defmodule VavPipeline.BigdeiKodeshTest do
  @moduledoc """
  Tests for the Bigdei Kodesh — the HTTP API layer.

  Shemot 28:2 — V'asita vigdei kodesh l'Aharon achicha,
  l'khavod ul'tifaret.

  Four garments for four access tiers:
    /peah/*       — public, no auth
    /courtyard/*  — authenticated
    /chatzer/*    — full access
    /kodesh/*     — operator
  """

  use ExUnit.Case, async: false

  import Plug.Test
  import Plug.Conn

  alias VavPipeline.BigdeiKodesh.Router

  @opts Router.init([])

  # Tablet 55: a consultation the judges can be pointed at (judge.erl reads
  # {M, F} from the sanhedrin env). Seat 2 (challenge) finds a kushya; the
  # other seats read the verse as resolved.
  def fake_consult(:challenge, _ref, _roots, _q, _ctx),
    do: {:ok, %{status: "challenged", text: "", kushya: "but the verse says otherwise", verses: [{:devarim, 6, 4}]}}

  def fake_consult(_step, _ref, _roots, _q, _ctx),
    do: {:ok, %{status: "resolved", text: "the reading", verses: [{:bereishit, 1, 1}]}}

  # A day's manna for the chatzer tests: a panel spends one unit of
  # sanhedrin_panels_max (tablet 55), so the ledger must hold a provision.
  defp write_provision(panels) do
    VavPipeline.MannaLedger.reset()
    on_exit(fn -> VavPipeline.MannaLedger.reset() end)
    today = Date.utc_today() |> Date.to_iso8601()
    expires = DateTime.utc_now() |> DateTime.add(6 * 3600) |> DateTime.to_iso8601()

    provision = %{
      "date" => today,
      "provision" => %{"compute_units" => 50, "memory_mb" => 512, "api_calls_external" => 10, "storage_delta_mb" => 2, "sanhedrin_panels_max" => panels},
      "type" => "regular",
      "expires_at" => expires,
      "written_by" => "bigdei_kodesh_test",
      "written_at" => DateTime.utc_now() |> DateTime.to_iso8601()
    }

    path = VavPipeline.Manna.provision_file()
    File.mkdir_p!(Path.dirname(path))
    File.write!(path, Jason.encode!(provision))
    on_exit(fn -> File.rm(path) end)
  end

  # ============================================================
  # Pe'ah — Public Endpoint (Machaneh Yisrael)
  # ============================================================
  describe "Pe'ah endpoint" do
    test "GET /peah/ask without question returns usage" do
      conn =
        conn(:get, "/peah/ask")
        |> Router.call(@opts)

      assert conn.status == 200
      body = Jason.decode!(conn.resp_body)
      assert body["message"] =~ "Bikoret"
      assert body["usage"] =~ "/peah/ask"
    end

    test "GET /peah/ask with question parameter processes it" do
      conn =
        conn(:get, "/peah/ask?question=What+is+bereishit")
        |> Router.call(@opts)

      # Should return 200 or 503 (if waiting for provision)
      assert conn.status in [200, 503]
    end

    test "POST /peah/ask with valid question" do
      conn =
        conn(:post, "/peah/ask", Jason.encode!(%{question: "What is bereishit?"}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status in [200, 503]

      body = Jason.decode!(conn.resp_body)

      if conn.status == 200 do
        assert Map.has_key?(body, "answer") or Map.has_key?(body, "processing")
      end
    end

    test "POST /peah/ask without question returns 422" do
      conn =
        conn(:post, "/peah/ask", Jason.encode!(%{not_question: "wrong field"}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status == 422
      body = Jason.decode!(conn.resp_body)
      assert body["error"]["code"] == "KIYOR_VALIDATION_FAILED"
      assert body["error"]["type"] == "purification_needed"
    end

    test "POST /peah/ask with empty question returns 422" do
      conn =
        conn(:post, "/peah/ask", Jason.encode!(%{question: ""}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status == 422
    end
  end

  # ============================================================
  # Pe'ah — Azazel disposal log (commit 8, public half of property 9)
  # ============================================================
  # Privacy boundary tests run WITHOUT a database (the empty L3 case
  # exercises the response shape and the privacy guarantees). Tests
  # that need actual disposal records to query are tagged :l3.

