import os

from fastapi.testclient import TestClient

os.environ.setdefault("DODO_DATABASE_URL", "sqlite+aiosqlite:////tmp/dodo-health-test.db")
os.environ.setdefault("DODO_AUTO_CREATE_SCHEMA", "true")

from backend.main import app


def test_health_live():
    with TestClient(app) as client:
        response = client.get("/health/live")
    assert response.status_code == 200
    assert response.json() == {"status": "ok"}


def test_setup_status_starts_uninitialized(client):
    response = client.get("/api/v1/setup/status")
    assert response.status_code == 200
    assert response.json() == {"initialized": False}


def test_initialize_login_and_create_task(client):
    initialized = client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    assert initialized.status_code == 201
    assert initialized.json()["username"] == "owner"
    assert "dodo_session" in initialized.cookies

    folder = client.post("/api/v1/folders", json={"name": "工作"})
    assert folder.status_code == 201

    task_list = client.post(
        "/api/v1/lists", json={"name": "本周", "folder_id": folder.json()["id"]}
    )
    assert task_list.status_code == 201

    task = client.post(
        "/api/v1/tasks",
        json={"title": "完成 dodo 第一阶段", "list_id": task_list.json()["id"], "priority": 3},
    )
    assert task.status_code == 201
    assert task.json()["title"] == "完成 dodo 第一阶段"

    tasks = client.get("/api/v1/tasks")
    assert tasks.status_code == 200
    assert len(tasks.json()["items"]) == 1


def test_initialize_is_closed_after_first_user(client):
    payload = {"username": "owner", "password": "correct horse battery staple"}
    assert client.post("/api/v1/setup/initialize", json=payload).status_code == 201
    response = client.post("/api/v1/setup/initialize", json=payload)
    assert response.status_code == 409


def test_unauthenticated_task_access_is_rejected(client):
    response = client.get("/api/v1/tasks")
    assert response.status_code == 401


def test_task_can_be_updated_completed_and_soft_deleted(client):
    client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    inbox = client.get("/api/v1/lists").json()[0]
    task = client.post(
        "/api/v1/tasks", json={"title": "旧标题", "list_id": inbox["id"]}
    ).json()

    updated = client.patch(
        f"/api/v1/tasks/{task['id']}",
        json={"title": "新标题", "completed": True, "version": task["version"]},
    )
    assert updated.status_code == 200
    assert updated.json()["title"] == "新标题"
    assert updated.json()["completed"] is True
    assert updated.json()["version"] == 2

    conflict = client.patch(
        f"/api/v1/tasks/{task['id']}",
        json={"title": "冲突标题", "version": task["version"]},
    )
    assert conflict.status_code == 409

    deleted = client.delete(f"/api/v1/tasks/{task['id']}")
    assert deleted.status_code == 204
    assert client.get("/api/v1/tasks").json()["items"] == []


def test_task_update_rejects_null_title(client):
    client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    inbox = client.get("/api/v1/lists").json()[0]
    task = client.post("/api/v1/tasks", json={"title": "任务", "list_id": inbox["id"]}).json()
    response = client.patch(
        f"/api/v1/tasks/{task['id']}", json={"title": None, "version": task["version"]}
    )
    assert response.status_code == 422


def test_subtask_parent_must_belong_to_same_user_and_list(client):
    client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    inbox = client.get("/api/v1/lists").json()[0]
    other = client.post("/api/v1/lists", json={"name": "其他"}).json()
    parent = client.post("/api/v1/tasks", json={"title": "父任务", "list_id": inbox["id"]}).json()
    response = client.post(
        "/api/v1/tasks",
        json={"title": "子任务", "list_id": other["id"], "parent_id": parent["id"]},
    )
    assert response.status_code == 400


def test_logout_revokes_current_session(client):
    client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    assert client.get("/api/v1/me").status_code == 200
    assert client.post("/api/v1/auth/logout").status_code == 204
    assert client.get("/api/v1/me").status_code == 401


def initialized_client(client):
    client.post(
        "/api/v1/setup/initialize",
        json={"username": "owner", "password": "correct horse battery staple"},
    )
    return client


def test_folder_and_list_lifecycle(client):
    client = initialized_client(client)
    folder = client.post("/api/v1/folders", json={"name": "工作"}).json()
    renamed = client.patch(f"/api/v1/folders/{folder['id']}", json={"name": "生活"})
    assert renamed.status_code == 200
    assert renamed.json()["name"] == "生活"

