// MIR Call Smoke Test 2: Closure creation
// Tests Closure callee type

using "lang/src/llvm_ir/instructions/mir_call.hako" as MirCallInst

static box Main {
  main() {
    print("=== MIR Call Smoke Test 2: closure_simple ===")

    // Simulate: |x, y| { x + y }
    local callee = new MapBox()
    callee.set("type", "Closure")

    local params = new ArrayBox()
    params.push(1)  // param x
    params.push(2)  // param y
    callee.set("params", params)

    local captures = new ArrayBox()
    captures.push(3)  // captured variable
    callee.set("captures", captures)

    local args = new ArrayBox()

    // Generate mir_call JSON
    local json = MirCallInst.lower_mir_call(null, callee, args, 4, null)

    // Verify JSON structure
    local has_mir_call = json.indexOf("\"op\":\"mir_call\"")
    if has_mir_call < 0 {
      print("ERROR: op not found")
      return 1
    }

    local has_closure = json.indexOf("\"type\":\"Closure\"")
    if has_closure < 0 {
      print("ERROR: Closure type not found")
      return 1
    }

    local has_params = json.indexOf("\"params\"")
    if has_params < 0 {
      print("ERROR: params not found")
      return 1
    }

    local has_captures = json.indexOf("\"captures\"")
    if has_captures < 0 {
      print("ERROR: captures not found")
      return 1
    }

    print("✓ PASS: closure_simple mir_call generated")
    print("Note: Actual execution requires C++ backend implementation")

    return 0
  }
}