# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.

# Universal Loops Test Suite
# Tests universal quantification - succeed if ALL elements satisfy the condition
# Corresponds to Rego's "every x in collection; condition" patterns

cases:
  - note: universal_basic_every
    description: Basic universal quantification - every element satisfies condition
    example_rego: |
      # Check if every element in array is greater than 0
      every x in [1, 2, 3] {
        x > 0  # true (all elements > 0)
      }
    literals:
      - 1
      - 2
      - 3
      - 0  # comparison value
    instruction_params:
      loop_params:
        - mode: "Every"
          collection: 0
          key_reg: 4
          value_reg: 5
          result_reg: 6
          body_start: 8
          loop_end: 12
    instructions:
      - "ArrayNew { dest: 0 }"              # Create input array [1, 2, 3] in register 0
      - "Load { dest: 1, literal_idx: 0 }"  # Load 1 into register 1
      - "ArrayPush { arr: 0, value: 1 }"    # Push 1 to array
      - "Load { dest: 2, literal_idx: 1 }"  # Load 2 into register 2
      - "ArrayPush { arr: 0, value: 2 }"    # Push 2 to array
      - "Load { dest: 3, literal_idx: 2 }"  # Load 3 into register 3
      - "ArrayPush { arr: 0, value: 3 }"    # Push 3 to array
      - "LoopStart { params_index: 0 }"     # Start universal loop using parameter table index 0
      - "Load { dest: 7, literal_idx: 3 }"  # Load comparison value 0 into register 7
      - "Gt { dest: 8, left: 5, right: 7 }" # Check if current value > 0
      - "AssertCondition { condition: 8 }"  # Assert the condition result for universal logic
      - "LoopNext { body_start: 8, loop_end: 12 }"  # Continue to next iteration or exit early if condition fails
      - "Return { value: 6 }"               # Return result (true if all elements satisfied condition)
    want_result: true

  - note: universal_one_fails
    description: Universal quantification where one element fails condition
    example_rego: |
      # Check if every element in array is greater than 1  
      every x in [1, 2, 3] {
        x > 1  # false (1 is not > 1)
      }
    literals:
      - 1
      - 2
      - 3
      - 1  # comparison value
    instruction_params:
      loop_params:
        - mode: "Every"
          collection: 0
          key_reg: 4
          value_reg: 5
          result_reg: 6
          body_start: 8
          loop_end: 12
    instructions:
      - "ArrayNew { dest: 0 }"              # Create input array [1, 2, 3] in register 0
      - "Load { dest: 1, literal_idx: 0 }"  # Load 1 into register 1
      - "ArrayPush { arr: 0, value: 1 }"    # Push 1 to array
      - "Load { dest: 2, literal_idx: 1 }"  # Load 2 into register 2
      - "ArrayPush { arr: 0, value: 2 }"    # Push 2 to array
      - "Load { dest: 3, literal_idx: 2 }"  # Load 3 into register 3
      - "ArrayPush { arr: 0, value: 3 }"    # Push 3 to array
      - "LoopStart { params_index: 0 }"     # Start universal loop using parameter table index 0
      - "Load { dest: 7, literal_idx: 3 }"  # Load comparison value 1 into register 7
      - "Gt { dest: 8, left: 5, right: 7 }" # Check if current value > 1
      - "AssertCondition { condition: 8 }"  # Assert the condition result for universal logic
      - "LoopNext { body_start: 8, loop_end: 12 }"  # Continue to next iteration or exit early on failure
      - "Return { value: 6 }"               # Return result (false since first element failed condition)
    want_result: false

  - note: universal_empty_collection
    description: Universal quantification on empty collection
    example_rego: |
      # Check if every element in empty array satisfies condition
      every x in [] {
        x > 0  # true (vacuously true - all 0 elements satisfy condition)
      }
    literals:
      - 0  # comparison value
    instruction_params:
      loop_params:
        - mode: "Every"
          collection: 0
          key_reg: 4
          value_reg: 5
          result_reg: 6
          body_start: 2
          loop_end: 5
    instructions:
      - "ArrayNew { dest: 0 }"              # Create empty input array in register 0
      - "LoopStart { params_index: 0 }"     # Start universal loop
      - "Load { dest: 7, literal_idx: 0 }"  # Load comparison value 0 into register 7
      - "Gt { dest: 8, left: 5, right: 7 }" # Check if current value > 0
      - "LoopNext { body_start: 2, loop_end: 5 }"  # Continue to next iteration
      - "Return { value: 6 }"               # Return result (true for empty collection - vacuous truth)
    want_result: true

  - note: universal_null_handling
    description: Universal quantification with null values
    example_rego: |
      # Test behavior with null values - should handle gracefully
      every x in [2, null, 4] {
        x != null  # false (null fails the condition)
      }
    literals:
      - 2
      - 4
    instruction_params:
      loop_params:
        - mode: "Every"
          collection: 0
          key_reg: 4
          value_reg: 5
          result_reg: 6
          body_start: 8
          loop_end: 12
    instructions:
      - "ArrayNew { dest: 0 }"              # Create input array in register 0
      - "Load { dest: 1, literal_idx: 0 }"  # Load 2
      - "ArrayPush { arr: 0, value: 1 }"    # Push 2 to array
      - "LoadNull { dest: 2 }"              # Load null value
      - "ArrayPush { arr: 0, value: 2 }"    # Push null to array
      - "Load { dest: 3, literal_idx: 1 }"  # Load 4
      - "ArrayPush { arr: 0, value: 3 }"    # Push 4 to array
      - "LoopStart { params_index: 0 }"     # Start universal loop
      - "LoadNull { dest: 7 }"              # Load null for comparison
      - "Ne { dest: 8, left: 5, right: 7 }" # Check if current value != null
      - "AssertCondition { condition: 8 }"  # Assert the condition result for universal logic
      - "LoopNext { body_start: 8, loop_end: 12 }"  # Continue to next iteration
      - "Return { value: 6 }"               # Return result
    want_result: false