function mscript_get_mscript() 
    lua_engine = getLuaEngine()
    script_table_lua_engine = MainForm.frmLuaTableScript.getControl(1).getControl(0)
    if(lua_engine ~= nil and script_table_lua_engine.focused() ~= true) then
        return getLuaEngine().mScript
    else if (script_table_lua_engine.focused()) then
            return script_table_lua_engine
        end
    end
end

---@param line_number number|nil optional: what line to get, if none provided gets current line
---@returns string
function mscript_get_line(line_number)
    local m = mscript_get_mscript()
    if line_number == nil then line_number = m.CaretY end
    line_number = line_number - 1 -- to get the line number as show to the left
    if line_number < 0 then line_number = 0 end
    if line_number > m.Lines.Count - 1 then line_number = m.Lines.Count - 1 end
    return m.Lines.getString(line_number)
end


---returns {start, number}
---@returns number, number
function mscript_get_start_and_end_of_current_line()
    local m = mscript_get_mscript()
    local line_start = m.SelStart - m.CaretX + 1
    local line_end   = line_start + string.len(mscript_get_line())
    return line_start, line_end
end

local previous_mscript_options = {}
function mscript_disable_moving_between_selection_edges()
    local m = mscript_get_mscript()
    m.Options2 = previous_mscript_options
end

function mscript_enable_moving_between_selection_edges()
    local m = mscript_get_mscript()
    local options = {}
    previous_mscript_options = m.Options2
    -- Preserve other options.
    for name in m.Options2:gmatch("[%w_]+") do
        if name ~= "eoCaretSkipsSelection"
            and name ~= "eoCaretMoveEndsSelection"
        then
            options[#options + 1] = name
        end
    end

    options[#options + 1] = "eoCaretSkipsSelection"

    if keep_selection ~= nil then
        options[#options + 1] = "eoCaretMoveEndsSelection"
    end

    setProperty(m, "Options2", "[" .. table.concat(options, ",") .. "]")
end

mscript_enable_moving_between_selection_edges()

---moves caret left/right and up/down by x and y
---@param x number optional
---@param y number optional
---@return number, number
---returns {previous_caretX, previous_caretY}, {new_caretX, new_caretY}
function mscript_move_caret(x, y)
    local m = mscript_get_mscript()
    local prev_pos = {m.CaretX, m.CaretY}
    if x ~= nil and x ~= 0 and math.abs(m.CaretX + x) >= 0 then m.CaretX = m.CaretX + x end
    if y ~= nil and y ~= 0 and math.abs(m.CaretY + y) >= 0 then m.CaretY = m.CaretY + y end
    local new_pos = {m.CaretX, m.CaretY}
    return prev_pos, new_pos
end

function mscript_comment_line()
    local m = mscript_get_mscript()
    local str = mscript_get_line()
    local y = m.CaretY - 1
    if y == nil or str == nil then return end

    local new_str = '-- '..str
    local i, j = string.find(str, "^%s*%-%- ")
    if (i ~= nil) then
        new_str = string.gsub(str, "^(%s*)%-%- ", "%1", 1)
    end
    m.Lines.setString(y, new_str)
    mscript_move_caret(0, 1)
end

---@param direction string : "up" or "down"
function mscript_duplicate_line(direction)
    local m = mscript_get_mscript()
    
    if(direction == "up" and m.CaretY-1 ~= 0) then
        m.CaretY = m.CaretY + 1
    else if (direction == "down") then
            m.CaretY = m.CaretY - 1
        end
    end
    if(m.CaretY >= m.Lines.Count) then
        m.Lines.insert(m.Lines.Count, "")
        if(direction == "down") then
            m.Lines.insert(m.Lines.Count, "")
        end
    end
    local line_start, line_end = mscript_get_start_and_end_of_current_line()
    m.Lines.insert(m.CaretY, string.sub(m.Lines.Text, line_start, line_end))
    if(direction == "down") then
        m.CaretY = m.CaretY + 1
    else
        -- m.CaretY = m.CaretY + 1
    end
end

