import os
import sys
import argparse
from ioconverter import ExcelConverter
import json

def prepare_data(rawdata:dict):
    sensors = rawdata["sensors"]
    dsensors = dict()
    lsensors = list()
    for sname, sdata in sensors.items():
        data = {
            "id": sdata.get("IO", ""),
            "bezeichnung": sdata.get("BEZEICHNUNG", ""),
            "verwendung": sdata.get("VERW", ""),
            "kennzeichnung": sdata.get("KENNZEICHNUNG", ""),
            "text_d": sdata.get("TEXT-D", ""),
            "text_e": sdata.get("TEXT-E", ""),
            "text_es": sdata.get("TEXT-ES", ""),
            "text_f": sdata.get("TEXT-F", ""),
            "sps": sdata.get("SPS", None),
        }
        reihenfolge = ["id", "bezeichnung", "verwendung", "kennzeichnung", "text_d", "text_e", "text_es", "text_f"]
        # CSV-String erzeugen
        csvstr = "','".join(str(data[key]) for key in reihenfolge)
        csvstr = "'"+csvstr+"'"

        sps_nr = None
        if "SPS" in sdata: 
            sps_nr = sdata.get("SPS", None)

        if sps_nr:
            if sps_nr not in dsensors:
                dsensors[sps_nr] = list()
            dsensors[sps_nr].append(csvstr)
        else:
            lsensors.append(csvstr) 

    return (dsensors, lsensors)


# Funktionen
def load_json(jsonfilename):
    with open(jsonfilename, encoding='utf-8') as fh:
        return json.load(fh)

def check_file_in_work(work_dir, filename):
    fexists = True
    if not os.path.exists(filename):
        mypath = os.path.join(work_dir, filename)
        if not os.path.exists(mypath):
            fexists = False
    else:
        mypath = filename
    return (mypath, fexists)

# Helper für Export
def do_export(conv_obj:ExcelConverter, mode_str, output_dir, base_input, lines):
    # Für WSCAD Dateinamen anpassen (Export-Typ bleibt "WSCAD" oder "WSCAD mit Bezug")
    if mode_str == "WSCAD":
        export_type = "WSCAD" if args.no_bezug else "WSCAD mit Bezug"
        filename = f"{base_input}_{'WSCAD_no_Bezug' if args.no_bezug else 'WSCAD'}.xlsx"
    else:
        export_type = mode_str
        filename = f"{base_input}_{mode_str}.xlsx"

    if args.output and args.mode == mode_str: 
        export_path = args.output 
    else:
        export_path = os.path.join(output_dir, filename)

    try:
        conv_obj.export_excel(lines, export_type, export_path)
        print(f"Export '{export_type}' erfolgreich: {export_path}")
    except Exception as e:
        print(f"Fehler bei Export '{export_type}': {e}")


def do_exports(export_mode, converter, output_dir, input_basename, lines):
    if export_mode:
        do_export(converter, export_mode, output_dir, input_basename, lines)
    else:
        # Kein Modus → alle drei exportieren
        do_export(converter, "EA", output_dir, input_basename, lines)
        do_export(converter, "TIA", output_dir, input_basename, lines)
        do_export(converter, "WSCAD", output_dir, input_basename, lines)

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Excel-Konverter für BMK-Daten")
    parser.add_argument("--mode", type=str, choices=["EA", "TIA", "WSCAD"],
                    help="Art des Exports (EA, TIA, WSCAD). Wenn nicht gesetzt, werden alle drei erzeugt.")
    parser.add_argument("--input", type=str, help="Pfad zur Eingabedatei (.txt)")
    parser.add_argument("--positions", type=str, help="Json Datei von getpositions.py (.json)")
    parser.add_argument("--output", type=str, help="Pfad zur Zieldatei (.xlsx)")
    parser.add_argument("--no-bezug", action="store_true", help="(Nur bei WSCAD) Export ohne Bezugsinformationen")
    
    args = parser.parse_args()

    # Umgebungsvariablen
    work_dir = os.environ.get("PROJECT_WORK")
    config_dir = os.environ.get("PROJECT_CFG")


    # Converter initialisieren
    converter = ExcelConverter()
    output_dir = os.environ.get("PROJECT_WORK", os.getcwd())

    # Konfigurationsdatei
    # config = configparser.ConfigParser(allow_no_value=True, delimiters=("="))
    # config.optionxform = lambda option: option  # preserve case for letters
    # config.read(os.path.join(config_dir, "xxxx.cfg"))
    export_mode = None
    if args.mode:
        export_mode = args.mode


    # Datei einlesen
    if args.input:
        # Wenn Input Pfad kein absoluter Pfad, dann in work nach Dateinamen suchen
        if not os.path.isabs(args.input):
            if work_dir:
                args.input = os.path.join(work_dir, args.input)

        input_basename = os.path.splitext(os.path.basename(args.input))[0]
        try:
            with open(args.input, "r", encoding="utf-8") as f:
                lines = f.readlines()
        except Exception as e:
            print(f"Fehler beim Lesen der Datei: {e}")
            sys.exit(1)
        do_exports(export_mode, converter, output_dir, input_basename, lines)

    elif args.positions:
        input_basename = os.path.splitext(os.path.basename(args.positions))[0]
        json_file = args.positions
        (json_path, dexists) = check_file_in_work(work_dir, json_file)
        if not dexists:
            print(f"file {json_file} does not exist")
            parser.print_help()
            exit()
        rawdata = load_json(json_path)
        (dsensors, lsensors) = prepare_data(rawdata)
        if len(dsensors) == 0:
            do_exports(export_mode, converter, output_dir, input_basename, lsensors)
        else:
            for sps_nr, lines in dsensors.items():
                name = f"{sps_nr}{input_basename}"
                do_exports(export_mode, converter, output_dir, name, lines)

    else:
        parser.print_help()
        exit()