"""BAN YARO — Hunde-Profil Routes"""

import os
import uuid
from fastapi import APIRouter, Depends, HTTPException, UploadFile, File
from pydantic import BaseModel
from typing import Optional
from database import db
from auth import get_current_user
from routes.push import send_push_to_user

router    = APIRouter()
MEDIA_DIR = os.getenv("MEDIA_DIR", "/data/media")


class DogCreate(BaseModel):
    name:       str
    rasse:      Optional[str] = None
    geburtstag: Optional[str] = None
    geschlecht: Optional[str] = None
    gewicht_kg: Optional[float] = None
    chip_nr:    Optional[str] = None
    bio:        Optional[str] = None
    is_public:  bool = False


class DogUpdate(BaseModel):
    name:       Optional[str] = None
    rasse:      Optional[str] = None
    geburtstag: Optional[str] = None
    geschlecht: Optional[str] = None
    gewicht_kg: Optional[float] = None
    chip_nr:    Optional[str] = None
    bio:        Optional[str] = None
    is_public:  Optional[bool] = None


@router.get("")
async def list_dogs(user=Depends(get_current_user)):
    with db() as conn:
        own = conn.execute(
            "SELECT *, NULL AS shared_by, NULL AS share_role FROM dogs WHERE user_id=? ORDER BY id",
            (user["id"],)
        ).fetchall()
        shared = conn.execute(
            """SELECT d.*, u.name AS shared_by, ds.role AS share_role
               FROM dog_shares ds
               JOIN dogs d ON d.id = ds.dog_id
               JOIN users u ON u.id = ds.owner_id
               WHERE ds.shared_with_id = ? AND ds.accepted_at IS NOT NULL""",
            (user["id"],)
        ).fetchall()
        guest_rows = conn.execute("""
            SELECT d.*, ss.id AS sub_id, ss.valid_until AS sitting_until,
                   u.name AS owner_name, NULL AS shared_by, NULL AS share_role
            FROM sitting_subscriptions ss
            JOIN dogs  d ON d.id  = ss.dog_id
            JOIN users u ON u.id  = ss.owner_id
            WHERE ss.sitter_id = ?
              AND ss.valid_until >= date('now')
        """, (user["id"],)).fetchall()

    result = []
    for r in own:
        d = dict(r)
        d["is_guest"] = False
        result.append(d)
    for r in shared:
        d = dict(r)
        d["is_guest"] = False
        result.append(d)
    for r in guest_rows:
        d = dict(r)
        d["is_guest"] = True
        result.append(d)
    return result


@router.post("")
async def create_dog(data: DogCreate, user=Depends(get_current_user)):
    with db() as conn:
        conn.execute(
            """INSERT INTO dogs (user_id, name, rasse, geburtstag, geschlecht,
               gewicht_kg, chip_nr, bio, is_public)
               VALUES (?,?,?,?,?,?,?,?,?)""",
            (user["id"], data.name, data.rasse, data.geburtstag,
             data.geschlecht, data.gewicht_kg, data.chip_nr,
             data.bio, int(data.is_public))
        )
        dog = conn.execute(
            "SELECT * FROM dogs WHERE user_id=? ORDER BY id DESC LIMIT 1",
            (user["id"],)
        ).fetchone()
    return dict(dog)


@router.get("/{dog_id}")
async def get_dog(dog_id: int, user=Depends(get_current_user)):
    with db() as conn:
        dog = conn.execute(
            "SELECT * FROM dogs WHERE id=? AND user_id=?", (dog_id, user["id"])
        ).fetchone()
    if not dog:
        raise HTTPException(404, "Hund nicht gefunden.")
    return dict(dog)


@router.patch("/{dog_id}")
async def update_dog(dog_id: int, data: DogUpdate, user=Depends(get_current_user)):
    fields = {k: v for k, v in data.model_dump().items() if v is not None}
    if not fields:
        raise HTTPException(400, "Keine Änderungen angegeben.")

