# ========= Copyright 2025-2026 @ Eigent.ai All Rights Reserved. =========
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ========= Copyright 2025-2026 @ Eigent.ai All Rights Reserved. =========

import logging

from fastapi import APIRouter, Depends, HTTPException, Response
from fastapi_babel import _
from sqlmodel import Session, select

from app.component.auth import Auth, auth_must
from app.component.database import session
from app.model.chat.chat_snpshot import ChatSnapshot, ChatSnapshotIn

logger = logging.getLogger("server_chat_snapshot")

router = APIRouter(prefix="/chat", tags=["Chat Snapshot Management"])


@router.get("/snapshots", name="list chat snapshots", response_model=list[ChatSnapshot])
async def list_chat_snapshots(
    api_task_id: str | None = None,
    camel_task_id: str | None = None,
    browser_url: str | None = None,
    session: Session = Depends(session),
    auth: Auth = Depends(auth_must),
):
    """List chat snapshots with optional filtering."""
    user_id = auth.user.id
    query = select(ChatSnapshot).where(ChatSnapshot.user_id == user_id)
    if api_task_id is not None:
        query = query.where(ChatSnapshot.api_task_id == api_task_id)
    if camel_task_id is not None:
        query = query.where(ChatSnapshot.camel_task_id == camel_task_id)
    if browser_url is not None:
        query = query.where(ChatSnapshot.browser_url == browser_url)

    snapshots = session.exec(query).all()
    logger.debug(
        "Snapshots listed",
        extra={"user_id": user_id, "api_task_id": api_task_id, "camel_task_id": camel_task_id, "count": len(snapshots)},
    )
    return snapshots


@router.get("/snapshots/{snapshot_id}", name="get chat snapshot", response_model=ChatSnapshot)
async def get_chat_snapshot(snapshot_id: int, session: Session = Depends(session), auth: Auth = Depends(auth_must)):
    """Get specific chat snapshot."""
    user_id = auth.user.id
    snapshot = session.get(ChatSnapshot, snapshot_id)

    if not snapshot:
        logger.warning("Snapshot not found", extra={"user_id": user_id, "snapshot_id": snapshot_id})
        raise HTTPException(status_code=404, detail=_("Chat snapshot not found"))

    if snapshot.user_id != user_id:
        logger.warning(
            "Unauthorized snapshot access",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "owner_id": snapshot.user_id},
        )
        raise HTTPException(status_code=403, detail=_("You are not allowed to view this snapshot"))

    logger.debug(
        "Snapshot retrieved",
        extra={"user_id": user_id, "snapshot_id": snapshot_id, "api_task_id": snapshot.api_task_id},
    )
    return snapshot


@router.post("/snapshots", name="create chat snapshot", response_model=ChatSnapshot)
async def create_chat_snapshot(
    snapshot: ChatSnapshotIn, auth: Auth = Depends(auth_must), session: Session = Depends(session)
):
    """Create new chat snapshot from image."""
    user_id = auth.user.id

    try:
        image_path = ChatSnapshotIn.save_image(user_id, snapshot.api_task_id, snapshot.image_base64)
        chat_snapshot = ChatSnapshot(
            user_id=user_id,
            api_task_id=snapshot.api_task_id,
            camel_task_id=snapshot.camel_task_id,
            browser_url=snapshot.browser_url,
            image_path=image_path,
        )
        session.add(chat_snapshot)
        session.commit()
        session.refresh(chat_snapshot)
        logger.info(
            "Snapshot created",
            extra={
                "user_id": user_id,
                "snapshot_id": chat_snapshot.id,
                "api_task_id": snapshot.api_task_id,
                "image_path": image_path,
            },
        )
        return chat_snapshot
    except Exception as e:
        session.rollback()
        logger.error(
            "Snapshot creation failed",
            extra={"user_id": user_id, "api_task_id": snapshot.api_task_id, "error": str(e)},
            exc_info=True,
        )
        raise HTTPException(status_code=500, detail="Internal server error")


@router.put("/snapshots/{snapshot_id}", name="update chat snapshot", response_model=ChatSnapshot)
async def update_chat_snapshot(
    snapshot_id: int,
    snapshot_update: ChatSnapshot,
    session: Session = Depends(session),
    auth: Auth = Depends(auth_must),
):
    """Update chat snapshot."""
    user_id = auth.user.id
    db_snapshot = session.get(ChatSnapshot, snapshot_id)

    if not db_snapshot:
        logger.warning("Snapshot not found for update", extra={"user_id": user_id, "snapshot_id": snapshot_id})
        raise HTTPException(status_code=404, detail=_("Chat snapshot not found"))

    if db_snapshot.user_id != user_id:
        logger.warning(
            "Unauthorized snapshot update",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "owner_id": db_snapshot.user_id},
        )
        raise HTTPException(status_code=403, detail=_("You are not allowed to update this snapshot"))

    try:
        update_data = snapshot_update.dict(exclude_unset=True)
        for key, value in update_data.items():
            setattr(db_snapshot, key, value)
        session.add(db_snapshot)
        session.commit()
        session.refresh(db_snapshot)
        logger.info(
            "Snapshot updated",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "fields_updated": list(update_data.keys())},
        )
        return db_snapshot
    except Exception as e:
        session.rollback()
        logger.error(
            "Snapshot update failed",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "error": str(e)},
            exc_info=True,
        )
        raise HTTPException(status_code=500, detail="Internal server error")


@router.delete("/snapshots/{snapshot_id}", name="delete chat snapshot")
async def delete_chat_snapshot(snapshot_id: int, session: Session = Depends(session), auth: Auth = Depends(auth_must)):
    """Delete chat snapshot."""
    user_id = auth.user.id
    db_snapshot = session.get(ChatSnapshot, snapshot_id)

    if not db_snapshot:
        logger.warning("Snapshot not found for deletion", extra={"user_id": user_id, "snapshot_id": snapshot_id})
        raise HTTPException(status_code=404, detail=_("Chat snapshot not found"))

    if db_snapshot.user_id != user_id:
        logger.warning(
            "Unauthorized snapshot deletion",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "owner_id": db_snapshot.user_id},
        )
        raise HTTPException(status_code=403, detail=_("You are not allowed to delete this snapshot"))

    try:
        session.delete(db_snapshot)
        session.commit()
        logger.info(
            "Snapshot deleted",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "image_path": db_snapshot.image_path},
        )
        return Response(status_code=204)
    except Exception as e:
        session.rollback()
        logger.error(
            "Snapshot deletion failed",
            extra={"user_id": user_id, "snapshot_id": snapshot_id, "error": str(e)},
            exc_info=True,
        )
        raise HTTPException(status_code=500, detail="Internal server error")