"""Unit: Egress route lift + routes.yaml render + token
resolution (PRD 0017)."""

import unittest

from bot_bottle.egress import (
    CODEX_HOST_CREDENTIAL_TOKEN_REF,
    EgressRoute,
    egress_manifest_routes,
    egress_render_routes,
    egress_resolve_token_values,
    egress_routes_for_bottle,
    egress_token_env_map,
)
from bot_bottle.log import Die
from bot_bottle.manifest import Manifest
from bot_bottle.yaml_subset import parse_yaml_subset


def _bottle(routes):
    return Manifest.from_json_obj({
        "bottles": {"dev": {"egress": {"routes": routes}}},
        "agents": {"demo": {"skills": [], "prompt": "", "bottle": "dev"}},
    }).bottles["dev"]


def _provider_route(host: str, token_ref: str, *, tls_passthrough: bool = False) -> EgressRoute:
    return EgressRoute(
        host=host,
        auth_scheme="Bearer",
        token_ref=token_ref,
        tls_passthrough=tls_passthrough,
    )


class TestManifestRouteLift(unittest.TestCase):
    """egress_manifest_routes is a pure lifter — no slot assignment."""

    def test_authenticated_route_lifted_without_slot(self):
        b = _bottle([{
            "host": "api.github.com",
            "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"},
        }])
        routes = egress_manifest_routes(b)
        self.assertEqual(1, len(routes))
        r = routes[0]
        self.assertEqual("api.github.com", r.host)
        self.assertEqual("Bearer", r.auth_scheme)
        self.assertEqual("GH_PAT", r.token_ref)
        self.assertEqual("", r.token_env)  # slot assigned later
        self.assertEqual((), r.path_allowlist)

    def test_unauthenticated_route_has_empty_auth_fields(self):
        b = _bottle([{"host": "github.com", "path_allowlist": ["/x/"]}])
        routes = egress_manifest_routes(b)
        r = routes[0]
        self.assertEqual("", r.auth_scheme)
        self.assertEqual("", r.token_env)
        self.assertEqual("", r.token_ref)
        self.assertEqual(("/x/",), r.path_allowlist)


class TestSlotAssignment(unittest.TestCase):
    """Slot assignment happens in egress_routes_for_bottle."""

    def test_authenticated_route_gets_slot(self):
        b = _bottle([{
            "host": "api.github.com",
            "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"},
        }])
        routes = egress_routes_for_bottle(b)
        r = routes[0]
        self.assertEqual("EGRESS_TOKEN_0", r.token_env)
        self.assertEqual("GH_PAT", r.token_ref)

    def test_shared_token_ref_collapses_to_one_slot(self):
        b = _bottle([
            {"host": "api.github.com",
             "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"}},
            {"host": "github.com",
             "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"}},
        ])
        routes = egress_routes_for_bottle(b)
        slots = {r.token_env for r in routes}
        self.assertEqual({"EGRESS_TOKEN_0"}, slots)

    def test_distinct_token_refs_get_distinct_slots(self):
        b = _bottle([
            {"host": "a.example",
             "auth": {"scheme": "Bearer", "token_ref": "T1"}},
            {"host": "b.example",
             "auth": {"scheme": "Bearer", "token_ref": "T2"}},
        ])
        routes = egress_routes_for_bottle(b)
        slots = [r.token_env for r in routes]
        self.assertEqual(["EGRESS_TOKEN_0", "EGRESS_TOKEN_1"], slots)

    def test_unauthenticated_routes_dont_consume_slots(self):
        # A bare-pass route between two authenticated routes mustn't
        # skip a slot number — slot 0 + slot 1 stay tight.
        b = _bottle([
            {"host": "a.example",
             "auth": {"scheme": "Bearer", "token_ref": "T1"}},
            {"host": "passthrough.example"},
            {"host": "b.example",
             "auth": {"scheme": "Bearer", "token_ref": "T2"}},
        ])
        routes = egress_routes_for_bottle(b)
        authed = [r.token_env for r in routes if r.token_env]
        self.assertEqual(["EGRESS_TOKEN_0", "EGRESS_TOKEN_1"], authed)
        self.assertEqual("", routes[1].token_env)


class TestRoutesForBottleManifestOnly(unittest.TestCase):
    """Without provider routes the effective table is exactly the manifest."""

