import curses

class VimView:
    def __init__(self) -> None:
        self.curses_adapter = CursesAdapter()

    def Render(self, 
               displayBuffer: list[list[str]],
               currentLine: int, currentCol: int,
               scrollX: int, scrollY: int,
               file_path: str):
        """Отрисовка текущего состояния"""

        self.curses_adapter.screen.clear()

        # display visible part of text
        for i in range(self.curses_adapter.lines - 1):
            if i + scrollY < len(displayBuffer):
                line = ''.join(displayBuffer[i + scrollY])
                if scrollX < len(line):
                    self.curses_adapter.SetString(i, 0, line[scrollX:scrollX + self.curses_adapter.cols])
                else:
                    self.curses_adapter.SetString(i, 0, '')
            else:
                self.curses_adapter.SetString(i, 0, '')

        # update mode bar
        self.EditModeBar(currentLine, len(displayBuffer), file_path)
        # update cursor
        self.curses_adapter.SetCursor(currentLine - scrollY, currentCol - scrollX)
        self.curses_adapter.Refresh()

    def EditModeBar(self, currentLine, totalLines, fileName):
        """Print edit mode information panel"""
        self.curses_adapter.screen.addstr(self.curses_adapter.lines - 1, 0, ' ' * (self.curses_adapter.cols - 1))  # Очистка строки
        self.curses_adapter.screen.addstr(self.curses_adapter.lines - 1, 0, "FILE: ")
        self.curses_adapter.screen.addstr(fileName, curses.color_pair(1))  # Имя файла
        self.curses_adapter.screen.addstr(" | MODE:")
        self.curses_adapter.screen.addstr(" EDIT", curses.color_pair(1))
        self.curses_adapter.screen.addstr(" | LINE: ")
        self.curses_adapter.screen.addstr(str(currentLine + 1), curses.color_pair(1))
        self.curses_adapter.screen.addstr("/")
        self.curses_adapter.screen.addstr(str(totalLines), curses.color_pair(1))  # Общее количество строк

class CursesAdapter:
    def __init__(self) -> None:
        self.KEY_LEFT = curses.KEY_LEFT
        self.KEY_RIGHT = curses.KEY_RIGHT
        self.KEY_UP = curses.KEY_UP
        self.KEY_DOWN = curses.KEY_DOWN
        self.KEY_BACKSPACE_1 = 127
        self.KEY_BACKSPACE_2 = 8
        self.KEY_ENTER = 10
        self.KEY_CTRL_S = 19
        self.KEY_ESCAPE = 27


        self.screen = curses.initscr()
        self.screen.keypad(True)
        self.cols = curses.COLS
        self.lines = curses.LINES
        # init color system
        curses.start_color()
        # green color pair
        curses.init_pair(1, curses.COLOR_MAGENTA, curses.COLOR_BLACK)
        curses.curs_set(1)  # Make cursor visible

    def Refresh(self) -> None:
        """Apply changes"""
        self.screen.refresh()

    def Cleanup(self) -> None:
        curses.endwin()

    def SetCursor(self, x: int, y: int):
        """set cursor position (x, y)"""
        self.screen.move(x, y)

    def SetChar(self, x: int, y: int, code: int):
        """set char position (x, y)"""
        self.screen.addch(x, y, code)

    def SetString(self, x: int, y: int, data: str):
        """set string begin position (x, y)""" 
        self.screen.addstr(x, y, data)

    def GetChar(self) -> int:
        """Wait users input"""
        return self.screen.getch()