#!/usr/bin/env python3
"""Test de non-régression : compare baseline vs nouvelle sortie.

Usage:
    python regression_tests/check_regression.py [--rerun]

Sans --rerun : compare baseline/ vs current output (anonymise_audit_30/)
Avec --rerun : relance l'anonymisation puis compare
"""
import json
import re
import sys
from collections import Counter
from pathlib import Path

BASELINE_DIR = Path(__file__).parent / "baseline"
OUTPUT_DIR = Path("/home/dom/Téléchargements/II-1 Ctrl_T2A_2025_CHCB_DocJustificatifs (1)/anonymise_audit_30")

# === Patterns de fuites connues ===
LEAK_CHECKS = {
    "NDA_footer": re.compile(r"Episode\s+N[o°.]?\s*\.?\s*:\s*(\d{5,})"),
    "ONDANSETRON_broken": re.compile(r"O\[DOSSIER\]"),
    "RPPS_raw": re.compile(r"\b[12]\d{10}\b"),  # 11 chiffres commençant par 1 ou 2
    "bracket_double": re.compile(r"\[\["),
    "www_hospital": re.compile(r"www\.ch-cote-basque"),
    "FINESS_raw": re.compile(r"\b640000162\b"),
}

# === Termes médicaux qui NE doivent PAS être masqués ===
FALSE_POSITIVE_CHECKS = {
    "AINS_masked": re.compile(r"\[NOM\].*(?:céphalée|paracétamol)|paracétamol.*\[NOM\]", re.I),
    "ponction_masked": re.compile(r"\[NOM\]\s+lombaire", re.I),
    "hanche_masked": re.compile(r"(?:de\s+la|de)\s+\[NOM\].*(?:profil|opérée|fémorale)", re.I),
    "ORL_masked": re.compile(r"IRM\s+\[NOM\]", re.I),
    "burkitt_masked": re.compile(r"\[NOM\]\s*\.\s*(?:stade|type|lymphome)?", re.I),
}

PLACEHOLDER_RE = re.compile(r"\[(NOM|TEL|EMAIL|NIR|IPP|DOSSIER|NDA|EPISODE|RPPS|DATE_NAISSANCE|ADRESSE|CODE_POSTAL|VILLE|MASK|FINESS|OGC|AGE|ETABLISSEMENT|IBAN)\]")


def analyze_file(txt_path: Path) -> dict:
    """Analyse un fichier pseudonymisé et retourne les métriques."""
    text = txt_path.read_text(encoding="utf-8", errors="replace")
    lines = text.splitlines()

    result = {
        "file": txt_path.name,
        "lines": len(lines),
        "chars": len(text),
        "empty": len(text.strip()) == 0,
    }

    # Comptage des placeholders
    ph_counts = Counter()
    for m in PLACEHOLDER_RE.finditer(text):
        ph_counts[m.group(1)] += 1
    result["placeholders"] = dict(ph_counts)
    result["total_placeholders"] = sum(ph_counts.values())

    # Détection de fuites
    leaks = {}
    for name, pattern in LEAK_CHECKS.items():
        matches = pattern.findall(text)
        if matches:
            leaks[name] = len(matches)
    result["leaks"] = leaks
    result["total_leaks"] = sum(leaks.values())

    # Détection de faux positifs
    fps = {}
    for name, pattern in FALSE_POSITIVE_CHECKS.items():
        matches = pattern.findall(text)
        if matches:
            fps[name] = len(matches)
    result["false_positives"] = fps
    result["total_fps"] = sum(fps.values())

    return result


def compare_reports(baseline_report: dict, new_report: dict) -> dict:
    """Compare deux rapports et identifie régressions/améliorations."""
    changes = {
        "improved_leaks": [],
        "regressed_leaks": [],
        "improved_fps": [],
        "regressed_fps": [],
        "placeholder_delta": {},
    }

    # Comparer les fuites
    all_leak_keys = set(baseline_report["leaks"].keys()) | set(new_report["leaks"].keys())
    for k in all_leak_keys:
        old = baseline_report["leaks"].get(k, 0)
        new = new_report["leaks"].get(k, 0)
        if new < old:
            changes["improved_leaks"].append((k, old, new))
        elif new > old:
            changes["regressed_leaks"].append((k, old, new))

    # Comparer les FP
    all_fp_keys = set(baseline_report["false_positives"].keys()) | set(new_report["false_positives"].keys())
    for k in all_fp_keys:
        old = baseline_report["false_positives"].get(k, 0)
        new = new_report["false_positives"].get(k, 0)
        if new < old:
            changes["improved_fps"].append((k, old, new))
        elif new > old:
            changes["regressed_fps"].append((k, old, new))

    # Comparer les placeholders
    all_ph = set(baseline_report["placeholders"].keys()) | set(new_report["placeholders"].keys())
    for k in all_ph:
        old = baseline_report["placeholders"].get(k, 0)
        new = new_report["placeholders"].get(k, 0)
        if old != new:
            changes["placeholder_delta"][k] = new - old

    return changes


def main():
    rerun = "--rerun" in sys.argv

    if rerun:
        print("=== Relance de l'anonymisation des 30 fichiers ===\n")
        import subprocess
        result = subprocess.run(
            [sys.executable, "run_batch_30_audit.py"],
            cwd=str(Path(__file__).parent.parent),
            capture_output=False,
        )
        if result.returncode != 0:
            print("ERREUR: batch échoué")
            sys.exit(1)
        print()

