"""Integration tests for the evolution card state API endpoints (WP-07).

Tests cover:
  GET /api/v2/teams/{team_id}/evolutions
  GET /api/v2/evolution/cards/{card_id}

All tests require a live PostgreSQL connection (POSTGRES_HOST env var) and
assume the evolution schema migration (WP-04) has already been applied.
Tests auto-skip when POSTGRES_HOST is not set.

Test data is inserted via psycopg2 before each module fixture runs and
cleaned up in teardown so the tests are repeatable.  ON CONFLICT / CASCADE
clauses keep the table clean even if a previous run did not complete teardown.

Object graph built by fixtures
-------------------------------
  rarity_row        -- a seeded rarity row
  cardset_row       -- a seeded cardset row
  player_row        -- a seeded player row (FK: rarity, cardset)
  team_row          -- a seeded team row
  track_row         -- a seeded evolution_track row (batter)
  card_row          -- a seeded card row (FK: player, team, pack, pack_type, cardset)
  state_row         -- a seeded evolution_card_state row (FK: player, team, track)

Test matrix
-----------
  test_list_team_evolutions           -- baseline: returns count + items for a team
  test_list_filter_by_card_type       -- card_type query param filters by track.card_type
  test_list_filter_by_tier            -- tier query param filters by current_tier
  test_list_pagination                -- page/per_page params slice results correctly
  test_get_card_state_shape           -- single card returns all required response fields
  test_get_card_state_next_threshold  -- next_threshold is the threshold for tier above current
  test_get_card_id_resolves_player    -- card_id joins Card -> Player/Team -> EvolutionCardState
  test_get_card_404_no_state          -- card with no EvolutionCardState returns 404
  test_duplicate_cards_share_state    -- two cards same player+team return the same state row
  test_auth_required                  -- missing token returns 401 on both endpoints
"""

import os

import pytest
from fastapi.testclient import TestClient

POSTGRES_HOST = os.environ.get("POSTGRES_HOST")
_skip_no_pg = pytest.mark.skipif(
    not POSTGRES_HOST, reason="POSTGRES_HOST not set — integration tests skipped"
)

AUTH_HEADER = {"Authorization": f"Bearer {os.environ.get('API_TOKEN', 'test-token')}"}

# ---------------------------------------------------------------------------
# Shared fixtures: seed and clean up the full object graph
# ---------------------------------------------------------------------------


@pytest.fixture(scope="module")
def seeded_data(pg_conn):
    """Insert all rows needed for state API tests; delete them after the module.

    Returns a dict with the integer IDs of every inserted row so individual
    test functions can reference them by key.

    Insertion order respects FK dependencies:
      rarity -> cardset -> player
      pack_type (needs cardset) -> pack (needs team + pack_type) -> card
      evolution_track -> evolution_card_state
    """
    cur = pg_conn.cursor()

    # Rarity
    cur.execute(
        """
        INSERT INTO rarity (value, name, color)
        VALUES (99, 'WP07TestRarity', '#123456')
        ON CONFLICT (name) DO UPDATE SET value = EXCLUDED.value
        RETURNING id
        """
    )
    rarity_id = cur.fetchone()[0]

    # Cardset
    cur.execute(
        """
        INSERT INTO cardset (name, description, total_cards)
        VALUES ('WP07 Test Set', 'evo state api tests', 1)
        ON CONFLICT (name) DO UPDATE SET description = EXCLUDED.description
        RETURNING id
        """
    )
    cardset_id = cur.fetchone()[0]

    # Player 1 (batter)
    cur.execute(
        """
        INSERT INTO player (p_name, rarity_id, cardset_id, set_num, pos_1,
                            image, mlbclub, franchise, description)
        VALUES ('WP07 Batter', %s, %s, 901, '1B',
                'https://example.com/wp07_b.png', 'TST', 'TST', 'wp07 test batter')
        RETURNING player_id
        """,
        (rarity_id, cardset_id),
    )
    player_id = cur.fetchone()[0]

    # Player 2 (sp) for cross-card_type filter test
    cur.execute(
        """
        INSERT INTO player (p_name, rarity_id, cardset_id, set_num, pos_1,
                            image, mlbclub, franchise, description)
        VALUES ('WP07 Pitcher', %s, %s, 902, 'SP',
                'https://example.com/wp07_p.png', 'TST', 'TST', 'wp07 test pitcher')
        RETURNING player_id
        """,
        (rarity_id, cardset_id),
    )
    player2_id = cur.fetchone()[0]

