#!/usr/bin/env python
import curses
from dungeonbattle.interfaces import Map

class MapDisplay:

    def __init__(self, m: Map):
        self.map = m
        self.pad = curses.newpad(m.height, m.width)

    def update_pad(self):
        for i in range(self.map.height):
            self.pad.addstr(i, 0, self.map.tiles[i][:-1])
        for e in self.map.entities:
            self.pad.addch(e.y, e.x, e.img)

    def display(self, y, x):
        self.pad.clear()
        deltay, deltax = (curses.LINES // 2) + 1, (curses.COLS //2) + 1
        pminrow, pmincol = y-deltay, x-deltax
        sminrow, smincol = max(-pminrow, 0), max(-pmincol, 0)
        deltay, deltax = curses.LINES - deltay, curses.COLS - deltay
        smaxrow = self.map.height - (y + deltay) + curses.LINES
        smaxrow = min(smaxrow, curses.LINES-1)
        smaxcol = self.map.width - (x + deltax) + curses.COLS
        smaxcol = min(smaxcol, curses.COLS-1)
        pminrow = max(0, min(self.map.height, pminrow)) 
        pmincol = max(0, min(self.map.width, pmincol))
        self.update_pad()
        self.pad.refresh(pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol)