| 1 | 1 | class BowlingGame: |
| 2 | 2 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 3 | """ |
| 4 | Initialize a new bowling game. |
| 5 | """ |
| 6 | self.rolls = [] |
| 7 | self.current_roll = 0 |
| 8 | |
| 5 | 9 | def roll(self, pins): |
| 6 | | pass |
| 7 | | |
| 10 | """ |
| 11 | Record a roll in the game. |
| 12 | |
| 13 | Args: |
| 14 | pins (int): Number of pins knocked down in this roll. |
| 15 | |
| 16 | Raises: |
| 17 | ValueError: If the number of pins is invalid. |
| 18 | """ |
| 19 | # Edge Case: Invalid pin count (negative or more than 10) |
| 20 | if pins < 0 or pins > 10: |
| 21 | raise ValueError("Pins must be between 0 and 10") |
| 22 | |
| 23 | # Edge Case: Game already completed (10 frames finished) |
| 24 | if self.is_game_complete(): |
| 25 | raise IndexError("Game has already ended") |
| 26 | |
| 27 | # Edge Case: Check if this roll would exceed 10 pins in a frame (non-strike) |
| 28 | if len(self.rolls) > 0 and pins > 0: |
| 29 | roll_index = len(self.rolls) |
| 30 | # Check if we're in the middle of a frame (not first roll of a frame) |
| 31 | if not self._is_first_roll_of_frame(roll_index): |
| 32 | # Get the first roll of this frame |
| 33 | first_roll_index = self._get_first_roll_of_frame(roll_index) |
| 34 | if first_roll_index is not None and first_roll_index < len(self.rolls): |
| 35 | first_roll = self.rolls[first_roll_index] |
| 36 | # Only validate non-strike frames (first roll wasn't a strike) |
| 37 | if first_roll < 10 and first_roll + pins > 10: |
| 38 | raise ValueError("Cannot knock down more than 10 pins in a frame") |
| 39 | |
| 40 | self.rolls.append(pins) |
| 41 | self.current_roll += 1 |
| 42 | |
| 8 | 43 | def score(self): |
| 9 | | pass |
| 44 | """ |
| 45 | Calculate the total score for the game. |
| 46 | |
| 47 | Returns: |
| 48 | int: The total score of the game. |
| 49 | |
| 50 | Raises: |
| 51 | IndexError: If the game is not yet complete. |
| 52 | """ |
| 53 | # Edge Case: Game not yet complete |
| 54 | if not self.is_game_complete(): |
| 55 | raise IndexError("Game is not yet complete") |
| 56 | |
| 57 | score = 0 |
| 58 | roll_index = 0 |
| 59 | |
| 60 | for frame in range(10): |
| 61 | # Edge Case: Strike in frames 1-9 |
| 62 | if self.is_strike(roll_index) and frame < 9: |
| 63 | score += 10 + self.strike_bonus(roll_index) |
| 64 | roll_index += 1 |
| 65 | # Edge Case: Spare in frames 1-9 |
| 66 | elif self.is_spare(roll_index) and frame < 9: |
| 67 | score += 10 + self.spare_bonus(roll_index) |
| 68 | roll_index += 2 |
| 69 | # Edge Case: Open frame in frames 1-9 |
| 70 | elif frame < 9: |
| 71 | score += self.sum_of_balls_in_frame(roll_index) |
| 72 | roll_index += 2 |
| 73 | # Edge Case: Tenth frame handling |
| 74 | else: # frame == 9 |
| 75 | # Edge Case: Strike in tenth frame |
| 76 | if self.is_strike(roll_index): |
| 77 | # Edge Case: Invalid fill balls for strike in tenth frame |
| 78 | if len(self.rolls) < roll_index + 3: |
| 79 | raise ValueError("Invalid fill balls") |
| 80 | score += 10 + self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 81 | # Edge Case: Spare in tenth frame |
| 82 | elif self.is_spare(roll_index): |
| 83 | # Edge Case: Invalid fill balls for spare in tenth frame |
| 84 | if len(self.rolls) < roll_index + 3: |
| 85 | raise ValueError("Invalid fill balls") |
| 86 | score += 10 + self.rolls[roll_index + 2] |
| 87 | # Edge Case: Open tenth frame |
| 88 | else: |
| 89 | # Edge Case: Too many rolls in open tenth frame |
