--[[
@module  httpsrv_start
@summary Air780EPM HTTP服务器应用模块
@version 1.0
@date    2025.10.24
@author  拓毅恒
@usage
本文件为Air780EPM开发板演示 HTTP 服务器功能的应用模块，核心业务逻辑为：
1. 初始化HTTP服务器
2. 配置HTTP服务器参数
3. 启动HTTP服务器服务
4. 处理HTTP请求和响应
]]

local function handle_http_request(fd, method, uri, headers, body)
    log.info("httpsrv", method, uri, body or "")
    
    if uri == "/send/text" then
        log.info("Text Request", "Method:", method, "Body Length:", body and #body or 0)
        if method == "POST" and body and #body > 0 then
            -- 直接打印接收到的文本内容
            log.info("Received Text:", body)
            return 200, {}, "ok"
        end
        return 400, {}, "Invalid request"
    elseif uri == "/scan/go" then
        wlan.scan()
        return 200, {}, "ok"
    elseif uri == "/scan/list" then
        return 200, {["Content-Type"]="application/json"}, (json.encode({data=scan_result, ok=true}))
    elseif uri == "/connect" then
        if method == "POST" and body and #body > 2 then
            local jdata = json.decode(body)
            if jdata and jdata.ssid then
                sys.timerStart(wlan.connect, 500, jdata.ssid, jdata.passwd)
                return 200, {}, "ok"
            end
        end
        return 400, {}, "ok"
    elseif uri == "/connok" then
        log.info("connok", json.encode({ip=socket.localIP(2)}))
        return 200, {["Content-Type"]="application/json"}, json.encode({ip=socket.localIP(2)})
    end
    return 404, {}, "Not Found" .. uri
end

local function start_http_server()
    -- 等待网络就绪事件
    sys.waitUntil("CREATE_OK")
    
    local local_ip = socket.localIP(socket.LWIP_ETH)
    
    -- 启动HTTP服务器
    httpsrv.start(80, handle_http_request, socket.LWIP_ETH)
    log.info("HTTP", "文件服务器已启动，使用AirETH_1000-以太网模式")
    log.info("HTTP", "访问地址: http://" .. (local_ip or "192.168.4.1"))
end

local function scan_done_handle()
    local result = wlan.scanResult()
    scan_result = {}
    for k, v in pairs(result) do
        log.info("scan", (v["ssid"] and #v["ssid"] > 0) and v["ssid"] or "[隐藏SSID]", v["rssi"], (v["bssid"]:toHex()))
        if v["ssid"] and #v["ssid"] > 0 then
            table.insert(scan_result, {
                ssid = v["ssid"],
                rssi = v["rssi"]
            })
        end
    end
    log.info("scan", "aplist count:", #scan_result)
end

-- 订阅WiFi扫描完成事件
sys.subscribe("WLAN_SCAN_DONE", scan_done_handle)

sys.taskInit(start_http_server)