    set_clause = ", ".join(f"{k}=?" for k in fields)
    values     = list(fields.values()) + [dog_id, user["id"]]

    with db() as conn:
        conn.execute(
            f"UPDATE dogs SET {set_clause} WHERE id=? AND user_id=?", values
        )
        dog = conn.execute(
            "SELECT * FROM dogs WHERE id=?", (dog_id,)
        ).fetchone()
    return dict(dog)


@router.delete("/{dog_id}", status_code=204)
async def delete_dog(dog_id: int, user=Depends(get_current_user)):
    with db() as conn:
        conn.execute(
            "DELETE FROM dogs WHERE id=? AND user_id=?", (dog_id, user["id"])
        )


@router.post("/{dog_id}/photo")
async def upload_photo(
    dog_id: int,
    file: UploadFile = File(...),
    user=Depends(get_current_user)
):
    # Hund gehört dem User?
    with db() as conn:
        dog = conn.execute(
            "SELECT id FROM dogs WHERE id=? AND user_id=?", (dog_id, user["id"])
        ).fetchone()
    if not dog:
        raise HTTPException(404, "Hund nicht gefunden.")

    # Datei immer als JPEG speichern (HEIC/PNG/WebP → kompatibel für alle Browser)
    import io
    from PIL import Image
    try:
        import pillow_heif
        pillow_heif.register_heif_opener()
    except ImportError:
        pass

    content = await file.read()
    try:
        from PIL import ImageOps
        img = Image.open(io.BytesIO(content))
        img = ImageOps.exif_transpose(img)  # EXIF-Orientierung anwenden
        img = img.convert("RGB")
        buf = io.BytesIO()
        img.save(buf, format="JPEG", quality=90)
        content = buf.getvalue()
    except Exception:
        pass  # Fallback: Originaldaten speichern

    filename = f"dog_{dog_id}_{uuid.uuid4().hex[:8]}.jpg"
    path     = os.path.join(MEDIA_DIR, "dogs", filename)
    os.makedirs(os.path.dirname(path), exist_ok=True)

    with open(path, "wb") as f:
        f.write(content)

    foto_url = f"/media/dogs/{filename}"
    with db() as conn:
        conn.execute("UPDATE dogs SET foto_url=? WHERE id=?", (foto_url, dog_id))

    return {"foto_url": foto_url}


class PhotoPosition(BaseModel):
    zoom:     float = 1.0
    offset_x: float = 0.0
    offset_y: float = 0.0


@router.patch("/{dog_id}/photo-position")
async def update_photo_position(dog_id: int, pos: PhotoPosition, user=Depends(get_current_user)):
    with db() as conn:
        updated = conn.execute(
            "UPDATE dogs SET foto_zoom=?, foto_offset_x=?, foto_offset_y=? WHERE id=? AND user_id=?",
            (pos.zoom, pos.offset_x, pos.offset_y, dog_id, user["id"])
        ).rowcount
    if not updated:
        raise HTTPException(404, "Hund nicht gefunden.")
    return {"ok": True}


@router.delete("/{dog_id}/photo", status_code=204)
async def delete_photo(dog_id: int, user=Depends(get_current_user)):
    with db() as conn:
        row = conn.execute(
            "SELECT foto_url FROM dogs WHERE id=? AND user_id=?", (dog_id, user["id"])
        ).fetchone()
    if not row:
        raise HTTPException(404, "Hund nicht gefunden.")
    if row["foto_url"]:
        path = os.path.join(MEDIA_DIR, row["foto_url"].lstrip("/media/"))
        if os.path.exists(path):
            os.remove(path)
    with db() as conn:
        conn.execute(
            "UPDATE dogs SET foto_url=NULL, foto_zoom=1.0, foto_offset_x=0.0, foto_offset_y=0.0 WHERE id=?",
            (dog_id,)
        )


