| 1 | 1 | class BowlingGame: |
| 2 | 2 | def __init__(self): |
| 3 | | pass |
| 3 | """ |
| 4 | Initialize a new bowling game. |
| 5 | """ |
| 6 | self.rolls = [] |
| 4 | 7 | |
| 5 | 8 | def roll(self, pins): |
| 6 | | pass |
| 9 | """ |
| 10 | Record a roll in the game. |
| 11 | |
| 12 | Args: |
| 13 | pins (int): Number of pins knocked down in this roll. |
| 14 | |
| 15 | Raises: |
| 16 | ValueError: If the number of pins is invalid. |
| 17 | """ |
| 18 | # Edge Case: Invalid number of pins (negative or more than 10) |
| 19 | if pins < 0: |
| 20 | raise ValueError("Pins must be between 0 and 10") |
| 21 | if pins > 10: |
| 22 | raise ValueError("Pins must be between 0 and 10") |
| 23 | |
| 24 | # Edge Case: Game is already over (10 frames completed) |
| 25 | if self._is_game_over(): |
| 26 | raise IndexError("Game is already complete") |
| 27 | |
| 28 | self.rolls.append(pins) |
| 29 | |
| 30 | # Edge Case: Too many pins in a frame (except in the 10th frame) |
| 31 | if not self._is_tenth_frame() and len(self.rolls) >= 2 and len(self.rolls) % 2 == 0: |
| 32 | if self.rolls[-2] + self.rolls[-1] > 10 and self.rolls[-2] != 10: |
| 33 | raise ValueError("Cannot knock down more than 10 pins in a frame") |
| 34 | |
| 35 | # Edge Case: Invalid fill balls in 10th frame |
| 36 | if self._is_tenth_frame(): |
| 37 | self._validate_tenth_frame_fill_balls() |
| 7 | 38 | |
| 8 | 39 | def score(self): |
| 9 | | pass |
| 40 | """ |
| 41 | Calculate the total score for the game. |
| 42 | |
| 43 | Returns: |
| 44 | int: The total score of the game. |
| 45 | |
| 46 | Raises: |
| 47 | ValueError: If the game is not yet complete. |
| 48 | """ |
| 49 | # Edge Case: Game is not complete |
| 50 | if not self._is_game_over(): |
| 51 | raise IndexError("Game is not yet complete") |
| 52 | |
| 53 | score = 0 |
| 54 | roll_index = 0 |
| 55 | |
| 56 | for frame in range(10): |
| 57 | # Edge Case: Strike in regular frames (1-9) |
| 58 | if self._is_strike(roll_index) and frame < 9: |
| 59 | score += 10 + self._strike_bonus(roll_index) |
| 60 | roll_index += 1 |
| 61 | # Edge Case: Spare in regular frames (1-9) |
| 62 | elif self._is_spare(roll_index) and frame < 9: |
| 63 | score += 10 + self._spare_bonus(roll_index) |
| 64 | roll_index += 2 |
| 65 | # Edge Case: Open frame in regular frames (1-9) |
| 66 | elif frame < 9: |
| 67 | score += self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 68 | roll_index += 2 |
| 69 | # Edge Case: Tenth frame handling |
| 70 | else: # 10th frame |
| 71 | if self._is_strike(roll_index): |
| 72 | # Edge Case: Tenth frame is a strike |
| 73 | score += self._tenth_frame_score(roll_index, 3) |
| 74 | elif self._is_spare(roll_index): |
| 75 | # Edge Case: Tenth frame is a spare |
| 76 | score += self._tenth_frame_score(roll_index, 3) |
| 77 | else: |
| 78 | # Edge Case: Tenth frame is open |
| 79 | score += self._tenth_frame_score(roll_index, 2) |
| 80 | |
| 81 | return score |
| 82 | |
| 83 | def _is_strike(self, roll_index): |
| 84 | """ |
| 85 | Check if a roll is a strike. |
| 86 | |
| 87 | Args: |
| 88 | roll_index (int): Index of the roll to check. |
| 89 | |
| 90 | Returns: |
| 91 | bool: True if the roll is a strike, False otherwise. |
