import base64
import io
import os.path
import pathlib
import zipfile
from typing import List, Optional
from fastapi import APIRouter, HTTPException, Query
from ..schemas import *
from ..utils import crc32, read_all_maps, map_file_to_dict
from ..config import config
import re


router = APIRouter()

MAX_UPLOAD_SIZE = config["max_file_size"]
MAPS = read_all_maps()


@router.get("/maps", tags=["maps"], response_model=List[MapOut])
async def get_all_maps():
    return [MapOut(**d) for d in MAPS]


@router.get("/map", tags=["maps"], response_model=MapOut)
async def get_map_by_crc(human_crc: Optional[str] = Query(None, min_length=8, max_length=8),
                         crc: Optional[int] = Query(None)):

    if not human_crc and not crc:
        raise HTTPException(status_code=400, detail="Please use crc or human_crc but not both")
    if human_crc and crc:
        raise HTTPException(status_code=400, detail="Please use crc or human_crc but not both")

    if human_crc:
        maps = [gmap for gmap in MAPS if gmap["crc_human"] == human_crc.upper()]
    else:
        maps = [gmap for gmap in MAPS if gmap["crc"] == crc]
    if not maps:
        raise HTTPException(status_code=404, detail="Map not found")
    return MapOut(**maps[0])


@router.post("/maps", tags=["maps"], response_model=MapOut)
async def upload_map(map_in: MapIn):
    allowed_name = re.compile("[a-zA-Z-.\d()[] ]+.gck")
    filename = map_in.name
    if not allowed_name.fullmatch(filename):
        raise HTTPException(status_code=400, detail="Invalid filename")

    map_bytes = base64.b64decode(map_in.b64_data.encode("utf8"))
    if len(map_bytes) > MAX_UPLOAD_SIZE:
        raise HTTPException(status_code=400, detail="File too big")

    map_io = io.BytesIO(map_bytes)
    try:
        zipfile.ZipFile(map_io)
    except zipfile.BadZipfile:
        raise HTTPException(status_code=400, detail="File is not a valid map")

    crc = crc32(map_bytes)
    existing_map = [gmap for gmap in MAPS if gmap["crc"] == crc]
    if existing_map:
        return MapOut(**existing_map[0])
    else:
        uploaded_filename = f"{filename}.gck"
        i = 0
        while os.path.exists(f"{config['upload_path']}{uploaded_filename}"):
            uploaded_filename = f"{filename}-{i}.gck"
            i += 1
        with open(f"{config['upload_path']}{uploaded_filename}", "wb") as fp:
            fp.write(map_bytes)
        gmap = map_file_to_dict(pathlib.Path(f"{config['upload_path']}{uploaded_filename}"))
        MAPS.append(gmap)
        return MapOut(**gmap)