from __future__ import annotations

from typing import Iterator, List, Optional

from aiohttp import web
from pydantic import BaseModel, RootModel

from aiohttp_pydantic import PydanticView


class ArticleModel(BaseModel):
    name: str
    nb_page: Optional[int] = None


class ArticleModels(RootModel):
    root: List[ArticleModel]

    def __iter__(self) -> Iterator[ArticleModel]:
        return iter(self.root)


class ArticleView(PydanticView):
    async def post(self, article: ArticleModel):
        return web.json_response(article.dict())

    async def put(self, articles: ArticleModels):
        return web.json_response([article.dict() for article in articles])


async def test_post_an_article_without_required_field_should_return_an_error_message(
        aiohttp_client, event_loop
):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    resp = await client.post("/article", json={})
    assert resp.status == 400
    assert resp.content_type == "application/json"

    assert await resp.json() == [
        {
            'input': {},
            'loc': ['name'],
            'loc_in': 'body',
            'msg': 'Field required',
            'type': 'missing',
            'url': 'https://errors.pydantic.dev/2.3/v/missing'
        }
    ]


async def test_post_an_article_with_wrong_type_field_should_return_an_error_message(
        aiohttp_client, event_loop
):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    resp = await client.post("/article", json={"name": "foo", "nb_page": "foo"})
    assert resp.status == 400
    assert resp.content_type == "application/json"
    assert await resp.json() == [
        {
            'input': 'foo',
            'loc': ['nb_page'],
            'loc_in': 'body',
            'msg': 'Input should be a valid integer, unable to parse string as an integer',
            'type': 'int_parsing',
            'url': 'https://errors.pydantic.dev/2.3/v/int_parsing'
        }
    ]


async def test_post_an_array_json_is_supported(aiohttp_client, event_loop):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    body = [{"name": "foo", "nb_page": 3}] * 2
    resp = await client.put("/article", json=body)
    assert resp.status == 200
    assert resp.content_type == "application/json"
    assert await resp.json() == body


async def test_post_an_array_json_to_an_object_model_should_return_an_error(
        aiohttp_client, event_loop
):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    resp = await client.post("/article", json=[{"name": "foo", "nb_page": 3}])
    assert resp.status == 400
    assert resp.content_type == "application/json"
    assert await resp.json() == [
        {
            'loc': ['root'],
            'loc_in': 'body',
            'msg': 'value is not a valid dict',
            'type': 'type_error.dict'
        }
    ]


async def test_post_an_object_json_to_a_list_model_should_return_an_error(
        aiohttp_client, event_loop
):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    resp = await client.put("/article", json={"name": "foo", "nb_page": 3})
    assert resp.status == 400
    assert resp.content_type == "application/json"

    assert await resp.json() == [
        {
            'input': {'name': 'foo', 'nb_page': 3},
            'loc': [],
            'loc_in': 'body',
            'msg': 'Input should be a valid list',
            'type': 'list_type',
            'url': 'https://errors.pydantic.dev/2.3/v/list_type'
        }
    ]


async def test_post_a_valid_article_should_return_the_parsed_type(aiohttp_client, event_loop):
    app = web.Application()
    app.router.add_view("/article", ArticleView)

    client = await aiohttp_client(app)
    resp = await client.post("/article", json={"name": "foo", "nb_page": 3})
    assert resp.status == 200
    assert resp.content_type == "application/json"
    assert await resp.json() == {"name": "foo", "nb_page": 3}