    task_list = client.post(
        "/api/v1/lists", json={"name": "采购", "folder_id": folder["id"]}
    ).json()
    renamed_list = client.patch(f"/api/v1/lists/{task_list['id']}", json={"name": "购物"})
    assert renamed_list.status_code == 200
    assert renamed_list.json()["name"] == "购物"
    assert client.delete(f"/api/v1/lists/{task_list['id']}").status_code == 204
    assert client.delete(f"/api/v1/folders/{folder['id']}").status_code == 204


def test_task_search_tags_subtasks_and_recycle_bin(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    tag = client.post("/api/v1/tags", json={"name": "重要", "color": "#f15a29"}).json()
    parent = client.post(
        "/api/v1/tasks",
        json={"title": "购买咖啡豆", "description": "手冲用", "list_id": inbox["id"], "tag_ids": [tag["id"]]},
    ).json()
    child = client.post(
        "/api/v1/tasks",
        json={"title": "比较价格", "list_id": inbox["id"], "parent_id": parent["id"]},
    )
    assert child.status_code == 201
    detail = client.get(f"/api/v1/tasks/{parent['id']}")
    assert detail.status_code == 200
    assert detail.json()["tags"][0]["name"] == "重要"
    assert len(detail.json()["subtasks"]) == 1
    assert len(client.get("/api/v1/tasks", params={"q": "咖啡"}).json()["items"]) == 1

    assert client.delete(f"/api/v1/tasks/{parent['id']}").status_code == 204
    trash = client.get("/api/v1/trash").json()["items"]
    assert len(trash) == 1
    assert client.post(f"/api/v1/tasks/{parent['id']}/restore").status_code == 200


def test_batch_complete_and_move(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    other = client.post("/api/v1/lists", json={"name": "稍后"}).json()
    ids = [
        client.post("/api/v1/tasks", json={"title": f"任务{i}", "list_id": inbox["id"]}).json()["id"]
        for i in range(2)
    ]
    response = client.post(
        "/api/v1/tasks/batch", json={"task_ids": ids, "completed": True, "list_id": other["id"]}
    )
    assert response.status_code == 200
    assert response.json()["updated"] == 2
    rows = client.get("/api/v1/tasks").json()["items"]
    assert all(row["completed"] and row["list_id"] == other["id"] for row in rows)


def test_inbox_is_protected_and_deleted_collections_are_hidden(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    assert client.patch(f"/api/v1/lists/{inbox['id']}", json={"name": "x"}).status_code == 409
    assert client.delete(f"/api/v1/lists/{inbox['id']}").status_code == 409

    folder = client.post("/api/v1/folders", json={"name": "项目"}).json()
    task_list = client.post(
        "/api/v1/lists", json={"name": "待办", "folder_id": folder["id"]}
    ).json()
    task = client.post(
        "/api/v1/tasks", json={"title": "保留任务", "list_id": task_list["id"]}
    ).json()
    assert client.delete(f"/api/v1/lists/{task_list['id']}").status_code == 204
    assert all(row["id"] != task_list["id"] for row in client.get("/api/v1/lists").json())
    archived = client.get("/api/v1/lists", params={"archived": True})
    assert archived.status_code == 200
    assert [row["id"] for row in archived.json()] == [task_list["id"]]
    assert client.post(f"/api/v1/lists/{task_list['id']}/restore").status_code == 200
    assert any(row["id"] == task_list["id"] for row in client.get("/api/v1/lists").json())
    moved = client.get(f"/api/v1/tasks/{task['id']}").json()
    assert moved["list_id"] == inbox["id"]
    assert client.delete(f"/api/v1/folders/{folder['id']}").status_code == 204
    assert client.get("/api/v1/folders").json() == []


def test_nested_subtasks_are_rejected(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    parent = client.post("/api/v1/tasks", json={"title": "父", "list_id": inbox["id"]}).json()
    child = client.post(
        "/api/v1/tasks",
        json={"title": "子", "list_id": inbox["id"], "parent_id": parent["id"]},
    ).json()
    nested = client.post(
        "/api/v1/tasks",
        json={"title": "孙", "list_id": inbox["id"], "parent_id": child["id"]},
    )
    assert nested.status_code == 400


