"""
API PCN + PRONOTE — HuggingFace Spaces Free Tier
Endpoints REST pour scraper ENT Paris Classe Numérique et PRONOTE.
"""

from __future__ import annotations

import os
import logging
from datetime import datetime, timezone
from typing import Optional
from enum import Enum

from fastapi import FastAPI, HTTPException, Query, Depends
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel, Field

from pcn import Config as PCNConfig, ENTClient
from pronote_client import Config as PronoteConfig, PronoteClient

logging.basicConfig(level=logging.INFO, format="[%(levelname)s] %(message)s")
log = logging.getLogger("api")

app = FastAPI(
    title="PCN + PRONOTE API",
    description="API REST pour récupérer notifications, messages, notes, devoirs, EDT depuis ENT PCN et PRONOTE.",
    version="1.0.0",
    docs_url="/",
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["*"],
    allow_headers=["*"],
)


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  Modèles Pydantic
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


class Credentials(BaseModel):
    login: str = Field(..., description="Identifiant")
    password: str = Field(..., description="Mot de passe")


class PCNRequest(Credentials):
    hours: int = Field(24, ge=1, le=720, description="Fenêtre temporelle en heures")
    fetch_body: bool = Field(True, description="Récupérer le corps des messages")
    fetch_attachments: bool = Field(False, description="Télécharger les pièces jointes")


class PronoteRequest(Credentials):
    pronote_url: str = Field(..., description="URL PRONOTE élève")
    ent: str = Field("", description="ENT (ex: ent_parisclassenumerique, vide=direct)")
    hours: int = Field(168, ge=1, le=2160, description="Fenêtre temporelle en heures")
    fetch_attachments: bool = Field(False, description="Télécharger les pièces jointes")


class PronoteModules(str, Enum):
    grades = "grades"
    homework = "homework"
    timetable = "timetable"
    messages = "messages"
    absences = "absences"
    info = "info"


class NotifFilter(str, Enum):
    MESSAGERIE = "MESSAGERIE"
    BLOG = "BLOG"
    ACTUALITES = "ACTUALITES"
    EXERCIZER = "EXERCIZER"
    COMMUNITIES = "COMMUNITIES"
    WIKI = "WIKI"
    SCRAPBOOK = "SCRAPBOOK"
    TIMELINEGENERATOR = "TIMELINEGENERATOR"


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  Helpers
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


def _pcn_client(req: PCNRequest) -> ENTClient:
    cfg = PCNConfig()
    cfg.login = req.login
    cfg.password = req.password
    cfg.hours_back = req.hours
    cfg.fetch_body = req.fetch_body
    cfg.fetch_attachments = req.fetch_attachments
    client = ENTClient(cfg)
    try:
        client.login()
    except SystemExit:
        raise HTTPException(401, "Échec connexion PCN — identifiants invalides")
    except Exception as e:
        raise HTTPException(502, f"Erreur connexion PCN : {e}")
    return client


def _pronote_client(req: PronoteRequest) -> PronoteClient:
    cfg = PronoteConfig()
    cfg.pronote_url = req.pronote_url
    cfg.login = req.login
    cfg.password = req.password
    cfg.ent = req.ent
    cfg.hours_back = req.hours
    cfg.fetch_attachments = req.fetch_attachments
    cfg.dry_run = not req.fetch_attachments
    client = PronoteClient(cfg)
    try:
        client.login()
    except SystemExit:
        raise HTTPException(401, "Échec connexion PRONOTE — identifiants ou URL invalides")
    except Exception as e:
        raise HTTPException(502, f"Erreur connexion PRONOTE : {e}")
    return client


def _serialize(obj):
    """Convertit dataclasses en dicts récursivement."""
    from dataclasses import asdict, is_dataclass
    if is_dataclass(obj):
        return asdict(obj)
    if isinstance(obj, list):
        return [_serialize(x) for x in obj]
    return obj


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  Health
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


@app.get("/health", tags=["Système"])
def health():
    return {"status": "ok", "timestamp": datetime.now(timezone.utc).isoformat()}


