"""HTTP-level tests for ``crafting_table_mcp.client.CraftingTableClient``.

We stub the wire layer with ``responses`` and assert each method:

- hits the correct endpoint with the correct shape (verb, path, body, params)
- raises the right exception class for each well-known status code
- handles malformed JSON / unexpected response types without crashing
"""
from __future__ import annotations

import json
import unittest

import responses

from crafting_table_mcp.client import (
    CraftingTableAPIError,
    CraftingTableAuthError,
    CraftingTableClient,
    CraftingTableError,
    CraftingTableNotFoundError,
    CraftingTableTransportError,
)


BASE_URL = "http://crafting-table.test:8810"
TOKEN = "ct_test_token_xxxxxxxx"


def _client() -> CraftingTableClient:
    return CraftingTableClient(base_url=BASE_URL, token=TOKEN, timeout_secs=10)


class TestConstructorValidation(unittest.TestCase):
    def test_requires_base_url(self) -> None:
        with self.assertRaises(ValueError):
            CraftingTableClient(base_url="", token=TOKEN)

    def test_requires_token(self) -> None:
        with self.assertRaises(ValueError):
            CraftingTableClient(base_url=BASE_URL, token="")

    def test_strips_trailing_slash(self) -> None:
        c = CraftingTableClient(base_url=BASE_URL + "/", token=TOKEN)
        self.assertEqual(c.base_url, BASE_URL)


class TestHealthz(unittest.TestCase):
    @responses.activate
    def test_healthz_ok(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/healthz",
            json={"ok": True, "db": "ok", "version": "0.1.0"},
            status=200,
        )
        c = _client()
        try:
            r = c.healthz()
        finally:
            c.close()
        self.assertEqual(r["ok"], True)
        self.assertEqual(r["version"], "0.1.0")

    @responses.activate
    def test_healthz_sends_bearer(self) -> None:
        captured: dict = {}

        def cb(request):
            captured["auth"] = request.headers.get("Authorization")
            return (200, {}, json.dumps({"ok": True}))

        responses.add_callback(responses.GET, f"{BASE_URL}/healthz", callback=cb)
        c = _client()
        try:
            c.healthz()
        finally:
            c.close()
        self.assertEqual(captured["auth"], f"Bearer {TOKEN}")


class TestProjects(unittest.TestCase):
    @responses.activate
    def test_list_projects_returns_array(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={
                "ok": True,
                "projects": [
                    {"name": "alpha", "git_url": "..."},
                    {"name": "bravo", "git_url": "..."},
                ],
            },
            status=200,
        )
        c = _client()
        try:
            rows = c.list_projects()
        finally:
            c.close()
        self.assertEqual(len(rows), 2)
        self.assertEqual(rows[0]["name"], "alpha")

    @responses.activate
    def test_list_projects_handles_empty(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"ok": True, "projects": []},
            status=200,
        )
        c = _client()
        try:
            rows = c.list_projects()
        finally:
            c.close()
        self.assertEqual(rows, [])

    @responses.activate
    def test_get_project_path_and_unwrap(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects/alpha",
            json={"ok": True, "project": {"name": "alpha", "git_url": "..."}},
            status=200,
        )
        c = _client()
        try:
            p = c.get_project("alpha")
        finally:
            c.close()
        self.assertEqual(p["name"], "alpha")

    def test_get_project_rejects_empty_name(self) -> None:
        c = _client()
        try:
            with self.assertRaises(ValueError):
                c.get_project("")
        finally:
            c.close()

    @responses.activate
    def test_get_project_url_quoted(self) -> None:
        # Slash in a project name shouldn't break the URL — the client
        # quotes it. Server-side validation is a separate concern; the
        # client must not produce malformed paths.
        captured: dict = {}

        def cb(request):
            captured["url"] = request.url
            return (200, {}, json.dumps({"ok": True, "project": {"name": "x"}}))

        responses.add_callback(
            responses.GET,
            f"{BASE_URL}/projects/weird%2Fname",
            callback=cb,
        )
        c = _client()
        try:
            c.get_project("weird/name")
        finally:
            c.close()
        self.assertIn("weird%2Fname", captured["url"])

    @responses.activate
    def test_register_project_posts_body(self) -> None:
        captured: dict = {}

        def cb(request):
            captured["body"] = json.loads(request.body)
            return (
                200,
                {},
                json.dumps(
                    {"ok": True, "project": {"name": "alpha", "git_url": "x"}}
                ),
            )

        responses.add_callback(responses.POST, f"{BASE_URL}/projects", callback=cb)
        c = _client()
        try:
            r = c.register_project(
                {"name": "alpha", "git_url": "http://example/x.git"}
            )
        finally:
            c.close()
        self.assertEqual(captured["body"]["name"], "alpha")
        self.assertEqual(r["name"], "alpha")

    def test_register_project_requires_name(self) -> None:
        c = _client()
        try:
            with self.assertRaises(ValueError):
                c.register_project({"git_url": "..."})
        finally:
            c.close()

    def test_register_project_requires_dict(self) -> None:
        c = _client()
        try:
            with self.assertRaises(ValueError):
                c.register_project("not a dict")  # type: ignore[arg-type]
        finally:
            c.close()

