'''
@author: olivier.massot
'''

import csv
import sys

from PyQt5 import uic
from PyQt5.Qt import QMainWindow, QApplication, QMessageBox, QStandardItemModel, \
    QStandardItem, Qt, QFileDialog
from path import Path


Ui_window, _ = uic.loadUiType(Path(__file__).parent / 'tsv_editor.ui')

csv.register_dialect('tsv', delimiter='\t', quotechar='', quoting=csv.QUOTE_NONE)

def exec_(filename=''):

    app = QApplication(sys.argv)

    SYS_HOOK = sys.excepthook
    def error_handler(typ, value, trace):
        while QApplication.overrideCursor():
            QApplication.restoreOverrideCursor()
        QMessageBox.critical(iface, typ.__name__, "{}".format(value))
        SYS_HOOK(typ, value, trace)
    sys.excepthook = error_handler

    if not filename:
        filename, _ = QFileDialog.getOpenFileName(None, "Selectionner un fichier TSV", ".", "Tsv Files (*.tsv *.csv)")

    iface = MainWindow(filename)
    iface.show()

    r = app.exec_()
    return r

class MainWindow(QMainWindow):

    def __init__(self, csvpath):
        super (MainWindow, self).__init__()
        self.csvpath = csvpath
        self.createWidgets()

    def createWidgets(self):
        self.ui = Ui_window()
        self.ui.setupUi(self)

        self.ui.btn_cancel.clicked.connect(self.cancel)
        self.ui.btn_ok.clicked.connect(self.ok)

        self.model = QStandardItemModel(self)
        self.ui.tbl_data.setModel(self.model)
        self.ui.lbl_path.setText(self.csvpath)

        with open(self.csvpath, newline='') as csvfile:
            reader = csv.reader(csvfile, 'tsv')
            self.headers = next(reader)
            self.model.setHorizontalHeaderLabels(self.headers)
            for row in reader:
                items = [ QStandardItem(field) for field in row ]
                self.model.appendRow(items)

    def ok(self):
        with open(self.csvpath, "w", newline='') as fileOutput:
            writer = csv.writer(fileOutput, "tsv")
            writer.writerow(self.headers)
            for rowNumber in range(self.model.rowCount()):
                fields = [self.model.data(self.model.index(rowNumber, columnNumber), Qt.DisplayRole)
                          for columnNumber in range(self.model.columnCount())]
                writer.writerow(fields)
        self.close()

    def cancel(self):
        self.close()


if __name__ == '__main__':
    exec_()