    # Team
    cur.execute(
        """
        INSERT INTO team (abbrev, sname, lname, gmid, gmname, gsheet,
                          wallet, team_value, collection_value, season, is_ai)
        VALUES ('WP7', 'WP07', 'WP07 Test Team', 700000001, 'wp07user',
                'https://docs.google.com/wp07', 0, 0, 0, 11, false)
        RETURNING id
        """
    )
    team_id = cur.fetchone()[0]

    # Evolution tracks
    cur.execute(
        """
        INSERT INTO evolution_track (name, card_type, formula,
                                     t1_threshold, t2_threshold,
                                     t3_threshold, t4_threshold)
        VALUES ('WP07 Batter Track', 'batter', 'pa + tb * 2', 37, 149, 448, 896)
        ON CONFLICT (name) DO UPDATE SET card_type = EXCLUDED.card_type
        RETURNING id
        """
    )
    batter_track_id = cur.fetchone()[0]

    cur.execute(
        """
        INSERT INTO evolution_track (name, card_type, formula,
                                     t1_threshold, t2_threshold,
                                     t3_threshold, t4_threshold)
        VALUES ('WP07 SP Track', 'sp', 'ip + k', 10, 40, 120, 240)
        ON CONFLICT (name) DO UPDATE SET card_type = EXCLUDED.card_type
        RETURNING id
        """
    )
    sp_track_id = cur.fetchone()[0]

    # Pack type + pack (needed as FK parent for Card)
    cur.execute(
        """
        INSERT INTO pack_type (name, cost, card_count, cardset_id)
        VALUES ('WP07 Pack Type', 100, 5, %s)
        RETURNING id
        """,
        (cardset_id,),
    )
    pack_type_id = cur.fetchone()[0]

    cur.execute(
        """
        INSERT INTO pack (team_id, pack_type_id)
        VALUES (%s, %s)
        RETURNING id
        """,
        (team_id, pack_type_id),
    )
    pack_id = cur.fetchone()[0]

    # Card linking batter player to team
    cur.execute(
        """
        INSERT INTO card (player_id, team_id, pack_id, value)
        VALUES (%s, %s, %s, 0)
        RETURNING id
        """,
        (player_id, team_id, pack_id),
    )
    card_id = cur.fetchone()[0]

    # Second card for same player+team (shared-state test)
    cur.execute(
        """
        INSERT INTO pack (team_id, pack_type_id)
        VALUES (%s, %s)
        RETURNING id
        """,
        (team_id, pack_type_id),
    )
    pack2_id = cur.fetchone()[0]

    cur.execute(
        """
        INSERT INTO card (player_id, team_id, pack_id, value)
        VALUES (%s, %s, %s, 0)
        RETURNING id
        """,
        (player_id, team_id, pack2_id),
    )
    card2_id = cur.fetchone()[0]

    # Card with NO state (404 test)
    cur.execute(
        """
        INSERT INTO pack (team_id, pack_type_id)
        VALUES (%s, %s)
        RETURNING id
        """,
        (team_id, pack_type_id),
    )
    pack3_id = cur.fetchone()[0]

    cur.execute(
        """
        INSERT INTO card (player_id, team_id, pack_id, value)
        VALUES (%s, %s, %s, 0)
        RETURNING id
        """,
        (player2_id, team_id, pack3_id),
    )
    card_no_state_id = cur.fetchone()[0]

    # Evolution card states
    # Batter player at tier 1, value 87.5
    cur.execute(
        """
        INSERT INTO evolution_card_state
            (player_id, team_id, track_id, current_tier, current_value,
             fully_evolved, last_evaluated_at)
        VALUES (%s, %s, %s, 1, 87.5, false, '2026-03-12T14:00:00Z')
        RETURNING id
        """,
        (player_id, team_id, batter_track_id),
    )
    state_id = cur.fetchone()[0]

    pg_conn.commit()

    yield {
        "rarity_id": rarity_id,
        "cardset_id": cardset_id,
        "player_id": player_id,
        "player2_id": player2_id,
        "team_id": team_id,
        "batter_track_id": batter_track_id,
        "sp_track_id": sp_track_id,
        "pack_type_id": pack_type_id,
        "card_id": card_id,
        "card2_id": card2_id,
        "card_no_state_id": card_no_state_id,
        "state_id": state_id,
    }

