import * as child_process from "node:child_process";
import * as path from "node:path";
import * as Protocol from "vscode-languageserver-protocol";
import * as Types from "vscode-languageserver-types";
import { URI } from "vscode-uri";
import * as LanguageServer from "./../src/LanguageServer";

const createWorkspaces = (names: string[]) => {
  const createSingleWorkspace = (name: string) => {
    const workspacePath = path.join(__dirname, name);
    const uri = LanguageServer.toURI(workspacePath);
    const folder: Protocol.WorkspaceFolder = { name, uri };
    return {
      name,
      path: workspacePath,
      uri,
      folder,
    };
  };

  const workspaces = names.map(createSingleWorkspace);

  const toTestResult = (
    symbol: Types.SymbolInformation | Types.WorkspaceSymbol,
  ) => {
    const location = Types.Location.is(symbol.location)
      ? `${symbol.location.range.start.line}:${symbol.location.range.start.character} ${symbol.location.range.end.line}:${symbol.location.range.end.character}`
      : "";

    return `${symbol.name} ${symbol.kind} ${workspaces.reduce(
      (acc, { path: workspacePath, name: workspaceName }) => {
        const uri = symbol.location.uri;
        const fsPath = URI.parse(uri).fsPath;
        if (!fsPath.includes(workspaceName)) return acc;
        return URI.file(
          path.relative(path.resolve(workspacePath, ".."), fsPath),
        ).path;
      },
      "",
    )} ${location}`;
  };

  return {
    workspaces,
    toTestResult,
  };
};

const buildProject = (cwd: string): void => {
  child_process.execSync("dune build --root . @check", { cwd: cwd });
};

describe("workspace/symbol", () => {
  let languageServer: LanguageServer.LanguageServer;

  const {
    workspaces: [workspaceA, workspaceB],
    toTestResult,
  } = createWorkspaces(["workspace_symbol_A", "workspace_symbol_B"]);

  afterEach(async () => {
    await LanguageServer.exit(languageServer);
  });

  async function queryWorkspaceSymbol(params: Protocol.WorkspaceSymbolParams) {
    return (
      (await languageServer.sendRequest(
        Protocol.WorkspaceSymbolRequest.type,
        params,
      )) ?? []
    );
  }

  it("returns all symbols from workspace", async () => {
    languageServer = await LanguageServer.startAndInitialize({
      workspaceFolders: [workspaceA.folder],
    });

    buildProject(workspaceA.path);

    const symbols = await queryWorkspaceSymbol({
      query: "",
    });

