"""Tests unitaires pour src/viewer/helpers.py.

Couvre : filtres Jinja2, helpers de statistiques, fonctions utilitaires.
Pas de dépendance à Ollama ni au système de fichiers (sauf tmpdir).
"""

from __future__ import annotations

import re
from collections import Counter
from unittest.mock import patch, MagicMock

import pytest
from markupsafe import Markup

from src.config import (
    DossierMedical,
    Diagnostic,
    DPSelection,
    DPCandidate,
    ActeCCAM,
    CodeDecision,
    GHMEstimation,
    VetoReport,
    VetoIssue,
    CompletudeDossier,
    ControleCPAM,
    FinancialImpact,
    Sejour,
)
from src.viewer.helpers import (
    compute_group_stats,
    compute_dashboard_stats,
    compute_dim_synthesis,
    confidence_badge,
    confidence_label,
    severity_badge,
    cma_level_badge,
    format_duration,
    format_dossier_name,
    format_doc_name,
    decision_badge,
    format_cpam_text,
    human_where,
    _date_to_iso,
    _sort_qc_alerts,
    _compute_jours_restants,
)


# ── Helpers ────────────────────────────────────────────────────────────


def _item(dossier: DossierMedical, path_rel: str = "test/file.json") -> dict:
    """Crée un item de scan_dossiers minimal."""
    return {"name": "file", "path_rel": path_rel, "dossier": dossier}


def _diag(
    texte: str = "Diagnostic",
    code: str | None = None,
    confidence: str | None = None,
    est_cma: bool | None = None,
    decision: CodeDecision | None = None,
    cim10_final: str | None = None,
) -> Diagnostic:
    return Diagnostic(
        texte=texte,
        cim10_suggestion=code,
        cim10_confidence=confidence,
        est_cma=est_cma,
        cim10_decision=decision,
        cim10_final=cim10_final,
    )


# ===================================================================
# confidence_badge / confidence_label
# ===================================================================


class TestConfidenceBadge:
    def test_high(self):
        result = confidence_badge("high")
        assert isinstance(result, Markup)
        assert "Haute" in result
        assert "#16a34a" in result

    def test_medium(self):
        result = confidence_badge("medium")
        assert "Moyenne" in result

    def test_low(self):
        result = confidence_badge("low")
        assert "Basse" in result
        assert "#dc2626" in result

    def test_none_returns_empty(self):
        assert confidence_badge(None) == ""

    def test_empty_string_returns_empty(self):
        assert confidence_badge("") == ""

    def test_unknown_value_uses_default_colors(self):
        result = confidence_badge("unknown")
        assert "unknown" in result
        assert "#6b7280" in result  # default foreground


class TestConfidenceLabel:
    @pytest.mark.parametrize("value,expected", [
        ("high", "Haute"),
        ("medium", "Moyenne"),
        ("low", "Basse"),
        (None, ""),
        ("", ""),
        ("autre", "autre"),
    ])
    def test_labels(self, value, expected):
        assert confidence_label(value) == expected


# ===================================================================
# cma_level_badge
# ===================================================================


class TestCmaLevelBadge:
    def test_none_returns_empty(self):
        assert cma_level_badge(None) == ""

    def test_zero_returns_empty(self):
        assert cma_level_badge(0) == ""

    def test_negative_returns_empty(self):
        assert cma_level_badge(-1) == ""

    @pytest.mark.parametrize("level", [1, 2, 3, 4])
    def test_valid_levels(self, level):
        result = cma_level_badge(level)
        assert isinstance(result, Markup)
        assert f"CMA {level}" in result

    def test_level_above_4_capped(self):
        """Un niveau > 4 est cappé à 4."""
        result = cma_level_badge(5)
        assert "CMA 4" in result


# ===================================================================
# format_dossier_name / format_doc_name
# ===================================================================


class TestFormatDossierName:
    def test_racine(self):
        assert format_dossier_name("racine") == "Non classés"

    def test_normal_name(self):
        assert format_dossier_name("190_23139234") == "190_23139234"


class TestFormatDocName:
    @pytest.mark.parametrize("name,expected", [
        ("190_fusionne_cim10", "Fusionné"),
        ("CRH_23139234_cim10", "CRH"),
        ("CRO_23139234_cim10", "CRO"),
        ("crh_23139234", "CRH"),
        ("trackare-01295620", "Trackare"),
        ("ANAPATH_23103383", "Anapath"),
        ("some_other_doc", "some_other_doc"),
    ])
    def test_doc_names(self, name, expected):
        assert format_doc_name(name) == expected


# ===================================================================
# decision_badge
# ===================================================================


class TestDecisionBadge:
    def test_none_returns_empty(self):
        assert decision_badge(None) == ""

    def test_keep_returns_empty(self):
        """KEEP n'a pas de badge (cas par défaut)."""
        dec = CodeDecision(action="KEEP")
        assert decision_badge(dec) == ""

