from common import *
from random import random, choice

class Enemy:
    def __init__(self, text, x, y):
        self.x = x
        self.y = y
        self.text = text
        self.matched = 0

    def draw(self):
        txt = font.render(self.text[0:self.matched], True, (255, 0, 0))
        txtRest = font.render(self.text[self.matched:], True, (255, 255, 255))

        width = txt.get_width() + txtRest.get_width()
        screen.blit(txt, (self.x - width / 2, self.y))
        screen.blit(txtRest, (self.x - width / 2 + txt.get_width(), self.y))

    def update(self, tick):
        if self.text:
            self.y += 1 / len(self.text)
        else:
            self.y += 1
        
        if self.y > height:
            objects.remove(self)

    def typed(self, key):
        if not self.text:
            return

        if self.text[self.matched] != key:
            self.matched = 0
        if self.text[self.matched] == key:
            self.matched += 1

        if self.matched == len(self.text):
            self.text = ""
            shoot(self, self.x, self.y)
            return True

    def hit(self):
        objects.remove(self)
        explode(self.x, self.y, (255, 0, 0), 30)

class Fighter(Enemy):
    def __init__(self, text, x, y):
        super().__init__(text, x, y)

    def draw(self):
        if self.y < 0:
            return

        super().draw()
        pygame.draw.lines(screen, (0, 255, 0), True,
                ((self.x, self.y),
                 (self.x + 10, self.y - 20),
                 (self.x - 10, self.y - 20),
                ))

class Shot(Enemy):
    def __init__(self, text, x, y, dx, dy):
        super().__init__(text, x, y)
        self.dx = dx
        self.dy = dy
        self.v = sqrt(self.dx * self.dx + self.dy * self.dy)
    
    def update(self, tick):
        self.x += self.dx
        self.y += self.dy

        px = playerX - self.x
        py = playerY - self.y
        pv = sqrt(px * px + py * py)

        if pv < 20:
            objects.remove(self)

        self.dx = 0.95 * self.dx + 0.05 * px / pv * self.v
        self.dy = 0.95 * self.dy + 0.05 * py / pv * self.v
        
        if self.y > height:
            objects.remove(self)

    def draw(self):
        super().draw()
        pygame.draw.lines(screen, (255, 255, 0), True,
                ((self.x - 5, self.y),
                 (self.x + 5, self.y),
                 (self.x, self.y - 5),
                 (self.x, self.y + 5)
                ))


class Shooter(Enemy):
    def __init__(self, text, x, y, shots):
        super().__init__(text, x, y)
        self.shots = shots

    def draw(self):
        if self.y < 0:
            return

        super().draw()
        pygame.draw.lines(screen, (0, 255, 0), True,
                ((self.x, self.y),
                 (self.x + 10, self.y - 20),
                 (self.x + 4, self.y - 20),
                 (self.x, self.y),
                 (self.x - 4, self.y - 20),
                 (self.x - 10, self.y - 20),
                ))

    def update(self, tick):
        super().update(tick)
        if tick % 200 == 49:
            objects.append(Shot(choice(self.shots), self.x, self.y, -2 + random() * 4, -2 + random() * 4))

class Boss(Enemy):
    def __init__(self, text, x, y):
        super().__init__(text, x, y)

    def draw(self):
        if self.y < 0:
            return

        super().draw()
        pygame.draw.lines(screen, (0, 255, 0), True,
                ((self.x - 20, self.y - 20),
                 (self.x - 10, self.y),
                 (self.x     , self.y - 20),
                 (self.x + 10, self.y),
                 (self.x + 20, self.y - 20),
                ))