| 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("invalid pin count") |
| 22 | |
| 23 | # Edge Case: Too many pins in a frame (except 10th frame special cases) |
| 24 | if len(self.rolls) > 0 and not self.is_game_complete(): |
| 25 | # Check if this is the second roll of a frame (not 10th frame) |
| 26 | roll_index = 0 |
| 27 | frame_count = 0 |
| 28 | |
| 29 | # Find which frame we are currently in |
| 30 | while roll_index < len(self.rolls) and frame_count < 10: |
| 31 | if frame_count == 9: # 10th frame - special rules apply |
| 32 | break |
| 33 | elif self.is_strike(roll_index): |
| 34 | roll_index += 1 |
| 35 | frame_count += 1 |
| 36 | elif roll_index + 1 < len(self.rolls): |
| 37 | roll_index += 2 |
| 38 | frame_count += 1 |
| 39 | else: |
| 40 | # We are in the middle of a frame (second roll not yet taken) |
| 41 | if frame_count < 9 and self.rolls[roll_index] + pins > 10: |
| 42 | raise ValueError("invalid pin count") |
| 43 | break |
| 44 | |
| 45 | # Edge Case: Game already completed |
| 46 | if self.is_game_complete(): |
| 47 | raise IndexError("cannot throw bonus with an open tenth frame") |
| 48 | |
| 49 | self.rolls.append(pins) |
| 50 | self.current_roll += 1 |
| 51 | |
| 8 | 52 | def score(self): |
| 9 | | pass |
| 53 | """ |
| 54 | Calculate the total score for the game. |
| 55 | |
| 56 | Returns: |
| 57 | int: The total score of the game. |
| 58 | |
| 59 | Raises: |
| 60 | ValueError: If the game is not yet complete. |
| 61 | """ |
| 62 | # Edge Case: Game not complete |
| 63 | if not self.is_game_complete(): |
| 64 | raise IndexError("game is not yet complete") |
| 65 | |
| 66 | score = 0 |
| 67 | roll_index = 0 |
| 68 | |
| 69 | for frame in range(10): |
| 70 | # Edge Case: Strike in regular frames (1-9) |
| 71 | if self.is_strike(roll_index) and frame < 9: |
| 72 | score += 10 + self.strike_bonus(roll_index) |
| 73 | roll_index += 1 |
| 74 | # Edge Case: Spare in regular frames (1-9) |
| 75 | elif self.is_spare(roll_index) and frame < 9: |
| 76 | score += 10 + self.spare_bonus(roll_index) |
| 77 | roll_index += 2 |
| 78 | # Edge Case: Open frame in regular frames (1-9) |
| 79 | elif frame < 9: |
| 80 | score += self.sum_of_balls_in_frame(roll_index) |
| 81 | roll_index += 2 |
| 82 | # Edge Case: Tenth frame handling |
| 83 | else: # 10th frame |
| 84 | score += self.sum_of_balls_in_frame(roll_index) |
| 85 | roll_index += 2 |
| 86 | |
| 87 | # Edge Case: Strike in tenth frame |
| 88 | if self.is_strike(roll_index - 2): |
| 89 | # Add bonus rolls for strike in 10th frame |
| 90 | if roll_index < len(self.rolls): |
| 91 | score += self.rolls[roll_index] |
| 92 | roll_index += 1 |
| 93 | if roll_index < len(self.rolls): |
| 94 | score += self.rolls[roll_index] |
| 95 | # Edge Case: Spare in tenth frame |
| 96 | elif self.is_spare(roll_index - 2): |
| 97 | # Add bonus roll for spare in 10th frame |
| 98 | if roll_index < len(self.rolls): |
| 99 | score += self.rolls[roll_index] |
| 100 | |
| 101 | return score |
| 102 | |
| 103 | def is_game_complete(self): |
| 104 | """ |
| 105 | Check if the game is complete (10 frames played). |
| 106 | |
| 107 | Returns: |
| 108 | bool: True if the game is complete, False otherwise. |
| 109 | """ |
| 110 | # Count the number of completed frames |
| 111 | roll_index = 0 |
| 112 | frames_completed = 0 |
| 113 | |
| 114 | # Process frames 1-9 |
| 115 | while frames_completed < 9 and roll_index < len(self.rolls): |
| 116 | if self.is_strike(roll_index): |
| 117 | roll_index += 1 |
| 118 | elif roll_index + 1 < len(self.rolls): |
| 119 | roll_index += 2 |
| 120 | else: |
| 121 | # Incomplete frame |
| 122 | return False |
| 123 | frames_completed += 1 |
| 124 | |
| 125 | # Process 10th frame |
| 126 | if frames_completed == 9 and roll_index < len(self.rolls): |
| 127 | # 10th frame is special - can have 2 or 3 rolls |
| 128 | if self.is_strike(roll_index): |
| 129 | # Strike in 10th frame - need 2 more rolls |
| 130 | if roll_index + 2 < len(self.rolls): |
| 131 | roll_index += 3 |
| 132 | frames_completed += 1 |
| 133 | else: |
| 134 | # Not enough rolls for complete 10th frame |
| 135 | return False |
| 136 | elif roll_index + 1 < len(self.rolls) and self.is_spare(roll_index): |