# ------------------------------------------------------------------
# Fähigkeiten / Kommandos (für Profil + öffentliche Seite)
# ------------------------------------------------------------------

def _parse_exercise_name(exercise_id: str) -> str:
    """grundkommandos_Hier__Komm → 'Hier / Komm'"""
    parts = exercise_id.split("_", 1)
    if len(parts) < 2:
        return exercise_id
    return parts[1].replace("__", " / ").replace("_", " ")


def _load_skills(conn, dog_id: int, user_id: int) -> list:
    """Gibt Übungen mit Status 'sitzt' oder 'meistens' zurück, die mit diesem Hund trainiert wurden."""
    rows = conn.execute(
        """
        SELECT ep.exercise_id, ep.status,
               (SELECT ts.exercise_name FROM training_sessions ts
                WHERE ts.user_id = ep.user_id AND ts.dog_id = ?
                  AND ts.exercise_id = ep.exercise_id
                ORDER BY ts.datum DESC, ts.created_at DESC LIMIT 1) AS exercise_name
        FROM exercise_progress ep
        WHERE ep.user_id = ?
          AND ep.status IN ('sitzt', 'meistens')
          AND EXISTS (SELECT 1 FROM training_sessions ts2
                      WHERE ts2.user_id = ep.user_id AND ts2.dog_id = ?
                        AND ts2.exercise_id = ep.exercise_id)
        ORDER BY ep.status DESC, ep.exercise_id
        """,
        (dog_id, user_id, dog_id)
    ).fetchall()

    return [
        {
            "exercise_id":   r["exercise_id"],
            "exercise_name": r["exercise_name"] or _parse_exercise_name(r["exercise_id"]),
            "status":        r["status"],
            "tab":           r["exercise_id"].split("_")[0],
        }
        for r in rows
    ]


@router.get("/{dog_id}/skills")
async def get_dog_skills(dog_id: int, user=Depends(get_current_user)):
    uid = user["id"]
    with db() as conn:
        dog = conn.execute(
            "SELECT id, user_id FROM dogs WHERE id=? AND (user_id=? OR id IN (SELECT dog_id FROM sitting_access WHERE friend_id=? AND expires_at > datetime('now')))",
            (dog_id, uid, uid)
        ).fetchone()
        if not dog:
            raise HTTPException(404, "Hund nicht gefunden.")
        return _load_skills(conn, dog_id, dog["user_id"])


# Öffentliches Profil (für NFC-Tag, kein Login nötig)
@router.get("/public/{dog_id}")
async def public_dog_profile(dog_id: int):
    with db() as conn:
        dog = conn.execute(
            """SELECT d.id, d.name, d.rasse, d.geburtstag, d.foto_url, d.bio,
                      d.user_id, u.name as besitzer_name
               FROM dogs d JOIN users u ON d.user_id=u.id
               WHERE d.id=? AND d.is_public=1""",
            (dog_id,)
        ).fetchone()
        if not dog:
            raise HTTPException(404, "Profil nicht gefunden oder nicht öffentlich.")
        skills = _load_skills(conn, dog_id, dog["user_id"])
    result = dict(dog)
    result.pop("user_id", None)
    result["skills"] = skills
    return result


class FoundReport(BaseModel):
    message:  Optional[str] = None
    kontakt:  Optional[str] = None


# Gefunden-Meldung (kein Login nötig)
@router.post("/public/{dog_id}/found")
async def report_found(dog_id: int, data: FoundReport = FoundReport()):
    with db() as conn:
        row = conn.execute(
            """SELECT d.id, d.name, d.user_id
               FROM dogs d
               WHERE d.id=? AND d.is_public=1""",
            (dog_id,)
        ).fetchone()
    if not row:
        raise HTTPException(404, "Profil nicht gefunden oder nicht öffentlich.")

    dog_name = row["name"]
    user_id  = row["user_id"]

    body = data.message.strip() if data.message and data.message.strip() \
        else "Jemand hat deinen Hund gefunden. Öffne die App für Details."

    if data.kontakt and data.kontakt.strip():
        body += f" Kontakt: {data.kontakt.strip()}"

    send_push_to_user(user_id, {
        "title": f"🐾 {dog_name} wurde gefunden!",
        "body":  body,
        "data":  {"page": "diary", "found": True},
        "tag":   f"found-{dog_id}",
    })

    return {"ok": True}