import { expect, test } from "vitest";
import * as workspaceSchema from "../src/workspaces/schema.js";
import {
  parseWorkspaceYaml,
  serializeWorkspaceYaml,
  validateCanonicalWorkspace,
  type WorkspaceDescriptor,
} from "../src/workspaces/schema.js";

export const validYaml = `workspace:
  schema_version: 3
  id: psd-clinical
  name: Policlinico San Donato
  description: Clinical data warehouse workspace
  language: it
dwh:
  engine: postgres
  database: postgres
  schema: datawarehouse
  port: 5432
  timeout_ms: 5000
  supported_transports:
    - postgres_direct
    - rest_api
    - ssh_tunnel
semantic_index:
  vector_store:
    engine: qdrant
    collection: psd-clinical
    dimensions: 1024
    distance: cosine
  embedding:
    provider: ollama_internal
    model: qwen3-embedding:0.6b
    dimensions: 1024
llm_policy:
  default: zai/glm-5.2
  allowed:
    - zai/glm-5.2
    - openai/gpt-5
`;

test("rejects a workspace whose embedding dimensions differ from its collection", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("dimensions: 1024", "dimensions: 1536")))
    .toThrow(/dimensions/i);
});

test("rejects an LLM default outside its allowlist", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("- zai/glm-5.2", "- openai/gpt-5")))
    .toThrow(/allowlist/i);
});

test("rejects unknown keys and invalid immutable IDs", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("  language: it", "  language: it\n  label: PSD")))
    .toThrow(/unrecognized key/i);
  expect(() => parseWorkspaceYaml(validYaml.replace("id: psd-clinical", "id: PSD")))
    .toThrow(/id/i);
});

test("rejects executable or otherwise custom YAML tags in canonical descriptors", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace(
    "name: Policlinico San Donato",
    "name: !command echo-never-execute",
  ))).toThrow(/tag|yaml/i);
});

test("accepts optional connection ports and timeouts but rejects unsafe values", () => {
  expect(parseWorkspaceYaml(validYaml).dwh.port).toBe(5432);
  expect(() => parseWorkspaceYaml(validYaml.replace("port: 5432", "port: 0")))
    .toThrow(/port/i);
  expect(() => parseWorkspaceYaml(validYaml.replace("port: 5432", "port: 65536")))
    .toThrow(/port/i);
  expect(() => parseWorkspaceYaml(validYaml.replace("timeout_ms: 5000", "timeout_ms: 0")))
    .toThrow(/timeout/i);
  expect(() => parseWorkspaceYaml(validYaml.replace("dimensions: 1024", "dimensions: 2048")))
    .toThrow(/1024|dimensions/i);
});

test("accepts only the schema v3 internal qdrant semantic shape", () => {
  expect(parseWorkspaceYaml(validYaml)).toMatchObject({
    workspace: { schema_version: 3, id: "psd-clinical" },
    semantic_index: {
      vector_store: {
        engine: "qdrant",
        collection: "psd-clinical",
        dimensions: 1024,
        distance: "cosine",
      },
      embedding: {
        provider: "ollama_internal",
        model: "qwen3-embedding:0.6b",
        dimensions: 1024,
      },
    },
  });
});

test("rejects pgvector semantic stores in schema v3", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("engine: qdrant", "engine: pgvector")))
    .toThrow(/qdrant|pgvector/i);
});

test("rejects supported_transports inside schema v3 semantic identity", () => {
  const withTransport = validYaml.replace(
    "    distance: cosine\n",
    "    distance: cosine\n    supported_transports:\n      - rest_api\n",
  );

  expect(() => parseWorkspaceYaml(withTransport)).toThrow(/unrecognized key|supported_transports/i);
});

test("rejects external embedding providers in schema v3", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("provider: ollama_internal", "provider: openai_compatible")))
    .toThrow(/ollama_internal|provider/i);
});

test("rejects non-cosine distance in schema v3", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace("distance: cosine", "distance: l2")))
    .toThrow(/cosine|distance/i);
});

test("rejects unknown fields in schema v3 semantic identity", () => {
  const withUnknownField = validYaml.replace(
    "    collection: psd-clinical\n",
    "    collection: psd-clinical\n    namespace: psd\n",
  );

  expect(() => parseWorkspaceYaml(withUnknownField)).toThrow(/unrecognized key/i);
});

test("rejects legacy semantic connector fields and diagnostics in schema v3", () => {
  expect(() => parseWorkspaceYaml(validYaml.replace(
    "    collection: psd-clinical\n",
    "    collection: psd-clinical\n    database: postgres\n",
  ))).toThrow(/unrecognized key|database/i);

