"""Measure JSON validation, input normalization and strict XML construction separately.
Run from the repository root with its Python environment; artifacts are ignored.
"""
import json
from pathlib import Path
from statistics import median
from time import perf_counter_ns

from app.main import ReactFlowProjectPayload, build_reactflow_system_xml
from app.project_parameters import prepare_project


def measure(fn, repeat=200):
    for _ in range(10):
        fn()
    samples = []
    for _ in range(repeat):
        start = perf_counter_ns()
        fn()
        samples.append((perf_counter_ns() - start) / 1e6)
    samples.sort()
    return {"medianMs": median(samples), "p95Ms": samples[int(.95 * len(samples))], "samples": repeat}


def main():
    source = Path("tests/data/test-mql-8-corrected.json")
    raw = json.loads(source.read_text(encoding="utf-8"))
    current = ReactFlowProjectPayload.model_validate(raw)
    old = current.model_copy(deep=True)
    for node in old.nodes:
        node.data.modelVersion = "0.0.1"
    normalized, _ = prepare_project(current)
    metrics = {
        "source": str(source), "nodes": len(current.nodes),
        "parameters": sum(len(n.data.parameters) for n in current.nodes),
        "pydanticInput": measure(lambda: ReactFlowProjectPayload.model_validate(raw)),
        "prepareCurrent": measure(lambda: prepare_project(current)),
        "prepareAllOld": measure(lambda: prepare_project(old)),
        "strictXmlAfterPreparation": measure(lambda: build_reactflow_system_xml(normalized)),
        "notes": "prepare includes a defensive copy, parameter/expression/unit conversion, version comparison and simulation time normalization; not version checking alone.",
    }
    destination = Path("test/project-contract-20260912/backend-input-timing.json")
    destination.parent.mkdir(parents=True, exist_ok=True)
    destination.write_text(json.dumps(metrics, indent=2), encoding="utf-8")
    print(json.dumps(metrics, indent=2))


if __name__ == "__main__":
    main()