// Migrate Hermes tests cover model.apply plugin behavior.
import path from "node:path";
import type { OpenClawConfig } from "openclaw/plugin-sdk/provider-auth";
import {
  resolvePreferredOpenClawTmpDir,
  tempWorkspace,
  type TempWorkspace,
} from "openclaw/plugin-sdk/temp-path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import {
  HERMES_REASON_DEFAULT_MODEL_CONFIGURED,
  HERMES_REASON_MODEL_PROVIDER_CONFLICT,
} from "./items.js";
import { buildHermesMigrationProvider } from "./provider.js";
import { makeConfigRuntime, makeContext, writeFile } from "./test/provider-helpers.js";

let testWorkspace: TempWorkspace;

function defaultModelItem(status: "migrated" | "conflict") {
  return {
    id: "config:default-model",
    kind: "config",
    action: "update",
    target: "agents.defaults.model",
    status,
    ...(status === "conflict" ? { reason: HERMES_REASON_DEFAULT_MODEL_CONFIGURED } : {}),
    details: { model: "openai/gpt-5.4" },
  };
}

describe("Hermes migration model apply", () => {
  beforeEach(async () => {
    testWorkspace = await tempWorkspace({
      rootDir: resolvePreferredOpenClawTmpDir(),
      prefix: "openclaw-migrate-hermes-",
    });
  });

  afterEach(async () => {
    await testWorkspace.cleanup();
  });

  it("updates only the primary model when applying over object-form model config", async () => {
    const root = testWorkspace.dir;
    const source = path.join(root, "hermes");
    const workspaceDir = path.join(root, "workspace");
    const stateDir = path.join(root, "state");
    const reportDir = path.join(root, "report");
    await writeFile(
      path.join(source, "config.yaml"),
      "model:\n  provider: openai\n  model: gpt-5.4\n",
    );
    const existingConfig = {
      agents: {
        defaults: {
          workspace: workspaceDir,
          model: {
            primary: "anthropic/claude-sonnet-4.6",
            fallbacks: ["openrouter/anthropic/claude-opus-4.6"],
            timeoutMs: 120_000,
          },
        },
      },
    } as OpenClawConfig;
    let writtenConfig: OpenClawConfig | undefined;
    const provider = buildHermesMigrationProvider({
      runtime: makeConfigRuntime(existingConfig, (next) => {
        writtenConfig = next;
      }),
    });

    const result = await provider.apply(
      makeContext({
        source,
        stateDir,
        workspaceDir,
        overwrite: true,
        model: existingConfig.agents?.defaults?.model,
        reportDir,
      }),
    );

    expect(result.items).toEqual([defaultModelItem("migrated")]);
    expect(writtenConfig?.agents?.defaults?.model).toEqual({
      primary: "openai/gpt-5.4",
      fallbacks: ["openrouter/anthropic/claude-opus-4.6"],
      timeoutMs: 120_000,
    });
  });

  it("updates the default-agent model override when applying with overwrite", async () => {
    const root = testWorkspace.dir;
    const source = path.join(root, "hermes");
    const workspaceDir = path.join(root, "workspace");
    const stateDir = path.join(root, "state");
    const reportDir = path.join(root, "report");
    await writeFile(
      path.join(source, "config.yaml"),
      "model:\n  provider: openai\n  model: gpt-5.4\n",
    );
    const existingConfig = {
      agents: {
        defaults: {
          workspace: workspaceDir,
          model: {
            primary: "google/gemini-3-pro",
            fallbacks: ["openai/gpt-5.4"],
          },
        },
        list: [
          {
            id: "main",
            default: true,
            model: {
              primary: "anthropic/claude-sonnet-4.6",
              fallbacks: ["openrouter/anthropic/claude-opus-4.6"],
            },
          },
        ],
      },
    } as OpenClawConfig;
    let writtenConfig: OpenClawConfig | undefined;
    const provider = buildHermesMigrationProvider({
      runtime: makeConfigRuntime(existingConfig, (next) => {
        writtenConfig = next;
      }),
    });

    const result = await provider.apply(
      makeContext({
        source,
        stateDir,
        workspaceDir,
        config: existingConfig,
        overwrite: true,
        reportDir,
      }),
    );

    expect(result.items).toEqual([defaultModelItem("migrated")]);
    expect(writtenConfig?.agents?.list?.[0]?.model).toEqual({
      primary: "openai/gpt-5.4",
      fallbacks: ["openrouter/anthropic/claude-opus-4.6"],
    });
    expect(writtenConfig?.agents?.defaults?.model).toEqual(existingConfig.agents?.defaults?.model);
  });

  it("reports late-created default models as conflicts without overwriting", async () => {
    const root = testWorkspace.dir;
    const source = path.join(root, "hermes");
    const workspaceDir = path.join(root, "workspace");
    const stateDir = path.join(root, "state");
    const reportDir = path.join(root, "report");
    await writeFile(
      path.join(source, "config.yaml"),
      "model:\n  provider: openai\n  model: gpt-5.4\n",
    );
    const lateConfig = {
      agents: {
        defaults: {
          workspace: workspaceDir,
          model: "anthropic/claude-sonnet-4.6",
        },
      },
    } as OpenClawConfig;
    const provider = buildHermesMigrationProvider({
      runtime: makeConfigRuntime(lateConfig),
    });
    const ctx = makeContext({ source, stateDir, workspaceDir, reportDir });
    const plan = await provider.plan(ctx);

    const result = await provider.apply(ctx, plan);

    expect(result.items).toEqual([defaultModelItem("conflict")]);
    expect(result.summary.conflicts).toBe(1);
    expect(lateConfig.agents?.defaults?.model).toBe("anthropic/claude-sonnet-4.6");
  });

  it("does not apply a custom default after its provider develops a late conflict", async () => {
    const root = testWorkspace.dir;
    const source = path.join(root, "hermes");
    const workspaceDir = path.join(root, "workspace");
    const stateDir = path.join(root, "state");
    const reportDir = path.join(root, "report");
    await writeFile(
      path.join(source, "config.yaml"),
      [
        "model:",
        "  provider: custom:acme",
        "  default: imported-model",
        "providers:",
        "  acme:",
        "    base_url: https://new.example.test/v1",
        "    transport: openai_chat",
        "",
      ].join("\n"),
    );
    const lateConfig = {
      agents: { defaults: { workspace: workspaceDir } },
      models: {
        providers: {
          acme: {
            baseUrl: "https://old.example.test/v1",
            api: "openai-completions",
            models: [],
          },
        },
      },
    } as OpenClawConfig;
    const provider = buildHermesMigrationProvider({ runtime: makeConfigRuntime(lateConfig) });
    const ctx = makeContext({ source, stateDir, workspaceDir, reportDir });
    const plan = await provider.plan(ctx);

    const result = await provider.apply(ctx, plan);

    expect(result.items.find((item) => item.id === "config:model-provider:acme")?.status).toBe(
      "conflict",
    );
    expect(result.items.find((item) => item.id === "config:default-model")).toEqual(
      expect.objectContaining({
        status: "conflict",
        reason: HERMES_REASON_MODEL_PROVIDER_CONFLICT,
      }),
    );
    expect(lateConfig.agents?.defaults?.model).toBeUndefined();
  });
});