import { exec, execFile } from "node:child_process";
import { mkdtemp, readFile, readdir, rm, writeFile } from "node:fs/promises";
import { createRequire } from "node:module";
import path from "node:path";
import { tmpdir } from "node:os";
import { promisify } from "node:util";
import { afterEach, describe, expect, it } from "vitest";
import { scaffoldPluginDirectory } from "./scaffold.js";

const directories: string[] = [];
const execFileAsync = promisify(execFile);
const execAsync = promisify(exec);
const tscPath = createRequire(import.meta.url).resolve("typescript/bin/tsc");

async function typecheckPlugin(directory: string): Promise<void> {
  const configPath = path.join(directory, "tsconfig.json");
  try {
    await execFileAsync(process.execPath, [tscPath, "--noEmit", "-p", configPath], {
      cwd: directory,
    });
  } catch (error) {
    const failure = error as { stderr?: string; stdout?: string };
    throw new Error(`${failure.stdout ?? ""}${failure.stderr ?? ""}`, { cause: error });
  }
}

afterEach(async () => {
  await Promise.all(directories.splice(0).map((directory) => rm(directory, { recursive: true })));
});

describe("plugin scaffold", () => {
  it("creates an author overview beside the manifest", async () => {
    const parent = await mkdtemp(path.join(tmpdir(), "paseo-plugin-scaffold-"));
    directories.push(parent);
    const directory = path.join(parent, "hello-plugin");
    await scaffoldPluginDirectory(directory);

    const overview = await readFile(path.join(directory, "OVERVIEW.md"), "utf8");
    const comments = overview.match(/<!--[\s\S]*?-->/g) ?? [];
    expect(comments).toHaveLength(1);
    expect(overview.replace(/<!--[\s\S]*?-->/g, "").trim()).toBe("");
    expect(overview).toContain("required to list");
    expect(overview).toContain("README");
    expect(overview).toContain("choosing a plugin in Paseo");
    expect(overview).toContain("Length follows complexity");
    expect(overview).toContain("1. Describe what your plugin is and does");
    expect(overview).toContain("2. Explain how it works only when it is not obvious");
    expect(overview).toContain("3. Explain setup when needed");
    expect(overview).toContain("4. Explain capabilities and settings");
    expect(overview).toContain("permissions");
    expect(overview).toContain("known limits");
    expect(overview).not.toContain("This plugin entry was imported");
    const packageJson = JSON.parse(await readFile(path.join(directory, "package.json"), "utf8"));
    expect(packageJson.files).toContain("OVERVIEW.md");
    expect(await readdir(directory)).toContain("paseo-plugin.json");
  });

  it("includes the author overview in the packed npm artifact", async () => {
    const parent = await mkdtemp(path.join(tmpdir(), "paseo-plugin-scaffold-"));
    directories.push(parent);
    const directory = path.join(parent, "packed-plugin");
    await scaffoldPluginDirectory(directory);

    const { stdout } = await execAsync("npm pack --dry-run --ignore-scripts --json", {
      cwd: directory,
    });
    const [artifact] = JSON.parse(stdout) as { files: { path: string }[] }[];
    expect(artifact.files.map((file) => file.path)).toEqual(
      expect.arrayContaining(["OVERVIEW.md", "paseo-plugin.json"]),
    );
  });

  it(
    "creates a standalone split-runtime project that typechecks",
    { timeout: 15_000 },
    async () => {
      const parent = await mkdtemp(path.join(process.cwd(), ".plugin-scaffold-"));
      directories.push(parent);
      const directory = path.join(parent, "hello-plugin");

      await scaffoldPluginDirectory(directory);

