if(NOT DEFINED PANO_CLI)
    message(FATAL_ERROR "PANO_CLI is required")
endif()

if(NOT DEFINED OUTPUT_PATH)
    message(FATAL_ERROR "OUTPUT_PATH is required")
endif()

if(NOT DEFINED EXPECTED_OUTPUT)
    message(FATAL_ERROR "EXPECTED_OUTPUT is required")
endif()

file(REMOVE "${OUTPUT_PATH}")

execute_process(
    COMMAND "${PANO_CLI}" save-project
        --path "${OUTPUT_PATH}"
        --width 64
        --height 32
        --layer-opacity nan
    RESULT_VARIABLE save_result
    OUTPUT_VARIABLE save_output
    ERROR_VARIABLE save_error)

if(save_result EQUAL 0)
    message(FATAL_ERROR "save-project unexpectedly succeeded: ${save_output}${save_error}")
endif()

string(FIND "${save_output}${save_error}" "${EXPECTED_OUTPUT}" expected_index)
if(expected_index EQUAL -1)
    message(FATAL_ERROR "save-project failure did not contain expected output: ${save_output}${save_error}")
endif()

if(EXISTS "${OUTPUT_PATH}")
    message(FATAL_ERROR "save-project created output despite rejected inputs: ${OUTPUT_PATH}")
endif()