    # Analyser la baseline
    baseline_files = sorted(BASELINE_DIR.glob("*.pseudonymise.txt"))
    new_files = sorted(OUTPUT_DIR.glob("*.pseudonymise.txt"))

    if not baseline_files:
        print("ERREUR: pas de fichiers baseline trouvés")
        sys.exit(1)

    print(f"=== RAPPORT DE NON-RÉGRESSION ===")
    print(f"Baseline: {len(baseline_files)} fichiers")
    print(f"Nouveau:  {len(new_files)} fichiers\n")

    # Rapport par fichier
    baseline_reports = {}
    new_reports = {}

    for f in baseline_files:
        baseline_reports[f.name] = analyze_file(f)
    for f in new_files:
        new_reports[f.name] = analyze_file(f)

    # === Métriques globales baseline ===
    total_leaks_baseline = sum(r["total_leaks"] for r in baseline_reports.values())
    total_fps_baseline = sum(r["total_fps"] for r in baseline_reports.values())
    total_ph_baseline = sum(r["total_placeholders"] for r in baseline_reports.values())
    empty_baseline = sum(1 for r in baseline_reports.values() if r["empty"])

    total_leaks_new = sum(r["total_leaks"] for r in new_reports.values())
    total_fps_new = sum(r["total_fps"] for r in new_reports.values())
    total_ph_new = sum(r["total_placeholders"] for r in new_reports.values())
    empty_new = sum(1 for r in new_reports.values() if r["empty"])

    print("--- MÉTRIQUES GLOBALES ---")
    print(f"{'Métrique':<30} {'Baseline':>10} {'Nouveau':>10} {'Delta':>10}")
    print("-" * 62)

    def delta_str(old, new):
        d = new - old
        if d > 0:
            return f"+{d}"
        return str(d)

    print(f"{'Fuites détectées':<30} {total_leaks_baseline:>10} {total_leaks_new:>10} {delta_str(total_leaks_baseline, total_leaks_new):>10}")
    print(f"{'Faux positifs détectés':<30} {total_fps_baseline:>10} {total_fps_new:>10} {delta_str(total_fps_baseline, total_fps_new):>10}")
    print(f"{'Total placeholders':<30} {total_ph_baseline:>10} {total_ph_new:>10} {delta_str(total_ph_baseline, total_ph_new):>10}")
    print(f"{'Fichiers vides':<30} {empty_baseline:>10} {empty_new:>10} {delta_str(empty_baseline, empty_new):>10}")

    # Détail des fuites par type
    all_leak_types = set()
    for r in list(baseline_reports.values()) + list(new_reports.values()):
        all_leak_types.update(r["leaks"].keys())

    if all_leak_types:
        print("\n--- FUITES PAR TYPE ---")
        print(f"{'Type':<30} {'Baseline':>10} {'Nouveau':>10} {'Delta':>10}")
        print("-" * 62)
        for lt in sorted(all_leak_types):
            old = sum(r["leaks"].get(lt, 0) for r in baseline_reports.values())
            new = sum(r["leaks"].get(lt, 0) for r in new_reports.values())
            marker = " ✓" if new < old else (" ✗" if new > old else "")
            print(f"{lt:<30} {old:>10} {new:>10} {delta_str(old, new):>10}{marker}")

    # Détail des FP par type
    all_fp_types = set()
    for r in list(baseline_reports.values()) + list(new_reports.values()):
        all_fp_types.update(r["false_positives"].keys())

    if all_fp_types:
        print("\n--- FAUX POSITIFS PAR TYPE ---")
        print(f"{'Type':<30} {'Baseline':>10} {'Nouveau':>10} {'Delta':>10}")
        print("-" * 62)
        for ft in sorted(all_fp_types):
            old = sum(r["false_positives"].get(ft, 0) for r in baseline_reports.values())
            new = sum(r["false_positives"].get(ft, 0) for r in new_reports.values())
            marker = " ✓" if new < old else (" ✗" if new > old else "")
            print(f"{ft:<30} {old:>10} {new:>10} {delta_str(old, new):>10}{marker}")

    # Fichiers avec régressions
    regressions = []
    improvements = []
    for fname in sorted(set(baseline_reports.keys()) & set(new_reports.keys())):
        changes = compare_reports(baseline_reports[fname], new_reports[fname])
        if changes["regressed_leaks"]:
            regressions.append((fname, changes))
        if changes["improved_leaks"] or changes["improved_fps"]:
            improvements.append((fname, changes))

    if regressions:
        print(f"\n⚠ RÉGRESSIONS ({len(regressions)} fichiers):")
        for fname, changes in regressions:
            for k, old, new in changes["regressed_leaks"]:
                print(f"  {fname}: {k} {old}→{new} (+{new-old})")

    if improvements:
        print(f"\n✓ AMÉLIORATIONS ({len(improvements)} fichiers):")
        for fname, changes in improvements:
            for k, old, new in changes["improved_leaks"]:
                print(f"  {fname}: {k} {old}→{new} (-{old-new})")
            for k, old, new in changes["improved_fps"]:
                print(f"  {fname}: FP {k} {old}→{new} (-{old-new})")

    # Verdict final
    print("\n" + "=" * 62)
    if total_leaks_new > total_leaks_baseline:
        print("❌ RÉGRESSION : plus de fuites qu'avant")
        sys.exit(1)
    elif total_leaks_new < total_leaks_baseline:
        print(f"✅ AMÉLIORATION : {total_leaks_baseline - total_leaks_new} fuites en moins")
    else:
        print("➡ NEUTRE : même nombre de fuites")

    if total_fps_new < total_fps_baseline:
        print(f"✅ AMÉLIORATION : {total_fps_baseline - total_fps_new} faux positifs en moins")
    elif total_fps_new > total_fps_baseline:
        print(f"⚠ ATTENTION : {total_fps_new - total_fps_baseline} faux positifs en plus")

    sys.exit(0)


if __name__ == "__main__":
    main()