"""
"""
import importlib
import logging
from qgis.core import QgsProject  # @UnresolvedImport

from PyQt5 import QtWidgets
from PyQt5 import uic
from PyQt5.Qt import QIcon, QPixmap, Qt, QTableWidgetItem, QHeaderView
from PyQt5.QtWidgets import QApplication

from core.constants import MAIN, RSCDIR


logger = logging.getLogger("mncheck")

Ui_Main, _ = uic.loadUiType(MAIN / 'ui'/ 'dlg_main.ui')
Ui_ChkFrame, _ = uic.loadUiType(MAIN / 'ui'/ 'checkframe.ui')


SCHEMAS = ["mn1_rec", "mn2_rec", "mn3_pro", "mn3_exe", "mn3_rec"]


class DlgMain(QtWidgets.QDialog):
    def __init__(self, iface, parent=None):
        super(DlgMain, self).__init__(parent)
        self.createWidgets()
        self.iface = iface
        self.schema_lib = None

    def createWidgets(self):
        """ set up the interface """
        self.ui = Ui_Main()
        self.ui.setupUi(self)
        
        self.ui.btn_run.setIcon(QIcon(RSCDIR / "play.png"))
        self.ui.btn_run.clicked.connect(self.run)
        
        self.ui.btn_help.setIcon(QIcon(RSCDIR / "question.png"))
        self.ui.btn_help.clicked.connect(self.show_help)
        
        self.ui.btn_settings.setIcon(QIcon(RSCDIR / "settings.png"))
        self.ui.btn_settings.clicked.connect(self.show_settings)

        self.ui.tbl_layers.horizontalHeaderItem(1).setTextAlignment(Qt.AlignLeft)

        self.ui.cbb_schemas.addItem("Schéma MN v1 REC", 0)
        self.ui.cbb_schemas.addItem("Schéma MN v2 REC", 1)
#         self.ui.cbb_schemas.addItem("Schéma MN v3 PRO", 2)
#         self.ui.cbb_schemas.addItem("Schéma MN v3 EXE", 3)
#         self.ui.cbb_schemas.addItem("Schéma MN v3 REC", 4)
        self.ui.cbb_schemas.currentIndexChanged.connect(self.update_layers_list)
        
        self.update_layers_list()
    
    def clear_layers_table(self):
        while self.ui.tbl_layers.rowCount():
            self.ui.tbl_layers.removeRow(0)
    
    def selected_validator(self):
        schema_lib_name = SCHEMAS[int(self.ui.cbb_schemas.itemData(self.ui.cbb_schemas.currentIndex()))]
        logger.info("Selected schema: %s", schema_lib_name)
    
        schema_lib = importlib.import_module("schemas." + schema_lib_name)
        return schema_lib.Validator
    
    def update_layers_list(self):
        
        validator = self.selected_validator()

        expected = [model.layername for model in validator.models]
        logger.info("Expected layers: %s", str(expected))

        found = [layer.name().lower() for layer in QgsProject.instance().mapLayers().values()]
        logger.info("Found layers: %s", str(found))

        self.ui.btn_run.setEnabled(True)

        self.clear_layers_table()

        for layername in expected:
            
            cur_row = self.ui.tbl_layers.rowCount()
            self.ui.tbl_layers.insertRow(cur_row)
            
            lbl_icon, lbl_layer, lbl_message = QTableWidgetItem(), QTableWidgetItem(), QTableWidgetItem()

            lbl_layer.setText(layername)

            if layername.lower() in found:
                lbl_icon.setIcon(QIcon(QPixmap(RSCDIR / "ok_16.png")))
            else:
                lbl_icon.setIcon(QIcon(QPixmap(RSCDIR / "error_16.png")))
                lbl_message.setText("La couche est introuvable")
                self.ui.btn_run.setEnabled(False)
                
            self.ui.tbl_layers.setItem(cur_row, 0, lbl_icon)
            self.ui.tbl_layers.setItem(cur_row, 1, lbl_layer)
            self.ui.tbl_layers.setItem(cur_row, 2, lbl_message)
        
        self.ui.tbl_layers.horizontalHeader().setSectionResizeMode(0, QHeaderView.Fixed)
        self.ui.tbl_layers.horizontalHeader().setSectionResizeMode(1, QHeaderView.ResizeToContents)
        self.ui.tbl_layers.horizontalHeader().setSectionResizeMode(2, QHeaderView.Stretch)

    def run(self):
        
        QApplication.setOverrideCursor(Qt.WaitCursor)
        self.clear_layers_table()
        
        validator = self.selected_validator()
        
        if not validator:
            logger.info("Aucun schéma sélectionné - Opération annulée")
            return
        
        report = validator.submit(self.iface)
        
        logger.debug(report)
        
        for chk in report["checkpoints"]:
            cur_row = self.ui.tbl_layers.rowCount()
            self.ui.tbl_layers.insertRow(cur_row)
            
            lbl_icon, lbl_checkpoint = QTableWidgetItem(), QTableWidgetItem()
            
            lbl_checkpoint.setText(chk["name"])
            lbl_icon.setIcon(QIcon(QPixmap(RSCDIR / ("ok_16.png" if chk["valid"] else "error_16.png"))))
            
            self.ui.tbl_layers.setItem(cur_row, 0, lbl_icon)
            self.ui.tbl_layers.setItem(cur_row, 1, lbl_checkpoint)
            if not chk["valid"]:
                self.ui.tbl_layers.setItem(cur_row, 2, QTableWidgetItem("Des erreurs ont été trouvées"))

        
        for type_err in report["errors"]:
            for err in report["errors"][type_err]["list"]:
                cur_row = self.ui.tbl_layers.rowCount()
                self.ui.tbl_layers.insertRow(cur_row)
                
                lbl_icon, lbl_field, lbl_err = QTableWidgetItem(), QTableWidgetItem(), QTableWidgetItem()
                
                lbl_field.setText(f"{err['layername']}.{err['field']}")
                lbl_err.setText(f"{type_err}: {err['message']}")
#                 lbl_icon.setIcon(QIcon(QPixmap(RSCDIR / "error_16.png")))
                
#                 self.ui.tbl_layers.setItem(cur_row, 0, lbl_icon)
                self.ui.tbl_layers.setItem(cur_row, 1, lbl_field)
                self.ui.tbl_layers.setItem(cur_row, 2, lbl_err)
    
        QApplication.restoreOverrideCursor()
    
    def show_help(self):
        pass
    
    def show_settings(self):
        pass