    # Teardown: delete in reverse FK order
    cur.execute("DELETE FROM evolution_card_state WHERE id = %s", (state_id,))
    cur.execute(
        "DELETE FROM card WHERE id = ANY(%s)",
        ([card_id, card2_id, card_no_state_id],),
    )
    cur.execute("DELETE FROM pack WHERE id = ANY(%s)", ([pack_id, pack2_id, pack3_id],))
    cur.execute("DELETE FROM pack_type WHERE id = %s", (pack_type_id,))
    cur.execute(
        "DELETE FROM evolution_track WHERE id = ANY(%s)",
        ([batter_track_id, sp_track_id],),
    )
    cur.execute(
        "DELETE FROM player WHERE player_id = ANY(%s)", ([player_id, player2_id],)
    )
    cur.execute("DELETE FROM team WHERE id = %s", (team_id,))
    cur.execute("DELETE FROM cardset WHERE id = %s", (cardset_id,))
    cur.execute("DELETE FROM rarity WHERE id = %s", (rarity_id,))
    pg_conn.commit()


@pytest.fixture(scope="module")
def client():
    """FastAPI TestClient backed by the real PostgreSQL database."""
    from app.main import app

    with TestClient(app) as c:
        yield c


# ---------------------------------------------------------------------------
# Tests: GET /api/v2/teams/{team_id}/evolutions
# ---------------------------------------------------------------------------


@_skip_no_pg
def test_list_team_evolutions(client, seeded_data):
    """GET /teams/{id}/evolutions returns count=1 and one item for the seeded state.

    Verifies the basic list response shape: a dict with 'count' and 'items',
    and that the single item contains player_id, team_id, and current_tier.
    """
    team_id = seeded_data["team_id"]
    resp = client.get(f"/api/v2/teams/{team_id}/evolutions", headers=AUTH_HEADER)
    assert resp.status_code == 200
    data = resp.json()
    assert data["count"] == 1
    assert len(data["items"]) == 1
    item = data["items"][0]
    assert item["player_id"] == seeded_data["player_id"]
    assert item["team_id"] == team_id
    assert item["current_tier"] == 1


@_skip_no_pg
def test_list_filter_by_card_type(client, seeded_data, pg_conn):
    """card_type filter includes states whose track.card_type matches and excludes others.

    Seeds a second evolution_card_state for player2 (sp track) then queries
    card_type=batter (returns 1) and card_type=sp (returns 1).
    Verifies the JOIN to evolution_track and the WHERE predicate on card_type.
    """
    cur = pg_conn.cursor()
    # Add a state for the sp player so we have two types in this team
    cur.execute(
        """
        INSERT INTO evolution_card_state
            (player_id, team_id, track_id, current_tier, current_value, fully_evolved)
        VALUES (%s, %s, %s, 0, 0.0, false)
        RETURNING id
        """,
        (seeded_data["player2_id"], seeded_data["team_id"], seeded_data["sp_track_id"]),
    )
    sp_state_id = cur.fetchone()[0]
    pg_conn.commit()

    try:
        team_id = seeded_data["team_id"]

        resp_batter = client.get(
            f"/api/v2/teams/{team_id}/evolutions?card_type=batter", headers=AUTH_HEADER
        )
        assert resp_batter.status_code == 200
        batter_data = resp_batter.json()
        assert batter_data["count"] == 1
        assert batter_data["items"][0]["player_id"] == seeded_data["player_id"]

        resp_sp = client.get(
            f"/api/v2/teams/{team_id}/evolutions?card_type=sp", headers=AUTH_HEADER
        )
        assert resp_sp.status_code == 200
        sp_data = resp_sp.json()
        assert sp_data["count"] == 1
        assert sp_data["items"][0]["player_id"] == seeded_data["player2_id"]
    finally:
        cur.execute("DELETE FROM evolution_card_state WHERE id = %s", (sp_state_id,))
        pg_conn.commit()


@_skip_no_pg
def test_list_filter_by_tier(client, seeded_data, pg_conn):
    """tier filter includes only states at the specified current_tier.