| 92 | """ |
| 93 | if roll_index >= len(self.rolls): |
| 94 | return False |
| 95 | return self.rolls[roll_index] == 10 |
| 96 | |
| 97 | def _is_spare(self, roll_index): |
| 98 | """ |
| 99 | Check if two rolls form a spare. |
| 100 | |
| 101 | Args: |
| 102 | roll_index (int): Index of the first roll in the frame. |
| 103 | |
| 104 | Returns: |
| 105 | bool: True if the frame is a spare, False otherwise. |
| 106 | """ |
| 107 | if roll_index + 1 >= len(self.rolls): |
| 108 | return False |
| 109 | return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10 |
| 110 | |
| 111 | def _strike_bonus(self, roll_index): |
| 112 | """ |
| 113 | Calculate the bonus for a strike. |
| 114 | |
| 115 | Args: |
| 116 | roll_index (int): Index of the strike roll. |
| 117 | |
| 118 | Returns: |
| 119 | int: The bonus points for the strike. |
| 120 | """ |
| 121 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 122 | |
| 123 | def _spare_bonus(self, roll_index): |
| 124 | """ |
| 125 | Calculate the bonus for a spare. |
| 126 | |
| 127 | Args: |
| 128 | roll_index (int): Index of the first roll in the spare frame. |
| 129 | |
| 130 | Returns: |
| 131 | int: The bonus points for the spare. |
| 132 | """ |
| 133 | return self.rolls[roll_index + 2] |
| 134 | |
| 135 | def _is_game_over(self): |
| 136 | """ |
| 137 | Check if the game is over (10 frames completed). |
| 138 | |
| 139 | Returns: |
| 140 | bool: True if the game is over, False otherwise. |
| 141 | """ |
| 142 | # Count frames |
| 143 | roll_index = 0 |
| 144 | frame_count = 0 |
| 145 | |
| 146 | for frame in range(10): |
| 147 | if frame < 9: # Frames 1-9 |
| 148 | # Check bounds before accessing rolls |
| 149 | if roll_index >= len(self.rolls): |
| 150 | return False |
| 151 | if self._is_strike(roll_index): |
| 152 | roll_index += 1 |
| 153 | else: |
| 154 | # Check bounds for second roll |
| 155 | if roll_index + 1 >= len(self.rolls): |
| 156 | return False |
| 157 | roll_index += 2 |
| 158 | frame_count += 1 |
| 159 | else: # 10th frame |
| 160 | # Check bounds for first roll of 10th frame |
| 161 | if roll_index >= len(self.rolls): |
| 162 | return False |
| 163 | # Edge Case: 10th frame is a strike |
| 164 | if self._is_strike(roll_index): |
| 165 | # Needs two more rolls |
| 166 | if roll_index + 2 >= len(self.rolls): |
| 167 | return False |
| 168 | # Edge Case: 10th frame is a spare |
| 169 | elif (roll_index + 1 < len(self.rolls) and |
| 170 | self.rolls[roll_index] + self.rolls[roll_index + 1] == 10): |
| 171 | # Needs one more roll |
| 172 | if roll_index + 2 >= len(self.rolls): |
| 173 | return False |
| 174 | # Edge Case: 10th frame is open |
| 175 | elif roll_index + 1 >= len(self.rolls): |
| 176 | return False |
| 177 | frame_count += 1 |
| 178 | |
| 179 | return frame_count == 10 |
| 180 | |
| 181 | def _is_tenth_frame(self): |
| 182 | """ |
| 183 | Check if we're currently in the tenth frame. |
| 184 | |
| 185 | Returns: |
| 186 | bool: True if we're in the tenth frame, False otherwise. |
| 187 | """ |
| 188 | # Count completed frames |
| 189 | roll_index = 0 |
| 190 | frame_count = 0 |
| 191 | |
| 192 | while roll_index < len(self.rolls) and frame_count < 10: |