    @pytest.mark.parametrize("action,label", [
        ("DOWNGRADE", "Rétrogradé"),
        ("REMOVE", "Supprimé"),
        ("RULED_OUT", "Écarté"),
        ("NEED_INFO", "Preuve manquante"),
        ("PROMOTE_DP", "Promu en DP"),
    ])
    def test_action_labels(self, action, label):
        dec = CodeDecision(action=action)
        result = decision_badge(dec)
        assert label in result

    def test_dict_input(self):
        """Accepte un dict en plus d'un CodeDecision."""
        result = decision_badge({"action": "REMOVE"})
        assert "Supprimé" in result

    def test_dict_keep(self):
        result = decision_badge({"action": "KEEP"})
        assert result == ""

    def test_unknown_action(self):
        """Action inconnue affiche le texte brut."""
        result = decision_badge({"action": "CUSTOM_ACTION"})
        assert "CUSTOM_ACTION" in result


# ===================================================================
# human_where
# ===================================================================


class TestHumanWhere:
    @pytest.mark.parametrize("value,expected", [
        (None, "Global"),
        ("", "Global"),
        ("diagnostic_principal", "Diagnostic Principal"),
        ("diagnostics_associes", "Diagnostics Associés"),
        ("sejour", "Séjour"),
        ("diagnostics_associes[0]", "DAS n°1"),
        ("diagnostics_associes[5]", "DAS n°6"),
        ("actes_ccam[0]", "Acte n°1"),
        ("actes_ccam[2]", "Acte n°3"),
        ("autre_chose", "autre_chose"),
    ])
    def test_conversions(self, value, expected):
        assert human_where(value) == expected


# ===================================================================
# _date_to_iso
# ===================================================================


class TestDateToIso:
    def test_valid_date(self):
        assert _date_to_iso("15/03/2025") == "2025-03-15"

    def test_invalid_format(self):
        assert _date_to_iso("2025-03-15") == ""

    def test_empty_string(self):
        assert _date_to_iso("") == ""

    def test_single_part(self):
        assert _date_to_iso("15") == ""


# ===================================================================
# _sort_qc_alerts
# ===================================================================


class TestSortQcAlerts:
    def test_critical_first(self):
        alerts = [
            "Recommandation : ajouter un DAS",
            "Erreur critique : code invalide",
            "Code justifié solidement",
        ]
        sorted_alerts = _sort_qc_alerts(alerts)
        assert sorted_alerts[0] == "Erreur critique : code invalide"
        assert sorted_alerts[-1] == "Code justifié solidement"

    def test_empty_list(self):
        assert _sort_qc_alerts([]) == []

    def test_dp_prioritized_within_tier(self):
        """Les alertes mentionnant le DP sont priorisées dans leur tier."""
        alerts = [
            "Redondance dans DAS",
            "Redondance DP diagnostic principal suspect",
        ]
        sorted_alerts = _sort_qc_alerts(alerts)
        assert "DP" in sorted_alerts[0] or "diagnostic principal" in sorted_alerts[0]


# ===================================================================
# _compute_jours_restants
# ===================================================================


class TestComputeJoursRestants:
    def test_no_date(self):
        ctrl = MagicMock()
        ctrl.date_limite_reponse = None
        assert _compute_jours_restants(ctrl) is None

    def test_invalid_date(self):
        ctrl = MagicMock()
        ctrl.date_limite_reponse = "not-a-date"
        assert _compute_jours_restants(ctrl) is None

    def test_valid_date_returns_int(self):
        ctrl = MagicMock()
        ctrl.date_limite_reponse = "15/03/2030"
        result = _compute_jours_restants(ctrl)
        assert isinstance(result, int)
        assert result > 0  # well into the future


# ===================================================================
# compute_group_stats
# ===================================================================


class TestComputeGroupStats:
    def test_empty_items(self):
        stats = compute_group_stats([])
        assert stats == {"das_count": 0, "alertes_count": 0, "actes_count": 0, "cma_count": 0}

    def test_cma_counted_on_dp(self):
        """CMA sur le DP est compté."""
        d = DossierMedical(
            diagnostic_principal=_diag("DP", "K85.9", est_cma=True),
        )
        stats = compute_group_stats([_item(d)])
        assert stats["cma_count"] == 1

    def test_multiple_items(self):
        d1 = DossierMedical(
            diagnostics_associes=[_diag("DAS1", "I10", est_cma=True)],
            actes_ccam=[ActeCCAM(texte="Acte1")],
            alertes_codage=["Alerte"],
        )
        d2 = DossierMedical(
            diagnostics_associes=[_diag("DAS2", "E11.9"), _diag("DAS3", "J18.9", est_cma=True)],
        )
        stats = compute_group_stats([_item(d1), _item(d2)])
        assert stats["das_count"] == 3
        assert stats["actes_count"] == 1
        assert stats["alertes_count"] == 1
        assert stats["cma_count"] == 2