  expect(() => parseWorkspaceYaml(validYaml.replace(
    "llm_policy:\n",
    "diagnostics:\n  vector_rest:\n    metadata:\n      method: GET\n      path: /metadata\n      auth: bearer\n      response:\n        collection: collection\n        dimensions: dimensions\n        distance: distance\nllm_policy:\n",
  ))).toThrow(/unrecognized key|vector_rest/i);
});

test("keeps v1 and v2 descriptors parseable but non-operational", () => {
  const v1Yaml = `workspace:
  schema_version: 1
  id: psd-clinical
  name: Policlinico San Donato
  language: it
dwh:
  engine: postgres
  database: postgres
  schema: datawarehouse
  supported_transports:
    - postgres_direct
semantic_index:
  vector_store:
    engine: pgvector
    collection: clinical_documents
    dimensions: 1024
    distance: cosine
    supported_transports:
      - pgvector_direct
  embedding:
    provider: ollama_compatible
    model: nomic-embed-text-v2-moe
    dimensions: 1024
llm_policy:
  allowed:
    - zai/glm-5.2
`;
  const v2Yaml = `workspace:
  schema_version: 2
  id: psd-clinical
  name: Policlinico San Donato
  language: it
dwh:
  engine: postgres
  database: postgres
  schema: datawarehouse
  supported_transports:
    - postgres_direct
semantic_index:
  vector_store:
    engine: pgvector
    database: postgres
    schema: vectors
    collection: clinical_documents
    dimensions: 1024
    distance: cosine
    supported_transports:
      - pgvector_direct
  embedding:
    provider: ollama_compatible
    model: nomic-embed-text-v2-moe
    dimensions: 1024
llm_policy:
  allowed:
    - zai/glm-5.2
`;

  const v1 = parseWorkspaceYaml(v1Yaml);
  const v2 = parseWorkspaceYaml(v2Yaml);
  const isOperationalWorkspace = (workspaceSchema as { isOperationalWorkspace?: unknown }).isOperationalWorkspace;

  expect(v1.workspace.schema_version).toBe(1);
  expect(v2.workspace.schema_version).toBe(2);
  expect(validateCanonicalWorkspace(parseWorkspaceYaml(validYaml))).toMatchObject({
    workspace: { schema_version: 3 },
  });
  expect(() => validateCanonicalWorkspace(v1)).toThrow(/schema version 3|migration/i);
  expect(() => validateCanonicalWorkspace(v2)).toThrow(/schema version 3|migration/i);
  expect(isOperationalWorkspace).toBeTypeOf("function");
  expect((isOperationalWorkspace as (workspace: WorkspaceDescriptor) => boolean)(v1)).toBe(false);
  expect((isOperationalWorkspace as (workspace: WorkspaceDescriptor) => boolean)(v2)).toBe(false);
});

test("constructs diagnostic URLs only when the resolved URL remains on the service origin", () => {
  const resolveDiagnosticUrl = (workspaceSchema as { resolveDiagnosticUrl?: unknown }).resolveDiagnosticUrl;

  expect(resolveDiagnosticUrl).toBeTypeOf("function");
  expect((resolveDiagnosticUrl as (baseUrl: string, path: string) => URL)("https://service.example/base", "/rpc/ping"))
    .toMatchObject({ href: "https://service.example/rpc/ping" });
  expect(() => (resolveDiagnosticUrl as (baseUrl: string, path: string) => URL)(
    "https://service.example/base", "//diagnostic.invalid/rpc",
  )).toThrow(/origin/i);
});

test("rejects REST diagnostic declarations without their matching connector transport", () => {
  const diagnostics = `diagnostics:
  dwh_rest:
    method: POST
    path: /rpc/ping
    auth: bearer
    response:
      database: database
      schema: schema
llm_policy:
`;
  const declared = validYaml.replace("llm_policy:\n", diagnostics);

  expect(() => parseWorkspaceYaml(declared.replace("    - rest_api\n", ""))).toThrow(/dwh_rest/i);
});

test("serializes canonical YAML that parses back to the same workspace", () => {
  const workspace = parseWorkspaceYaml(validYaml);
  const serialized = serializeWorkspaceYaml(workspace);

  expect(serializeWorkspaceYaml(parseWorkspaceYaml(serialized))).toBe(serialized);
  expect(parseWorkspaceYaml(serialized)).toEqual(workspace);
});