    @responses.activate
    def test_update_project_uses_put(self) -> None:
        responses.add(
            responses.PUT,
            f"{BASE_URL}/projects/alpha",
            json={"ok": True, "project": {"name": "alpha", "git_url": "y"}},
            status=200,
        )
        c = _client()
        try:
            r = c.update_project("alpha", {"name": "alpha", "git_url": "y"})
        finally:
            c.close()
        self.assertEqual(r["git_url"], "y")

    @responses.activate
    def test_delete_project(self) -> None:
        responses.add(
            responses.DELETE,
            f"{BASE_URL}/projects/alpha",
            json={"ok": True},
            status=200,
        )
        c = _client()
        try:
            r = c.delete_project("alpha")
        finally:
            c.close()
        self.assertEqual(r, {"ok": True})


class TestJobs(unittest.TestCase):
    @responses.activate
    def test_create_job_posts_recipe(self) -> None:
        captured: dict = {}

        def cb(request):
            captured["body"] = json.loads(request.body)
            return (
                200,
                {},
                json.dumps(
                    {
                        "ok": True,
                        "job_id": "j-1",
                        "status": "queued",
                        "job": {"id": "j-1"},
                    }
                ),
            )

        responses.add_callback(
            responses.POST,
            f"{BASE_URL}/projects/alpha/jobs",
            callback=cb,
        )
        c = _client()
        try:
            r = c.create_job(
                project="alpha",
                recipe="audit",
                subproject="clients/python",
                branch="dev",
            )
        finally:
            c.close()
        self.assertEqual(captured["body"]["recipe"], "audit")
        self.assertEqual(captured["body"]["subproject"], "clients/python")
        self.assertEqual(captured["body"]["branch"], "dev")
        self.assertEqual(r["job_id"], "j-1")
        self.assertEqual(r["status"], "queued")

    @responses.activate
    def test_create_job_omits_optional_fields(self) -> None:
        """When subproject/branch are None, they MUST NOT appear in the body.

        FastAPI accepts the missing-key form as the default, but a literal
        ``null`` would be rejected by Pydantic.
        """
        captured: dict = {}

        def cb(request):
            captured["body"] = json.loads(request.body)
            return (
                200,
                {},
                json.dumps(
                    {
                        "ok": True,
                        "job_id": "j-2",
                        "status": "queued",
                        "job": {"id": "j-2"},
                    }
                ),
            )

        responses.add_callback(
            responses.POST,
            f"{BASE_URL}/projects/alpha/jobs",
            callback=cb,
        )
        c = _client()
        try:
            c.create_job(project="alpha", recipe="build")
        finally:
            c.close()
        self.assertNotIn("subproject", captured["body"])
        self.assertNotIn("branch", captured["body"])

    def test_create_job_rejects_empty_project(self) -> None:
        c = _client()
        try:
            with self.assertRaises(ValueError):
                c.create_job(project="", recipe="audit")
        finally:
            c.close()

    def test_create_job_rejects_empty_recipe(self) -> None:
        c = _client()
        try:
            with self.assertRaises(ValueError):
                c.create_job(project="alpha", recipe="")
        finally:
            c.close()

    @responses.activate
    def test_get_job(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/j-1",
            json={
                "ok": True,
                "job": {"id": "j-1", "status": "succeeded", "exit_code": 0},
                "log_tail": ["line a", "line b"],
            },
            status=200,
        )
        c = _client()
        try:
            r = c.get_job("j-1")
        finally:
            c.close()
        self.assertEqual(r["job"]["status"], "succeeded")
        self.assertEqual(r["log_tail"], ["line a", "line b"])

    @responses.activate
    def test_list_jobs_with_filters(self) -> None:
        captured: dict = {}

        def cb(request):
            captured["params"] = dict(request.params) if hasattr(request, "params") else {}
            # responses attaches the parsed querystring on request.url.
            # Easier: just store the URL and parse later.
            captured["url"] = request.url
            return (
                200,
                {},
                json.dumps({"ok": True, "jobs": [{"id": "j-1"}, {"id": "j-2"}]}),
            )

        responses.add_callback(responses.GET, f"{BASE_URL}/jobs", callback=cb)
        c = _client()
        try:
            rows = c.list_jobs(project="alpha", status="succeeded", limit=10)
        finally:
            c.close()
        self.assertEqual(len(rows), 2)
        # Verify the params went out on the URL.
        self.assertIn("project=alpha", captured["url"])
        self.assertIn("status=succeeded", captured["url"])
        self.assertIn("limit=10", captured["url"])

    @responses.activate
    def test_list_jobs_no_filters(self) -> None:
        captured: dict = {}

        def cb(request):
            captured["url"] = request.url
            return (200, {}, json.dumps({"ok": True, "jobs": []}))

        responses.add_callback(responses.GET, f"{BASE_URL}/jobs", callback=cb)
        c = _client()
        try:
            c.list_jobs()
        finally:
            c.close()
        # No project / status; only limit (default 50) goes out.
        self.assertNotIn("project=", captured["url"])
        self.assertNotIn("status=", captured["url"])
        self.assertIn("limit=50", captured["url"])