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  PCN — Endpoints
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


@app.post("/pcn/all", tags=["PCN"], summary="Tout récupérer (notifications + messages)")
def pcn_all(req: PCNRequest):
    client = _pcn_client(req)
    try:
        notifs = client.fetch_notifications()
        raw = client.fetch_messages()
        msgs = client.process(raw)
        report = client.build_report(notifs, msgs)
        return _serialize(report)
    finally:
        client.close()


@app.post("/pcn/notifications", tags=["PCN"], summary="Notifications récentes")
def pcn_notifications(
    req: PCNRequest,
    type_filter: Optional[list[NotifFilter]] = Query(None, alias="type", description="Filtrer par type"),
    sender: Optional[str] = Query(None, description="Filtrer par expéditeur (contient)"),
    limit: int = Query(100, ge=1, le=500, description="Nombre max de résultats"),
):
    client = _pcn_client(req)
    try:
        notifs = client.fetch_notifications()

        if type_filter:
            allowed = {t.value for t in type_filter}
            notifs = [n for n in notifs if n.type in allowed]

        if sender:
            s = sender.lower()
            notifs = [n for n in notifs if s in n.sender.lower()]

        notifs = notifs[:limit]
        return {
            "count": len(notifs),
            "notifications": _serialize(notifs),
        }
    finally:
        client.close()


@app.post("/pcn/messages", tags=["PCN"], summary="Messages non lus")
def pcn_messages(
    req: PCNRequest,
    sender: Optional[str] = Query(None, description="Filtrer par expéditeur (contient)"),
    subject: Optional[str] = Query(None, description="Filtrer par sujet (contient)"),
    role: Optional[str] = Query(None, description="Filtrer par rôle (Teacher, Student, Relative…)"),
    has_attachments: Optional[bool] = Query(None, description="Avec pièces jointes uniquement"),
    limit: int = Query(50, ge=1, le=200),
):
    client = _pcn_client(req)
    try:
        raw = client.fetch_messages()
        msgs = client.process(raw)

        if sender:
            s = sender.lower()
            msgs = [m for m in msgs if s in m.sender.lower()]
        if subject:
            s = subject.lower()
            msgs = [m for m in msgs if s in m.subject.lower()]
        if role:
            r = role.lower()
            msgs = [m for m in msgs if r in m.role.lower()]
        if has_attachments is not None:
            msgs = [m for m in msgs if m.has_attachments == has_attachments]

        msgs = msgs[:limit]
        return {
            "count": len(msgs),
            "messages": _serialize(msgs),
        }
    finally:
        client.close()


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  PRONOTE — Endpoints
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


@app.post("/pronote/all", tags=["PRONOTE"], summary="Tout récupérer")
def pronote_all(
    req: PronoteRequest,
    modules: Optional[list[PronoteModules]] = Query(None, description="Modules à récupérer (défaut: tous)"),
):
    client = _pronote_client(req)
    try:
        mods = {m.value for m in modules} if modules else {"grades", "homework", "timetable", "messages", "absences", "info"}

        grades = client.fetch_grades() if "grades" in mods else []
        homework = client.fetch_homework() if "homework" in mods else []
        timetable = client.fetch_timetable() if "timetable" in mods else []
        messages = client.fetch_messages() if "messages" in mods else []
        absences = client.fetch_absences() if "absences" in mods else []
        info = client.fetch_info() if "info" in mods else []

        report = client.build_report(grades, homework, timetable, messages, absences, info)
        return _serialize(report)
    finally:
        client.close()


@app.post("/pronote/grades", tags=["PRONOTE"], summary="Notes")
def pronote_grades(
    req: PronoteRequest,
    subject: Optional[str] = Query(None, description="Filtrer par matière (contient)"),
    min_grade: Optional[float] = Query(None, description="Note minimale"),
    max_grade: Optional[float] = Query(None, description="Note maximale"),
    limit: int = Query(100, ge=1, le=500),
):
    client = _pronote_client(req)
    try:
        grades = client.fetch_grades()

        if subject:
            s = subject.lower()
            grades = [g for g in grades if s in g.subject.lower()]
        if min_grade is not None:
            grades = [g for g in grades if _parse_num(g.grade) >= min_grade]
        if max_grade is not None:
            grades = [g for g in grades if _parse_num(g.grade) <= max_grade]

        grades = grades[:limit]
        return {"count": len(grades), "grades": _serialize(grades)}
    finally:
        client.close()