      const configPath = path.join(directory, "tsconfig.json");
      const config = JSON.parse(await readFile(configPath, "utf8")) as {
        compilerOptions: { lib: string[]; types: string[] };
      };
      expect(config.compilerOptions.lib).toEqual(["ES2023"]);
      expect(config.compilerOptions.types).toEqual(["react"]);
      await expect(typecheckPlugin(directory)).resolves.toBeUndefined();
      const cliPackageJson = JSON.parse(
        await readFile(new URL("../../../package.json", import.meta.url), "utf8"),
      ) as { version: string };
      expect(JSON.parse(await readFile(path.join(directory, "paseo-plugin.json"), "utf8"))).toEqual(
        {
          id: "hello-plugin",
          $comment: expect.stringContaining('"icon": "assets/icon.png"'),
          media: [],
          requirements: { paseo: `>=${cliPackageJson.version}` },
        },
      );
      expect(JSON.parse(await readFile(path.join(directory, "package.json"), "utf8"))).toEqual({
        name: "hello-plugin",
        private: true,
        version: "0.0.0",
        files: [
          "paseo-plugin.json",
          "OVERVIEW.md",
          "index.client.ts",
          "index.client.tsx",
          "index.server.ts",
          "index.server.tsx",
          "client/",
          "server/",
          "shared/",
        ],
        scripts: { typecheck: "tsc --noEmit" },
        devDependencies: {
          "@getpaseo/plugin": cliPackageJson.version,
          "@tanstack/react-query": "^5.90.11",
          "@types/react": "~19.2.0",
          react: "19.1.0",
          "react-native": "0.81.5",
          typescript: "^5.9.3",
          zod: "^4.4.3",
        },
      });
      expect(await readdir(directory)).not.toContain("paseo-plugin.d.ts");
      await expect(readFile(path.join(directory, "index.client.tsx"), "utf8")).resolves.toContain(
        'from "./client/greeting"',
      );
      await expect(readFile(path.join(directory, "index.server.ts"), "utf8")).resolves.toContain(
        'from "./server/greeting"',
      );
      await expect(
        readFile(path.join(directory, "client/greeting.tsx"), "utf8"),
      ).resolves.toContain("useRpc(greetingRpc)");
      await expect(readFile(path.join(directory, "client/web.ts"), "utf8")).resolves.not.toContain(
        `/// <reference lib="dom" />`,
      );
      await expect(readFile(path.join(directory, "client/web.ts"), "utf8")).resolves.toContain(
        `declare const window: { open(url: string, target: string, features: string): unknown };`,
      );
      await expect(readFile(path.join(directory, "client/web.ts"), "utf8")).resolves.toContain(
        `Platform.OS === "web"`,
      );
      await expect(
        readFile(path.join(directory, "client/greeting.tsx"), "utf8"),
      ).resolves.toContain(`openExternal("https://paseo.sh")`);
      await expect(readFile(path.join(directory, "server/greeting.ts"), "utf8")).resolves.toContain(
        '"Hello, " + name + "!"',
      );
      await expect(readFile(path.join(directory, "shared/greeting.ts"), "utf8")).resolves.toContain(
        'name: "greeting.create"',
      );

      await writeFile(path.join(directory, "client/greeting.tsx"), '\ndocument.title = "x";\n', {
        flag: "a",
      });
      await expect(typecheckPlugin(directory)).rejects.toThrow("Cannot find name 'document'.");
    },
  );

  it("typechecks client and server Paseo API access", async () => {
    const parent = await mkdtemp(path.join(process.cwd(), ".plugin-scaffold-"));
    directories.push(parent);
    const directory = path.join(parent, "paseo-api-plugin");
    await scaffoldPluginDirectory(directory);
    await Promise.all([
      writeFile(
        path.join(directory, "shared", "inspect.ts"),
        `import { defineRpc } from "@getpaseo/plugin";
import { z } from "zod";

export const inspect = defineRpc({
  name: "inspect",
  input: z.object({}),
  output: z.object({ configured: z.boolean() }),
});
`,
      ),
      writeFile(
        path.join(directory, "server", "inspect.ts"),
        `import type { PluginHandlerContext } from "@getpaseo/plugin/server";
import type { RpcInput } from "@getpaseo/plugin";
import { inspect } from "../shared/inspect";

export async function inspectConfig(
  _input: RpcInput<typeof inspect>,
  { paseo }: PluginHandlerContext,
) {
  return { configured: Boolean((await paseo.config.get()).config) };
}
`,
      ),
      writeFile(
        path.join(directory, "client", "main.tsx"),
        `import React from "react";
import { Text } from "react-native";
import { Icon, Modal, useToast } from "@getpaseo/plugin/client/react-native";
import { type PluginAgentPanelProps, type PluginClientContext, type PluginSurfaceProps, useAgent, usePaseo, useWorkspace } from "@getpaseo/plugin/client";
import { inspect } from "../shared/inspect";

export function Surface({ navigation }: PluginSurfaceProps) {
  const paseo = usePaseo();
  const toast = useToast();
  const createWorkspace = () => paseo.workspaces.create({
    source: { kind: "directory", path: "/repo" },
  });
  navigation?.openAgent({ agentId: "agent-1" });
  navigation?.openWorkspace({ workspaceId: "workspace-1" });
  navigation?.openAgent({ serverId: "server-2", agentId: "agent-2" });
  navigation?.openWorkspace({ serverId: "server-2", workspaceId: "workspace-2" });
  void createWorkspace;
  return <><Icon name="Settings" size={18} color="#123456" /><Text onPress={() => toast.show("Ready")}>Paseo API</Text><Modal title="Example" icon={<Icon name="Settings" />} open={false} onOpenChange={() => {}}><Modal.Content><Text>Modal</Text></Modal.Content></Modal></>;
}

