// tools/hako_shared/tests/json_parser_program_test.hako
// Test for ProgramJSONBox (Phase 172)
// Note: This test uses a simplified inline approach without 'using'
// The actual json_parser.hako should be tested via direct Rust VM execution

static box Main {
  _test_parse_program() {
    // Simulating parse_program behavior inline for testing
    // In real usage, this would be: JsonParserBox.parse_program(json_str)
    return 1
  }

  main(args) {
    print("[TEST] ProgramJSONBox parse_program() test (simplified)")

    // Test 1: Valid Program JSON v0
    local json1 = "{\"version\":0,\"kind\":\"Program\",\"defs\":[],\"meta\":{\"usings\":[\"nyashstd\"]}}"
    local prog1 = JsonParserBox.parse_program(json1)

    if prog1 == null {
      print("[FAIL] Test 1: parse_program returned null")
      return 1
    }

    local version = prog1.get_version()
    if version != 0 {
      print("[FAIL] Test 1: version should be 0, got " + ("" + version))
      return 1
    }

    local kind = prog1.get_kind()
    if kind != "Program" {
      print("[FAIL] Test 1: kind should be Program, got " + kind)
      return 1
    }

    local defs = prog1.get_defs()
    if defs == null {
      print("[FAIL] Test 1: defs should not be null")
      return 1
    }

    local usings = prog1.get_usings()
    if usings == null {
      print("[FAIL] Test 1: usings should not be null")
      return 1
    }

    if usings.size() != 1 {
      print("[FAIL] Test 1: usings should have 1 element, got " + ("" + usings.size()))
      return 1
    }

    local using_val = usings.get(0)
    if using_val != "nyashstd" {
      print("[FAIL] Test 1: first using should be nyashstd, got " + using_val)
      return 1
    }

    print("[PASS] Test 1: Valid Program JSON v0")

    // Test 2: Invalid JSON (not an object)
    local json2 = "[1,2,3]"
    local prog2 = JsonParserBox.parse_program(json2)

    if prog2 != null {
      print("[FAIL] Test 2: parse_program should return null for array")
      return 1
    }

    print("[PASS] Test 2: Invalid JSON (array)")

    // Test 3: Missing version field
    local json3 = "{\"kind\":\"Program\",\"defs\":[]}"
    local prog3 = JsonParserBox.parse_program(json3)

    if prog3 != null {
      print("[FAIL] Test 3: parse_program should return null for missing version")
      return 1
    }

    print("[PASS] Test 3: Missing version field")

    // Test 4: Wrong kind
    local json4 = "{\"version\":0,\"kind\":\"Module\",\"defs\":[]}"
    local prog4 = JsonParserBox.parse_program(json4)

    if prog4 != null {
      print("[FAIL] Test 4: parse_program should return null for wrong kind")
      return 1
    }

    print("[PASS] Test 4: Wrong kind")

    // Test 5: Complex Program JSON
    local json5 = "{\"version\":0,\"kind\":\"Program\",\"defs\":[{\"type\":\"Box\",\"name\":\"Main\"},{\"type\":\"Method\",\"name\":\"main\"}],\"meta\":{\"usings\":[\"nyashstd\",\"mylib\"]}}"
    local prog5 = JsonParserBox.parse_program(json5)

    if prog5 == null {
      print("[FAIL] Test 5: parse_program returned null")
      return 1
    }

    local defs5 = prog5.get_defs()
    if defs5.size() != 2 {
      print("[FAIL] Test 5: defs should have 2 elements, got " + ("" + defs5.size()))
      return 1
    }

    local usings5 = prog5.get_usings()
    if usings5.size() != 2 {
      print("[FAIL] Test 5: usings should have 2 elements, got " + ("" + usings5.size()))
      return 1
    }

    print("[PASS] Test 5: Complex Program JSON")

    print("[SUCCESS] All ProgramJSONBox tests passed!")
    return 0
  }
}