import sqlite3
import os

DB_PATH = os.path.join(os.path.dirname(__file__), "onever_drive.db")

def migrate():
    print(f"Connecting to database at {DB_PATH}...")
    conn = sqlite3.connect(DB_PATH)
    cursor = conn.cursor()

    # 1. Add local_destination_path column to backup_jobs table
    try:
        cursor.execute("ALTER TABLE backup_jobs ADD COLUMN local_destination_path VARCHAR(1024) NULL")
        print("Column 'local_destination_path' added successfully to backup_jobs.")
    except sqlite3.OperationalError as e:
        print(f"Column 'local_destination_path' could not be added (maybe it already exists?): {e}")

    # 2. Create job_runs table
    try:
        cursor.execute("""
        CREATE TABLE IF NOT EXISTS job_runs (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            job_id INTEGER NOT NULL,
            client_id INTEGER NOT NULL,
            started_at DATETIME NOT NULL,
            completed_at DATETIME NULL,
            status VARCHAR(50) NOT NULL DEFAULT 'RUNNING',
            files_scanned INTEGER NOT NULL DEFAULT 0,
            files_copied INTEGER NOT NULL DEFAULT 0,
            files_skipped INTEGER NOT NULL DEFAULT 0,
            errors_count INTEGER NOT NULL DEFAULT 0,
            bytes_transferred BIGINT NOT NULL DEFAULT 0,
            error_summary TEXT NULL,
            FOREIGN KEY(job_id) REFERENCES backup_jobs(id) ON DELETE CASCADE,
            FOREIGN KEY(client_id) REFERENCES clients(id) ON DELETE CASCADE
        )
        """)
        print("Table 'job_runs' created successfully.")
    except sqlite3.OperationalError as e:
        print(f"Table 'job_runs' could not be created: {e}")

    conn.commit()
    conn.close()
    print("Migration finished.")

if __name__ == "__main__":
    migrate()