-- -- Open clipboard inserter
-- -- Wait for unknown word and add it to anki through yomichan
-- -- Select all the subtitle lines to add to the card.
-- -- Ctrl + c [make sure it copies with paragraphs included, otherwise it wont work]
-- -- Change back to MPV and Ctrl + v
-- -- Done. The lines, their respective Audio and the current paused image
-- will be added to the back of the card

local utils = require 'mp.utils'
local msg = require 'mp.msg'
local subs = {}

-- User Config
local BACK_FIELD = "Back"
local FRONT_FIELD = "Front"
local prefix = os.getenv("HOME") .. '/.local/share/Anki2/User 1/collection.media/'

 function trim(s)
   return string.gsub(s, "^%s*(.-)%s*$", "%1")
 end

 function get_name(s, e)
    return  mp.get_property("filename"):gsub('%W','').. tostring(s) .. tostring(e)
 end

 function clip(text)
    os.execute("echo \"" .. text .. "\" | xclip -selection clipboard &")
 end

 function create_audio(s, e)

     if s == nil or e == nil then
         return
     end

     local t = tostring(e - s)
     local source = mp.get_property("path")
     local destination = prefix .. get_name(s, e) .. '.mp3'
     local cmd = "ffmpeg -y -i \"" .. source .. "\" -ss " .. tostring(s)
         .. " -t " .. t .. " -q:a 0 -map a \"".. destination.. "\" 2> /dev/null &"
     os.execute(cmd)
 end

 function get_clipboard()
     local command = 'xclip -o'
     local handle = io.popen(command)
     local result = handle:read("*a")
     handle:close()
     return result
 end


 function set_clipboard(name, sub)
     if sub and mp.get_property_number('sub-start') then
         local sub_delay = mp.get_property_native("sub-delay")
         clip(sub)
         subs[sub] = { mp.get_property_number('sub-start') + sub_delay, mp.get_property_number('sub-end') + sub_delay }
     end
 end


 function create_screenshot(s, e)
    local img = prefix .. get_name(s,e) .. '.jpg'
    mp.commandv("raw", "no-osd", "screenshot-to-file", img)
    os.execute("mogrify -resize 640x480 -quality 50 -format jpg \"" .. img .."\"")
 end

 function get_extract()
    local lines = get_clipboard()
    local e = 0
    local s = 0
     for line in lines:gmatch("([^\n]*)\n?") do
     line = trim(line)
     if subs[line]~= nil then
            msg.info(lines)
        if subs[line][1] ~= nil and subs[line][2] ~= nil then
                msg.info(lines)
          if s == 0 then
            s = subs[line][1]
          else
            s = math.min(s, subs[line][1])
          end
          e = math.max(e, subs[line][2])
        end
     end
     end
    if e ~= 0 then
        local ifield = create_screenshot(s, e)
        local afield = create_audio(s, e)
        local tfield = "<center><p>".. string.gsub(string.gsub(lines,"\n", "<p>"), "\r", "")
        ifield = '<p><img src=\"'.. get_name(s,e) ..'.jpg\">'
        afield = "<p>[sound:".. get_name(s,e) .. ".mp3]</center>"
        local field = tfield .. ifield.. afield
        add_to_last_added(field)
    end
 end

function get(request)
    local args = {
        "curl",
        "localhost:8765",
        "-X",
        "GET",
        "-d",
        request
    }

    local result =
      utils.subprocess(
      {
        args = args,
        cancellable = true
      }
    )

    return utils.parse_json(result.stdout)
end

function add_to_last_added(fields)
    local noteid = math.max(unpack(get('{"action": "findNotes", "params": {"query": "added:1"}, "version": 6}')["result"]))
    local note = get('{"action": "notesInfo", "params": {"notes": ['.. noteid.. ']}, "version": 6}')

    if note ~= nil then
        local back = note["result"][1]["fields"][BACK_FIELD]["value"]
        back = string.gsub(back .. fields, "\"", "\\\"")
        get('{"action": "updateNoteFields", "version": 6, "params": {"note": {"id": ' .. noteid.. ', "fields": { "'.. BACK_FIELD..'": "'.. back .. '" } } } }')

        mp.osd_message("Updated note: " .. note["result"][1]["fields"][FRONT_FIELD]["value"], 3)
        msg.info("Updated note: " .. note["result"][1]["fields"][FRONT_FIELD]["value"])
    end
end

function ex()
	pcall(get_extract)
end

mp.observe_property("sub-text", 'string', set_clipboard)
mp.add_key_binding("ctrl+v", ex)