    expect(symbols.map(toTestResult)).toMatchInlineSnapshot(`
[
  "stack_of_ints 5 /workspace_symbol_A/bin/a.ml 51:0 65:5",
  "size 6 /workspace_symbol_A/bin/a.ml 64:11 64:15",
  "peek 6 /workspace_symbol_A/bin/a.ml 62:11 62:15",
  "pop 6 /workspace_symbol_A/bin/a.ml 57:11 57:14",
  "push 6 /workspace_symbol_A/bin/a.ml 55:11 55:15",
  "the_list 12 /workspace_symbol_A/bin/a.ml 53:16 53:24",
  "Foo 9 /workspace_symbol_A/bin/a.ml 49:0 49:23",
  "Increment 2 /workspace_symbol_A/bin/a.ml 45:0 47:3",
  "increment_x 12 /workspace_symbol_A/bin/a.ml 46:2 46:27",
  "X_int 2 /workspace_symbol_A/bin/a.ml 41:0 43:3",
  "x 12 /workspace_symbol_A/bin/a.ml 42:2 42:13",
  "A_Mod 2 /workspace_symbol_A/bin/a.ml 29:0 39:3",
  "compare 12 /workspace_symbol_A/bin/a.ml 38:2 38:30",
  "private_mod_fn 12 /workspace_symbol_A/bin/a.ml 36:2 36:33",
  "t 15 /workspace_symbol_A/bin/a.ml 34:2 34:14",
  "My_string 2 /workspace_symbol_A/bin/a.ml 27:0 27:25",
  "StringMap 2 /workspace_symbol_A/bin/a.ml 26:0 26:36",
  "a_i 12 /workspace_symbol_A/bin/a.ml 22:0 24:7",
  "a_arr 12 /workspace_symbol_A/bin/a.ml 18:0 18:14",
  "a_u 12 /workspace_symbol_A/bin/a.ml 16:0 16:15",
  "user 15 /workspace_symbol_A/bin/a.ml 12:0 14:12",
  "NotAdmin 9 /workspace_symbol_A/bin/a.ml 14:2 14:12",
  "Admin 9 /workspace_symbol_A/bin/a.ml 13:2 13:9",
  "a_d 12 /workspace_symbol_A/bin/a.ml 7:0 10:14",
  "A_B 2 /workspace_symbol_A/bin/a.ml 2:0 5:3",
  "a_b 12 /workspace_symbol_A/bin/a.ml 4:2 4:19",
  "a_b_t 15 /workspace_symbol_A/bin/a.ml 3:2 3:21",
  "a_x 12 /workspace_symbol_A/bin/a.ml 0:0 0:11",
  "main_y 12 /workspace_symbol_A/bin/main.ml 0:0 0:22",
  "vendored_x 12 /workspace_symbol_A/lib/lib.ml 14:0 14:31",
  "lib_private_fn 12 /workspace_symbol_A/lib/lib.ml 10:0 10:38",
  "hd 12 /workspace_symbol_A/lib/lib.ml 8:0 8:16",
  "lib_x 12 /workspace_symbol_A/lib/lib.ml 6:0 6:14",
  "user 15 /workspace_symbol_A/lib/lib.ml 3:0 5:1",
  "name 7 /workspace_symbol_A/lib/lib.ml 4:2 4:14",
  "t 15 /workspace_symbol_A/lib/LibTypes.mli 0:0 0:15",
  "x 12 /workspace_symbol_A/vendor/vendored_lib.ml 0:0 0:9",
]
`);
  });

  it("returns filtered symbols from workspace", async () => {
    languageServer = await LanguageServer.startAndInitialize({
      workspaceFolders: [workspaceA.folder],
    });

    buildProject(workspaceA.path);

    const symbols = await queryWorkspaceSymbol({
      query: "a_",
    });

    expect(symbols.map(toTestResult)).toMatchInlineSnapshot(`
[
  "a_i 12 /workspace_symbol_A/bin/a.ml 22:0 24:7",
  "a_arr 12 /workspace_symbol_A/bin/a.ml 18:0 18:14",
  "a_u 12 /workspace_symbol_A/bin/a.ml 16:0 16:15",
  "a_d 12 /workspace_symbol_A/bin/a.ml 7:0 10:14",
  "a_b 12 /workspace_symbol_A/bin/a.ml 4:2 4:19",
  "a_b_t 15 /workspace_symbol_A/bin/a.ml 3:2 3:21",
  "a_x 12 /workspace_symbol_A/bin/a.ml 0:0 0:11",
]
`);
  });

  it("handles mutiple wokspaces", async () => {
    languageServer = await LanguageServer.startAndInitialize({
      workspaceFolders: [workspaceA.folder, workspaceB.folder],
    });

    buildProject(workspaceA.path);
    buildProject(workspaceB.path);

