"""v20 adds source_query column to table_registry.

Backs query_mode='materialized' for BigQuery: admin registers a SQL body
that the scheduler runs through the DuckDB BQ extension and writes as a
parquet to /data/extracts/bigquery/data/<id>.parquet.

The v19 step (#150) drops dataset_permissions, access_requests tables and
users.role, table_registry.is_public columns; v20 then ALTERs the post-v19
table_registry to add the source_query column.
"""
import duckdb

from src.db import SCHEMA_VERSION, _ensure_schema, get_schema_version


def test_schema_version_is_36():
    # v27 → v28: explicit-install (Model B) for curated marketplace plugins.
    # user_plugin_optouts row presence flips meaning from "excluded" to
    # "subscribed"; migration wipes existing rows so the inverted reading
    # starts from a clean baseline. Also adds marketplace_plugins.created_at
    # (per-plugin "newest first" sort on /marketplace), backfilled from
    # parent marketplace_registry.registered_at.
    # v28 → v29: /home page rollout — instance_templates singleton
    # consolidation (welcome_template + claude_md_template merged) + new
    # users.onboarded column. See tests/test_v29_home_migration.py for
    # the exhaustive coverage of that step.
    # v29 → v30: news_template — single versioned table for the /home
    # news perex + /news permalink page. See
    # tests/test_news_template_repository.py.
    # v30 → v31: session-pipeline framework — session_processor_state
    #            replaces session_extraction_state with composite PK.
    # v31 → v32 (this PR): flea-market upload guardrails — adds
    #            store_entities.visibility_status + creates store_submissions.
    # v32 → v33 (this PR): forensic columns on store_submissions —
    #            file_size, bundle_sha256, bundle_purged_at. Underpins the
    #            persist-blocked-bundle behavior so admins can Rescan /
    #            Override / Download; 30-day TTL purge clears bytes while
    #            keeping the row + sha intact. See docs/STORE_GUARDRAILS.md.
    # v33 → v34: drop store_submissions.retry_count — counter mixed LLM
    #            error count + admin rescan count, redundant with audit_log.
    # v34 → v35 (this PR): store_entities gains 'archived' visibility
    #            state + archived_at + archived_by audit columns. Owner
    #            soft-delete writes 'archived'; existing user_store_installs
    #            keep serving the bundle through marketplace.zip / .git.
    #            Hard delete (DELETE ?hard=true) remains admin-only.
    # v35 → v36 (PR #233 follow-up): re-apply NOT NULL + DEFAULT 'pending'
    #            on store_entities.visibility_status. Lost in the v34→v35
    #            column rebuild. Without this, an INSERT that omits the
    #            column lands NULL → repo reads None → undefined behavior
    #            in the visibility gates. Value-list invariant remains
    #            enforced application-side (DuckDB ADD CHECK on existing
    #            column not supported).
    assert SCHEMA_VERSION == 36


def test_v20_adds_source_query(tmp_path):
    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    _ensure_schema(conn)

    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'table_registry'"
        ).fetchall()
    }
    assert "source_query" in cols, f"source_query missing from {cols}"
    assert get_schema_version(conn) == SCHEMA_VERSION
    conn.close()


def test_claude_md_template_seeded_in_instance_templates(tmp_path):
    """v23 introduced claude_md_template as a singleton table; v28 consolidates
    it into instance_templates keyed 'claude_md'. Post-v28 the legacy table is
    dropped — the canonical lookup is `instance_templates WHERE key='claude_md'`.

    See tests/test_v28_migration.py for the migration path coverage. This test
    just verifies the seeded row is present on a fresh install.
    """
    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    _ensure_schema(conn)

    tables = {
        r[0] for r in conn.execute(
            "SELECT table_name FROM information_schema.tables "
            "WHERE table_schema = 'main'"
        ).fetchall()
    }
    assert "instance_templates" in tables
    assert "claude_md_template" not in tables, (
        "claude_md_template should be consolidated away post-v28"
    )

    row = conn.execute(
        "SELECT key, content FROM instance_templates WHERE key = 'claude_md'"
    ).fetchone()
    assert row is not None
    assert row[0] == "claude_md"
    assert row[1] is None  # default = no override
    conn.close()


def test_v19_db_migrates_to_v20(tmp_path):
    """Pre-existing v19 DB (post-RBAC-drop) without source_query upgrades
    cleanly without losing data."""
    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))

