import asyncio
from sanic.blueprints import Blueprint
from sanic.views import CompositionView
from sanic.views import HTTPMethodView
from sanic.views import stream as stream_decorator
from sanic.response import stream, text
from sanic.request import StreamBuffer


data = "abc" * 10000000


def test_request_stream_method_view(app):
    """for self.is_request_stream = True"""

    class SimpleView(HTTPMethodView):
        def get(self, request):
            assert request.stream is None
            return text("OK")

        @stream_decorator
        async def post(self, request):
            assert isinstance(request.stream, StreamBuffer)
            result = ""
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                result += body.decode("utf-8")
            return text(result)

    app.add_route(SimpleView.as_view(), "/method_view")

    assert app.is_request_stream is True

    request, response = app.test_client.get("/method_view")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/method_view", data=data)
    assert response.status == 200
    assert response.text == data


def test_request_stream_app(app):
    """for self.is_request_stream = True and decorators"""

    @app.get("/get")
    async def get(request):
        assert request.stream is None
        return text("GET")

    @app.head("/head")
    async def head(request):
        assert request.stream is None
        return text("HEAD")

    @app.delete("/delete")
    async def delete(request):
        assert request.stream is None
        return text("DELETE")

    @app.options("/options")
    async def options(request):
        assert request.stream is None
        return text("OPTIONS")

    @app.post("/_post/<id>")
    async def _post(request, id):
        assert request.stream is None
        return text("_POST")

    @app.post("/post/<id>", stream=True)
    async def post(request, id):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    @app.put("/_put")
    async def _put(request):
        assert request.stream is None
        return text("_PUT")

    @app.put("/put", stream=True)
    async def put(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    @app.patch("/_patch")
    async def _patch(request):
        assert request.stream is None
        return text("_PATCH")

    @app.patch("/patch", stream=True)
    async def patch(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    assert app.is_request_stream is True

    request, response = app.test_client.get("/get")
    assert response.status == 200
    assert response.text == "GET"

    request, response = app.test_client.head("/head")
    assert response.status == 200
    assert response.text == ""

    request, response = app.test_client.delete("/delete")
    assert response.status == 200
    assert response.text == "DELETE"

    request, response = app.test_client.options("/options")
    assert response.status == 200
    assert response.text == "OPTIONS"

    request, response = app.test_client.post("/_post/1", data=data)
    assert response.status == 200
    assert response.text == "_POST"

    request, response = app.test_client.post("/post/1", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.put("/_put", data=data)
    assert response.status == 200
    assert response.text == "_PUT"

    request, response = app.test_client.put("/put", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.patch("/_patch", data=data)
    assert response.status == 200
    assert response.text == "_PATCH"

    request, response = app.test_client.patch("/patch", data=data)
    assert response.status == 200
    assert response.text == data


def test_request_stream_handle_exception(app):
    """for handling exceptions properly"""

    @app.post("/post/<id>", stream=True)
    async def post(request, id):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    # 404
    request, response = app.test_client.post("/in_valid_post", data=data)
    assert response.status == 404
    assert response.text == "Error: Requested URL /in_valid_post not found"

    # 405
    request, response = app.test_client.get("/post/random_id", data=data)
    assert response.status == 405
    assert (
        response.text == "Error: Method GET not allowed for URL"
        " /post/random_id"
    )


def test_request_stream_blueprint(app):
    """for self.is_request_stream = True"""
    bp = Blueprint("test_blueprint_request_stream_blueprint")

    @app.get("/get")
    async def get(request):
        assert request.stream is None
        return text("GET")

    @bp.head("/head")
    async def head(request):
        assert request.stream is None
        return text("HEAD")

    @bp.delete("/delete")
    async def delete(request):
        assert request.stream is None
        return text("DELETE")

    @bp.options("/options")
    async def options(request):
        assert request.stream is None
        return text("OPTIONS")

    @bp.post("/_post/<id>")
    async def _post(request, id):
        assert request.stream is None
        return text("_POST")

    @bp.post("/post/<id>", stream=True)
    async def post(request, id):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    @bp.put("/_put")
    async def _put(request):
        assert request.stream is None
        return text("_PUT")

