import uuid

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.deps import get_current_user, get_db_session, require_study_member, require_study_roles
from app.crud import audit as audit_crud
from app.crud import knowledge_note as note_crud
from app.crud import study as study_crud
from app.schemas.knowledge_note import KnowledgeNoteCreate, KnowledgeNoteRead, KnowledgeNoteUpdate

router = APIRouter()


async def _ensure_study_exists(db: AsyncSession, study_id: uuid.UUID):
    study = await study_crud.get(db, study_id)
    if not study:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="项目不存在")
    return study


@router.post(
    "/notes",
    response_model=KnowledgeNoteRead,
    status_code=status.HTTP_201_CREATED,
    dependencies=[Depends(require_study_roles(["PM", "CRA"]))],
)
async def create_note(
    study_id: uuid.UUID,
    note_in: KnowledgeNoteCreate,
    db: AsyncSession = Depends(get_db_session),
    current_user=Depends(get_current_user),
) -> KnowledgeNoteRead:
    await _ensure_study_exists(db, study_id)
    note = await note_crud.create_note(db, study_id, note_in, created_by=current_user.id)
    await audit_crud.log_action(
        db,
        study_id=study_id,
        entity_type="knowledge_note",
        entity_id=note.id,
        action="CREATE_KNOWLEDGE_NOTE",
        detail=f"注意事项 {note.title} 已创建",
        operator_id=current_user.id,
        operator_role=current_user.role,
    )
    return KnowledgeNoteRead.model_validate(note)


@router.get(
    "/notes",
    response_model=list[KnowledgeNoteRead],
    dependencies=[Depends(require_study_member())],
)
async def list_notes(
    study_id: uuid.UUID,
    site_name: str | None = None,
    keyword: str | None = None,
    skip: int = 0,
    limit: int = 100,
    db: AsyncSession = Depends(get_db_session),
) -> list[KnowledgeNoteRead]:
    await _ensure_study_exists(db, study_id)
    items = await note_crud.list_notes(db, study_id, site_name=site_name, keyword=keyword, skip=skip, limit=limit)
    return [KnowledgeNoteRead.model_validate(item) for item in items]


@router.get(
    "/notes/{note_id}",
    response_model=KnowledgeNoteRead,
    dependencies=[Depends(require_study_member())],
)
async def get_note(
    study_id: uuid.UUID,
    note_id: uuid.UUID,
    db: AsyncSession = Depends(get_db_session),
) -> KnowledgeNoteRead:
    await _ensure_study_exists(db, study_id)
    note = await note_crud.get_note(db, note_id)
    if not note or note.study_id != study_id:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="注意事项不存在")
    return KnowledgeNoteRead.model_validate(note)


@router.patch(
    "/notes/{note_id}",
    response_model=KnowledgeNoteRead,
    dependencies=[Depends(require_study_roles(["PM", "CRA"]))],
)
async def update_note(
    study_id: uuid.UUID,
    note_id: uuid.UUID,
    note_in: KnowledgeNoteUpdate,
    db: AsyncSession = Depends(get_db_session),
    current_user=Depends(get_current_user),
) -> KnowledgeNoteRead:
    await _ensure_study_exists(db, study_id)
    note = await note_crud.get_note(db, note_id)
    if not note or note.study_id != study_id:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="注意事项不存在")
    note = await note_crud.update_note(db, note, note_in)
    await audit_crud.log_action(
        db,
        study_id=study_id,
        entity_type="knowledge_note",
        entity_id=note_id,
        action="UPDATE_KNOWLEDGE_NOTE",
        detail=f"注意事项 {note_id} 已更新",
        operator_id=current_user.id,
        operator_role=current_user.role,
    )
    return KnowledgeNoteRead.model_validate(note)


@router.delete(
    "/notes/{note_id}",
    status_code=status.HTTP_204_NO_CONTENT,
    dependencies=[Depends(require_study_roles(["PM", "CRA"]))],
)
async def delete_note(
    study_id: uuid.UUID,
    note_id: uuid.UUID,
    db: AsyncSession = Depends(get_db_session),
    current_user=Depends(get_current_user),
) -> None:
    await _ensure_study_exists(db, study_id)
    note = await note_crud.get_note(db, note_id)
    if not note or note.study_id != study_id:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="注意事项不存在")
    await note_crud.delete_note(db, note)
    await audit_crud.log_action(
        db,
        study_id=study_id,
        entity_type="knowledge_note",
        entity_id=note_id,
        action="DELETE_KNOWLEDGE_NOTE",
        detail=f"注意事项 {note_id} 已删除",
        operator_id=current_user.id,
        operator_role=current_user.role,
    )