| 90 | if roll_index + 2 > len(self.rolls): |
| 91 | raise ValueError("Invalid fill balls") |
| 92 | score += self.sum_of_balls_in_frame(roll_index) |
| 93 | |
| 94 | return score |
| 95 | |
| 96 | def is_game_complete(self): |
| 97 | """ |
| 98 | Check if the game is complete (10 frames have been played). |
| 99 | |
| 100 | Returns: |
| 101 | bool: True if the game is complete, False otherwise. |
| 102 | """ |
| 103 | if len(self.rolls) == 0: |
| 104 | return False |
| 105 | |
| 106 | roll_index = 0 |
| 107 | frames_completed = 0 |
| 108 | |
| 109 | # Count frames 1-9 |
| 110 | while frames_completed < 9 and roll_index < len(self.rolls): |
| 111 | if roll_index < len(self.rolls) and self.rolls[roll_index] == 10: # Strike |
| 112 | roll_index += 1 |
| 113 | elif roll_index + 1 < len(self.rolls): # Regular frame (spare or open) |
| 114 | roll_index += 2 |
| 115 | else: # Not enough rolls to complete current frame |
| 116 | break |
| 117 | frames_completed += 1 |
| 118 | |
| 119 | # If we haven't completed 9 frames, game is not complete |
| 120 | if frames_completed < 9: |
| 121 | return False |
| 122 | |
| 123 | # Handle tenth frame |
| 124 | if roll_index >= len(self.rolls): |
| 125 | return False |
| 126 | |
| 127 | # First roll of tenth frame |
| 128 | if roll_index < len(self.rolls): |
| 129 | first_roll = self.rolls[roll_index] |
| 130 | |
| 131 | # Strike in tenth frame |
| 132 | if first_roll == 10: |
| 133 | # Need two more rolls |
| 134 | return roll_index + 3 <= len(self.rolls) |
| 135 | |
| 136 | # Need second roll |
| 137 | if roll_index + 1 >= len(self.rolls): |
| 138 | return False |
| 139 | |
| 140 | second_roll = self.rolls[roll_index + 1] |
| 141 | |
| 142 | # Spare in tenth frame |
| 143 | if first_roll + second_roll == 10: |
| 144 | # Need one more roll |
| 145 | return roll_index + 3 <= len(self.rolls) |
| 146 | |
| 147 | # Open frame in tenth frame |
| 148 | return roll_index + 2 <= len(self.rolls) |
| 149 | |
| 150 | return False |
| 151 | |
| 152 | def is_strike(self, roll_index): |
| 153 | """ |
| 154 | Check if a roll is a strike. |
| 155 | |
| 156 | Args: |
| 157 | roll_index (int): Index of the roll to check. |
| 158 | |
| 159 | Returns: |
| 160 | bool: True if the roll is a strike, False otherwise. |
| 161 | """ |
| 162 | return roll_index < len(self.rolls) and self.rolls[roll_index] == 10 |
| 163 | |
| 164 | def is_spare(self, roll_index): |
| 165 | """ |
| 166 | Check if a frame is a spare. |
| 167 | |
| 168 | Args: |
| 169 | roll_index (int): Index of the first roll in the frame. |
| 170 | |
| 171 | Returns: |
| 172 | bool: True if the frame is a spare, False otherwise. |
| 173 | """ |
| 174 | return (roll_index + 1 < len(self.rolls) and |
| 175 | self.rolls[roll_index] + self.rolls[roll_index + 1] == 10) |
| 176 | |
| 177 | def strike_bonus(self, roll_index): |
| 178 | """ |
| 179 | Calculate the bonus for a strike. |
| 180 | |
| 181 | Args: |
| 182 | roll_index (int): Index of the strike roll. |
| 183 | |
| 184 | Returns: |
| 185 | int: The bonus points for the strike. |
| 186 | """ |
| 187 | # Edge Case: Not enough rolls for strike bonus calculation |
| 188 | if roll_index + 2 >= len(self.rolls): |
| 189 | raise ValueError("Not enough rolls to calculate strike bonus") |
| 190 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 191 | |
| 192 | def spare_bonus(self, roll_index): |
| 193 | """ |
| 194 | Calculate the bonus for a spare. |
| 195 | |
| 196 | Args: |
| 197 | roll_index (int): Index of the first roll in the spare frame. |