    @bp.put("/put", stream=True)
    async def put(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    @bp.patch("/_patch")
    async def _patch(request):
        assert request.stream is None
        return text("_PATCH")

    @bp.patch("/patch", stream=True)
    async def patch(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    async def post_add_route(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))
        return stream(streaming)

    bp.add_route(post_add_route, '/post/add_route', methods=['POST'], stream=True)
    app.blueprint(bp)

    assert app.is_request_stream is True

    request, response = app.test_client.get("/get")
    assert response.status == 200
    assert response.text == "GET"

    request, response = app.test_client.head("/head")
    assert response.status == 200
    assert response.text == ""

    request, response = app.test_client.delete("/delete")
    assert response.status == 200
    assert response.text == "DELETE"

    request, response = app.test_client.options("/options")
    assert response.status == 200
    assert response.text == "OPTIONS"

    request, response = app.test_client.post("/_post/1", data=data)
    assert response.status == 200
    assert response.text == "_POST"

    request, response = app.test_client.post("/post/1", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.put("/_put", data=data)
    assert response.status == 200
    assert response.text == "_PUT"

    request, response = app.test_client.put("/put", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.patch("/_patch", data=data)
    assert response.status == 200
    assert response.text == "_PATCH"

    request, response = app.test_client.patch("/patch", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.post("/post/add_route", data=data)
    assert response.status == 200
    assert response.text == data


def test_request_stream_composition_view(app):
    """for self.is_request_stream = True"""

    def get_handler(request):
        assert request.stream is None
        return text("OK")

    async def post_handler(request):
        assert isinstance(request.stream, StreamBuffer)
        result = ""
        while True:
            body = await request.stream.read()
            if body is None:
                break
            result += body.decode("utf-8")
        return text(result)

    view = CompositionView()
    view.add(["GET"], get_handler)
    view.add(["POST"], post_handler, stream=True)
    app.add_route(view, "/composition_view")

    assert app.is_request_stream is True

    request, response = app.test_client.get("/composition_view")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/composition_view", data=data)
    assert response.status == 200
    assert response.text == data


def test_request_stream(app):
    """test for complex application"""
    bp = Blueprint("test_blueprint_request_stream")

    class SimpleView(HTTPMethodView):
        def get(self, request):
            assert request.stream is None
            return text("OK")

        @stream_decorator
        async def post(self, request):
            assert isinstance(request.stream, StreamBuffer)
            result = ""
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                result += body.decode("utf-8")
            return text(result)

    @app.post("/stream", stream=True)
    async def handler(request):
        assert isinstance(request.stream, StreamBuffer)

        async def streaming(response):
            while True:
                body = await request.stream.read()
                if body is None:
                    break
                await response.write(body.decode("utf-8"))

        return stream(streaming)

    @app.get("/get")
    async def get(request):
        assert request.stream is None
        return text("OK")

    @bp.post("/bp_stream", stream=True)
    async def bp_stream(request):
        assert isinstance(request.stream, StreamBuffer)
        result = ""
        while True:
            body = await request.stream.read()
            if body is None:
                break
            result += body.decode("utf-8")
        return text(result)

    @bp.get("/bp_get")
    async def bp_get(request):
        assert request.stream is None
        return text("OK")

    def get_handler(request):
        assert request.stream is None
        return text("OK")

    async def post_handler(request):
        assert isinstance(request.stream, StreamBuffer)
        result = ""
        while True:
            body = await request.stream.read()
            if body is None:
                break
            result += body.decode("utf-8")
        return text(result)

    app.add_route(SimpleView.as_view(), "/method_view")

    view = CompositionView()
    view.add(["GET"], get_handler)
    view.add(["POST"], post_handler, stream=True)

    app.blueprint(bp)

    app.add_route(view, "/composition_view")

    assert app.is_request_stream is True

    request, response = app.test_client.get("/method_view")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/method_view", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.get("/composition_view")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/composition_view", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.get("/get")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/stream", data=data)
    assert response.status == 200
    assert response.text == data

    request, response = app.test_client.get("/bp_get")
    assert response.status == 200
    assert response.text == "OK"

    request, response = app.test_client.post("/bp_stream", data=data)
    assert response.status == 200
    assert response.text == data