import datetime
from pathlib import Path

import settings
from troggle.core.models.survex import SingleScan
from troggle.core.models.troggle import DataIssue
from troggle.core.models.wallets import Wallet

"""Searches through all the survey scans directories (wallets) in expofiles, looking for images to be referenced. Loads all the wallets .
"""

contentsjson = "contents.json"

git = settings.GIT

# to do: Actually read all the JSON files and set the survex file field appropriately!


def set_walletyear(wallet):
    _ = wallet.year()  # don't need return value. Just calling this saves it as w.walletyear

def set_JSONwalletdate(wallet):
    """At this point in the import process, the survex files have not been imported so
    we cannot get dates from them. There are about 40 JSON files (in 2022) which we read here."""
    _ = wallet.date()  # don't need return value. Sets .walletdate as side effect

def load_all_scans():
    """This iterates through the scans directories (either here or on the remote server)
    and builds up the models we can access later.

    It does NOT read or validate anything in the JSON data attached to each wallet. Those checks
    are done at runtime, when a wallet is accessed, not at import time.
    
    Loads people as a simple string of fullnames. We should replace this with a list of Person slugs.

    """
    print(" - Loading Survey Scans")

    SingleScan.objects.all().delete()
    Wallet.objects.all().delete()
    print("  - deleting all Wallet and SingleScan objects, and resize error messages")
    DataIssue.objects.filter(parser="scans").delete()
    DataIssue.objects.filter(parser="wallets").delete()
    DataIssue.objects.filter(parser="mogrify").delete()

    # These are valid old file types to be visible, they are not necessarily allowed to be uploaded to a new wallet.
    valids = [
        ".top",
        ".txt",
        ".tif",
        ".png",
        ".jpg",
        ".jpeg",
        ".pdf",
        ".svg",
        ".gif",
        ".xvi",
        ".json",
        ".autosave",
        ".sxd",
        ".svx",
        ".th",
        ".th2",
        ".tdr",
        ".sql",
        ".zip",
        ".dxf",
        ".3d",
        ".ods",
        ".csv",
        ".xcf",
        ".xml",
    ]
    validnames = ["thconfig", "manifest"]

    # iterate into the surveyscans directory
    # Not all folders with files in them are wallets.
    # they are if they   are /2010/2010#33
    #     or /1996-1999NotKHbook/
    #     but not if they are /2010/2010#33/therion/  : the wallet is /2010#33/ not /therion/
    print("   ", end="")
    scans_path = Path(settings.SCANS_ROOT)
    seen = []
    c = 0
    wallets = {}
    for p in scans_path.rglob("*"):
        if p.is_file():
            if p.suffix.lower() not in valids and p.name.lower() not in validnames:
                # print(f"'{p}'", end='\n')
                pass
            elif p.parent == scans_path:  # skip files directly in /surveyscans/
                pass
            else:

                c += 1
                if c % 15 == 0:
                    print(".", end="")
                if c % 750 == 0:
                    print("\n   ", end="")

                if p.parent.parent.parent.parent == scans_path:
                    # print(f"too deep {p}", end='\n')
                    fpath = p.parent.parent
                    walletname = p.parent.parent.name  # wallet is one level higher
                else:
                    fpath = p.parent
                    walletname = p.parent.name

                if walletname in wallets:
                    wallet = wallets[walletname]
                else:
                    print("", flush=True, end="")
                    # Create the wallet object. But we don't have a date for it yet.
                    wallet = Wallet(fpath=fpath, walletname=walletname)
                    set_walletyear(wallet)
                    wallet.save()
                    wallets[walletname] = wallet

                singlescan = SingleScan(ffile=fpath, name=p.name, wallet=wallet)
                singlescan.save()

                # only printing progress:
                tag = p.parent
                if len(walletname) > 4:
                    if walletname[4] == "#":
                        tag = p.parent.parent

                if tag not in seen:
                    print(f" {tag.name} ", end="")
                    if len(str(tag.name)) > 17:
                        print("\n   ", end="")
                    seen.append(tag)

    print(f"\n  - found and loaded {c:,} acceptable scan files in {len(wallets):,} wallets")

    # but we also need to check if JSON exists, even if there are no uploaded scan files.
    # Here we know there is a rigid folder structure, so no need to look for sub folders
    print("\n  - Checking for wallets where JSON exists, but there may be no uploaded scan files:")
    print("   ", end="")
    wjson = 0
    contents_path = Path(settings.DRAWINGS_DATA, "walletjson")
    for yeardir in contents_path.iterdir():
        if yeardir.is_dir():
            for walletpath in yeardir.iterdir():
                if Path(walletpath, contentsjson).is_file():
                    walletname = walletpath.name

                    if walletname not in wallets:
                        wjson += 1
                        if wjson % 10 == 0:
                            print("\n   ", end="")

                        print(f"{walletname} ", end="")
                        fpath = Path(settings.SCANS_ROOT, str(yeardir.stem), walletname)
                        # The wallets found from JSON should all have dates already
                        wallet, created = Wallet.objects.update_or_create(walletname=walletname, fpath=fpath)
                        wallets[walletname] = wallet
                        # Now also load the json 
                        # BUT can't check linked survex blocks as they haven't been imported yet
                        set_JSONwalletdate(wallet)
                        set_walletyear(wallet)
                        if not created:
                            print(
                                f"\n  - {walletname} was not created, but was not in directory walk of /surveyscans/. Who created it?"
                            )
                            wallet.save()
    print(f"\n  - found another {wjson:,} JSON files, making a total of {len(wallets):,} wallets")
    
    # Only the 1999 wallets have filenames which mean that the walletyear will be unset:
    wallets = Wallet.objects.filter(walletyear=None)
    for w in wallets:
        w.walletyear = datetime.date(1999, 1, 1)