import uuid
from io import BytesIO
from PIL import Image
import numpy as np
from qdrant_client.http.models import Filter, FieldCondition, MatchValue, ScrollRequest
from qdrant_client.models import SearchParams

from .clients import get_s3, get_qdrant, get_neo4j, get_s3_session
from .config import S3_BUCKET, QDRANT_COLLECTION, AWS_REGION
from .processing import embed_image_dino_large
from .image_processing import encode_image_to_base64

def upload_image_to_s3(image_np: np.ndarray, key: str) -> str:
    pil = Image.fromarray(image_np)
    buf = BytesIO()
    pil.save(buf, format="PNG")
    buf.seek(0)
    get_s3().upload_fileobj(buf, S3_BUCKET, key, ExtraArgs={"ContentType":"image/png"})

    # 3) build URL
    return f"https://{S3_BUCKET}.s3.{AWS_REGION}.amazonaws.com/{key}"

def download_image_from_s3(key: str) -> np.ndarray:
    buf = BytesIO()
    get_s3().download_fileobj(S3_BUCKET, key, buf)
    buf.seek(0)
    pil = Image.open(buf).convert("RGB")
    return np.array(pil)

from qdrant_client.http.models import PointStruct
import uuid
import numpy as np

def add_vector_to_qdrant(vectors: dict, payload: dict, view_id: str = None):
    """
    Add one or more named vectors to Qdrant.
    
    :param vectors: Dict of named vectors, e.g., {"text_embedding": np.ndarray, "image_embedding": np.ndarray}
    :param payload: Metadata dictionary
    :param view_id: Optional specific point ID
    :return: view_id used for storage
    """
    if view_id is None:
        view_id = str(uuid.uuid4())
    
    # Ensure vectors are converted to lists if they are numpy arrays
    vector_payload = {name: vec.tolist() if isinstance(vec, np.ndarray) else vec for name, vec in vectors.items()}

    pt = PointStruct(id=view_id, vector=vector_payload, payload=payload)
    get_qdrant().upsert(collection_name=QDRANT_COLLECTION, points=[pt])

    return view_id


def query_vector_db_by_mask(query_image: np.ndarray, k:int=5):
    embeddings = embed_image_dino_large(query_image)
    vec = ("dinov2_embedding", embeddings.tolist()) 
    client = get_qdrant()
    results = client.search(QDRANT_COLLECTION, query_vector=vec, limit=k)
    return results

def query_vector_db_by_image_embedding(embeddings: np.ndarray, k:int=5, house_id: str = None):
    client = get_qdrant()
    if house_id:
        # Filter by house_id if provided
        filter_condition = Filter(
            must=[
                FieldCondition(key="house_id", match=MatchValue(value=house_id))
            ]
        )
    else:
        filter_condition = None

    # Search using the provided embeddings
    results = client.search(QDRANT_COLLECTION, 
                            query_vector=("dinov2_embedding", embeddings.tolist()), 
                            limit=k,
                            query_filter=filter_condition,
                            search_params=SearchParams(exact=True))
    return results

def query_vector_db_by_text_embedding(embeddings: np.ndarray, k:int=5, house_id: str = None):
    client = get_qdrant()
    if house_id:
        # Filter by house_id if provided
        filter_condition = Filter(
            must=[
                FieldCondition(key="house_id", match=MatchValue(value=house_id))
            ]
        )
    else:
        filter_condition = None
        
    results = client.search(QDRANT_COLLECTION, 
                        query_vector=("clip_text_embedding", embeddings.tolist()), 
                        limit=k,
                        query_filter=filter_condition)
    return results


def add_object_to_neo4j(object_id, house_id, description, qdrant_object_id) -> None:
    with get_neo4j().session() as s:
        s.run(
            "MERGE (h:House {house_id:$house_id}) "
            "MERGE (o:Object {object_id:$object_id}) "
            "SET o.description=$desc, o.qdrant_object_id=$qdrant_object_id "
            "MERGE (h)-[:CONTAINS]->(o)",
            {"house_id":house_id, "object_id":object_id,
             "desc":description, "qdrant_object_id":qdrant_object_id}
        )

def get_object_info_from_graph(house_id: str, object_id: str) -> str:
    with get_neo4j().session() as s:
        result = s.run("""
            MATCH (h:House {house_id: $household_id})-[:CONTAINS]->(o:Object {object_id: $object_id})
            RETURN o.description AS description
        """, {"household_id": house_id, "object_id": object_id})

        record = result.single()
        if record:
            return record.get("description")
        return None


def set_object_primary_location_hierarchy(
    object_id: str,
    house_id: str,
    location_hierarchy: list  # Example: ["Kitchen", "Left Upper Cabinet", "Middle Shelf"]
) -> None:
    with get_neo4j().session() as s:
        # Ensure the house node exists
        s.run(
            "MERGE (h:House {house_id: $house_id})",
            {"house_id": house_id}
        )

