import os
import csv

# Directory radice dei CSV (adatta se serve)
BASE_PATH = "estratti"
OUT_SQL = "tabelle_generate.sql"

# Funzione per indovinare il tipo SQL
def guess_sql_type(colname):
    col = colname.lower()
    if "id" in col or "cod" in col:
        return "VARCHAR(32)"
    if "data" in col or "dt_" in col or col.startswith("dt"):
        return "DATE"
    if "importo" in col or "saldo" in col or "euro" in col or "consistenza" in col or "credito" in col:
        return "DECIMAL(12,2)"
    if "note" in col or "descr" in col or "oggetto" in col:
        return "TEXT"
    if "anno" in col or "mese" in col or "num" in col or col.startswith("n_") or "progressivo" in col:
        return "INT"
    if "email" in col:
        return "VARCHAR(255)"
    return "VARCHAR(128)"

def table_name_from_path(path):
    # es: estratti/0021/generale_stabile/Elenco_destinatari_PEC.csv -> t_0021__generale_stabile__Elenco_destinatari_PEC
    rel_path = os.path.relpath(path, BASE_PATH)
    rel_path = rel_path.replace(os.sep, "__").replace(".csv", "")
    if rel_path[0].isdigit():
        rel_path = "t_" + rel_path
    else:
        rel_path = "t_global__" + rel_path
    return rel_path

# Scansione ricorsiva e generazione
sql_statements = []
for root, dirs, files in os.walk(BASE_PATH):
    for file in files:
        if file.lower().endswith(".csv"):
            full_path = os.path.join(root, file)
            with open(full_path, newline='', encoding="utf-8") as f:
                reader = csv.reader(f)
                header = next(reader)
            tname = table_name_from_path(full_path)
            sql = [f"-- {full_path} -> {tname}"]
            sql.append(f"CREATE TABLE IF NOT EXISTS `{tname}` (")
            sql.append("  id INT AUTO_INCREMENT PRIMARY KEY,")
            sql.append("  id_amministratore VARCHAR(32),")
            sql.append("  id_condominio VARCHAR(32),")
            for h in header:
                colname = h.strip().replace(" ", "_").replace("-", "_")
                sqltype = guess_sql_type(colname)
                sql.append(f"  `{colname}` {sqltype},")
            sql.append("  import_hash VARCHAR(64)")
            sql.append(") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;\n")
            sql_statements.append("\n".join(sql))

# Salva tutto su file
with open(OUT_SQL, "w", encoding="utf-8") as out:
    out.write("\n".join(sql_statements))

print(f"File SQL generato: {OUT_SQL}")