from fastapi import APIRouter, File, UploadFile, Form, HTTPException, Depends
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from pydantic import BaseModel, EmailStr
from typing import Optional
import io
import os

from database.database import get_db, Profile as DBProfile
from database.minio_processor import MinIOProcessor
from openrouter_client import openrouter_client

minio_client = MinIOProcessor(
    endpoint=os.getenv("MINIO_ENDPOINT", "localhost:9000"),
    access_key=os.getenv("MINIO_ACCESS_KEY", "minioadmin"),
    secret_key=os.getenv("MINIO_SECRET_KEY", "minioadmin"),
    secure=False
)
MINIO_BUCKET = os.getenv("MINIO_BUCKET", "resumes")

router = APIRouter(prefix="/api/profile", tags=["profile"])


class ProfileResponse(BaseModel):
    id: int
    name: str
    email: str
    position: str
    competencies: Optional[str]
    experience: Optional[str]
    skills: Optional[str]
    country: Optional[str]
    languages: Optional[str]
    employment_format: Optional[str]
    rate: Optional[str]
    relocation: Optional[str]
    cv_url: Optional[str]

    class Config:
        from_attributes = True


@router.post("/upload-cv", response_model=ProfileResponse)
async def upload_and_parse_cv(
    cv: UploadFile = File(...),
    db: AsyncSession = Depends(get_db)
):
    if cv.content_type != "application/pdf":
        raise HTTPException(status_code=400, detail="CV must be a PDF file")

    pdf_content = await cv.read()

    try:
        parsed_data = await openrouter_client.parse_cv_from_pdf(pdf_content)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Error parsing CV with AI: {str(e)}")

    if not parsed_data.get("email"):
        raise HTTPException(status_code=400, detail="Could not extract email from CV")

    email = parsed_data["email"]

    result = await db.execute(select(DBProfile).where(DBProfile.email == email))
    existing_profile = result.scalar_one_or_none()

    object_name = f"cv/{email.replace('@', '_')}_{cv.filename}"
    try:
        await cv.seek(0)
        cv_file_data = await cv.read()
        await cv.seek(0)

        minio_client.put_object(
            bucket_name=MINIO_BUCKET,
            object_name=object_name,
            data=io.BytesIO(cv_file_data),
            length=len(cv_file_data),
            content_type="application/pdf"
        )
        cv_url = f"minio://{MINIO_BUCKET}/{object_name}"
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to upload CV to storage: {str(e)}")

    if existing_profile:
        existing_profile.name = parsed_data.get("name") or existing_profile.name
        existing_profile.position = parsed_data.get("position") or existing_profile.position
        existing_profile.competencies = parsed_data.get("competencies")
        existing_profile.experience = parsed_data.get("experience")
        existing_profile.skills = parsed_data.get("skills")
        existing_profile.country = parsed_data.get("country")
        existing_profile.languages = parsed_data.get("languages")
        existing_profile.employment_format = parsed_data.get("employment_format")
        existing_profile.rate = parsed_data.get("rate")
        existing_profile.relocation = parsed_data.get("relocation")
        existing_profile.cv_url = cv_url
        profile = existing_profile
    else:
        profile = DBProfile(
            email=email,
            name=parsed_data.get("name", "Unknown"),
            position=parsed_data.get("position", "Not specified"),
            competencies=parsed_data.get("competencies"),
            experience=parsed_data.get("experience"),
            skills=parsed_data.get("skills"),
            country=parsed_data.get("country"),
            languages=parsed_data.get("languages"),
            employment_format=parsed_data.get("employment_format"),
            rate=parsed_data.get("rate"),
            relocation=parsed_data.get("relocation"),
            cv_url=cv_url
        )
        db.add(profile)

    await db.commit()
    await db.refresh(profile)

    return profile


@router.post("/save", response_model=ProfileResponse)
async def save_profile_manual(
    name: str = Form(...),
    email: EmailStr = Form(...),
    position: str = Form(...),
    competencies: Optional[str] = Form(None),
    experience: Optional[str] = Form(None),
    skills: Optional[str] = Form(None),
    country: Optional[str] = Form(None),
    languages: Optional[str] = Form(None),
    employment_format: Optional[str] = Form(None),
    rate: Optional[str] = Form(None),
    relocation: Optional[str] = Form(None),
    db: AsyncSession = Depends(get_db)
):
    result = await db.execute(select(DBProfile).where(DBProfile.email == email))
    existing_profile = result.scalar_one_or_none()

    if existing_profile:
        existing_profile.name = name
        existing_profile.position = position
        existing_profile.competencies = competencies
        existing_profile.experience = experience
        existing_profile.skills = skills
        existing_profile.country = country
        existing_profile.languages = languages
        existing_profile.employment_format = employment_format
        existing_profile.rate = rate
        existing_profile.relocation = relocation
        profile = existing_profile
    else:
        profile = DBProfile(
            name=name,
            email=email,
            position=position,
            competencies=competencies,
            experience=experience,
            skills=skills,
            country=country,
            languages=languages,
            employment_format=employment_format,
            rate=rate,
            relocation=relocation
        )
        db.add(profile)

    await db.commit()
    await db.refresh(profile)

    return profile


@router.get("/{email}", response_model=ProfileResponse)
async def get_profile(email: str, db: AsyncSession = Depends(get_db)):
    result = await db.execute(select(DBProfile).where(DBProfile.email == email))
    profile = result.scalar_one_or_none()

    if not profile:
        raise HTTPException(status_code=404, detail="Profile not found")

    return profile