---comment
---@param direction string : "up" or "down"
---@param line number|nil optional
function mscript_move_line(direction, line)
    local m = mscript_get_mscript()
    local str = mscript_get_line()
    local y = m.CaretY - 1
    if line ~= nil then y, str = mscript_get_line(line) end
    if y == nil or str == nil then return end
    
    if(y == 0 and direction == "up") then return end
    if(direction == "up") then w = 1 else w = -1 end
    if(y == m.Lines.Count - 1) then -- only adding two lines help
        m.Lines.insert(m.Lines.Count, "")
        m.Lines.insert(m.Lines.Count, "")
    end
    local replacee = m.Lines.getString(y - w)
    m.Lines.delete(y-w)
    m.Lines.insert(y, replacee)
    mscript_move_caret(0, -w)
end

function mscript_wrap_string(sender, char)

    local m = mscript_get_mscript()
    local current_line = mscript_get_line()
    local potentially_skippable = string.sub(current_line, m.CaretX, m.CaretX)

    if string.find(char, "[%)%}%\"%'%]]") ~= nil and potentially_skippable == char then
        mscript_move_caret(1)
        return false
    end

    local _, i = string.find(char, "[%(%{%\"%'%[]")
    if i == nil then
        return char
    end

	if (string.len(m.SelText) > 1) then
        local sel_start = m.SelStart
        local sel_end = m.SelEnd
        if(char == '(') then m.SelText = '('..m.SelText..')' end
        if(char == '[') then m.SelText = '['..m.SelText..']' end
        if(char == '{') then m.SelText = '{'..m.SelText..'}' end
        if(char == '"') then m.SelText = '"'..m.SelText..'"' end
        if(char == "'") then m.SelText = "'"..m.SelText.."'" end
        m.SelStart = sel_start + 1
        m.SelEnd = sel_end + 1
        m.CaretX = m.CaretX + string.len(m.SelText)
        return false 

	else
		if(char == '(') then m.SelText = '()' end
		if(char == '[') then m.SelText = '[]' end
		if(char == '{') then m.SelText = '{}' end
		if(char == '"') then m.SelText = '""' end
		if(char == "'") then m.SelText = "''" end
        mscript_move_caret(-1)
    end 
end

---converts shortcuts in number form to string and vice versa
---@param shortcut string|number
---@returns string|number
function mscript_convert_shortcut(shortcut)
    local ALT   = 32768
    local CTRL  = 16384
    local SHIFT =  8192
    if (type(shortcut) == "number") then
        local converted = ""
        if(shortcut >= CTRL) then
            converted = "CTRL+"..converted
            shortcut = shortcut - CTRL
        end
        if(shortcut >= ALT) then
            converted = "ALT+"..converted
            shortcut = shortcut - ALT
        end
        if(shortcut >= SHIFT) then
            converted = "SHIFT+"..converted
            shortcut = shortcut - SHIFT
        end
        local key = shortcut
        local out = string.format("%c", shortcut)
        if(key == VK_SPACE ) then out = "VK_SPACE " goto early_exit end
        if(key == VK_INSERT) then out = "VK_INSERT" goto early_exit end
        if(key == VK_DELETE) then out = "VK_DELETE" goto early_exit end
        if(key == VK_LEFT  ) then out = "VK_LEFT  " goto early_exit end
        if(key == VK_RIGHT ) then out = "VK_RIGHT " goto early_exit end
        if(key == VK_UP    ) then out = "VK_UP    " goto early_exit end
        if(key == VK_DOWN  ) then out = "VK_DOWN  " goto early_exit end
        if(key == VK_TAB   ) then out = "VK_TAB   " goto early_exit end
        if(key == VK_DIVIDE) then out = "VK_DIVIDE" goto early_exit end
        if(key == VK_ESCAPE) then out = "VK_ESCAPE" goto early_exit end
        if(key == VK_HOME  ) then out = "VK_HOME  " goto early_exit end
        if(key == VK_RETURN) then out = "VK_RETURN" goto early_exit end
        ::early_exit::
        return converted..out
    end
    if (type(shortcut) == "string") then
        local converted = 0
        if(string.match(shortcut, "CTRL+")) then
            converted = CTRL + converted
            --shortcut = shortcut - CTRL
        end
        if(string.match(shortcut, "ALT+")) then
            converted = ALT + converted
            --shortcut = shortcut - ALT
        end
        if(string.match(shortcut, "SHIFT+")) then
            converted = SHIFT + converted
            --shortcut = shortcut - SHIFT
        end
        return converted + string.byte(string.reverse(shortcut))
    end
end