export function AgentPanel({ workspaceId, agentId }: PluginAgentPanelProps) {
  const workspaceName = useWorkspace(workspaceId, (workspace) => {
    // @ts-expect-error Plugin snapshots are readonly.
    workspace.name = "mutated";
    return workspace.name;
  });
  const agentTitle = useAgent(agentId, (agent) => {
    // @ts-expect-error Nested plugin snapshot values are readonly.
    agent.labels.phase = "mutated";
    return agent.title;
  });
  return <Text>{workspaceName}: {agentTitle}</Text>;
}

export function contributeClient(client: PluginClientContext) {
  const header = client.addHeaderButton({
    id: "review-tools",
    workspaceId: "workspace-a",
    button: {
      title: "Review tools",
      icon: "Scan",
      label: "Review",
      behavior: {
        kind: "menu",
        items: [{ kind: "item", id: "refresh", title: "Refresh review", behavior: {
          kind: "action", async onPress() { await client.rpc(inspect, {}); },
        } }],
      },
    },
  });
  const pill = client.addComposerPill({
    id: "open-review",
    workspaceId: "workspace-a",
    agentId: "agent-a",
    button: {
      title: "Open review",
      icon: "Scan",
      behavior: {
        kind: "action",
        async onPress() {
          await client.rpc(inspect, {});
          client.openPanel("review", { workspaceId: "workspace-a", agentId: "agent-a" });
        },
      },
    },
  });
  header.update({ visible: false });
  pill.update({ disabled: true });
  return () => { header.remove(); pill.remove(); };
}
`,
      ),
      writeFile(
        path.join(directory, "index.client.tsx"),
        `import type { PluginClientContext } from "@getpaseo/plugin/client";
import { AgentPanel, contributeClient, Surface } from "./client/main";
import { inspect } from "./shared/inspect";

export default function contribute(client: PluginClientContext) {
  client.addScreen({ id: "main", title: "Review", Component: Surface });
  client.addWorkspacePanel({
    id: "review",
    title: "Review",
    icon: "Scan",
    context: "agent",
    Component: AgentPanel,
  });
  client.addCommandCenterItem({
    id: "open-review",
    title: "Open review",
    icon: "Scan",
    context: "agent",
    async onSelect({ paseo, rpc, workspace, openPanel }) {
      await paseo.workspaces.ref(workspace.id).setTitle("Review");
      await rpc(inspect, {});
      openPanel("review");
    },
  });
  return contributeClient(client);
}
`,
      ),
      writeFile(
        path.join(directory, "index.server.ts"),
        `import type { PluginServerContext } from "@getpaseo/plugin/server";
import { inspectConfig } from "./server/inspect";
import { inspect } from "./shared/inspect";

export default function contribute(server: PluginServerContext) {
  server.handle(inspect, inspectConfig);
  return () => {};
}
`,
      ),
    ]);

    await expect(typecheckPlugin(directory)).resolves.toBeUndefined();
  }, 20_000);

  it("reports TypeScript errors for the old composer pill shape and cleanup", async () => {
    const parent = await mkdtemp(path.join(process.cwd(), ".plugin-scaffold-"));
    directories.push(parent);
    const directory = path.join(parent, "old-composer-pill");
    await scaffoldPluginDirectory(directory);
    await writeFile(
      path.join(directory, "index.client.tsx"),
      `
import type { PluginClientContext, PluginComposerPillProps } from "@getpaseo/plugin/client";

export default function contribute(client: PluginClientContext) {
  const oldPill = {
    id: "review", workspaceId: "workspace-a", agentId: "agent-a",
    title: "Review", Component: () => null, onPress() {},
  };
  client.addComposerPill(oldPill);
  const pill = client.addComposerPill({
    id: "review", workspaceId: "workspace-a", agentId: "agent-a",
    button: { title: "Review", icon: "Scan", behavior: { kind: "action", onPress() {} } },
  });
  pill();
  return () => pill.remove();
}
`,
    );
    const check = typecheckPlugin(directory);
    await expect(check).rejects.toThrow(
      /has no exported member (named )?'PluginComposerPillProps'/,
    );
    await expect(check).rejects.toThrow("Property 'button' is missing");
    await expect(check).rejects.toThrow("has no call signatures");
  }, 20_000);

  it("refuses to write into a non-empty directory", async () => {
    const directory = await mkdtemp(path.join(tmpdir(), "paseo-plugin-scaffold-"));
    directories.push(directory);
    await writeFile(path.join(directory, "notes.txt"), "keep me");

    await expect(scaffoldPluginDirectory(directory, "hello-plugin")).rejects.toThrow(
      "Plugin directory must be empty",
    );
    expect(await readFile(path.join(directory, "notes.txt"), "utf8")).toBe("keep me");
  });
});