    def test_no_manifest_routes_means_no_effective_routes(self):
        b = _bottle([])
        self.assertEqual((), egress_routes_for_bottle(b))

    def test_manifest_route_preserved_with_auth(self):
        b = _bottle([{
            "host": "api.anthropic.com",
            "auth": {"scheme": "Bearer", "token_ref": "T"},
        }])
        routes = egress_routes_for_bottle(b)
        self.assertEqual(1, len(routes))
        self.assertEqual("api.anthropic.com", routes[0].host)
        self.assertEqual("Bearer", routes[0].auth_scheme)

    def test_manifest_only(self):
        b = _bottle([{"host": "x.example"}])
        effective = [r.host for r in egress_routes_for_bottle(b)]
        self.assertEqual(["x.example"], effective)

    def test_tls_passthrough_lifted_from_manifest(self):
        b = _bottle([{
            "host": "api.openai.com",
            "auth": {"scheme": "Bearer", "token_ref": "T"},
            "pipelock": {"tls_passthrough": True},
        }])
        routes = egress_routes_for_bottle(b)
        self.assertTrue(routes[0].tls_passthrough)

    def test_tls_passthrough_false_by_default(self):
        b = _bottle([{"host": "api.github.com"}])
        routes = egress_routes_for_bottle(b)
        self.assertFalse(routes[0].tls_passthrough)


class TestProviderRouteMerge(unittest.TestCase):
    """Provider routes win on host collision; manifest fills the rest."""

    def test_provider_route_appended_when_not_in_manifest(self):
        b = _bottle([])
        pr = _provider_route("api.openai.com", "TOK")
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertEqual(1, len(routes))
        self.assertEqual("api.openai.com", routes[0].host)
        self.assertEqual("Bearer", routes[0].auth_scheme)
        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
        self.assertEqual("TOK", routes[0].token_ref)

    def test_unauthenticated_provider_route_appends_without_token_slot(self):
        b = _bottle([])
        pr = EgressRoute(host="api.openai.com", tls_passthrough=True)
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertEqual(1, len(routes))
        self.assertEqual("api.openai.com", routes[0].host)
        self.assertEqual("", routes[0].auth_scheme)
        self.assertEqual("", routes[0].token_env)
        self.assertEqual("", routes[0].token_ref)
        self.assertEqual({}, egress_token_env_map(routes))

    def test_provider_route_wins_over_bare_manifest_route(self):
        # Provisioned host wins outright; manifest path_allowlist is dropped.
        b = _bottle([{"host": "api.openai.com", "path_allowlist": ["/v1/"]}])
        pr = EgressRoute(host="api.openai.com", tls_passthrough=True)
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertEqual(1, len(routes))
        self.assertEqual("", routes[0].auth_scheme)
        self.assertEqual("", routes[0].token_env)
        self.assertEqual("", routes[0].token_ref)
        self.assertTrue(routes[0].tls_passthrough)
        self.assertEqual((), routes[0].path_allowlist)
        self.assertEqual({}, egress_token_env_map(routes))

    def test_two_provider_routes_with_same_token_ref_share_slot(self):
        b = _bottle([])
        routes = egress_routes_for_bottle(b, (
            _provider_route("api.openai.com", CODEX_HOST_CREDENTIAL_TOKEN_REF),
            _provider_route("chatgpt.com",    CODEX_HOST_CREDENTIAL_TOKEN_REF),
        ))
        self.assertEqual(["api.openai.com", "chatgpt.com"], [r.host for r in routes])
        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
        self.assertEqual("EGRESS_TOKEN_0", routes[1].token_env)

    def test_provider_route_wins_over_authed_manifest_route(self):
        # Provider wins even when manifest has its own auth for the host.
        b = _bottle([{"host": "chatgpt.com",
                      "path_allowlist": ["/backend-api/"],
                      "auth": {"scheme": "Bearer", "token_ref": "OTHER"}}])
        pr = _provider_route("chatgpt.com", CODEX_HOST_CREDENTIAL_TOKEN_REF)
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertEqual(1, len(routes))
        self.assertEqual("chatgpt.com", routes[0].host)
        self.assertEqual("Bearer", routes[0].auth_scheme)
        self.assertEqual("EGRESS_TOKEN_0", routes[0].token_env)
        self.assertEqual(CODEX_HOST_CREDENTIAL_TOKEN_REF, routes[0].token_ref)
        self.assertEqual((), routes[0].path_allowlist)

    def test_manifest_route_preserved_for_non_provisioned_host(self):
        b = _bottle([
            {"host": "api.openai.com"},
            {"host": "api.github.com",
             "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"}},
        ])
        pr = _provider_route("api.openai.com", CODEX_HOST_CREDENTIAL_TOKEN_REF)
        routes = egress_routes_for_bottle(b, (pr,))
        hosts = [r.host for r in routes]
        self.assertEqual(["api.openai.com", "api.github.com"], hosts)
        self.assertEqual(CODEX_HOST_CREDENTIAL_TOKEN_REF, routes[0].token_ref)
        self.assertEqual("GH_PAT", routes[1].token_ref)

    def test_provider_route_tls_passthrough_set_on_appended_route(self):
        b = _bottle([])
        pr = _provider_route("api.openai.com", "TOK", tls_passthrough=True)
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertTrue(routes[0].tls_passthrough)

    def test_provider_route_tls_passthrough_wins_over_bare_manifest_route(self):
        b = _bottle([{"host": "api.openai.com"}])
        pr = _provider_route("api.openai.com", "TOK", tls_passthrough=True)
        routes = egress_routes_for_bottle(b, (pr,))
        self.assertTrue(routes[0].tls_passthrough)