    The base fixture has player1 at tier=1.  This test temporarily advances
    it to tier=2, then queries tier=1 (should return 0) and tier=2 (should
    return 1).  Restores to tier=1 after assertions.
    """
    cur = pg_conn.cursor()

    # Advance to tier 2
    cur.execute(
        "UPDATE evolution_card_state SET current_tier = 2 WHERE id = %s",
        (seeded_data["state_id"],),
    )
    pg_conn.commit()

    try:
        team_id = seeded_data["team_id"]

        resp_t1 = client.get(
            f"/api/v2/teams/{team_id}/evolutions?tier=1", headers=AUTH_HEADER
        )
        assert resp_t1.status_code == 200
        assert resp_t1.json()["count"] == 0

        resp_t2 = client.get(
            f"/api/v2/teams/{team_id}/evolutions?tier=2", headers=AUTH_HEADER
        )
        assert resp_t2.status_code == 200
        t2_data = resp_t2.json()
        assert t2_data["count"] == 1
        assert t2_data["items"][0]["current_tier"] == 2
    finally:
        cur.execute(
            "UPDATE evolution_card_state SET current_tier = 1 WHERE id = %s",
            (seeded_data["state_id"],),
        )
        pg_conn.commit()


@_skip_no_pg
def test_list_pagination(client, seeded_data, pg_conn):
    """page/per_page params slice the full result set correctly.

    Temporarily inserts a second state (for player2 on the same team) so
    the list has 2 items.  With per_page=1, page=1 returns item 1 and
    page=2 returns item 2; they must be different players.
    """
    cur = pg_conn.cursor()
    cur.execute(
        """
        INSERT INTO evolution_card_state
            (player_id, team_id, track_id, current_tier, current_value, fully_evolved)
        VALUES (%s, %s, %s, 0, 0.0, false)
        RETURNING id
        """,
        (
            seeded_data["player2_id"],
            seeded_data["team_id"],
            seeded_data["batter_track_id"],
        ),
    )
    extra_state_id = cur.fetchone()[0]
    pg_conn.commit()

    try:
        team_id = seeded_data["team_id"]

        resp1 = client.get(
            f"/api/v2/teams/{team_id}/evolutions?page=1&per_page=1", headers=AUTH_HEADER
        )
        assert resp1.status_code == 200
        data1 = resp1.json()
        assert len(data1["items"]) == 1

        resp2 = client.get(
            f"/api/v2/teams/{team_id}/evolutions?page=2&per_page=1", headers=AUTH_HEADER
        )
        assert resp2.status_code == 200
        data2 = resp2.json()
        assert len(data2["items"]) == 1

        assert data1["items"][0]["player_id"] != data2["items"][0]["player_id"]
    finally:
        cur.execute("DELETE FROM evolution_card_state WHERE id = %s", (extra_state_id,))
        pg_conn.commit()


# ---------------------------------------------------------------------------
# Tests: GET /api/v2/evolution/cards/{card_id}
# ---------------------------------------------------------------------------


@_skip_no_pg
def test_get_card_state_shape(client, seeded_data):
    """GET /evolution/cards/{card_id} returns all required fields.

    Verifies the full response envelope:
      player_id, team_id, current_tier, current_value, fully_evolved,
      last_evaluated_at, next_threshold, and a nested 'track' dict
      with id, name, card_type, formula, and t1-t4 thresholds.
    """
    card_id = seeded_data["card_id"]
    resp = client.get(f"/api/v2/evolution/cards/{card_id}", headers=AUTH_HEADER)
    assert resp.status_code == 200
    data = resp.json()

    assert data["player_id"] == seeded_data["player_id"]
    assert data["team_id"] == seeded_data["team_id"]
    assert data["current_tier"] == 1
    assert data["current_value"] == 87.5
    assert data["fully_evolved"] is False

    t = data["track"]
    assert t["id"] == seeded_data["batter_track_id"]
    assert t["name"] == "WP07 Batter Track"
    assert t["card_type"] == "batter"
    assert t["formula"] == "pa + tb * 2"
    assert t["t1_threshold"] == 37
    assert t["t2_threshold"] == 149
    assert t["t3_threshold"] == 448
    assert t["t4_threshold"] == 896

    # tier=1 -> next threshold is t2_threshold
    assert data["next_threshold"] == 149


@_skip_no_pg
def test_get_card_state_next_threshold(client, seeded_data, pg_conn):
    """next_threshold reflects the threshold for the tier immediately above current.