| 137 | # Spare in 10th frame - need 1 more roll |
| 138 | if roll_index + 2 < len(self.rolls): |
| 139 | roll_index += 3 |
| 140 | frames_completed += 1 |
| 141 | else: |
| 142 | # Not enough rolls for complete 10th frame |
| 143 | return False |
| 144 | elif roll_index + 1 < len(self.rolls): |
| 145 | # Open frame in 10th frame - 2 rolls |
| 146 | roll_index += 2 |
| 147 | frames_completed += 1 |
| 148 | else: |
| 149 | # Not enough rolls for complete 10th frame |
| 150 | return False |
| 151 | |
| 152 | # Game is complete if we've completed 10 frames |
| 153 | return frames_completed == 10 |
| 154 | |
| 155 | def is_strike(self, roll_index): |
| 156 | """ |
| 157 | Check if a roll is a strike. |
| 158 | |
| 159 | Args: |
| 160 | roll_index (int): Index of the roll to check. |
| 161 | |
| 162 | Returns: |
| 163 | bool: True if the roll is a strike, False otherwise. |
| 164 | """ |
| 165 | # Edge Case: Index out of bounds |
| 166 | if roll_index >= len(self.rolls): |
| 167 | return False |
| 168 | return self.rolls[roll_index] == 10 |
| 169 | |
| 170 | def is_spare(self, roll_index): |
| 171 | """ |
| 172 | Check if two rolls form a spare. |
| 173 | |
| 174 | Args: |
| 175 | roll_index (int): Index of the first roll to check. |
| 176 | |
| 177 | Returns: |
| 178 | bool: True if the two rolls form a spare, False otherwise. |
| 179 | """ |
| 180 | # Edge Case: Index out of bounds |
| 181 | if roll_index + 1 >= len(self.rolls): |
| 182 | return False |
| 183 | return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10 |
| 184 | |
| 185 | def strike_bonus(self, roll_index): |
| 186 | """ |
| 187 | Calculate the bonus for a strike. |
| 188 | |
| 189 | Args: |
| 190 | roll_index (int): Index of the strike roll. |
| 191 | |
| 192 | Returns: |
| 193 | int: The bonus points for the strike. |
| 194 | """ |
| 195 | # Edge Case: Not enough rolls for bonus calculation |
| 196 | if roll_index + 2 >= len(self.rolls): |
| 197 | return 0 |
| 198 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 199 | |
| 200 | def spare_bonus(self, roll_index): |
| 201 | """ |
| 202 | Calculate the bonus for a spare. |
| 203 | |
| 204 | Args: |
| 205 | roll_index (int): Index of the first roll in the spare frame. |
| 206 | |
| 207 | Returns: |
| 208 | int: The bonus points for the spare. |
| 209 | """ |
| 210 | # Edge Case: Not enough rolls for bonus calculation |
| 211 | if roll_index + 2 >= len(self.rolls): |
| 212 | return 0 |
| 213 | return self.rolls[roll_index + 2] |
| 214 | |
| 215 | def get_current_frame(self): |
| 216 | """ |
| 217 | Get the current frame number (0-indexed). |
| 218 | |
| 219 | Returns: |
| 220 | int: Current frame number (0-9). |
| 221 | """ |
| 222 | roll_index = 0 |
| 223 | frame_count = 0 |
| 224 | |
| 225 | while roll_index < len(self.rolls) and frame_count < 10: |
| 226 | if frame_count == 9: # 10th frame |
| 227 | return 9 |
| 228 | elif self.is_strike(roll_index): |
| 229 | roll_index += 1 |
| 230 | frame_count += 1 |
| 231 | elif roll_index + 1 < len(self.rolls): |
| 232 | roll_index += 2 |
| 233 | frame_count += 1 |
| 234 | else: |
| 235 | break |
| 236 | |
| 237 | return frame_count |
| 238 | |
| 239 | def sum_of_balls_in_frame(self, roll_index): |
| 240 | """ |
| 241 | Calculate the sum of pins knocked down in a frame. |
| 242 | |
| 243 | Args: |
| 244 | roll_index (int): Index of the first roll in the frame. |
| 245 | |
| 246 | Returns: |
| 247 | int: The sum of pins knocked down in the frame. |
| 248 | """ |
| 249 | # Edge Case: Not enough rolls in frame |
| 250 | if roll_index >= len(self.rolls): |
| 251 | return 0 |
| 252 | if roll_index + 1 >= len(self.rolls): |
| 253 | return self.rolls[roll_index] |
| 254 | return self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 255 | |
| 256 | # Handled Edge Cases: Invalid pin count, game already completed, game not complete, |
| 257 | # strike in regular frames, spare in regular frames, open frame in regular frames, |
| 258 | # tenth frame handling, strike in tenth frame, spare in tenth frame, open frame in tenth frame, |
| 259 | # index out of bounds, not enough rolls for bonus calculation, not enough rolls in frame |