    const symbols = await queryWorkspaceSymbol({
      query: "",
    });
    /* FIXME: symbol lib_type from lib.ml is missing */
    expect(symbols.map(toTestResult)).toMatchInlineSnapshot(`
[
  "stack_of_ints 5 /workspace_symbol_A/bin/a.ml 51:0 65:5",
  "size 6 /workspace_symbol_A/bin/a.ml 64:11 64:15",
  "peek 6 /workspace_symbol_A/bin/a.ml 62:11 62:15",
  "pop 6 /workspace_symbol_A/bin/a.ml 57:11 57:14",
  "push 6 /workspace_symbol_A/bin/a.ml 55:11 55:15",
  "the_list 12 /workspace_symbol_A/bin/a.ml 53:16 53:24",
  "Foo 9 /workspace_symbol_A/bin/a.ml 49:0 49:23",
  "Increment 2 /workspace_symbol_A/bin/a.ml 45:0 47:3",
  "increment_x 12 /workspace_symbol_A/bin/a.ml 46:2 46:27",
  "X_int 2 /workspace_symbol_A/bin/a.ml 41:0 43:3",
  "x 12 /workspace_symbol_A/bin/a.ml 42:2 42:13",
  "A_Mod 2 /workspace_symbol_A/bin/a.ml 29:0 39:3",
  "compare 12 /workspace_symbol_A/bin/a.ml 38:2 38:30",
  "private_mod_fn 12 /workspace_symbol_A/bin/a.ml 36:2 36:33",
  "t 15 /workspace_symbol_A/bin/a.ml 34:2 34:14",
  "My_string 2 /workspace_symbol_A/bin/a.ml 27:0 27:25",
  "StringMap 2 /workspace_symbol_A/bin/a.ml 26:0 26:36",
  "a_i 12 /workspace_symbol_A/bin/a.ml 22:0 24:7",
  "a_arr 12 /workspace_symbol_A/bin/a.ml 18:0 18:14",
  "a_u 12 /workspace_symbol_A/bin/a.ml 16:0 16:15",
  "user 15 /workspace_symbol_A/bin/a.ml 12:0 14:12",
  "NotAdmin 9 /workspace_symbol_A/bin/a.ml 14:2 14:12",
  "Admin 9 /workspace_symbol_A/bin/a.ml 13:2 13:9",
  "a_d 12 /workspace_symbol_A/bin/a.ml 7:0 10:14",
  "A_B 2 /workspace_symbol_A/bin/a.ml 2:0 5:3",
  "a_b 12 /workspace_symbol_A/bin/a.ml 4:2 4:19",
  "a_b_t 15 /workspace_symbol_A/bin/a.ml 3:2 3:21",
  "a_x 12 /workspace_symbol_A/bin/a.ml 0:0 0:11",
  "main_y 12 /workspace_symbol_A/bin/main.ml 0:0 0:22",
  "vendored_x 12 /workspace_symbol_A/lib/lib.ml 14:0 14:31",
  "lib_private_fn 12 /workspace_symbol_A/lib/lib.ml 10:0 10:38",
  "hd 12 /workspace_symbol_A/lib/lib.ml 8:0 8:16",
  "lib_x 12 /workspace_symbol_A/lib/lib.ml 6:0 6:14",
  "user 15 /workspace_symbol_A/lib/lib.ml 3:0 5:1",
  "name 7 /workspace_symbol_A/lib/lib.ml 4:2 4:14",
  "t 15 /workspace_symbol_A/lib/LibTypes.mli 0:0 0:15",
  "x 12 /workspace_symbol_A/vendor/vendored_lib.ml 0:0 0:9",
  "workspace_B 12 /workspace_symbol_B/main.ml 0:0 0:31",
]
`);
  });

  it("shows a notification message if no build directory found", async () => {
    languageServer = await LanguageServer.startAndInitialize({
      workspaceFolders: [workspaceA.folder, workspaceB.folder],
    });

    child_process.execSync("dune clean", { cwd: workspaceA.path });
    child_process.execSync("dune clean", { cwd: workspaceB.path });

    type StarNotificationHandlerParams =
      Parameters<Protocol.StarNotificationHandler>;
    const receivedNotification: Promise<{
      method: StarNotificationHandlerParams[0];
      params: StarNotificationHandlerParams[1];
    }> = new Promise((resolve, _reject) =>
      languageServer.onNotification((method, params) =>
        resolve({ method, params }),
      ),
    );

    await queryWorkspaceSymbol({
      query: "",
    });

    const notification = await receivedNotification;
    expect(notification.method).toBe(
      Protocol.ShowMessageNotification.type.method,
    );
    // @ts-ignore
    expect(notification.params.type).toEqual(Protocol.MessageType.Warning);
    // @ts-ignore
    expect(notification.params.message).toBe(
      `No build directory found in workspace(s): ${workspaceA.name}, ${workspaceB.name}`,
    );
  });
});