--   default functions and keybindinds provided by cheat engine's mscript
--   idx cmdid  command                shortcut
--    0 |   3 : ecUp                 - Up
--    1 | 103 : ecSelUp              - Shift+Up
--    2 | 211 : ecScrollUp           - Ctrl+Up
--    3 |   4 : ecDown               - Down
--    4 | 104 : ecSelDown            - Shift+Down
--    5 | 212 : ecScrollDown         - Ctrl+Down
--    6 |   1 : ecLeft               - Left
--    7 | 101 : ecSelLeft            - Shift+Left
--    8 |   5 : ecWordLeft           - Ctrl+Left
--    9 | 105 : ecSelWordLeft        - Shift+Ctrl+Left
--   10 |   2 : ecRight              - Right
--   11 | 102 : ecSelRight           - Shift+Right
--   12 |   6 : ecWordRight          - Ctrl+Right
--   13 | 106 : ecSelWordRight       - Shift+Ctrl+Right
--   14 |  10 : ecPageDown           - PgDn
--   15 | 110 : ecSelPageDown        - Shift+PgDn
--   16 |  14 : ecPageBottom         - Ctrl+PgDn
--   17 | 114 : ecSelPageBottom      - Shift+Ctrl+PgDn
--   18 |   9 : ecPageUp             - PgUp
--   19 | 109 : ecSelPageUp          - Shift+PgUp
--   20 |  13 : ecPageTop            - Ctrl+PgUp
--   21 | 113 : ecSelPageTop         - Shift+Ctrl+PgUp
--   22 |   7 : ecLineStart          - Home
--   23 | 107 : ecSelLineStart       - Shift+Home
--   24 |  15 : ecEditorTop          - Ctrl+Home
--   25 | 115 : ecSelEditorTop       - Shift+Ctrl+Home
--   26 |   8 : ecLineEnd            - End
--   27 | 108 : ecSelLineEnd         - Shift+End
--   28 |  16 : ecEditorBottom       - Ctrl+End
--   29 | 116 : ecSelEditorBottom    - Shift+Ctrl+End
--   30 | 223 : ecToggleMode         - Ins
--   31 | 201 : ecCopy               - Ctrl+Ins
--   32 | 604 : ecPaste              - Shift+Ins
--   33 | 502 : ecDeleteChar         - Del
--   34 | 603 : ecCut                - Shift+Del
--   35 | 501 : ecDeleteLastChar     - BkSp
--   36 | 501 : ecDeleteLastChar     - Shift+BkSp
--   37 | 504 : ecDeleteLastWord     - Ctrl+BkSp
--   38 | 601 : ecUndo               - Alt+BkSp
--   39 | 602 : ecRedo               - Shift+Alt+BkSp
--   40 | 509 : ecLineBreak          - Enter
--   41 | 199 : ecSelectAll          - Ctrl+A
--   42 | 201 : ecCopy               - Ctrl+C
--   43 | 615 : ecBlockIndent        - Shift+Ctrl+I
--   44 | 509 : ecLineBreak          - Ctrl+M
--   45 | 510 : ecInsertLine         - Ctrl+N
--   46 | 503 : ecDeleteWord         - Ctrl+T
--   47 | 616 : ecBlockUnindent      - Shift+Ctrl+U
--   48 | 604 : ecPaste              - Ctrl+V
--   49 | 603 : ecCut                - Ctrl+X
--   50 | 507 : ecDeleteLine         - Ctrl+Y
--   51 | 506 : ecDeleteEOL          - Shift+Ctrl+Y
--   52 | 601 : ecUndo               - Ctrl+Z