    # Simulate a v19 DB at minimal but realistic shape: schema_version row +
    # a table_registry row in the post-v19 column shape (no is_public column,
    # since v19 finalize dropped it via the table-rebuild idiom).
    conn.execute(
        "CREATE TABLE schema_version (version INTEGER, "
        "applied_at TIMESTAMP DEFAULT current_timestamp)"
    )
    conn.execute("INSERT INTO schema_version (version) VALUES (19)")
    conn.execute("""CREATE TABLE table_registry (
        id VARCHAR PRIMARY KEY, name VARCHAR NOT NULL,
        source_type VARCHAR, bucket VARCHAR, source_table VARCHAR,
        sync_strategy VARCHAR DEFAULT 'full_refresh',
        query_mode VARCHAR DEFAULT 'local',
        sync_schedule VARCHAR, profile_after_sync BOOLEAN DEFAULT true,
        primary_key VARCHAR, folder VARCHAR, description TEXT,
        registered_by VARCHAR,
        registered_at TIMESTAMP DEFAULT current_timestamp
    )""")
    conn.execute("INSERT INTO table_registry (id, name) VALUES ('foo', 'foo')")

    _ensure_schema(conn)

    assert get_schema_version(conn) == SCHEMA_VERSION  # bumped 19→28 forward
    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'table_registry'"
        ).fetchall()
    }
    assert "source_query" in cols
    # Existing row preserved, new column NULL
    row = conn.execute(
        "SELECT id, source_query FROM table_registry WHERE id='foo'"
    ).fetchone()
    assert row == ("foo", None)
    conn.close()


def _make_v34_store_entities(conn):
    """Build a minimal v34-shape store_entities table for v34→v35 path tests.

    Only includes the columns the v34→v35 migration touches; the rest of
    the schema isn't needed because the function operates only on
    store_entities's column set.
    """
    conn.execute("""
        CREATE TABLE store_entities (
            id VARCHAR PRIMARY KEY,
            visibility_status VARCHAR DEFAULT 'pending'
        )
    """)
    conn.execute(
        "INSERT INTO store_entities (id, visibility_status) VALUES "
        "('a', 'approved'), ('b', 'pending'), ('c', 'hidden')"
    )


def test_v34_to_v35_clean_path_rebuilds_visibility_column(tmp_path):
    """Standard v34 → v35 path: ``visibility_status`` is present, no temp
    column. Migration rebuilds the column without the legacy CHECK so
    'archived' becomes a valid value, preserves all row values, and adds
    the audit columns.
    """
    from src.db import _v34_to_v35_migrate

    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    _make_v34_store_entities(conn)

    _v34_to_v35_migrate(conn)

    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'store_entities'"
        ).fetchall()
    }
    assert "visibility_status" in cols
    assert "_vis_v35" not in cols, "temp column must be cleaned up"
    assert "archived_at" in cols
    assert "archived_by" in cols

    rows = dict(conn.execute(
        "SELECT id, visibility_status FROM store_entities ORDER BY id"
    ).fetchall())
    assert rows == {"a": "approved", "b": "pending", "c": "hidden"}, (
        f"row values must survive the rebuild: {rows}"
    )
    conn.close()


def test_v34_to_v35_recovers_from_partial_rebuild_missing_visibility(tmp_path):
    """Partial-rebuild recovery: a previous migration attempt completed
    steps 3-5 (added _vis_v35, copied values, dropped visibility_status)
    but failed before step 6 (RENAME). Subsequent restarts hit
    DROP visibility_status (no IF EXISTS guard) and looped on the same
    error, leaving the DB stranded with schema_version stuck pre-v35.

    The new code detects this state — _vis_v35 present, visibility_status
    absent — and finishes the rebuild with the RENAME alone instead of
    re-running the full destructive sequence.
    """
    from src.db import _v34_to_v35_migrate

    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    # Hand-build the broken state: store_entities with _vis_v35 instead of
    # visibility_status, populated with the canonical values.
    conn.execute("""
        CREATE TABLE store_entities (
            id VARCHAR PRIMARY KEY,
            _vis_v35 VARCHAR
        )
    """)
    conn.execute(
        "INSERT INTO store_entities (id, _vis_v35) VALUES "
        "('a', 'approved'), ('b', 'pending'), ('c', 'hidden')"
    )

    _v34_to_v35_migrate(conn)

    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'store_entities'"
        ).fetchall()
    }
    assert "visibility_status" in cols
    assert "_vis_v35" not in cols
    assert "archived_at" in cols
    assert "archived_by" in cols

    rows = dict(conn.execute(
        "SELECT id, visibility_status FROM store_entities ORDER BY id"
    ).fetchall())
    assert rows == {"a": "approved", "b": "pending", "c": "hidden"}, (
        f"row values must come back via RENAME, not be lost: {rows}"
    )
    conn.close()


def test_v34_to_v35_recovers_from_partial_rebuild_both_columns(tmp_path):
    """Edge state: a prior attempt aborted before the DROP, leaving both
    visibility_status (canonical) and _vis_v35 (temp) on the table.
    The recovery path drops _vis_v35 and keeps visibility_status — the
    rest of the schema expects that name.
    """
    from src.db import _v34_to_v35_migrate

