#!/usr/bin/env python3
"""
Database migration: Client Portal (M1).

Adds the authoritative client link to projects:
  - projects.client_id  (TEXT, nullable)  -> clients.id

The `clients` and `client_access_tokens` tables are created automatically by
SQLAlchemy `create_all` at app startup (they're brand-new tables), so this
migration only handles the column that create_all won't add to an existing
`projects` table.

Run once per database:
    docker exec terra-view-terra-view-1 python3 backend/migrate_add_client_portal.py
"""

import sqlite3
from pathlib import Path


def migrate():
    possible_paths = [
        Path("data/seismo_fleet.db"),
        Path("data/sfm.db"),
        Path("data/seismo.db"),
    ]
    db_path = next((p for p in possible_paths if p.exists()), None)
    if db_path is None:
        print(f"Database not found in any of: {[str(p) for p in possible_paths]}")
        print("A fresh DB created via models.py will include projects.client_id automatically.")
        return

    print(f"Using database: {db_path}")
    conn = sqlite3.connect(db_path)
    cursor = conn.cursor()

    cursor.execute("PRAGMA table_info(projects)")
    existing = {row[1] for row in cursor.fetchall()}

    if "client_id" not in existing:
        try:
            cursor.execute("ALTER TABLE projects ADD COLUMN client_id TEXT")
            print("✓ Added column: projects.client_id (TEXT)")
        except sqlite3.OperationalError as e:
            print(f"✗ Failed to add projects.client_id: {e}")
    else:
        print("○ Column already exists: projects.client_id")

    conn.commit()
    conn.close()
    print("\n✓ Client-portal migration complete.")
    print("  Note: `clients` + `client_access_tokens` tables auto-create on app startup.")


if __name__ == "__main__":
    migrate()