    Tier mapping:
      0 -> t1_threshold (37)
      1 -> t2_threshold (149)
      2 -> t3_threshold (448)
      3 -> t4_threshold (896)
      4 -> null (fully evolved)

    This test advances the state to tier=2, confirms next_threshold=448,
    then to tier=4 (fully_evolved=True) and confirms next_threshold=null.
    Restores original state after assertions.
    """
    cur = pg_conn.cursor()
    card_id = seeded_data["card_id"]
    state_id = seeded_data["state_id"]

    # Advance to tier 2
    cur.execute(
        "UPDATE evolution_card_state SET current_tier = 2 WHERE id = %s", (state_id,)
    )
    pg_conn.commit()

    try:
        resp = client.get(f"/api/v2/evolution/cards/{card_id}", headers=AUTH_HEADER)
        assert resp.status_code == 200
        assert resp.json()["next_threshold"] == 448  # t3_threshold

        # Advance to tier 4 (fully evolved)
        cur.execute(
            "UPDATE evolution_card_state SET current_tier = 4, fully_evolved = true "
            "WHERE id = %s",
            (state_id,),
        )
        pg_conn.commit()

        resp2 = client.get(f"/api/v2/evolution/cards/{card_id}", headers=AUTH_HEADER)
        assert resp2.status_code == 200
        assert resp2.json()["next_threshold"] is None
    finally:
        cur.execute(
            "UPDATE evolution_card_state SET current_tier = 1, fully_evolved = false "
            "WHERE id = %s",
            (state_id,),
        )
        pg_conn.commit()


@_skip_no_pg
def test_get_card_id_resolves_player(client, seeded_data):
    """card_id is resolved via the Card table to obtain (player_id, team_id).

    The endpoint must JOIN Card -> Player + Team to find the EvolutionCardState.
    Verifies that card_id correctly maps to the right player's evolution state.
    """
    card_id = seeded_data["card_id"]
    resp = client.get(f"/api/v2/evolution/cards/{card_id}", headers=AUTH_HEADER)
    assert resp.status_code == 200
    data = resp.json()
    assert data["player_id"] == seeded_data["player_id"]
    assert data["team_id"] == seeded_data["team_id"]


@_skip_no_pg
def test_get_card_404_no_state(client, seeded_data):
    """GET /evolution/cards/{card_id} returns 404 when no EvolutionCardState exists.

    card_no_state_id is a card row for player2 on the team, but no
    evolution_card_state row was created for player2.  The endpoint must
    return 404, not 500 or an empty response.
    """
    card_id = seeded_data["card_no_state_id"]
    resp = client.get(f"/api/v2/evolution/cards/{card_id}", headers=AUTH_HEADER)
    assert resp.status_code == 404


@_skip_no_pg
def test_duplicate_cards_share_state(client, seeded_data):
    """Two Card rows for the same player+team share one EvolutionCardState.

    card_id and card2_id both belong to player_id on team_id.  Because the
    unique-(player,team) constraint means only one state row can exist, both
    card IDs must resolve to the same state data.
    """
    card1_id = seeded_data["card_id"]
    card2_id = seeded_data["card2_id"]

    resp1 = client.get(f"/api/v2/evolution/cards/{card1_id}", headers=AUTH_HEADER)
    resp2 = client.get(f"/api/v2/evolution/cards/{card2_id}", headers=AUTH_HEADER)

    assert resp1.status_code == 200
    assert resp2.status_code == 200
    data1 = resp1.json()
    data2 = resp2.json()

    assert data1["player_id"] == data2["player_id"] == seeded_data["player_id"]
    assert data1["current_tier"] == data2["current_tier"] == 1
    assert data1["current_value"] == data2["current_value"] == 87.5


# ---------------------------------------------------------------------------
# Auth tests
# ---------------------------------------------------------------------------


@_skip_no_pg
def test_auth_required(client, seeded_data):
    """Both endpoints return 401 when no Bearer token is provided.

    Verifies that the valid_token dependency is enforced on:
      GET /api/v2/teams/{id}/evolutions
      GET /api/v2/evolution/cards/{id}
    """
    team_id = seeded_data["team_id"]
    card_id = seeded_data["card_id"]

    resp_list = client.get(f"/api/v2/teams/{team_id}/evolutions")
    assert resp_list.status_code == 401

    resp_card = client.get(f"/api/v2/evolution/cards/{card_id}")
    assert resp_card.status_code == 401