    @responses.activate
    def test_get_findings(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/j-1/findings",
            json={
                "ok": True,
                "findings": [
                    {
                        "id": 1,
                        "kind": "lint",
                        "severity": "warn",
                        "message": "x",
                    }
                ],
            },
            status=200,
        )
        c = _client()
        try:
            rows = c.get_findings("j-1")
        finally:
            c.close()
        self.assertEqual(len(rows), 1)
        self.assertEqual(rows[0]["kind"], "lint")

    @responses.activate
    def test_get_findings_empty(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/j-1/findings",
            json={"ok": True, "findings": []},
            status=200,
        )
        c = _client()
        try:
            rows = c.get_findings("j-1")
        finally:
            c.close()
        self.assertEqual(rows, [])

    @responses.activate
    def test_get_log_returns_text(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/j-1/log",
            body="line 1\nline 2\nline 3\n",
            content_type="text/plain",
            status=200,
        )
        c = _client()
        try:
            text = c.get_log("j-1")
        finally:
            c.close()
        self.assertEqual(text, "line 1\nline 2\nline 3\n")


class TestExceptionMapping(unittest.TestCase):
    """Each well-known status code should raise its dedicated subclass."""

    @responses.activate
    def test_404_raises_not_found(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects/missing",
            json={"detail": "project not found"},
            status=404,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableNotFoundError) as ctx:
                c.get_project("missing")
        finally:
            c.close()
        self.assertEqual(ctx.exception.status_code, 404)

    @responses.activate
    def test_401_raises_auth(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"detail": "missing bearer"},
            status=401,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableAuthError) as ctx:
                c.list_projects()
        finally:
            c.close()
        self.assertEqual(ctx.exception.status_code, 401)

    @responses.activate
    def test_403_raises_auth(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"detail": "bad token"},
            status=403,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableAuthError):
                c.list_projects()
        finally:
            c.close()

    @responses.activate
    def test_500_raises_api_error(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"detail": "boom"},
            status=500,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableAPIError) as ctx:
                c.list_projects()
        finally:
            c.close()
        self.assertEqual(ctx.exception.status_code, 500)
        # The base error class should NOT be a NotFound or Auth.
        self.assertNotIsInstance(ctx.exception, CraftingTableNotFoundError)
        self.assertNotIsInstance(ctx.exception, CraftingTableAuthError)

    @responses.activate
    def test_409_raises_api_error(self) -> None:
        responses.add(
            responses.POST,
            f"{BASE_URL}/projects",
            json={"detail": "project already exists; use PUT to update"},
            status=409,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableAPIError) as ctx:
                c.register_project({"name": "dup", "git_url": "x"})
        finally:
            c.close()
        self.assertEqual(ctx.exception.status_code, 409)
        self.assertIn("already exists", ctx.exception.message)

    @responses.activate
    def test_get_log_404_raises_not_found(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/missing/log",
            json={"detail": "log file not present"},
            status=404,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableNotFoundError):
                c.get_log("missing")
        finally:
            c.close()

    @responses.activate
    def test_get_log_401_raises_auth(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/jobs/x/log",
            body="bad token",
            status=401,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableAuthError):
                c.get_log("x")
        finally:
            c.close()


class TestTransportErrors(unittest.TestCase):
    """Network errors (no HTTP response) raise CraftingTableTransportError."""

    def test_unreachable_host(self) -> None:
        # Use a port that's almost certainly closed to force a TCP refusal.
        # Tests don't require the real port-8810 service to be up.
        c = CraftingTableClient(
            base_url="http://127.0.0.1:1",
            token=TOKEN,
            timeout_secs=2,
        )
        try:
            with self.assertRaises(CraftingTableTransportError):
                c.healthz()
        finally:
            c.close()


class TestUnexpectedResponseShapes(unittest.TestCase):
    """Bad JSON / wrong types should raise CraftingTableError, not crash."""

    @responses.activate
    def test_healthz_non_dict(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/healthz",
            json=["unexpected", "list"],
            status=200,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableError):
                c.healthz()
        finally:
            c.close()

    @responses.activate
    def test_list_projects_missing_key(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"ok": True},  # no 'projects' key
            status=200,
        )
        c = _client()
        try:
            rows = c.list_projects()
        finally:
            c.close()
        self.assertEqual(rows, [])  # missing-key path returns []

    @responses.activate
    def test_list_projects_wrong_type(self) -> None:
        responses.add(
            responses.GET,
            f"{BASE_URL}/projects",
            json={"ok": True, "projects": "not a list"},
            status=200,
        )
        c = _client()
        try:
            with self.assertRaises(CraftingTableError):
                c.list_projects()
        finally:
            c.close()


if __name__ == "__main__":  # pragma: no cover
    unittest.main()