| 198 | |
| 199 | Returns: |
| 200 | int: The bonus points for the spare. |
| 201 | """ |
| 202 | # Edge Case: Not enough rolls for spare bonus calculation |
| 203 | if roll_index + 2 >= len(self.rolls): |
| 204 | raise ValueError("Not enough rolls to calculate spare bonus") |
| 205 | return self.rolls[roll_index + 2] |
| 206 | |
| 207 | def sum_of_balls_in_frame(self, roll_index): |
| 208 | """ |
| 209 | Calculate the sum of pins knocked down in a frame. |
| 210 | |
| 211 | Args: |
| 212 | roll_index (int): Index of the first roll in the frame. |
| 213 | |
| 214 | Returns: |
| 215 | int: The sum of pins knocked down in the frame. |
| 216 | """ |
| 217 | # Edge Case: Not enough rolls to calculate frame sum |
| 218 | if roll_index + 1 >= len(self.rolls): |
| 219 | raise ValueError("Not enough rolls to calculate frame sum") |
| 220 | # Edge Case: Invalid frame (more than 10 pins) |
| 221 | if self.rolls[roll_index] + self.rolls[roll_index + 1] > 10: |
| 222 | raise ValueError("Invalid frame - more than 10 pins") |
| 223 | return self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 224 | |
| 225 | def _is_first_roll_of_frame(self, roll_index): |
| 226 | """ |
| 227 | Check if the given roll index is the first roll of a frame. |
| 228 | |
| 229 | Args: |
| 230 | roll_index (int): Index of the roll to check. |
| 231 | |
| 232 | Returns: |
| 233 | bool: True if this is the first roll of a frame, False otherwise. |
| 234 | """ |
| 235 | if roll_index == 0: |
| 236 | return True |
| 237 | |
| 238 | # Count frames up to this roll |
| 239 | current_frame = 0 |
| 240 | index = 0 |
| 241 | |
| 242 | while index < roll_index and current_frame < 10: |
| 243 | if index < len(self.rolls) and self.rolls[index] == 10: # Strike |
| 244 | index += 1 |
| 245 | else: |
| 246 | index += 2 |
| 247 | current_frame += 1 |
| 248 | |
| 249 | return index == roll_index |
| 250 | |
| 251 | def _get_first_roll_of_frame(self, roll_index): |
| 252 | """ |
| 253 | Get the index of the first roll of the frame that contains the given roll index. |
| 254 | |
| 255 | Args: |
| 256 | roll_index (int): Index of the roll in the frame. |
| 257 | |
| 258 | Returns: |
| 259 | int or None: Index of the first roll of the frame, or None if not found. |
| 260 | """ |
| 261 | if roll_index == 0: |
| 262 | return 0 |
| 263 | |
| 264 | # Find which frame this roll belongs to |
| 265 | current_frame = 0 |
| 266 | index = 0 |
| 267 | |
| 268 | while index < roll_index and current_frame < 10: |
| 269 | if index < len(self.rolls) and self.rolls[index] == 10: # Strike |
| 270 | if index + 1 > roll_index: |
| 271 | return index |
| 272 | index += 1 |
| 273 | else: |
| 274 | if index + 2 > roll_index: |
| 275 | return index |
| 276 | index += 2 |
| 277 | current_frame += 1 |
| 278 | |
| 279 | return index if index <= roll_index else None |
| 280 | |
| 281 | # Handled Edge Cases: Invalid pin count, game already completed, game not yet complete, |
| 282 | # strike in frames 1-9, spare in frames 1-9, open frame in frames 1-9, |
| 283 | # strike in tenth frame, invalid fill balls for strike in tenth frame, |
| 284 | # spare in tenth frame, invalid fill balls for spare in tenth frame, |
| 285 | # open tenth frame, too many rolls in open tenth frame, |
| 286 | # not enough rolls for strike bonus calculation, |
| 287 | # not enough rolls for spare bonus calculation, |
| 288 | # not enough rolls to calculate frame sum, |
| 289 | # invalid frame (more than 10 pins) |