wifi_handlers.get_wifi_scan)
    router:add_route("GET", "/system_log_parsed", system_handlers.get_system_log_parsed)

    local request = request_context_builder.create_request_context()

    if not request then
        -- Use the already loaded response_module if available, otherwise the basic emergency_error
        if p_response_ok then
            response_module.error("Failed to create request context.", 500)
        else
            emergency_error("Failed to create request context.", 500)
        end
        return
    end
    router:dispatch(request)
end)

if not success then
    local error_message = "Critical error in main script execution: " .. tostring(load_result)
    -- Use the already loaded response_module if available, otherwise the basic emergency_error
    if p_response_ok then
        response_module.error(error_message, 500, -999)
    else
        emergency_error(error_message, 500)
    end
end