Modify/append existing Linux bash shell script to autoconnect to WiFi

Modify existing Linux bash shell script (Debian/Raspbian –Raspberry Pi) that will do the following 1. Scan WiFi’s (done) 2. Collect the following information SSID (done) Strength (done) Closed /Open (done) Encryption type (WEP/WPA/WPA2) Authentication (no/ TKIP /AES) 3. Send information as POST parameters to URL (done) 4. Get information from URL about SSID /Encryption type /Authentication (I can do this) 5. Use received information to connect to specified SSID (it will come in form of cleartext with needed parameters, but these parameters should first be uplaoded) Requirements: 1. It is a headless script – there is no GUI, everything has to be command line 2. I suggest using wicd-cli (or if this can be achieved other way – also fine) 3. The connection should happen without reboot (restart wpa_supplicant or restart networking should be fine) 4. If connection is dropped – automatically reconnect 5. If different SSID /password specified- connect to the new SSID