  describe "GET /peah/azazel_log — public observability" do
    # When L3 is up (BIKORET_L3=1) the endpoint queries the sandboxed
    # Repo, so the test process must own a connection; without L3 the
    # endpoint answers from an empty log and there is nothing to check out.
    setup do
      if Process.whereis(VavPipeline.Repo),
        do: :ok = Ecto.Adapters.SQL.Sandbox.checkout(VavPipeline.Repo)

      :ok
    end

    test "responds with 200 even when no disposals are recorded" do
      conn =
        conn(:get, "/peah/azazel_log")
        |> Router.call(@opts)

      assert conn.status == 200
      body = Jason.decode!(conn.resp_body)
      assert is_integer(body["total_disposals"])
      assert is_list(body["recent"])
      assert is_map(body["categorical_aggregate"])
    end

    test "response carries the privacy boundary statement" do
      conn =
        conn(:get, "/peah/azazel_log")
        |> Router.call(@opts)

      body = Jason.decode!(conn.resp_body)
      # Property 9's privacy boundary must be visible to the caller —
      # they need to know that the items they don't see are
      # operator-internal, not missing.
      assert body["privacy_boundary"] =~ "operator-internal"
      assert body["privacy_boundary"] =~ "Property 9"
    end

    test "response carries the disclosure block (kichush + horaah)" do
      conn =
        conn(:get, "/peah/azazel_log")
        |> Router.call(@opts)

      body = Jason.decode!(conn.resp_body)
      # Mirrors every other Torah-content response from commit 5e00f75
      assert body["disclosure"]["origin"]
      assert body["disclosure"]["not_horaah"]
      assert body["disclosure"]["torah_basis"]
    end

    test "since=invalid returns all_time" do
      conn =
        conn(:get, "/peah/azazel_log?since=not-a-timestamp")
        |> Router.call(@opts)

      body = Jason.decode!(conn.resp_body)
      assert body["since"] == "all_time"
    end

    test "since=valid_iso8601 is echoed in response" do
      conn =
        conn(:get, "/peah/azazel_log?since=2026-04-28T00:00:00Z")
        |> Router.call(@opts)

      body = Jason.decode!(conn.resp_body)
      assert body["since"] == "2026-04-28T00:00:00Z"
    end

    test "categorical_aggregate has all three slots even when empty" do
      conn =
        conn(:get, "/peah/azazel_log")
        |> Router.call(@opts)

      body = Jason.decode!(conn.resp_body)
      agg = body["categorical_aggregate"]
      # All three slots present (the public sees the SHAPE of the
      # vidui structure, not its contents)
      assert Map.has_key?(agg, "avonot")
      assert Map.has_key?(agg, "peshaim")
      assert Map.has_key?(agg, "chatot")
    end

    @tag :l3
    test "with disposals: aggregate counts categories accurately" do
      base = %{
        case_ref: "log-001",
        vidui: %{
          "avonot" => ["halt avodah_zarah: x"],
          "peshaim" => [],
          "chatot" => [],
          "confessor" => "kohen",
          "confessed_at" => "2026-04-28T12:00:00Z"
        },
        routing: "eretz_gezerah",
        authorized_by: "kohen-gadol",
        shaliach: "ish-itti",
        disposed_at: ~U[2026-04-28 12:00:01Z]
      }

      {:ok, _} = VavPipeline.L3.Store.record_disposal(base)
      {:ok, _} = VavPipeline.L3.Store.record_disposal(Map.put(base, :case_ref, "log-002"))

      conn = conn(:get, "/peah/azazel_log") |> Router.call(@opts)
      body = Jason.decode!(conn.resp_body)

      assert body["total_disposals"] == 2
      assert body["categorical_aggregate"]["avonot"] == 2
    end

    @tag :l3
    test "PRIVACY BOUNDARY: response NEVER contains vidui item strings" do
      secret_phrase =
        "kohen-confidential-content-that-must-never-leak-to-public-endpoint"

      attrs = %{
        case_ref: "privacy-001",
        vidui: %{
          "avonot" => [],
          "peshaim" => [],
          "chatot" => [secret_phrase],
          "confessor" => "kohen",
          "confessed_at" => "2026-04-28T12:00:00Z"
        },
        routing: "eretz_gezerah",
        authorized_by: "kohen-gadol",
        shaliach: "ish-itti",
        disposed_at: ~U[2026-04-28 12:00:01Z]
      }