class TestTokenEnvMap(unittest.TestCase):
    def test_only_authenticated_routes_contribute(self):
        b = _bottle([
            {"host": "a.example",
             "auth": {"scheme": "Bearer", "token_ref": "T1"}},
            {"host": "passthrough.example"},
        ])
        routes = egress_routes_for_bottle(b)
        m = egress_token_env_map(routes)
        self.assertEqual({"EGRESS_TOKEN_0": "T1"}, m)

    def test_no_routes_empty(self):
        self.assertEqual({}, egress_token_env_map(()))


class TestRenderRoutes(unittest.TestCase):
    """Render is YAML now (PRD 0017 follow-up). Tests parse the
    output via `yaml_subset` — the same parser the addon uses —
    so the assertions check the actual semantic shape the addon
    will see, not the textual layout."""

    @staticmethod
    def _parsed(routes) -> list[dict]:
        return parse_yaml_subset(egress_render_routes(routes))["routes"]

    def test_authenticated_route_serialised_with_auth_fields(self):
        b = _bottle([{
            "host": "api.github.com",
            "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"},
            "path_allowlist": ["/repos/x/"],
        }])
        routes = egress_routes_for_bottle(b)
        parsed = self._parsed(routes)
        self.assertEqual(
            [{
                "host": "api.github.com",
                "path_allowlist": ["/repos/x/"],
                "auth_scheme": "Bearer",
                "token_env": "EGRESS_TOKEN_0",
            }],
            parsed,
        )

    def test_unauthenticated_route_omits_auth_fields(self):
        # auth_scheme + token_env keys are absent when the route was
        # declared without an `auth` block — the addon's parser
        # enforces both-or-neither, so emitting empty strings would
        # round-trip as a partial pair and crash.
        b = _bottle([{"host": "github.com", "path_allowlist": ["/x/"]}])
        routes = egress_routes_for_bottle(b)
        entry = self._parsed(routes)[0]
        self.assertNotIn("auth_scheme", entry)
        self.assertNotIn("token_env", entry)

    def test_no_path_allowlist_omits_field(self):
        b = _bottle([{
            "host": "api.anthropic.com",
            "auth": {"scheme": "Bearer", "token_ref": "CL"},
        }])
        routes = egress_routes_for_bottle(b)
        self.assertNotIn("path_allowlist", self._parsed(routes)[0])

    def test_empty_routes_round_trips(self):
        rendered = egress_render_routes(())
        # Inline-empty-list form is what the parser accepts.
        self.assertEqual([], parse_yaml_subset(rendered)["routes"])

    def test_round_trip_through_addon_core(self):
        # Render here → parse in the addon must succeed for every
        # combination the manifest can produce.
        from bot_bottle.egress_addon_core import load_routes
        b = _bottle([
            {"host": "api.github.com",
             "auth": {"scheme": "Bearer", "token_ref": "GH_PAT"},
             "path_allowlist": ["/repos/x/"]},
            {"host": "github.com", "path_allowlist": ["/x/"]},
            {"host": "api.anthropic.com"},
        ])
        routes = egress_routes_for_bottle(b)
        addon_routes = load_routes(egress_render_routes(routes))
        self.assertEqual(3, len(addon_routes))
        self.assertEqual("Bearer", addon_routes[0].auth_scheme)
        self.assertEqual("EGRESS_TOKEN_0", addon_routes[0].token_env)
        self.assertEqual("", addon_routes[1].auth_scheme)
        self.assertEqual("", addon_routes[2].auth_scheme)


class TestResolveTokenValues(unittest.TestCase):
    def test_reads_host_env(self):
        out = egress_resolve_token_values(
            {"EGRESS_TOKEN_0": "GH_PAT"},
            {"GH_PAT": "the-value"},
        )
        self.assertEqual({"EGRESS_TOKEN_0": "the-value"}, out)

    def test_missing_token_ref_dies(self):
        with self.assertRaises(Die):
            egress_resolve_token_values(
                {"EGRESS_TOKEN_0": "GH_PAT"},
                {},
            )

    def test_empty_token_ref_dies(self):
        with self.assertRaises(Die):
            egress_resolve_token_values(
                {"EGRESS_TOKEN_0": "GH_PAT"},
                {"GH_PAT": ""},
            )

    def test_codex_host_credential_ref_resolved_via_provisioned_env(self):
        out = egress_resolve_token_values(
            {"EGRESS_TOKEN_0": CODEX_HOST_CREDENTIAL_TOKEN_REF},
            {CODEX_HOST_CREDENTIAL_TOKEN_REF: "codex-access-token"},
        )
        self.assertEqual({"EGRESS_TOKEN_0": "codex-access-token"}, out)


if __name__ == "__main__":
    unittest.main()
