# Copyright: Ankitects Pty Ltd and contributors
# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html

from __future__ import annotations

from itertools import chain

import aqt.main
from anki.collection import Collection, ImportLogWithChanges, Progress
from anki.errors import Interrupted
from aqt.operations import CollectionOp, QueryOp
from aqt.progress import ProgressUpdate
from aqt.qt import *
from aqt.utils import askUser, getFile, showInfo, showText, showWarning, tooltip, tr


def import_file(mw: aqt.main.AnkiQt) -> None:
    if not (path := get_file_path(mw)):
        return

    filename = os.path.basename(path).lower()
    if filename.endswith(".anki"):
        showInfo(tr.importing_anki_files_are_from_a_very())
    elif filename.endswith(".anki2"):
        showInfo(tr.importing_anki2_files_are_not_directly_importable())
    elif is_collection_package(filename):
        maybe_import_collection_package(mw, path)
    elif filename.endswith(".apkg"):
        import_anki_package(mw, path)
    else:
        raise NotImplementedError


def get_file_path(mw: aqt.main.AnkiQt) -> str | None:
    if file := getFile(
        mw,
        tr.actions_import(),
        None,
        key="import",
        filter=tr.importing_packaged_anki_deckcollection_apkg_colpkg_zip(),
    ):
        return str(file)
    return None


def is_collection_package(filename: str) -> bool:
    return (
        filename == "collection.apkg"
        or (filename.startswith("backup-") and filename.endswith(".apkg"))
        or filename.endswith(".colpkg")
    )


def maybe_import_collection_package(mw: aqt.main.AnkiQt, path: str) -> None:
    if askUser(
        tr.importing_this_will_delete_your_existing_collection(),
        msgfunc=QMessageBox.warning,
        defaultno=True,
    ):
        import_collection_package(mw, path)


def import_collection_package(mw: aqt.main.AnkiQt, file: str) -> None:
    def on_success() -> None:
        mw.loadCollection()
        tooltip(tr.importing_importing_complete())

    def on_failure(err: Exception) -> None:
        mw.loadCollection()
        if not isinstance(err, Interrupted):
            showWarning(str(err))

    QueryOp(
        parent=mw,
        op=lambda _: mw.create_backup_now(),
        success=lambda _: mw.unloadCollection(
            lambda: import_collection_package_op(mw, file, on_success)
            .failure(on_failure)
            .run_in_background()
        ),
    ).with_progress().run_in_background()


def import_collection_package_op(
    mw: aqt.main.AnkiQt, path: str, success: Callable[[], None]
) -> QueryOp[None]:
    def op(_: Collection) -> None:
        col_path = mw.pm.collectionPath()
        media_folder = os.path.join(mw.pm.profileFolder(), "collection.media")
        media_db = os.path.join(mw.pm.profileFolder(), "collection.media.db2")
        mw.backend.import_collection_package(
            col_path=col_path,
            backup_path=path,
            media_folder=media_folder,
            media_db=media_db,
        )

    return QueryOp(parent=mw, op=op, success=lambda _: success()).with_backend_progress(
        import_progress_update
    )


def import_anki_package(mw: aqt.main.AnkiQt, path: str) -> None:
    CollectionOp(
        parent=mw,
        op=lambda col: col.import_anki_package(path),
    ).with_backend_progress(import_progress_update).success(
        show_import_log
    ).run_in_background()


def show_import_log(log_with_changes: ImportLogWithChanges) -> None:
    showText(stringify_log(log_with_changes.log), plain_text_edit=True)


def stringify_log(log: ImportLogWithChanges.Log) -> str:
    total = len(log.conflicting) + len(log.updated) + len(log.new) + len(log.duplicate)
    return "\n".join(
        chain(
            (tr.importing_notes_found_in_file(val=total),),
            (
                template_string(val=len(row))
                for (row, template_string) in (
                    (log.conflicting, tr.importing_notes_that_could_not_be_imported),
                    (log.updated, tr.importing_notes_updated_as_file_had_newer),
                    (log.new, tr.importing_notes_added_from_file),
                    (log.duplicate, tr.importing_notes_skipped_as_theyre_already_in),
                )
                if row
            ),
            ("",),
            *(
                [f"[{action}] {', '.join(note.fields)}" for note in rows]
                for (rows, action) in (
                    (log.conflicting, tr.importing_skipped()),
                    (log.updated, tr.importing_updated()),
                    (log.new, tr.adding_added()),
                    (log.duplicate, tr.importing_identical()),
                )
            ),
        )
    )


def import_progress_update(progress: Progress, update: ProgressUpdate) -> None:
    if not progress.HasField("importing"):
        return
    update.label = progress.importing
    if update.user_wants_abort:
        update.abort = True