import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, GObject
from mods.files import choose_diagnosis_win_file, diagnosis_row_ui_str
from mods.utils import ConditionalFilter, enable_widget, disable_widget
from mods.db import DiagnosisCategory, Diagnosis, DiagnosisIndex, db
import re

class DiagnosisFilter(ConditionalFilter):
    cat = None
    def filter(self, query):
        if query != self.fstr:
            self.fstr = query
            self.ids = list(map(lambda x:x.id, self.search_func(self.cat, query)))
        return self.ids

class DiagnosisRow(Gtk.ListBoxRow):
    @GObject.Property
    def db_id(self):
        return self._db_id
    @db_id.setter
    def db_id_setter(self, value):
        self._db_id = value

def cats_subcats(cat):
    cats = [cat]
    def append_cat(cat_obj):
        cats.append(cat_obj)
        for c in cat_obj.subcat:
            append_cat(c)
    for c in cat.subcat:
        append_cat(c)
    return cats

def get_categories(parent=None):
    with db.atomic():
        return DiagnosisCategory.select().where(DiagnosisCategory.parent == parent)
def get_reception_diagnosisses(cat=None):
    with db.atomic():
        if cat:
            d = list(Diagnosis.select().where(Diagnosis.category == cat).order_by(Diagnosis.code))
            return d
        else:
            return Diagnosis.select()
def get_category(cat_id):
    with db.atomic():
        return DiagnosisCategory.get_by_id(cat_id)
def get_giagnosis(diag_id):
    with db.atomic():
        return Diagnosis.get_by_id(diag_id)
def search_diagnosises(cat, q):
    q = re.sub(r'\s+', ' ', q).strip()
    q = ' '.join([ f'{x}*' for x in q.split(' ')])
    with db.atomic():
        return (Diagnosis.select()
                .join(
                    DiagnosisIndex,
                    on=(Diagnosis.id == DiagnosisIndex.rowid))
                .where((Diagnosis.category == cat) & (DiagnosisIndex.match(q)))
                .order_by(DiagnosisIndex.bm25()))
diagnosis_filter = DiagnosisFilter(search_diagnosises)
########################################################
def build_diagnosis_row(diagnosis):
    b = Gtk.Builder()
    b.add_from_string(diagnosis_row_ui_str)
    win = b.get_object('win')
    box = b.get_object('diagnosis_box')
    b.get_object('title').set_markup(f'<span size="x-large">{diagnosis.code:<8} {diagnosis.title}</span>')
    win.remove(win.get_children()[0])
    row = DiagnosisRow()
    row.props.db_id = diagnosis.id
    row.add(box)
    return row

def create_choose_diagnosis_win(reception_b):
    b = Gtk.Builder()
    rd_list = reception_b.get_object('diagnosis_list')
    class ChooseDiagnosisWinHandler:
        def cat_selection_changed(self, cat_selection):
            sel_iter = cat_selection.get_selected()[1]
            model = cat_selection.get_tree_view().get_model()
            category = get_category(model.get_value(sel_iter, 1))
            diagnosis_filter.cat = category
            diagnosis_list.unselect_all()
            self.diagnosis_row_unselected()
            self.redraw_diagnosis_list(category)
        def redraw_diagnosis_list(self, cat):
            for c in diagnosis_list.get_children():
                diagnosis_list.remove(c)
            for d in get_reception_diagnosisses(cat):
                diagnosis_list.add(build_diagnosis_row(d))
            diagnosis_list.show_all()
        def diagnosis_row_selected(self, *a):
            enable_widget([accept_button])
        def diagnosis_row_unselected(self, *a):
            disable_widget([accept_button])
        def diagnosis_filter_changed(self, filter_widget):
            diagnosis_list.unselect_all()
            self.diagnosis_row_unselected()
            diagnosis_list.invalidate_filter()
        def submit(self, button):
            from mods.receptions import build_reception_diagnosis_row
            exist_rows = list(map(lambda x: x.props.db_id, rd_list.get_children()))
            rows = diagnosis_list.get_selected_rows()
            for row in rows:
                if row.props.db_id not in exist_rows:
                    diagnosis = get_giagnosis(row.props.db_id)
                    rd_list.add(build_reception_diagnosis_row(diagnosis))
            rd_list.show_all()
            w.destroy()
    b.add_from_file(choose_diagnosis_win_file)
    b.connect_signals(ChooseDiagnosisWinHandler())
    cat_liststore = b.get_object('category_list')
    def insert_cat(cat, parent=None):
        cur_parent = cat_liststore.append(parent, [cat.title, cat.id])
        for c in get_categories(cat):
            insert_cat(c, cur_parent)
    for c in get_categories():
        insert_cat(c)
    diagnosis_list = b.get_object('diagnosis_list')
    di_filter = b.get_object('diagnosis_filter')
    accept_button = b.get_object('accept_button')
    #####
    def diagnosis_filter_func(row):
        fstr = di_filter.get_text().strip()
        if not fstr:
            diagnosis_filter.reset()
            return True
        return row.props.db_id in diagnosis_filter.filter(fstr)
    #####
    diagnosis_list.set_filter_func(diagnosis_filter_func)
    w = b.get_object('choose_diagnosis_window')
    return w