import argparse
import sys

from .checker import build_summary, check_service
from .classifier import Classifier
from .comparator import compare_versions
from .loader import load_dotenv, load_services_dir
from .notifier import send_matrix_message, send_uptime_kuma_ping
from .updater import run_update_script


def main() -> int:
    parser = argparse.ArgumentParser(description="Check for webservice updates")
    parser.add_argument("--services", default="services", help="Path to services directory")
    parser.add_argument("--all", action="store_true", help="Show all services")
    parser.add_argument("--timeout", type=float, default=10.0, help="HTTP timeout in seconds")
    parser.add_argument("--user-agent", default="service-update-alerts/1.0", help="HTTP user agent")
    parser.add_argument("--auto-update", action="store_true", help="Automatically update services when safe")
    parser.add_argument("--classify-timeout", type=float, default=300.0, help="Timeout for Ollama classification in seconds")
    parser.add_argument("--script-timeout", type=float, default=300.0, help="Timeout for auto-update scripts in seconds")
    args = parser.parse_args()

    load_dotenv()

    try:
        services = load_services_dir(args.services)
    except Exception as exc:
        print(f"Failed to load services: {exc}", file=sys.stderr)
        return 1

    results = [check_service(svc, args.timeout, args.user_agent) for svc in services.values()]

    output_lines = []
    for result in sorted(results, key=lambda r: r["name"].lower()):
        comparison = compare_versions(result["current"], result["latest"])
        has_update = comparison == 1
        if not args.all and not has_update:
            continue
        current = result["current"] or "unknown"
        latest = result["latest"] or "unknown"
        notes = []
        if comparison is None and result["current"] and result["latest"]:
            notes.append("unparseable")
        if result["current_error"]:
            notes.append("current error")
        if result["latest_error"]:
            notes.append("latest error")
        suffix = f" [{' '.join(notes)}]" if notes else ""
        output_lines.append(f"{result['name']}: {current} -> {latest}{suffix}")

    if output_lines:
        print("\n".join(output_lines))

    for result in sorted(results, key=lambda r: r["name"].lower()):
        if result["current_error"]:
            print(f"{result['name']}: current version error: {result['current_error']}", file=sys.stderr)
        if result["latest_error"]:
            print(f"{result['name']}: latest version error: {result['latest_error']}", file=sys.stderr)

    # Build one consolidated Matrix message
    matrix_sections = []

    if args.auto_update:
        classifier = Classifier()
        auto_updated = []
        manual_needed = []
        update_pending = []

        for result in results:
            if compare_versions(result["current"], result["latest"]) != 1:
                continue
            service = services[result["name"]]
            current = result["current"] or "unknown"
            latest = result["latest"] or "unknown"

            script = service.service_dir / "auto-update.sh" if service.service_dir else None
            if not script or not script.exists():
                update_pending.append(f"- {service.name}: {current} -> {latest}")
                continue

            classification = classifier.classify(
                service.service_dir,
                result.get("release_notes"),
                current,
                latest,
                timeout=args.classify_timeout,
            )
            if classification["action"] == "auto":
                script_result = run_update_script(script, current, latest, timeout=args.script_timeout)
                if script_result["success"]:
                    msg = f"- {service.name}: {current} -> {latest}\n  Reason: {classification['reason']}"
                    if script_result["output"]:
                        msg += f"\n  Output: {script_result['output']}"
                    auto_updated.append(msg)
                else:
                    msg = f"- {service.name}: {current} -> {latest}\n  Error: {script_result['error']}"
                    manual_needed.append(msg)
            else:
                msg = f"- {service.name}: {current} -> {latest}\n  Reason: {classification['reason']}"
                manual_needed.append(msg)

        if auto_updated:
            matrix_sections.append("Auto-updated:\n" + "\n".join(auto_updated))
        if manual_needed:
            matrix_sections.append("Manual update needed:\n" + "\n".join(manual_needed))
        if update_pending:
            matrix_sections.append("Updates available (no auto-update configured):\n" + "\n".join(update_pending))
    else:
        summary, should_notify = build_summary(results)
        if should_notify:
            matrix_sections.append(summary)

    errors = [r for r in results if r["current_error"] or r["latest_error"]]
    if errors:
        error_lines = []
        for r in errors:
            if r["current_error"]:
                error_lines.append(f"- {r['name']}: current version error")
            if r["latest_error"]:
                error_lines.append(f"- {r['name']}: latest version error")
        matrix_sections.append("Errors:\n" + "\n".join(error_lines))

    if matrix_sections:
        send_matrix_message("\n\n".join(matrix_sections), args.timeout)

    send_uptime_kuma_ping(args.timeout)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())