"""
Import compliance backup into local PostgreSQL.
Fixes Python-style lists/dicts in JSONB fields to valid JSON.
"""
import ast
import gzip
import json
import re
import sys
import psycopg2

DB_URL = "postgresql://breakpilot:breakpilot123@localhost:5432/breakpilot_db"
BACKUP_PATH = "/tmp/compliance-db-2026-03-28_16-25-19.sql.gz"

# Tables with JSONB columns that need Python→JSON conversion
JSONB_TABLES = {
    "canonical_controls",
    "canonical_controls_pre_dedup",
    "obligation_candidates",
    "control_dedup_reviews",
    "canonical_generation_jobs",
    "canonical_processed_chunks",
}


def fix_python_value(val: str) -> str:
    """Convert Python repr to JSON string for JSONB fields."""
    if val == "NULL":
        return None
    # Strip outer SQL quotes
    if val.startswith("'") and val.endswith("'"):
        # Unescape SQL single quotes
        inner = val[1:-1].replace("''", "'")
    else:
        return val

    # Try to parse as Python literal and convert to JSON
    try:
        obj = ast.literal_eval(inner)
        return json.dumps(obj, ensure_ascii=False)
    except (ValueError, SyntaxError):
        # Already valid JSON or plain string
        return inner


def process_line(line: str, conn) -> bool:
    """Process a single SQL line. Returns True if it was an INSERT."""
    line = line.strip()
    if not line.startswith("INSERT INTO"):
        if line.startswith("SET "):
            return False
        return False

    # Execute directly for non-JSONB tables
    table_match = re.match(r'INSERT INTO "(\w+)"', line)
    if not table_match:
        return False
    table = table_match.group(1)

    if table not in JSONB_TABLES:
        # Execute as-is
        try:
            with conn.cursor() as cur:
                cur.execute(line)
            return True
        except Exception as e:
            conn.rollback()
            return False

    # For JSONB tables: use psycopg2 parameterized query
    # Extract column names and values
    cols_match = re.match(r'INSERT INTO "\w+" \(([^)]+)\) VALUES \(', line)
    if not cols_match:
        return False

    col_names = [c.strip().strip('"') for c in cols_match.group(1).split(",")]

    # Extract VALUES portion
    vals_start = line.index("VALUES (") + 8
    vals_str = line[vals_start:-2]  # Remove trailing );

    # Parse SQL values (handling nested quotes and parentheses)
    values = []
    current = ""
    in_quote = False
    depth = 0
    i = 0
    while i < len(vals_str):
        c = vals_str[i]
        if in_quote:
            if c == "'" and i + 1 < len(vals_str) and vals_str[i + 1] == "'":
                current += "''"
                i += 2
                continue
            elif c == "'":
                current += "'"
                in_quote = False
            else:
                current += c
        else:
            if c == "'":
                current += "'"
                in_quote = True
            elif c == "(" :
                depth += 1
                current += c
            elif c == ")":
                depth -= 1
                current += c
            elif c == "," and depth == 0:
                values.append(current.strip())
                current = ""
            else:
                current += c
        i += 1
    values.append(current.strip())

    if len(values) != len(col_names):
        # Fallback: try direct execution
        try:
            with conn.cursor() as cur:
                cur.execute(line)
            return True
        except Exception:
            conn.rollback()
            return False

    # Convert values
    params = []
    placeholders = []
    for col, val in zip(col_names, values):
        if val == "NULL":
            params.append(None)
            placeholders.append("%s")
        elif val in ("TRUE", "true"):
            params.append(True)
            placeholders.append("%s")
        elif val in ("FALSE", "false"):
            params.append(False)
            placeholders.append("%s")
        elif val.startswith("'") and val.endswith("'"):
            inner = val[1:-1].replace("''", "'")
            # Check if this looks like a Python literal (list/dict)
            stripped = inner.strip()
            if stripped and stripped[0] in ("[", "{") and stripped not in ("[]", "{}"):
                try:
                    obj = ast.literal_eval(inner)
                    params.append(json.dumps(obj, ensure_ascii=False))
                except (ValueError, SyntaxError):
                    params.append(inner)
            else:
                params.append(inner)
            placeholders.append("%s")
        else:
            # Numeric or other
            try:
                if "." in val:
                    params.append(float(val))
                else:
                    params.append(int(val))
            except ValueError:
                params.append(val)
            placeholders.append("%s")

    col_list = ", ".join(f'"{c}"' for c in col_names)
    ph_list = ", ".join(placeholders)
    sql = f'INSERT INTO "{table}" ({col_list}) VALUES ({ph_list})'

    try:
        with conn.cursor() as cur:
            cur.execute(sql, params)
        return True
    except Exception as e:
        conn.rollback()
        if "duplicate key" not in str(e):
            print(f"  ERROR [{table}]: {str(e)[:120]}", file=sys.stderr)
        return False


def main():
    conn = psycopg2.connect(DB_URL)
    conn.autocommit = True

    with conn.cursor() as cur:
        cur.execute("SET search_path TO compliance, public")

    total = 0
    ok = 0
    errors = 0

    print(f"Reading {BACKUP_PATH}...")
    with gzip.open(BACKUP_PATH, "rt", encoding="utf-8") as f:
        buffer = ""
        for line in f:
            buffer += line
            if not buffer.rstrip().endswith(";"):
                continue
            # Complete SQL statement
            stmt = buffer.strip()
            buffer = ""

            if not stmt.startswith("INSERT"):
                continue

            total += 1
            if process_line(stmt, conn):
                ok += 1
            else:
                errors += 1

            if total % 10000 == 0:
                print(f"  {total:>8} processed, {ok} ok, {errors} errors")

    print(f"\nDONE: {total} total, {ok} ok, {errors} errors")
    conn.close()


if __name__ == "__main__":
    main()