      {:ok, _} = VavPipeline.L3.Store.record_disposal(attrs)

      conn = conn(:get, "/peah/azazel_log") |> Router.call(@opts)

      # The response body — as a string — must NOT contain the
      # vidui item content. This is the load-bearing privacy
      # guarantee; if the secret_phrase appears anywhere in the
      # response, the public endpoint is leaking operator-internal
      # state.
      refute conn.resp_body =~ secret_phrase
    end
  end

  # ============================================================
  # Courtyard — Authenticated Endpoint
  # ============================================================
  describe "Courtyard endpoint" do
    test "POST /courtyard/offering without auth returns 401" do
      conn =
        conn(:post, "/courtyard/offering", Jason.encode!(%{content: "test"}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status == 401
      body = Jason.decode!(conn.resp_body)
      assert body["error"]["code"] == "UNAUTHORIZED"
    end

    test "POST /courtyard/offering with auth but no content returns 422" do
      conn =
        conn(:post, "/courtyard/offering", Jason.encode!(%{offering_type: "shelamim"}))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer test-token")
        |> Router.call(@opts)

      assert conn.status == 422
      body = Jason.decode!(conn.resp_body)
      assert body["error"]["code"] == "KIYOR_VALIDATION_FAILED"
    end

    test "POST /courtyard/offering with auth and content processes" do
      conn =
        conn(:post, "/courtyard/offering", Jason.encode!(%{
          content: "bereishit bara elohim",
          offering_type: "shelamim"
        }))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer test-token")
        |> Router.call(@opts)

      assert conn.status in [200, 503]

      if conn.status == 200 do
        body = Jason.decode!(conn.resp_body)
        assert Map.has_key?(body, "offering_id")
        assert Map.has_key?(body, "offering_receipt")
        assert body["offering_receipt"]["type"] == "shelamim"
      end
    end
  end

  # ============================================================
  # Chatzer — Sanhedrin Endpoint
  # ============================================================
  describe "Chatzer endpoint" do
    test "POST /chatzer/sanhedrin without auth returns 401" do
      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{case: "test case"}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status == 401
    end

    test "POST /chatzer/sanhedrin without case returns 422" do
      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{not_case: "wrong field"}))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)

      assert conn.status == 422
    end

    test "POST /chatzer/sanhedrin with valid case deliberates" do
      write_provision(2)

      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{
          case: "Is cooking on Shabbat permitted for pikuach nefesh?"
        }))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)

      assert conn.status == 200

      body = Jason.decode!(conn.resp_body)
      assert Map.has_key?(body, "case_ref")
      assert Map.has_key?(body, "deliberation")
      assert body["deliberation"]["outcome"] in ["accepted", "rejected", "teiku"]
      assert body["note"] =~ "not a binding ruling"
    end

    # Tablet 55: the Tamid's own example — a case WITH sides — returned
    # 500 and took the halt monitor and escalation down with it.
    test "POST /chatzer/sanhedrin with sides (the Tamid's example) deliberates" do
      write_provision(2)

      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{
          case: "A borrower repaid before one witness; the lender denies receipt. Who bears the burden?",
          sides: [
            %{position: "the borrower is believed", evidence: ["the money was handed over before a witness"]},
            %{position: "the lender is believed", evidence: ["one witness does not establish payment"]}
          ],
          complexity_hint: "monetary"
        }))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)

      assert conn.status == 200
      body = Jason.decode!(conn.resp_body)
      assert body["deliberation"]["outcome"] in ["accepted", "rejected", "teiku"]
      # the hint names the panel: monetary → three judges (sanhedrin.hrl)
      assert body["deliberation"]["panel_size"] == 3
      # the Tamid's shape — votes and sources, not vote_count and torah_refs
      assert Map.keys(body["deliberation"]["majority"]) |> Enum.sort() == ["position", "reasoning", "sources", "votes"]
      assert is_list(body["deliberation"]["majority"]["sources"])
      # the case was resolved before it was heard
      assert is_map(body["grounding"]["scope"])
      assert is_list(body["grounding"]["roots_consulted"])
      # and the gate is still standing afterwards
      assert Process.whereis(:halt_monitor) != nil
      assert Process.whereis(:escalation) != nil
    end