def test_tags_are_global_searchable_and_validated(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    errands = client.post("/api/v1/lists", json={"name": "跑腿清单"}).json()
    tag = client.post("/api/v1/tags", json={"name": "蓝色标签", "color": "#123abc"})
    assert tag.status_code == 201
    assert client.get("/api/v1/tags").json()[0]["color"] == "#123abc"
    task = client.post(
        "/api/v1/tasks",
        json={"title": "普通标题", "description": "特殊说明", "list_id": errands["id"], "tag_ids": [tag.json()["id"]]},
    ).json()
    for query in ("普通", "特殊", "蓝色", "跑腿"):
        assert [row["id"] for row in client.get("/api/v1/tasks", params={"q": query}).json()["items"]] == [task["id"]]
    invalid = client.post(
        "/api/v1/tasks",
        json={"title": "非法标签", "list_id": inbox["id"], "tag_ids": ["00000000-0000-0000-0000-000000000001"]},
    )
    assert invalid.status_code == 404


def test_recycle_bin_restore_and_permanent_delete_include_subtasks(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    parent = client.post("/api/v1/tasks", json={"title": "父", "list_id": inbox["id"]}).json()
    client.post(
        "/api/v1/tasks",
        json={"title": "子", "list_id": inbox["id"], "parent_id": parent["id"]},
    )
    client.delete(f"/api/v1/tasks/{parent['id']}")
    assert len(client.get("/api/v1/trash").json()["items"]) == 1
    restored = client.post(f"/api/v1/tasks/{parent['id']}/restore")
    assert restored.status_code == 200
    assert len(client.get(f"/api/v1/tasks/{parent['id']}").json()["subtasks"]) == 1
    client.delete(f"/api/v1/tasks/{parent['id']}")
    assert client.delete(f"/api/v1/trash/{parent['id']}").status_code == 204
    assert client.post(f"/api/v1/tasks/{parent['id']}/restore").status_code == 404


def test_batch_supports_due_date_tags_and_soft_delete_atomically(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    tag = client.post("/api/v1/tags", json={"name": "批量", "color": "red"}).json()
    ids = [
        client.post("/api/v1/tasks", json={"title": str(i), "list_id": inbox["id"]}).json()["id"]
        for i in range(2)
    ]
    due_at = "2026-09-10T08:00:00+08:00"
    response = client.post(
        "/api/v1/tasks/batch",
        json={"task_ids": ids, "due_at": due_at, "tag_ids": [tag["id"]]},
    )
    assert response.status_code == 200 and response.json()["updated"] == 2
    assert all(client.get(f"/api/v1/tasks/{task_id}").json()["tags"] for task_id in ids)

    parent = client.post("/api/v1/tasks", json={"title": "父", "list_id": inbox["id"]}).json()
    client.post(
        "/api/v1/tasks",
        json={"title": "子", "list_id": inbox["id"], "parent_id": parent["id"]},
    )
    other = client.post("/api/v1/lists", json={"name": "批量目标"}).json()
    assert client.post(
        "/api/v1/tasks/batch", json={"task_ids": [parent["id"]], "list_id": other["id"]}
    ).status_code == 200
    moved = client.get(f"/api/v1/tasks/{parent['id']}").json()
    assert moved["subtasks"][0]["list_id"] == other["id"]

    failed = client.post(
        "/api/v1/tasks/batch",
        json={"task_ids": [ids[0], "00000000-0000-0000-0000-000000000001"], "completed": True},
    )
    assert failed.status_code == 404
    assert client.get(f"/api/v1/tasks/{ids[0]}").json()["completed"] is False
    assert client.post("/api/v1/tasks/batch", json={"task_ids": ids, "soft_delete": True}).status_code == 200
    assert len(client.get("/api/v1/trash").json()["items"]) == 2


def test_cursor_pagination_is_stable_and_rejects_bad_cursor(client):
    client = initialized_client(client)
    inbox = client.get("/api/v1/lists").json()[0]
    for i in range(5):
        client.post("/api/v1/tasks", json={"title": f"任务{i}", "list_id": inbox["id"]})
    first = client.get("/api/v1/tasks", params={"limit": 2}).json()
    second = client.get(
        "/api/v1/tasks", params={"limit": 2, "cursor": first["next_cursor"]}
    ).json()
    third = client.get(
        "/api/v1/tasks", params={"limit": 2, "cursor": second["next_cursor"]}
    ).json()
    ids = [row["id"] for page in (first, second, third) for row in page["items"]]
    assert len(ids) == len(set(ids)) == 5
    assert third["next_cursor"] is None
    assert client.get("/api/v1/tasks", params={"cursor": "broken"}).status_code == 422