"""
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ 
┃ Dino Game using Micropython with Raspberry Pi Pico         ┃
┃                                                            ┃
┃ Building a Dino game using MicroPython on an SSD1306 OLED  ┃
┃ display involves setting up the hardware,initializing the  ┃
┃ display and button, and writing the game logic.            ┃
┃                                                            ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
"""

from machine import Pin, I2C  # 匯入控制腳位與I2C通訊的模組
import ssd1306               # OLED顯示器驅動模組
import time                  # 時間模組，用來延遲

# 初始化I2C通訊，SCL接GPIO 27，SDA接GPIO 26
i2c = I2C(1, scl=Pin(27), sda=Pin(26))

# 初始化OLED顯示器，解析度128x64，使用剛剛設定的I2C通訊
display = ssd1306.SSD1306_I2C(128, 64, i2c)

# 設定按鈕腳位22，輸入模式，啟用內部上拉電阻(按鈕沒按時腳位為高)
jump_button = Pin(22, Pin.IN, Pin.PULL_UP)

# 恐龍初始X座標(固定)
dino_x = 10
# 恐龍初始Y座標(站在地面)
dino_y = 60
# 恐龍身體寬度和高度
dino_width = 12
dino_height = 6
# 恐龍垂直速度(跳躍用)
dino_velocity = 0
# 是否正在跳躍
jumping = False
# 重力加速度(讓恐龍跳起後會往下掉)
gravity = 1
# 跳躍初速度(負值代表往上跳)
jump_power = -9
# 地面Y座標
ground_level = 60

# 障礙物寬度、高度及初始X座標(從右邊開始)
obstacle_width = 10
obstacle_height = 10
obstacle_x = 128
# 障礙物移動速度
obstacle_speed = 2

# 遊戲分數初始為0
score = 0

# 畫恐龍函式，根據x,y座標畫出身體、腿、尾巴和頭
def draw_dino(x, y):
    # 畫身體(12x6像素)
    for i in range(dino_width):
        for j in range(dino_height):
            display.pixel(x + i, y + j, 1)
    # 畫左腿(3x3像素)
    for i in range(3):
        for j in range(3):
            display.pixel(x + i, y + dino_height + j, 1)
    # 畫右腿(3x3像素)
    for i in range(3):
        for j in range(3):
            display.pixel(x + dino_width - 3 + i, y + dino_height + j, 1)
    # 畫尾巴(4x4像素)
    for i in range(4):
        for j in range(4):
            display.pixel(x - 4 + i, y + 2 + j, 1)
    # 畫頭(6x6像素)
    for i in range(6):
        for j in range(6):
            display.pixel(x + dino_width - 6 + i, y - 6 + j, 1)
    # 畫眼睛(用黑色擦掉部分像素形成眼睛)
    for i in range(2):
        for j in range(2):
            display.pixel(x + dino_width - 4 + i, y - 4 + j, 0)

# 畫障礙物函式(小樹)
def draw_obstacle(x, y):
    # 畫樹幹(4x6像素)
    for i in range(4):
        for j in range(6):
            display.pixel(x + 2 + i, y + 4 + j, 1)
    # 畫樹葉(12x6像素)
    for i in range(12):
        for j in range(6):
            display.pixel(x - 4 + i, y + j, 1)

# 重設遊戲狀態，恐龍回地面，障礙物回右邊，分數歸零
def reset_game():
    global dino_y, dino_velocity, jumping, obstacle_x, score, obstacle_speed
    dino_y = ground_level - dino_height
    dino_velocity = 0
    jumping = False
    obstacle_x = 128
    score = 0
    obstacle_speed = 2

# 顯示遊戲結束畫面
def display_game_over():
    display.fill(0)  # 清螢幕
    display.text("Game Over!", 30, 30)
    display.text("Score: {}".format(score), 30, 40)
    display.show()

# 遊戲主迴圈
def game_loop():
    global dino_y, dino_velocity, jumping, obstacle_x, score, obstacle_speed

    while True:
        display.fill(0)  # 每回合清空螢幕

        # 按鍵持續按住時，持續給跳躍初速度，恐龍往上推，停空更久
        if jumping:
            if jump_button.value() == 0:
                # 按鍵按著，保持當前速度與高度，恐龍停空不動
                pass
            else:
                # 放開按鍵，開始受重力影響往下掉
                dino_velocity += gravity
                dino_y += dino_velocity

            # 落回地面判斷
            if dino_y >= ground_level - dino_height:
                dino_y = ground_level - dino_height
                jumping = False
                dino_velocity = 0
        else:
            # 如果沒跳且按鍵按下，開始跳躍
            if jump_button.value() == 0:
                dino_velocity = jump_power
                jumping = True
                dino_y += dino_velocity


        # 障礙物往左移動
        obstacle_x -= obstacle_speed
        # 障礙物跑出螢幕左側，重置並加分
        if obstacle_x < 0:
            obstacle_x = 128
            score += 1
            # 每5分速度提速
            if score % 2 == 0:
                obstacle_speed += 2

        # 碰撞判斷(矩形碰撞)
        if (obstacle_x < dino_x + dino_width and
            obstacle_x + obstacle_width > dino_x and
            dino_y < ground_level and
            dino_y + dino_height > ground_level - obstacle_height):
            display_game_over()
            while True:
                time.sleep(1)  # 遊戲停止

        # 畫恐龍和障礙物
        draw_dino(dino_x, dino_y)
        draw_obstacle(obstacle_x, ground_level - obstacle_height)

        # 顯示分數
        display.text("Score: {}".format(score), 0, 0)

        # 更新畫面
        display.show()

        # 控制遊戲速度
        time.sleep(0.05)

# 遊戲開始前重設狀態
reset_game()
# 執行遊戲主迴圈
game_loop()