    # Tablet 55: without a Talmudic Engine to consult, the judges abstain
    # and the court says teiku — it does not accept on nothing.
    test "POST /chatzer/sanhedrin with no engine to consult is teiku, not accepted" do
      # The socket process may run in the test env; no engine answers behind it.
      Application.put_env(:sanhedrin, :consult, {VavPipeline.SanhedrinConsult, :consult})
      write_provision(2)

      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{case: "bereishit 1:1 — what is created first?"}))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)

      assert conn.status == 200
      body = Jason.decode!(conn.resp_body)
      assert body["deliberation"]["outcome"] == "teiku"
      assert body["deliberation"]["panel_size"] == 1
      # the one judge abstained: an abstaining majority of one, no dissent
      assert body["deliberation"]["majority"]["votes"] == 1
      assert body["deliberation"]["majority"]["reasoning"] =~ "no consultation"
      assert body["deliberation"]["minority"]["votes"] == 0
    end

    # Tablet 55: with a consultation behind the judges, the dialectic
    # decides — interpret resolved, challenge finds a kushya, resolve
    # resolved → 2 accept, 1 reject; the minority preserved with its verse.
    test "POST /chatzer/sanhedrin monetary panel splits 2–1 from the dialectic" do
      Application.put_env(:sanhedrin, :consult, {__MODULE__, :fake_consult})
      write_provision(2)

      try do
        conn =
          conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{
            case: "devarim 6:4 — is the unity declared or commanded?",
            complexity_hint: "monetary"
          }))
          |> put_req_header("content-type", "application/json")
          |> put_req_header("authorization", "Bearer chatzer-test-token")
          |> Router.call(@opts)

        assert conn.status == 200
        d = Jason.decode!(conn.resp_body)["deliberation"]
        assert d["panel_size"] == 3
        assert d["outcome"] == "accepted"
        assert d["majority"]["votes"] == 2
        assert d["majority"]["position"] == "the reading"
        assert d["majority"]["sources"] == ["bereishit 1:1"]
        assert d["minority"]["votes"] == 1
        assert d["minority"]["position"] == "but the verse says otherwise"
        assert d["minority"]["sources"] == ["devarim 6:4"]
      after
        Application.put_env(:sanhedrin, :consult, {VavPipeline.SanhedrinConsult, :consult})
      end
    end

    # Devarim 17:9 — the decision is engraved in L3: an interpretation row
    # with the panel and the votes, and the minority beside it.
    @tag :l3
    test "POST /chatzer/sanhedrin engraves the decision and the minority in L3" do
      # The record is written from the request process (the router), so a
      # checkout here covers it; the sandbox is shared for the sake of the
      # panel's processes, which do not touch the Repo.
      :ok = Ecto.Adapters.SQL.Sandbox.checkout(VavPipeline.Repo)
      Ecto.Adapters.SQL.Sandbox.mode(VavPipeline.Repo, {:shared, self()})
      on_exit(fn -> Ecto.Adapters.SQL.Sandbox.mode(VavPipeline.Repo, :manual) end)
      Application.put_env(:sanhedrin, :consult, {__MODULE__, :fake_consult})
      write_provision(2)

      try do
        before = VavPipeline.L3.Store.count_interpretations()
        before_min = VavPipeline.L3.Store.count_minority_opinions()

        conn =
          conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{case: "devarim 6:4", complexity_hint: "monetary"}))
          |> put_req_header("content-type", "application/json")
          |> put_req_header("authorization", "Bearer chatzer-test-token")
          |> Router.call(@opts)

        assert conn.status == 200
        body = Jason.decode!(conn.resp_body)
        assert body["grounding"]["recorded"]["l3"] == "recorded"
        assert VavPipeline.L3.Store.count_interpretations() == before + 1
        assert VavPipeline.L3.Store.count_minority_opinions() == before_min + 1
      after
        Application.put_env(:sanhedrin, :consult, {VavPipeline.SanhedrinConsult, :consult})
      end
    end

