# 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 typing import List, Optional, Sequence

import aqt
from anki.lang import TR
from anki.notes import NoteID
from aqt import AnkiQt, QWidget
from aqt.qt import QDialog, Qt
from aqt.utils import (
    HelpPage,
    disable_help_button,
    openHelp,
    qconnect,
    restore_combo_history,
    restore_combo_index_for_session,
    restore_is_checked,
    restoreGeom,
    save_combo_history,
    save_combo_index_for_session,
    save_is_checked,
    saveGeom,
    tooltip,
    tr,
)


def find_and_replace(
    *,
    mw: AnkiQt,
    parent: QWidget,
    note_ids: Sequence[NoteID],
    search: str,
    replacement: str,
    regex: bool,
    field_name: Optional[str],
    match_case: bool,
) -> None:
    mw.perform_op(
        lambda: mw.col.find_and_replace(
            note_ids=note_ids,
            search=search,
            replacement=replacement,
            regex=regex,
            field_name=field_name,
            match_case=match_case,
        ),
        success=lambda out: tooltip(
            tr(TR.FINDREPLACE_NOTES_UPDATED, changed=out.count, total=len(note_ids)),
            parent=parent,
        ),
    )


def find_and_replace_tag(
    *,
    mw: AnkiQt,
    parent: QWidget,
    note_ids: Sequence[int],
    search: str,
    replacement: str,
    regex: bool,
    match_case: bool,
) -> None:
    mw.perform_op(
        lambda: mw.col.tags.find_and_replace(
            note_ids=note_ids,
            search=search,
            replacement=replacement,
            regex=regex,
            match_case=match_case,
        ),
        success=lambda out: tooltip(
            tr(TR.FINDREPLACE_NOTES_UPDATED, changed=out.count, total=len(note_ids)),
            parent=parent,
        ),
    )


class FindAndReplaceDialog(QDialog):
    COMBO_NAME = "BrowserFindAndReplace"

    def __init__(
        self, parent: QWidget, *, mw: AnkiQt, note_ids: Sequence[NoteID]
    ) -> None:
        super().__init__(parent)
        self.mw = mw
        self.note_ids = note_ids
        self.field_names: List[str] = []

        # fetch field names and then show
        mw.query_op(
            lambda: mw.col.field_names_for_note_ids(note_ids),
            success=self._show,
        )

    def _show(self, field_names: Sequence[str]) -> None:
        # add "all fields" and "tags" to the top of the list
        self.field_names = [
            tr(TR.BROWSING_ALL_FIELDS),
            tr(TR.EDITING_TAGS),
        ] + list(field_names)

        disable_help_button(self)
        self.form = aqt.forms.findreplace.Ui_Dialog()
        self.form.setupUi(self)
        self.setWindowModality(Qt.WindowModal)

        self._find_history = restore_combo_history(
            self.form.find, self.COMBO_NAME + "Find"
        )
        self.form.find.completer().setCaseSensitivity(True)
        self._replace_history = restore_combo_history(
            self.form.replace, self.COMBO_NAME + "Replace"
        )
        self.form.replace.completer().setCaseSensitivity(True)

        restore_is_checked(self.form.re, self.COMBO_NAME + "Regex")
        restore_is_checked(self.form.ignoreCase, self.COMBO_NAME + "ignoreCase")

        self.form.field.addItems(self.field_names)
        restore_combo_index_for_session(
            self.form.field, self.field_names, self.COMBO_NAME + "Field"
        )

        qconnect(self.form.buttonBox.helpRequested, self.show_help)

        restoreGeom(self, "findreplace")
        self.show()
        self.form.find.setFocus()

    def accept(self) -> None:
        saveGeom(self, "findreplace")
        save_combo_index_for_session(self.form.field, self.COMBO_NAME + "Field")

        search = save_combo_history(
            self.form.find, self._find_history, self.COMBO_NAME + "Find"
        )
        replace = save_combo_history(
            self.form.replace, self._replace_history, self.COMBO_NAME + "Replace"
        )
        regex = self.form.re.isChecked()
        match_case = not self.form.ignoreCase.isChecked()
        save_is_checked(self.form.re, self.COMBO_NAME + "Regex")
        save_is_checked(self.form.ignoreCase, self.COMBO_NAME + "ignoreCase")

        if self.form.field.currentIndex() == 1:
            # tags
            find_and_replace_tag(
                mw=self.mw,
                parent=self.parentWidget(),
                note_ids=self.note_ids,
                search=search,
                replacement=replace,
                regex=regex,
                match_case=match_case,
            )
            return

        if self.form.field.currentIndex() == 0:
            field = None
        else:
            field = self.field_names[self.form.field.currentIndex() - 2]

        find_and_replace(
            mw=self.mw,
            parent=self.parentWidget(),
            note_ids=self.note_ids,
            search=search,
            replacement=replace,
            regex=regex,
            field_name=field,
            match_case=match_case,
        )

        super().accept()

    def show_help(self) -> None:
        openHelp(HelpPage.BROWSING_FIND_AND_REPLACE)