        # Build nested location hierarchy
        parent_label = "House"
        parent_key = "house_id"
        parent_value = house_id

        for idx, location_name in enumerate(location_hierarchy):
            s.run(
                f"""
                MATCH (parent:{parent_label} {{{parent_key}: $parent_value}})
                MERGE (loc:Location {{name: $location_name}})
                MERGE (parent)-[:CONTAINS]->(loc)
                """,
                {"parent_value": parent_value, "location_name": location_name}
            )
            parent_label = "Location"
            parent_key = "name"
            parent_value = location_name

        if location_hierarchy:
            final_location_name = location_hierarchy[-1]

            # Remove existing PRIMARY_LOCATION edges
            s.run(
                """
                MATCH (o:Object {object_id: $object_id})-[r:PRIMARY_LOCATION]->(:Location)
                DELETE r
                """,
                {"object_id": object_id}
            )

            # Add new PRIMARY_LOCATION edge
            s.run(
                """
                MATCH (o:Object {object_id: $object_id})
                MATCH (loc:Location {name: $location_name})
                MERGE (o)-[:PRIMARY_LOCATION]->(loc)
                """,
                {"object_id": object_id, "location_name": final_location_name}
            )

def get_object_location_chain(house_id: str, object_id: str, include_images: bool = False):
    with get_neo4j().session() as session:
        # Find PRIMARY_LOCATION
        result = session.run(
            """
            MATCH (h:House {house_id: $house_id})
                  -[:CONTAINS*]->(loc:Location)<-[:PRIMARY_LOCATION]-(o:Object {object_id: $object_id})
            RETURN loc
            """,
            {"house_id": house_id, "object_id": object_id}
        )

        record = result.single()
        if not record:
            return []

        # Build location chain
        locations = []
        current_name = record["loc"]["name"]

        while current_name:
            loc_record = session.run(
                """
                MATCH (h:House {house_id: $house_id})
                      -[:CONTAINS*]->(loc:Location {name: $name})
                RETURN loc
                """,
                {"house_id": house_id, "name": current_name}
            ).single()

            if not loc_record:
                break

            loc_node = loc_record["loc"]
            loc_info = {
                "name": loc_node["name"],
                "image_uri": loc_node.get("image_uri"),
                "location_x": loc_node.get("location_x"),
                "location_y": loc_node.get("location_y"),
                "location_z": loc_node.get("location_z"),
                "shape": loc_node.get("shape"),
                "radius": loc_node.get("radius"),
                "height": loc_node.get("height"),
                "width": loc_node.get("width"),
                "depth": loc_node.get("depth"),
            }
            # Optionally include actual image data
            if include_images and loc_node.get("image_uri"):
                try:
                    img = download_image_from_s3(loc_node["image_uri"])
                    loc_info["image_base64"] = encode_image_to_base64(img)
                except Exception as e:
                    loc_info["image"] = None  # Optionally log or raise
                    print(f"Warning: Failed to load image from S3 for {loc_node['name']}: {e}")

            
            locations.insert(0, loc_info)

            parent_record = session.run(
                """
                MATCH (parent:Location)-[:CONTAINS]->(loc:Location {name: $name})
                RETURN parent.name AS parent_name
                """,
                {"name": current_name}
            ).single()

            current_name = parent_record["parent_name"] if parent_record else None

        return locations

def get_all_locations_for_house(house_id: str, include_images: bool = False):
    with get_neo4j().session() as session:
        result = session.run(
            """
            MATCH (h:House {house_id: $house_id})-[:CONTAINS*]->(loc:Location)
            OPTIONAL MATCH (parent:Location)-[:CONTAINS]->(loc)
            RETURN loc, parent.name AS parent_name
            """,
            {"house_id": house_id}
        )

        locations = []
        for record in result:
            loc_node = record["loc"]
            parent_name = record["parent_name"]

            loc_info = {
                "name": loc_node["name"],
                "parents": [parent_name] if parent_name else [],
                "image_uri": loc_node.get("image_uri"),
                "location_x": loc_node.get("location_x"),
                "location_y": loc_node.get("location_y"),
                "location_z": loc_node.get("location_z")
            }

