"""Build compact-format schema sequence matching paper's HF SFT dataset:
   table lists , columns = [
     lists.list_id | primary key ; type: integer ; values: 1
     ...
   ]
   foreign keys:
   ...
"""
import sys, os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
from utils.db_utils import detect_special_char, add_quotation_mark


def get_compact_schema(schema, max_values=2):
    out = "database schema:\n"
    for table in schema["schema_items"]:
        tname = table["table_name"]
        if detect_special_char(tname): tname = add_quotation_mark(tname)
        col_lines = []
        for cname, ctype, ccomment, ccontent, pk, *_ in zip(
            table["column_names"], table["column_types"], table["column_comments"],
            table["column_contents"], table["pk_indicators"]
        ):
            disp = add_quotation_mark(cname) if detect_special_char(cname) else cname
            qualified = f"{tname}.{disp}"
            parts = []
            if pk: parts.append("primary key")
            parts.append(f"type: {ctype}")
            if ccomment: parts.append(f"meaning: {ccomment}")
            if ccontent:
                vals = " , ".join(str(v) for v in ccontent[:max_values])
                parts.append(f"values: {vals}")
            col_lines.append(f"  {qualified} | " + " ; ".join(parts))
        out += f"table {tname} , columns = [\n" + "\n".join(col_lines) + "\n]\n"
    if schema.get("foreign_keys"):
        out += "foreign keys:\n"
        for fk in schema["foreign_keys"]:
            fk = [add_quotation_mark(p) if detect_special_char(p) else p for p in fk]
            out += f"{fk[0]}.{fk[1]} = {fk[2]}.{fk[3]}\n"
    else:
        out += "foreign keys: None\n"
    return out.strip()


if __name__ == "__main__":
    import json
    dev = json.load(open('data/rebuttal_sft_bird_dev_text2sql.json'))
    s = dev[0]
    print(get_compact_schema(s['schema'])[:2000])