local JSON = require("luci.jsonc")
local test_utils = require('tests.utils')
local utils = require('lime.utils')
local ubus = require "ubus"

local uci = nil

local ubus_babel_hosts = [[{"IPv6":{"fe80::16cc:20ff:feda:4eac":{"uhello-reach":
0,"hello-reach":65535,"txcost":256,"channel":255,"if_up":true,"rxcost":256,
"dev":"wlan1-mesh_17","rtt":"0.000"},"fe80::a2f3:c1ff:fe46:2896":
{"uhello-reach":0,"hello-reach":64511,"txcost":264,"channel":255,"if_up":true,
"rxcost":264,"dev":"wlan0-mesh_17","rtt":"0.000"},"fe80::16cc:20ff:feda:4eab":
{"uhello-reach":0,"hello-reach":65535,"txcost":438,"channel":255,"if_up":true,
"rxcost":256,"dev":"wlan0-mesh_17","rtt":"0.000"},"fe80::a2f3:c1ff:fe46:2897":
{"uhello-reach":0,"hello-reach":65535,"txcost":256,"channel":255,"if_up":true,
"rxcost":256,"dev":"wlan1-mesh_17","rtt":"0.000"}},"IPv4":[]}]]

describe('Tests network_nodes #network_nodes', function()
    before_each('', function()
        stub(ubus, "call", function(arg)
            return JSON.parse(ubus_babel_hosts)
        end)

        stub(utils, "unsafe_shell", function(cmd)
            return "fe80::c24a:ff:fefc:3abd"
        end)
    end)

    it('a simple test to get babel info and assert requiered fields are present', function()
        package.path = package.path .. ";packages/shared-state-babel_links_info/files/usr/bin/?;;"
        require("shared-state-publish_babel_links_info")

        babelinfo = get_babel_links_info()
        assert.are.equal('fe80::16cc:20ff:feda:4eac', babelinfo[1].dst_ip)
        assert.are.equal("wlan1-mesh_17",babelinfo[1].iface)
        assert.are.equal("fe80::c24a:ff:fefc:3abd",babelinfo[1].src_ip)
    end)
end)

describe('Test get interface local ipv6', function()
    before_each('', function()
        local ifaces = {'lo', 'eth0-1_250', 'bat0', 'anygw'}
        unsafe_shell_calls =0
        stub(utils, "get_ifnames", function () return ifaces end)

        --this function returns an output similar to the command invoked in get_interface_ip
        stub(utils, "unsafe_shell", function (cmd) 
            unsafe_shell_calls=unsafe_shell_calls+1
            if string.match(cmd, 'lo') then 
                --the loopback interface tipically dont have an ipv6 ip
                return ""
            end
            if string.match(cmd, 'eth0%-1_250') then
                return "fe80::db:d6ff:fefc:3abd"
            end
            if string.match(cmd, 'bat0') then 
                --the bat0 interface may not have an ipv6 ip
                return ""
            end
            if string.match(cmd, 'anygw') then 
                return "fe80::a8aa:aaff:feea:d2aa"
            end
            return "not expected command: ".. cmd
        end)
        
    end)
    it('a simple test to get get interface local ipv6 address', function()
        local unsafe_shell_spy = spy.on(utils, "unsafe_shell")
        ifs = utils.get_ifnames()
        
        assert.are.equal("",get_interface_ip(ifs[1]))
        assert.are.equal("fe80::db:d6ff:fefc:3abd",get_interface_ip(ifs[2]))
        assert.are.equal("",get_interface_ip(ifs[3]))
        assert.are.equal("fe80::a8aa:aaff:feea:d2aa",get_interface_ip(ifs[4]))
        assert.are.equal("fe80::a8aa:aaff:feea:d2aa",get_interface_ip(ifs[4]))
        assert.are.equal("fe80::a8aa:aaff:feea:d2aa",get_interface_ip(ifs[4]))
        --cached values shoud be used instead of making the os call
        assert.spy(unsafe_shell_spy).was.called(4)
    end)
end)