    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    conn.execute("""
        CREATE TABLE store_entities (
            id VARCHAR PRIMARY KEY,
            visibility_status VARCHAR,
            _vis_v35 VARCHAR
        )
    """)
    conn.execute(
        "INSERT INTO store_entities (id, visibility_status, _vis_v35) VALUES "
        "('a', 'approved', 'approved')"
    )

    _v34_to_v35_migrate(conn)

    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'store_entities'"
        ).fetchall()
    }
    assert "visibility_status" in cols
    assert "_vis_v35" not in cols, "temp column must be dropped"

    row = conn.execute(
        "SELECT id, visibility_status FROM store_entities WHERE id = 'a'"
    ).fetchone()
    assert row == ("a", "approved")
    conn.close()


def test_v32_db_with_partial_v35_recovers_through_full_ladder(tmp_path):
    """End-to-end: a DB stranded at schema_version=32 with the half-applied
    v34→v35 state (visibility_status dropped, _vis_v35 left behind) must
    upgrade cleanly through the full ladder when ``_ensure_schema`` runs.

    This is the production scenario observed in operator instances after
    the original list-form ``_V34_TO_V35_MIGRATIONS`` failed mid-run on
    a fresh restart.
    """
    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))

    # Stand up the broken state. We only need enough of the schema for the
    # migration ladder to run — ``_ensure_schema`` will create the rest
    # via ``_SYSTEM_SCHEMA``'s IF NOT EXISTS guards.
    conn.execute(
        "CREATE TABLE schema_version (version INTEGER, "
        "applied_at TIMESTAMP DEFAULT current_timestamp)"
    )
    conn.execute("INSERT INTO schema_version (version) VALUES (32)")
    conn.execute("""
        CREATE TABLE store_entities (
            id VARCHAR PRIMARY KEY,
            owner_user_id VARCHAR,
            owner_username VARCHAR,
            type VARCHAR,
            name VARCHAR,
            archived_at TIMESTAMP,
            archived_by VARCHAR,
            _vis_v35 VARCHAR
        )
    """)
    conn.execute(
        "INSERT INTO store_entities (id, type, name, _vis_v35) "
        "VALUES ('a', 'skill', 'alpha', 'approved')"
    )

    _ensure_schema(conn)

    assert get_schema_version(conn) == SCHEMA_VERSION
    cols = {
        r[0] for r in conn.execute(
            "SELECT column_name FROM information_schema.columns "
            "WHERE table_name = 'store_entities'"
        ).fetchall()
    }
    assert "visibility_status" in cols
    assert "_vis_v35" not in cols
    # Existing row preserved, value carried over from _vis_v35.
    row = conn.execute(
        "SELECT id, visibility_status FROM store_entities WHERE id = 'a'"
    ).fetchone()
    assert row == ("a", "approved")
    conn.close()


def test_v35_to_v36_reapplies_visibility_constraints(tmp_path):
    """v34→v35 dropped NOT NULL + DEFAULT when rebuilding the column to
    drop the legacy CHECK; v35→v36 re-applies them. Verifies that on a
    freshly migrated DB, an INSERT omitting visibility_status either
    inherits the default 'pending' or fails — never lands NULL.
    """
    db_path = tmp_path / "system.duckdb"
    conn = duckdb.connect(str(db_path))
    _ensure_schema(conn)
    assert get_schema_version(conn) == SCHEMA_VERSION

    cols = conn.execute(
        "SELECT column_name, is_nullable, column_default "
        "FROM information_schema.columns "
        "WHERE table_name = 'store_entities' "
        "  AND column_name = 'visibility_status'"
    ).fetchall()
    assert cols, "visibility_status column missing from store_entities"
    name, is_nullable, default_expr = cols[0]
    assert is_nullable == "NO", (
        f"visibility_status must be NOT NULL after v36; got is_nullable={is_nullable!r}"
    )
    # DuckDB renders the default as a quoted literal — match either form.
    assert default_expr is not None, "visibility_status DEFAULT must be set"
    assert "pending" in str(default_expr).lower(), (
        f"visibility_status DEFAULT must be 'pending'; got {default_expr!r}"
    )

    conn.close()