# ===================================================================
# compute_dashboard_stats
# ===================================================================


class TestComputeDashboardStats:
    def test_empty_groups(self):
        stats = compute_dashboard_stats({})
        assert stats["total_dossiers"] == 0
        assert stats["total_fichiers"] == 0
        assert stats["top_codes"] == []
        assert stats["processing_time_avg"] == 0

    def test_single_dossier(self):
        d = DossierMedical(
            diagnostic_principal=_diag("DP", "K85.9", confidence="high"),
            diagnostics_associes=[_diag("DAS", code="I10")],
            actes_ccam=[ActeCCAM(texte="Acte")],
            alertes_codage=["Alerte"],
            processing_time_s=10.5,
        )
        groups = {"grp1": [_item(d)]}
        stats = compute_dashboard_stats(groups)
        assert stats["total_dossiers"] == 1
        assert stats["total_fichiers"] == 1
        assert stats["total_das"] == 1
        assert stats["total_actes"] == 1
        assert stats["total_alertes"] == 1
        assert stats["processing_time_avg"] == 10.5

    def test_dp_validity_absent_when_no_dp(self):
        d = DossierMedical()
        groups = {"grp": [_item(d)]}
        stats = compute_dashboard_stats(groups)
        assert stats["dp_validity"].get("absent", 0) == 1

    def test_ghm_types_counted(self):
        d = DossierMedical(
            ghm_estimation=GHMEstimation(type_ghm="C", severite=3),
        )
        groups = {"grp": [_item(d)]}
        stats = compute_dashboard_stats(groups)
        assert stats["ghm_types"].get("C") == 1
        assert stats["severity_dist"].get(3) == 1


# ===================================================================
# compute_dim_synthesis
# ===================================================================


class TestComputeDimSynthesis:
    def test_empty_groups(self):
        result = compute_dim_synthesis({})
        assert result["dp"]["total"] == 0
        assert result["das"]["total"] == 0
        assert result["veto"]["avg_score"] == 0

    def test_dp_confirmed(self):
        d = DossierMedical(
            dp_final=DPSelection(
                chosen_code="K85.9",
                verdict="CONFIRMED",
                confidence="high",
                evidence=["Test evidence"],
            ),
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["dp"]["total"] == 1
        assert result["dp"]["confirmed"] == 1

    def test_dp_review_creates_alert(self):
        d = DossierMedical(
            dp_final=DPSelection(
                chosen_code="R10.4",
                verdict="REVIEW",
                confidence="medium",
                reason="Ambigu",
                evidence=[],
            ),
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["dp"]["review"] == 1
        assert len(result["alertes"]["review"]) == 1

    def test_das_decisions_counted(self):
        d = DossierMedical(
            diagnostics_associes=[
                _diag("DAS1", "I10", decision=CodeDecision(action="KEEP")),
                _diag("DAS2", "D69.6", decision=CodeDecision(action="RULED_OUT")),
                _diag("DAS3", "D50", decision=CodeDecision(action="DOWNGRADE", final_code="D64.9")),
                _diag("DAS4", "Z87.1", decision=CodeDecision(action="REMOVE")),
            ],
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["das"]["total"] == 4
        assert result["das"]["kept"] == 1
        assert result["das"]["ruled_out"] == 1
        assert result["das"]["downgraded"] == 1
        assert result["das"]["removed"] == 1

    def test_das_no_decision_counted_as_kept(self):
        d = DossierMedical(
            diagnostics_associes=[_diag("DAS", "I10")],  # no decision
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["das"]["kept"] == 1

    def test_veto_report_aggregated(self):
        d = DossierMedical(
            veto_report=VetoReport(
                verdict="FAIL",
                score_contestabilite=40,
                issues=[
                    VetoIssue(veto="VETO-01", severity="HARD", where="dp", message="test"),
                ],
            ),
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["veto"]["avg_score"] == 40
        assert result["veto"]["distribution"].get("FAIL") == 1
        assert len(result["alertes"]["fail"]) == 1

    def test_completude_indefendable(self):
        d = DossierMedical(
            completude=CompletudeDossier(
                verdict_global="indefendable",
                score_global=20,
                documents_manquants=["CRO", "Anapath"],
            ),
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["completude"]["distribution"].get("indefendable") == 1
        assert len(result["alertes"]["indefendable"]) == 1

    def test_taux_modification_zero_when_no_das(self):
        result = compute_dim_synthesis({})
        assert result["das"]["taux_modification"] == 0

    def test_cpam_impact(self):
        d = DossierMedical(
            controles_cpam=[
                ControleCPAM(
                    numero_ogc=1,
                    financial_impact=FinancialImpact(
                        impact_estime_euros=1500,
                        priorite="haute",
                    ),
                    validation_dim="valide",
                ),
            ],
        )
        groups = {"grp": [_item(d)]}
        result = compute_dim_synthesis(groups)
        assert result["cpam"]["total"] == 1
        assert result["cpam"]["impact_total"] == 1500
        assert result["cpam"]["by_priority"].get("haute") == 1
        assert result["cpam"]["by_status"].get("valide") == 1


# ===================================================================
# format_cpam_text (additional edge cases beyond test_viewer.py)
# ===================================================================


class TestFormatCpamTextExtra:
    def test_blank_lines_produce_br(self):
        result = format_cpam_text("Line 1\n\nLine 2")
        assert "<br>" in result

    def test_list_closed_at_end(self):
        """A list not followed by text should still be closed."""
        result = format_cpam_text("- Item 1\n- Item 2")
        assert result.count("<ul") == 1
        assert result.count("</ul>") == 1