# Generated by hand on 2026-01-01
# Converges machine app for 0.8.6rc0 → 0.9.x migration path
# Drops old Binary table and ensures Binary table exists

from django.db import migrations, connection


def converge_binary_table(apps, schema_editor):
    """
    Drop machine_installedbinary if it exists (0.8.6rc0 path).
    Create machine_binary if it doesn't exist (needed by Process model).
    """
    # sqlite-only legacy convergence: on a fresh install machine_binary already
    # exists with the final column set (created by 0001), so every branch below
    # is a no-op schema-wise. A non-sqlite DB never carries the 0.8.x legacy
    # shapes this repairs, and its Binary table already matches migration state.
    if schema_editor.connection.vendor != "sqlite":
        return

    cursor = connection.cursor()

    # Check what tables exist
    cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name IN ('machine_installedbinary', 'machine_binary')")
    existing_tables = {row[0] for row in cursor.fetchall()}

    # Drop old Binary table if it exists (0.8.6rc0 path)
    if "machine_installedbinary" in existing_tables:
        print("    - Removing old machine_installedbinary table...")
        cursor.execute("DROP TABLE IF EXISTS machine_installedbinary")

    # Create Binary table if it doesn't exist.
    # This handles the case where 0.8.6rc0's 0001_initial didn't create it.
    if "machine_binary" not in existing_tables:
        print("    - Creating machine_binary table...")
        cursor.execute("""
            CREATE TABLE machine_binary (
                id TEXT PRIMARY KEY NOT NULL,
                created_at DATETIME NOT NULL,
                modified_at DATETIME NOT NULL,
                num_uses_succeeded INTEGER NOT NULL DEFAULT 0,
                num_uses_failed INTEGER NOT NULL DEFAULT 0,
                machine_id TEXT NOT NULL REFERENCES machine_machine(id) ON DELETE CASCADE,
                name VARCHAR(63) NOT NULL,
                binproviders VARCHAR(255) NOT NULL DEFAULT 'env',
                overrides TEXT NOT NULL DEFAULT '{}',
                binprovider VARCHAR(63) NOT NULL DEFAULT 'env',
                abspath VARCHAR(255) NOT NULL,
                version VARCHAR(128) NOT NULL,
                sha256 VARCHAR(64) NOT NULL DEFAULT '',
                status VARCHAR(16) NOT NULL DEFAULT 'succeeded',
                retry_at DATETIME NULL,
                output_dir VARCHAR(255) NOT NULL DEFAULT ''
            )
        """)

        # Create indexes
        cursor.execute("CREATE INDEX machine_binary_machine_id_idx ON machine_binary(machine_id)")
        cursor.execute("CREATE INDEX machine_binary_name_idx ON machine_binary(name)")
        cursor.execute("CREATE INDEX machine_binary_abspath_idx ON machine_binary(abspath)")

        print("    ✓ machine_binary table ready")
    else:
        print("    - Converging existing machine_binary table...")
        cursor.execute("PRAGMA table_info(machine_binary)")
        binary_cols = {row[1] for row in cursor.fetchall()}

        # Old 0.8.x data dirs already have machine_binary, but with the
        # pre-abxpkg shape. Converge it here before later migrations and
        # runtime code expect Binary.binproviders / Binary.status to exist.
        if "binproviders" not in binary_cols:
            cursor.execute("ALTER TABLE machine_binary ADD COLUMN binproviders VARCHAR(255) NOT NULL DEFAULT 'env'")
        if "overrides" not in binary_cols:
            cursor.execute("ALTER TABLE machine_binary ADD COLUMN overrides TEXT NOT NULL DEFAULT '{}'")
        if "status" not in binary_cols:
            cursor.execute("ALTER TABLE machine_binary ADD COLUMN status VARCHAR(16) NOT NULL DEFAULT 'installed'")
        if "retry_at" not in binary_cols:
            cursor.execute("ALTER TABLE machine_binary ADD COLUMN retry_at DATETIME NULL")
        if "output_dir" not in binary_cols:
            cursor.execute("ALTER TABLE machine_binary ADD COLUMN output_dir VARCHAR(255) NOT NULL DEFAULT ''")

        cursor.execute(
            "UPDATE machine_binary SET binproviders = COALESCE(NULLIF(binproviders, ''), COALESCE(NULLIF(binprovider, ''), 'env'))",
        )
        cursor.execute("UPDATE machine_binary SET overrides = COALESCE(NULLIF(overrides, ''), '{}')")
        cursor.execute("UPDATE machine_binary SET status = COALESCE(NULLIF(status, ''), 'installed')")
        print("    ✓ machine_binary table ready")


class Migration(migrations.Migration):
    dependencies = [
        ("machine", "0001_initial"),
    ]

    operations = [
        migrations.RunPython(
            converge_binary_table,
            reverse_code=migrations.RunPython.noop,
        ),
    ]