@app.post("/pronote/homework", tags=["PRONOTE"], summary="Devoirs")
def pronote_homework(
    req: PronoteRequest,
    subject: Optional[str] = Query(None, description="Filtrer par matière"),
    done: Optional[bool] = Query(None, description="Filtrer fait/non fait"),
    limit: int = Query(100, ge=1, le=500),
):
    client = _pronote_client(req)
    try:
        hw = client.fetch_homework()

        if subject:
            s = subject.lower()
            hw = [h for h in hw if s in h.subject.lower()]
        if done is not None:
            hw = [h for h in hw if h.done == done]

        hw = hw[:limit]
        return {"count": len(hw), "homework": _serialize(hw)}
    finally:
        client.close()


@app.post("/pronote/timetable", tags=["PRONOTE"], summary="Emploi du temps (14 jours)")
def pronote_timetable(
    req: PronoteRequest,
    subject: Optional[str] = Query(None, description="Filtrer par matière"),
    teacher: Optional[str] = Query(None, description="Filtrer par professeur"),
    cancelled: Optional[bool] = Query(None, description="Cours annulés uniquement"),
    date: Optional[str] = Query(None, description="Filtrer par date (YYYY-MM-DD)"),
):
    client = _pronote_client(req)
    try:
        lessons = client.fetch_timetable()

        if subject:
            s = subject.lower()
            lessons = [l for l in lessons if s in l.subject.lower()]
        if teacher:
            t = teacher.lower()
            lessons = [l for l in lessons if t in l.teacher.lower()]
        if cancelled is not None:
            lessons = [l for l in lessons if l.is_cancelled == cancelled]
        if date:
            lessons = [l for l in lessons if l.start.startswith(date)]

        return {"count": len(lessons), "timetable": _serialize(lessons)}
    finally:
        client.close()


@app.post("/pronote/messages", tags=["PRONOTE"], summary="Messages")
def pronote_messages(
    req: PronoteRequest,
    sender: Optional[str] = Query(None, description="Filtrer par expéditeur"),
    unread: Optional[bool] = Query(None, description="Non lus uniquement"),
    limit: int = Query(50, ge=1, le=200),
):
    client = _pronote_client(req)
    try:
        msgs = client.fetch_messages()

        if sender:
            s = sender.lower()
            msgs = [m for m in msgs if s in m.sender.lower()]
        if unread is not None:
            msgs = [m for m in msgs if (not m.read) == unread]

        msgs = msgs[:limit]
        return {"count": len(msgs), "messages": _serialize(msgs)}
    finally:
        client.close()


@app.post("/pronote/absences", tags=["PRONOTE"], summary="Absences")
def pronote_absences(
    req: PronoteRequest,
    justified: Optional[bool] = Query(None, description="Justifiée ou non"),
):
    client = _pronote_client(req)
    try:
        absences = client.fetch_absences()

        if justified is not None:
            absences = [a for a in absences if a.justified == justified]

        return {"count": len(absences), "absences": _serialize(absences)}
    finally:
        client.close()


@app.post("/pronote/info", tags=["PRONOTE"], summary="Informations scolaires")
def pronote_info(
    req: PronoteRequest,
    limit: int = Query(50, ge=1, le=200),
):
    client = _pronote_client(req)
    try:
        info = client.fetch_info()
        info = info[:limit]
        return {"count": len(info), "info": _serialize(info)}
    finally:
        client.close(
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#  Utils
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


def _parse_num(val: str) -> float:
    try:
        return float(val.replace(",", "."))
    except (ValueError, AttributeError):
        return 0.0