| 193 | if frame_count < 9: # Frames 1-9 |
| 194 | if self._is_strike(roll_index): |
| 195 | roll_index += 1 |
| 196 | else: |
| 197 | roll_index += 2 |
| 198 | else: # 10th frame |
| 199 | # We're in the process of completing the 10th frame |
| 200 | return True |
| 201 | frame_count += 1 |
| 202 | |
| 203 | return False |
| 204 | |
| 205 | def _tenth_frame_score(self, roll_index, num_rolls): |
| 206 | """ |
| 207 | Calculate the score for the tenth frame. |
| 208 | |
| 209 | Args: |
| 210 | roll_index (int): Index of the first roll in the tenth frame. |
| 211 | num_rolls (int): Number of rolls in the tenth frame. |
| 212 | |
| 213 | Returns: |
| 214 | int: The score of the tenth frame. |
| 215 | """ |
| 216 | frame_score = 0 |
| 217 | for i in range(num_rolls): |
| 218 | if roll_index + i < len(self.rolls): |
| 219 | frame_score += self.rolls[roll_index + i] |
| 220 | return frame_score |
| 221 | |
| 222 | def _validate_tenth_frame_fill_balls(self): |
| 223 | """ |
| 224 | Validate that fill balls in the tenth frame are valid. |
| 225 | |
| 226 | Raises: |
| 227 | ValueError: If fill balls are invalid. |
| 228 | """ |
| 229 | # Count completed frames to determine if we're in fill balls |
| 230 | roll_index = 0 |
| 231 | frame_count = 0 |
| 232 | |
| 233 | # Count frames 1-9 |
| 234 | while frame_count < 9 and roll_index < len(self.rolls): |
| 235 | if self._is_strike(roll_index): |
| 236 | roll_index += 1 |
| 237 | else: |
| 238 | roll_index += 2 |
| 239 | frame_count += 1 |
| 240 | |
| 241 | # Now we're at the 10th frame |
| 242 | if frame_count == 9 and roll_index < len(self.rolls): |
| 243 | # Check if 10th frame is a strike |
| 244 | if self._is_strike(roll_index): |
| 245 | # First fill ball |
| 246 | if roll_index + 1 < len(self.rolls): |
| 247 | first_fill = self.rolls[roll_index + 1] |
| 248 | if first_fill < 0 or first_fill > 10: |
| 249 | raise ValueError("Pins must be between 0 and 10") |
| 250 | |
| 251 | # Second fill ball - check if it exists and validate sum with first fill |
| 252 | if roll_index + 2 < len(self.rolls): |
| 253 | second_fill = self.rolls[roll_index + 2] |
| 254 | if second_fill < 0 or second_fill > 10: |
| 255 | raise ValueError("Pins must be between 0 and 10") |
| 256 | # If first fill ball is not a strike, the sum can't exceed 10 |
| 257 | if first_fill != 10 and first_fill + second_fill > 10: |
| 258 | raise ValueError("invalid fill balls") |
| 259 | |
| 260 | # Check if 10th frame is a spare (first two rolls sum to 10 but first isn't 10) |
| 261 | elif (roll_index + 1 < len(self.rolls) and |
| 262 | self.rolls[roll_index] + self.rolls[roll_index + 1] == 10): |
| 263 | # One fill ball |
| 264 | if roll_index + 2 < len(self.rolls): |
| 265 | fill_ball = self.rolls[roll_index + 2] |
| 266 | if fill_ball < 0 or fill_ball > 10: |
| 267 | raise ValueError("Pins must be between 0 and 10") |
| 268 | |
| 269 | # Handled Edge Cases: Invalid pin count, game already complete, too many pins in a frame, |
| 270 | # game not complete, strike in regular frames, spare in regular frames, |
| 271 | # open frame in regular frames, tenth frame is a strike, tenth frame is a spare, |
| 272 | # tenth frame is open |