import sys
from pathlib import Path

# Add parent directory to Python path so we can import helpers
parent_dir = Path(__file__).parent.parent
sys.path.insert(0, str(parent_dir))

from helpers.config import get_db_connection

# Output folder: ITSA/Database Backups/SQL Views/
ITSA_ROOT = Path(__file__).parent.parent.parent.parent
OUTPUT_DIR = ITSA_ROOT / "Database Backups" / "SQL Views"


def dump_views():
    OUTPUT_DIR.mkdir(parents=True, exist_ok=True)

    conn = get_db_connection()
    cur = conn.cursor()

    # Fetch all user-defined views (exclude system schemas)
    cur.execute("""
        SELECT schemaname, viewname, definition
        FROM pg_views
        WHERE schemaname NOT IN ('pg_catalog', 'information_schema')
        ORDER BY schemaname, viewname
    """)

    views = cur.fetchall()
    print(f"Found {len(views)} views\n")

    for schema, view_name, definition in views:
        sql = f"CREATE OR REPLACE VIEW {schema}.{view_name} AS\n{definition.rstrip()};\n"

        filename = f"{schema}.{view_name}.sql" if schema != "public" else f"{view_name}.sql"
        filepath = OUTPUT_DIR / filename

        filepath.write_text(sql, encoding="utf-8")
        print(f"  Dumped: {filename}")

    cur.close()
    conn.close()
    print(f"\nDone — {len(views)} views saved to:\n  {OUTPUT_DIR}")


if __name__ == "__main__":
    dump_views()