"""Pytest subprocess runner + in-memory result storage."""
from __future__ import annotations

import asyncio
import json
import logging
import os
import time
from collections import OrderedDict
from pathlib import Path

log = logging.getLogger(__name__)

# In-memory state
_last_result: dict | None = None
_running: bool = False

# Each service group runs in its own pytest subprocess with its own PYTHONPATH
_SERVICE_GROUPS: list[dict] = [
    {"name": "shared", "dirs": ["shared/tests/", "shared/sexp/tests/"],
     "pythonpath": None},
    {"name": "blog", "dirs": ["blog/tests/"], "pythonpath": "/app/blog"},
    {"name": "market", "dirs": ["market/tests/"], "pythonpath": "/app/market"},
    {"name": "cart", "dirs": ["cart/tests/"], "pythonpath": "/app/cart"},
    {"name": "events", "dirs": ["events/tests/"], "pythonpath": "/app/events"},
    {"name": "account", "dirs": ["account/tests/"], "pythonpath": "/app/account"},
    {"name": "orders", "dirs": ["orders/tests/"], "pythonpath": "/app/orders"},
    {"name": "federation", "dirs": ["federation/tests/"],
     "pythonpath": "/app/federation"},
    {"name": "relations", "dirs": ["relations/tests/"],
     "pythonpath": "/app/relations"},
    {"name": "likes", "dirs": ["likes/tests/"], "pythonpath": "/app/likes"},
]

_SERVICE_ORDER = [g["name"] for g in _SERVICE_GROUPS]
_REPORT_PATH = "/tmp/test-report-{}.json"


def _parse_report(path: str) -> tuple[list[dict], dict]:
    """Parse a pytest-json-report file."""
    rp = Path(path)
    if not rp.exists():
        return [], {}
    try:
        report = json.loads(rp.read_text())
    except (json.JSONDecodeError, OSError):
        return [], {}

    summary = report.get("summary", {})
    tests_raw = report.get("tests", [])

    tests = []
    for t in tests_raw:
        tests.append({
            "nodeid": t.get("nodeid", ""),
            "outcome": t.get("outcome", "unknown"),
            "duration": round(t.get("duration", 0), 4),
            "longrepr": (t.get("call", {}) or {}).get("longrepr", ""),
        })
    return tests, summary


async def _run_group(group: dict) -> tuple[list[dict], dict, str]:
    """Run pytest for a single service group."""
    existing = [d for d in group["dirs"] if Path(f"/app/{d}").is_dir()]
    if not existing:
        return [], {}, ""

    report_file = _REPORT_PATH.format(group["name"])
    cmd = [
        "python3", "-m", "pytest",
        *existing,
        "--json-report",
        f"--json-report-file={report_file}",
        "-q",
        "--tb=short",
    ]
    env = {**os.environ}
    if group["pythonpath"]:
        env["PYTHONPATH"] = group["pythonpath"] + ":" + env.get("PYTHONPATH", "")

    proc = await asyncio.create_subprocess_exec(
        *cmd,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.STDOUT,
        cwd="/app",
        env=env,
    )
    stdout, _ = await proc.communicate()
    stdout_str = (stdout or b"").decode("utf-8", errors="replace")
    tests, summary = _parse_report(report_file)
    return tests, summary, stdout_str


async def run_tests() -> dict:
    """Run pytest in subprocess, parse JSON report, store results."""
    global _last_result, _running

    if _running:
        return {"status": "already_running"}

    _running = True
    started_at = time.time()

    try:
        tasks = [_run_group(g) for g in _SERVICE_GROUPS]
        results = await asyncio.gather(*tasks, return_exceptions=True)

        all_tests: list[dict] = []
        total_passed = total_failed = total_errors = total_skipped = total_count = 0
        all_stdout: list[str] = []

        for i, res in enumerate(results):
            if isinstance(res, Exception):
                log.error("Group %s failed: %s", _SERVICE_GROUPS[i]["name"], res)
                continue
            tests, summary, stdout_str = res
            all_tests.extend(tests)
            total_passed += summary.get("passed", 0)
            total_failed += summary.get("failed", 0)
            total_errors += summary.get("error", 0)
            total_skipped += summary.get("skipped", 0)
            total_count += summary.get("total", len(tests))
            if stdout_str.strip():
                all_stdout.append(stdout_str)

        finished_at = time.time()
        status = "failed" if total_failed > 0 or total_errors > 0 else "passed"

        _last_result = {
            "status": status,
            "started_at": started_at,
            "finished_at": finished_at,
            "duration": round(finished_at - started_at, 2),
            "passed": total_passed,
            "failed": total_failed,
            "errors": total_errors,
            "skipped": total_skipped,
            "total": total_count,
            "tests": all_tests,
            "stdout": "\n".join(all_stdout)[-5000:],
        }

        log.info(
            "Test run complete: %s (%d passed, %d failed, %d errors, %.1fs)",
            status, total_passed, total_failed, total_errors,
            _last_result["duration"],
        )
        return _last_result

    except Exception:
        log.exception("Test run failed")
        finished_at = time.time()
        _last_result = {
            "status": "error",
            "started_at": started_at,
            "finished_at": finished_at,
            "duration": round(finished_at - started_at, 2),
            "passed": 0,
            "failed": 0,
            "errors": 1,
            "skipped": 0,
            "total": 0,
            "tests": [],
            "stdout": "",
        }
        return _last_result
    finally:
        _running = False


def get_results() -> dict | None:
    """Return last run results."""
    return _last_result


def get_test(nodeid: str) -> dict | None:
    """Look up a single test by nodeid."""
    if not _last_result:
        return None
    for t in _last_result["tests"]:
        if t["nodeid"] == nodeid:
            return t
    return None


def is_running() -> bool:
    """Check if tests are currently running."""
    return _running


def _service_from_nodeid(nodeid: str) -> str:
    """Extract service name from a test nodeid."""
    parts = nodeid.split("/")
    return parts[0] if len(parts) >= 2 else "other"


def group_tests_by_service(tests: list[dict]) -> list[dict]:
    """Group tests into ordered sections by service."""
    buckets: dict[str, list[dict]] = OrderedDict()
    for svc in _SERVICE_ORDER:
        buckets[svc] = []
    for t in tests:
        svc = _service_from_nodeid(t["nodeid"])
        if svc not in buckets:
            buckets[svc] = []
        buckets[svc].append(t)

    sections = []
    for svc, svc_tests in buckets.items():
        if not svc_tests:
            continue
        sections.append({
            "service": svc,
            "tests": svc_tests,
            "total": len(svc_tests),
            "passed": sum(1 for t in svc_tests if t["outcome"] == "passed"),
            "failed": sum(1 for t in svc_tests if t["outcome"] == "failed"),
            "errors": sum(1 for t in svc_tests if t["outcome"] == "error"),
            "skipped": sum(1 for t in svc_tests if t["outcome"] == "skipped"),
        })
    return sections