import codecs
import json
from pathlib import Path

import pandas as pd
import pyodbc

from database.db_create import get_import_config
from database.model import DatabaseInspect, create_db_ini, load_config


def compare(config_file: str = "database/CARLO.json"):
    cfg = load_config(config_file)
    create_db_ini(cfg)
    base_dir = str(Path(config_file).parent.parent.resolve())
    config = get_import_config(f"{base_dir}/config/{cfg.csv_file}", cfg.dest_dsn.database)

    source_db = DatabaseInspect(cfg.source_dsn, source=True)
    source_tables = source_db.get_tables()
    print(json.dumps(source_db.get_prefix(), indent=2))

    dest_db = DatabaseInspect(cfg.dest_dsn)
    dest_tables = dest_db.get_tables()

    for _, current_table in config.iterrows():
        dest_row_count = {}
        dest_timestamp = {}
        if current_table["dest"] in dest_tables:
            full_table_name = f'[{current_table["dest_db"]}].[{cfg.dest_dsn.schema}].[{current_table["dest"]}]'
            # pkey = dest_db.get_pkey(current_table["dest"], current_table["dest_db"])
            # cols = pkey + ["timestamp"]
            query_count_dest = f"SELECT [Client_DB], COUNT(*) as [Rows] FROM {full_table_name} GROUP BY [Client_DB]"
            q = dest_db.cursor.execute(query_count_dest)
            dest_row_count = dict([(col[0], col[1]) for col in q.fetchall()])

            query_timestamp_dest = (
                f"SELECT [Client_DB], max(timestamp) as [TS] FROM {full_table_name} GROUP BY [Client_DB]"
            )
            q = dest_db.cursor.execute(query_timestamp_dest)
            dest_timestamp = dict(
                [(col[0], "0x" + codecs.encode(col[1], "hex_codec").decode()) for col in q.fetchall()]
            )

        source_row_count = {}
        source_row_count_ts = {}

        for client_db, prefix in cfg.clients.items():
            # table_client = f'{current_table["dest"]}_{client_db}'
            source_table = current_table["source"].format(prefix)
            source_table2 = source_table.split(".")[-1][1:-1]

            if source_table in source_tables or source_table2 in source_tables:
                if not pd.isnull(current_table["query"]):
                    select_query = current_table["query"].format(prefix, cfg.filter[0], cfg.filter[1])
                elif "." in source_table or cfg.source_dsn.schema == "":
                    if source_table[0] != "[":
                        source_table = f"[{source_table}]"
                    select_query = f"SELECT T1.* FROM {source_table} T1 "
                else:
                    select_query = f"SELECT T1.* FROM [{cfg.source_dsn.schema}].[{source_table}] T1 "

                if not pd.isnull(current_table["filter"]):
                    select_query += " WHERE " + current_table["filter"].format("", cfg.filter[0], cfg.filter[1])
                query_count_source = select_query.replace("T1.*", "COUNT(*) as [Rows]")
                # print(query_count_source)

                q = source_db.cursor.execute(query_count_source)
                source_row_count[client_db] = q.fetchone()[0]

                query_ts = query_count_source
                ts = dest_timestamp.get(client_db, "0x0000000000000000")
                if "WHERE" in query_ts:
                    query_ts = query_ts.replace("WHERE", f"WHERE T1.[timestamp] <= convert(binary(8), '{ts}', 1) AND")
                else:
                    query_ts += f" WHERE T1.[timestamp] <= convert(binary(8), '{ts}', 1)"
                # print(query_ts)
                try:
                    q = source_db.cursor.execute(query_ts)
                    source_row_count_ts[client_db] = q.fetchone()[0]
                except pyodbc.ProgrammingError:
                    pass

            if dest_row_count.get(client_db, 0) != source_row_count.get(client_db, 0):
                print(f"Tabelle {current_table['dest']} mit Client {client_db} stimmt nicht ueberein.")
                print(f"  Quelle:          {source_row_count.get(client_db, 0):>8}")
                print(f"  Quelle (bis ts): {source_row_count_ts.get(client_db, 0):>8}")
                print(f"  dest:            {dest_row_count.get(client_db, 0):>8}")