--   53 | 602 : ecRedo               - Shift+Ctrl+Z
--   54 | 301 : ecGotoMarker0        - Ctrl+0
--   55 | 302 : ecGotoMarker1        - Ctrl+1
--   56 | 303 : ecGotoMarker2        - Ctrl+2
--   57 | 304 : ecGotoMarker3        - Ctrl+3
--   58 | 305 : ecGotoMarker4        - Ctrl+4
--   59 | 306 : ecGotoMarker5        - Ctrl+5
--   60 | 307 : ecGotoMarker6        - Ctrl+6
--   61 | 308 : ecGotoMarker7        - Ctrl+7
--   62 | 309 : ecGotoMarker8        - Ctrl+8
--   63 | 310 : ecGotoMarker9        - Ctrl+9
--   64 | 351 : ecSetMarker0         - Shift+Ctrl+0
--   65 | 352 : ecSetMarker1         - Shift+Ctrl+1
--   66 | 353 : ecSetMarker2         - Shift+Ctrl+2
--   67 | 354 : ecSetMarker3         - Shift+Ctrl+3
--   68 | 355 : ecSetMarker4         - Shift+Ctrl+4
--   69 | 356 : ecSetMarker5         - Shift+Ctrl+5
--   70 | 357 : ecSetMarker6         - Shift+Ctrl+6
--   71 | 358 : ecSetMarker7         - Shift+Ctrl+7
--   72 | 359 : ecSetMarker8         - Shift+Ctrl+8
--   73 | 360 : ecSetMarker9         - Shift+Ctrl+9
--   74 | 371 : EcFoldLevel1         - Shift+Alt+1
--   75 | 372 : EcFoldLevel2         - Shift+Alt+2
--   76 | 371 : EcFoldLevel1         - Shift+Alt+3
--   77 | 371 : EcFoldLevel1         - Shift+Alt+4
--   78 | 371 : EcFoldLevel1         - Shift+Alt+5
--   79 | 376 : EcFoldLevel6         - Shift+Alt+6
--   80 | 377 : EcFoldLevel7         - Shift+Alt+7
--   81 | 378 : EcFoldLevel8         - Shift+Alt+8
--   82 | 379 : EcFoldLevel9         - Shift+Alt+9
--   83 | 380 : EcFoldLevel0         - Shift+Alt+0
--   84 | 381 : EcFoldCurrent        - Shift+Alt+Ins
--   85 | 382 : EcUnFoldCurrent      - Shift+Alt+Execute
--   86 | 383 : EcToggleMarkupWord   - Alt+M
--   87 | 231 : ecNormalSelect       - Shift+Ctrl+N
--   88 | 232 : ecColumnSelect       - Shift+Ctrl+C
--   89 | 233 : ecLineSelect         - Shift+Ctrl+L
--   90 | 617 : ecTab                - Tab
--   91 | 618 : ecShiftTab           - Shift+Tab
--   92 | 250 : ecMatchBracket       - Shift+Ctrl+B
--   93 | 153 : ecColSelUp           - Shift+Alt+Up
--   94 | 154 : ecColSelDown         - Shift+Alt+Down
--   95 | 151 : ecColSelLeft         - Shift+Alt+Left
--   96 | 152 : ecColSelRight        - Shift+Alt+Right
--   97 | 160 : ecColSelPageDown     - Shift+Alt+PgDn
--   98 | 164 : ecColSelPageBottom   - Shift+Ctrl+Alt+PgDn
--   99 | 159 : ecColSelPageUp       - Shift+Alt+PgUp
--  100 | 163 : ecColSelPageTop      - Shift+Ctrl+Alt+PgUp
--  101 | 157 : ecColSelLineStart    - Shift+Alt+Home
--  102 | 158 : ecColSelLineEnd      - Shift+Alt+End
--  103 | 165 : ecColSelEditorTop    - Shift+Ctrl+Alt+Home
--  104 | 166 : ecColSelEditorBottom - Shift+Ctrl+Alt+End

