#!/usr/bin/env lua5.3

-- needs xsel, clipnotify
-- needs luaposix, luarocks-5.3 install --local luaposix
-- cat .clip_history | dmenu -l 10 | xsel -ib
local function default_luarocks_modules()
    local luarocks_handle = io.popen("luarocks-5.3 path --bin")
    local path_b = false
    local cpath_b = false
    for line in luarocks_handle:lines() do
        local path = string.match(line, "LUA_PATH%s*=%s*('.+')")
        local cpath = string.match(line, "LUA_CPATH%s*=%s*('.+')")
        if path ~= nil then
            package.path = package.path .. ";" .. string.sub(path, 2, -2)
        end
        if cpath ~= nil then
            package.cpath = package.cpath .. ";" .. string.sub(cpath, 2, -2)
        end
    end

    if path_b then os.exit(1) end
    if cpath_b then os.exit(1) end
end
default_luarocks_modules()

local string = require("string")
-- local signal = require("posix.signal")

-- signal.signal(signal.SIGINT, function(signum) os.exit(128 + signum) end)

-- FIXME-clip history size is not being used
local function loop()
    local clip_hist_size = 100
    local clip_hist = "/home/devi/.clip_history"

    local matched = false
    while true do
        local wait_for_event = io.popen("clipnotify")

        local handle = io.popen("xsel -ob")
        local last_clip_entry = handle:read("*a")
        local hist_file = io.open(clip_hist, "a+")

        for line in hist_file:lines() do
            if (string.sub(line, 0, string.len(line)) == last_clip_entry) then
                matched = true
            end
        end
        if matched ~= true then hist_file:write(last_clip_entry .. "\n") end
        matched = false
        hist_file:close()
        wait_for_event:close()
        handle:close()
    end
end

loop()