import fs from "node:fs";
import path from "node:path";
import type { OpenClawConfig } from "openclaw/plugin-sdk/config-runtime";
import { describe, expect, it } from "vitest";
import { withTempHome } from "../../../test/helpers/temp-home.js";
import { autoMigrateLegacyMatrixState, detectLegacyMatrixState } from "./legacy-state.js";

function writeFile(filePath: string, value: string) {
  fs.mkdirSync(path.dirname(filePath), { recursive: true });
  fs.writeFileSync(filePath, value, "utf-8");
}

describe("matrix legacy state migration", () => {
  it("migrates the flat legacy Matrix store into account-scoped storage", async () => {
    await withTempHome(async (home) => {
      const stateDir = path.join(home, ".openclaw");
      writeFile(path.join(stateDir, "matrix", "bot-storage.json"), '{"next_batch":"s1"}');
      writeFile(path.join(stateDir, "matrix", "crypto", "store.db"), "crypto");

      const cfg: OpenClawConfig = {
        channels: {
          matrix: {
            homeserver: "https://matrix.example.org",
            userId: "@bot:example.org",
            accessToken: "tok-123",
          },
        },
      };

      const detection = detectLegacyMatrixState({ cfg, env: process.env });
      expect(detection && "warning" in detection).toBe(false);
      if (!detection || "warning" in detection) {
        throw new Error("expected a migratable Matrix legacy state plan");
      }

      const result = await autoMigrateLegacyMatrixState({ cfg, env: process.env });
      expect(result.migrated).toBe(true);
      expect(result.warnings).toEqual([]);
      expect(fs.existsSync(path.join(stateDir, "matrix", "bot-storage.json"))).toBe(false);
      expect(fs.existsSync(path.join(stateDir, "matrix", "crypto"))).toBe(false);
      expect(fs.existsSync(detection.targetStoragePath)).toBe(true);
      expect(fs.existsSync(path.join(detection.targetCryptoPath, "store.db"))).toBe(true);
    });
  });

  it("uses cached Matrix credentials when the config no longer stores an access token", async () => {
    await withTempHome(async (home) => {
      const stateDir = path.join(home, ".openclaw");
      writeFile(path.join(stateDir, "matrix", "bot-storage.json"), '{"next_batch":"s1"}');
      writeFile(
        path.join(stateDir, "credentials", "matrix", "credentials.json"),
        JSON.stringify(
          {
            homeserver: "https://matrix.example.org",
            userId: "@bot:example.org",
            accessToken: "tok-from-cache",
          },
          null,
          2,
        ),
      );

      const cfg: OpenClawConfig = {
        channels: {
          matrix: {
            homeserver: "https://matrix.example.org",
            userId: "@bot:example.org",
            password: "secret",
          },
        },
      };

      const detection = detectLegacyMatrixState({ cfg, env: process.env });
      expect(detection && "warning" in detection).toBe(false);
      if (!detection || "warning" in detection) {
        throw new Error("expected cached credentials to make Matrix migration resolvable");
      }

      expect(detection.targetRootDir).toContain("matrix.example.org__bot_example.org");

      const result = await autoMigrateLegacyMatrixState({ cfg, env: process.env });
      expect(result.migrated).toBe(true);
      expect(fs.existsSync(detection.targetStoragePath)).toBe(true);
    });
  });
});