do
    local lua_engine = getLuaEngine()
    local ALT   = 32768
    local CTRL  = 16384
    local SHIFT =  8192
    local LEFT_BRACE = 0xDD
    local RIGHT_BRACE = 0xDB

    lua_engine.scLuaCompleter.LinesInWindow = 20 --lua_engine autocompletion menu 
    lua_engine.scLuaCompleter.Width = 500 --lua_engine autocompletion width 
    lua_engine.scLuaCompleter.CaseSensitive = false
    
    lua_engine.mScript.onKeyPress = mscript_wrap_string
    lua_engine.mScript.Keystrokes.Items[22].ShortCut = CTRL + ALT + VK_LEFT -- go to line start
    lua_engine.mScript.Keystrokes.Items[23].ShortCut = CTRL + ALT + SHIFT + VK_LEFT -- select to line start
    lua_engine.mScript.Keystrokes.Items[26].ShortCut = CTRL + ALT + VK_RIGHT -- go to line end
    lua_engine.mScript.Keystrokes.Items[27].ShortCut = CTRL + ALT + SHIFT + VK_RIGHT -- select to line end
    lua_engine.mScript.Keystrokes.Items[43].ShortCut = CTRL + LEFT_BRACE -- indent 
    lua_engine.mScript.Keystrokes.Items[47].ShortCut = CTRL + RIGHT_BRACE -- unindent
    lua_engine.mScript.Keystrokes.Items[50].ShortCut = CTRL + SHIFT + VK_D -- delete whole line 
    lua_engine.mScript.Keystrokes.Items[53].ShortCut = ALT + VK_Z -- undo 
    -- mscript_engine.mScript.Keystrokes.Items[93].ShortCut = CTRL + ALT + VK_UP -- put caret above   doesnt work, collides with ctrl+alt shortcuts
    -- mscript_engine.mScript.Keystrokes.Items[94].ShortCut = CTRL + ALT + VK_DOWN -- put caret below doesnt work, collides with ctrl+alt shortcuts
    
    -- i also care about script table's lua window
    local script_table_lua_engine = MainForm.frmLuaTableScript.getControl(1).getControl(0)
    local lua_engine_shortcuts = lua_engine.mScript.Keystrokes.Items
    script_table_lua_engine.Keystrokes.Items[22].ShortCut = lua_engine_shortcuts[22].ShortCut
    script_table_lua_engine.Keystrokes.Items[23].ShortCut = lua_engine_shortcuts[23].ShortCut
    script_table_lua_engine.Keystrokes.Items[26].ShortCut = lua_engine_shortcuts[26].ShortCut
    script_table_lua_engine.Keystrokes.Items[27].ShortCut = lua_engine_shortcuts[27].ShortCut
    script_table_lua_engine.Keystrokes.Items[43].ShortCut = lua_engine_shortcuts[43].ShortCut
    script_table_lua_engine.Keystrokes.Items[47].ShortCut = lua_engine_shortcuts[47].ShortCut
    script_table_lua_engine.Keystrokes.Items[50].ShortCut = lua_engine_shortcuts[50].ShortCut
    script_table_lua_engine.Keystrokes.Items[53].ShortCut = lua_engine_shortcuts[53].ShortCut
    script_table_lua_engine.onKeyPress = lua_engine.mScript.onKeyPress

end

createHotkey(getLuaEngine().btnExecute.doClick, {VK_CONTROL, VK_0})
createHotkey(function() mscript_comment_line()         end, {VK_CONTROL, VK_OEM2})
createHotkey(function() mscript_move_line("up")        end, {VK_MENU, VK_UP})
createHotkey(function() mscript_move_line("down")      end, {VK_MENU, VK_DOWN})
createHotkey(function() mscript_duplicate_line("up")   end, {VK_SHIFT, VK_MENU, VK_UP})
createHotkey(function() mscript_duplicate_line("down") end, {VK_SHIFT, VK_MENU, VK_DOWN})