            if include_images and loc_node.get("image_uri"):
                try:
                    img = download_image_from_s3(loc_node["image_uri"])
                    loc_info["image_base64"] = encode_image_to_base64(img)
                except Exception as e:
                    print(f"Warning: Failed to load image for {loc_node['name']}: {e}")
                    loc_info["image_base64"] = None

            locations.append(loc_info)

        return locations


def get_object_owners(house_id: str, object_id: str):
    with get_neo4j().session() as session:
        result = session.run(
            """
            MATCH (h:House {house_id: $house_id})
                -[:CONTAINS*]->(o:Object {object_id: $object_id})
                -[:OWNED_BY]->(p:Person)
            RETURN p
            """,
            {"house_id": house_id, "object_id": object_id}
        )

        owners = []
        for record in result:
            p = record["p"]
            owners.append({
                "person_id": p.get("person_id"),
                "name": p.get("name"),
                "type": p.get("type", "person"),  # Defaults to "person" if missing
                "image_uri": p.get("image_uri")
            })
        return owners

def add_owner_by_person_id(house_id: str, object_id: str, person_id: str):
    with get_neo4j().session() as session:
        result = session.run(
            """
            MATCH (h:House {house_id: $house_id})-[:CONTAINS*]->(o:Object {object_id: $object_id}),
                  (p:Person {person_id: $person_id})
            MERGE (o)-[:OWNED_BY]->(p)
            RETURN p
            """,
            {"house_id": house_id, "object_id": object_id, "person_id": person_id}
        )
        record = result.single()
        return record["p"] if record else None


def add_owner_by_person_name(house_id: str, object_id: str, name: str, type: str = "person"):
    person_id = str(uuid.uuid4())
    with get_neo4j().session() as session:
        result = session.run(
            """
            MATCH (h:House {house_id: $house_id})-[:CONTAINS*]->(o:Object {object_id: $object_id})
            CREATE (p:Person {person_id: $person_id, name: $name, type: $type})
            MERGE (o)-[:OWNED_BY]->(p)
            RETURN p
            """,
            {"house_id": house_id, "object_id": object_id, "person_id": person_id, "name": name, "type": type}
        )
        record = result.single()
        return record["p"] if record else None

def get_object_details(house_id: str, object_id: str):
    """
    Collects and returns:
      - Description from Neo4j
      - All image views from Qdrant and S3
      - All text descriptions from Qdrant
      - Location hierarchy from Neo4j with S3-loaded images
      - Owners from Neo4j
    """
    # Fetch description from Neo4j
    description = get_object_info_from_graph(house_id, object_id)

    # Fetch all vector points (images and texts) from Qdrant
    client = get_qdrant()
    all_points = []
    offset = None

    while True:
        points, offset = client.scroll(
            collection_name=QDRANT_COLLECTION,
            scroll_filter=Filter(
                must=[
                    FieldCondition(key="object_id", match=MatchValue(value=object_id))
                ]
            ),
            limit=100,
            offset=offset
        )
        all_points.extend(points)
        if offset is None:
            break

    # Separate images and texts
    images = []
    texts = []
    for point in all_points:
        payload = point.payload
        if payload.get("type") == "image" and payload.get("image_url"):
            try:
                s3_key = payload["image_url"].replace(f"https://{S3_BUCKET}.s3.{AWS_REGION}.amazonaws.com/", "")
                img_np = download_image_from_s3(s3_key)
                images.append({"image": img_np, "url": payload["image_url"]})
            except Exception as e:
                print(f"Failed to load image: {e}")
        elif payload.get("type") == "text" and payload.get("description"):
            texts.append(payload["description"])

    # Fetch location hierarchy WITHOUT embedded images
    locations = get_object_location_chain(house_id, object_id, include_images=False)

    # Load images for each location if image_uri exists
    location_images = []
    for loc in locations:
        uri = loc.get("image_uri")
        if uri:
            try:
                s3_key = uri.replace(f"https://{S3_BUCKET}.s3.{AWS_REGION}.amazonaws.com/", "")
                img_np = download_image_from_s3(s3_key)
                location_images.append(img_np)
            except Exception as e:
                print(f"Failed to load location image {uri}: {e}")

    # Fetch owners
    owners = get_object_owners(house_id, object_id)

    return {
        "description": description,
        "images": images,
        "texts": texts,
        "locations": locations,
        "location_images": location_images,
        "owners": owners
    }