    # A panel is manna (Vayakhel §3.7): the day's sanhedrin_panels_max spent → 503.
    test "POST /chatzer/sanhedrin with the day's panels spent returns 503 MANNA_DEPLETED" do
      write_provision(1)
      body = Jason.encode!(%{case: "bereishit 1:1"})

      post = fn ->
        conn(:post, "/chatzer/sanhedrin", body)
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)
      end

      assert post.().status == 200
      second = post.()
      assert second.status == 503
      assert Jason.decode!(second.resp_body)["error"]["code"] == "MANNA_DEPLETED"
    end

    test "POST /chatzer/sanhedrin with an unknown complexity_hint returns 422" do
      conn =
        conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{case: "x", complexity_hint: "cosmic"}))
        |> put_req_header("content-type", "application/json")
        |> put_req_header("authorization", "Bearer chatzer-test-token")
        |> Router.call(@opts)

      assert conn.status == 422
      assert Jason.decode!(conn.resp_body)["error"]["guidance"]["issue"] =~ "complexity_hint"
    end

    test "POST /chatzer/sanhedrin with malformed sides returns 422, not 500" do
      for bad <- ["not a list", [%{"no_position" => 1}], [%{"position" => "p", "evidence" => "not a list"}]] do
        conn =
          conn(:post, "/chatzer/sanhedrin", Jason.encode!(%{case: "x", sides: bad}))
          |> put_req_header("content-type", "application/json")
          |> put_req_header("authorization", "Bearer chatzer-test-token")
          |> Router.call(@opts)

        assert conn.status == 422, "expected 422 for sides=#{inspect(bad)}, got #{conn.status}"
        assert Jason.decode!(conn.resp_body)["error"]["code"] == "KIYOR_VALIDATION_FAILED"
      end
    end
  end

  # ============================================================
  # Kodesh — Operator Endpoint
  # ============================================================
  describe "Kodesh endpoint" do
    test "GET /kodesh/health returns health check" do
      conn =
        conn(:get, "/kodesh/health")
        |> Router.call(@opts)

      assert conn.status in [200, 503]

      body = Jason.decode!(conn.resp_body)
      assert Map.has_key?(body, "overall")
      assert Map.has_key?(body, "checks")
      assert body["overall"] in ["healthy", "degraded", "critical", "shabbat"]

      # Required health checks
      assert Map.has_key?(body["checks"], "l1_hash")
      assert Map.has_key?(body["checks"], "halt_monitor_alive")
      assert Map.has_key?(body["checks"], "esh_tamid")
    end

    test "GET /kodesh/status returns system status" do
      conn =
        conn(:get, "/kodesh/status")
        |> Router.call(@opts)

      assert conn.status == 200

      body = Jason.decode!(conn.resp_body)
      assert Map.has_key?(body, "cloud_state")
      assert Map.has_key?(body, "components")
      assert Map.has_key?(body, "halt_status")
      assert Map.has_key?(body, "signal_count")
    end
  end

  # ============================================================
  # Error handling — Chatat protocol
  # ============================================================
  describe "error handling" do
    test "unknown endpoint returns 404" do
      conn =
        conn(:get, "/unknown/path")
        |> Router.call(@opts)

      assert conn.status == 404
      body = Jason.decode!(conn.resp_body)
      assert body["error"]["code"] == "NOT_FOUND"
    end

    test "all errors follow chatat format" do
      conn =
        conn(:post, "/peah/ask", Jason.encode!(%{}))
        |> put_req_header("content-type", "application/json")
        |> Router.call(@opts)

      assert conn.status == 422
      body = Jason.decode!(conn.resp_body)

      # Chatat format: error.code, error.type, error.message, error.guidance
      assert Map.has_key?(body["error"], "code")
      assert Map.has_key?(body["error"], "type")
      assert Map.has_key?(body["error"], "message")
      assert Map.has_key?(body["error"], "guidance")
    end

    test "all responses are JSON" do
      conn =
        conn(:get, "/kodesh/health")
        |> Router.call(@opts)

      content_type = get_resp_header(conn, "content-type")
      assert Enum.any?(content_type, &String.contains?(&1, "application/json"))
    end
  end
end