import { expect, it } from "vitest";
import type {
  ChannelAccountSnapshot,
  ChannelAccountState,
  ChannelSetupInput,
} from "../../../src/channels/plugins/types.core.js";
import type {
  ChannelMessageActionName,
  ChannelMessageCapability,
  ChannelPlugin,
} from "../../../src/channels/plugins/types.js";
import type { OpenClawConfig } from "../../../src/config/config.js";

function sortStrings(values: readonly string[]) {
  return [...values].toSorted((left, right) => left.localeCompare(right));
}

function resolveContractMessageDiscovery(params: {
  plugin: Pick<ChannelPlugin, "actions">;
  cfg: OpenClawConfig;
}) {
  const actions = params.plugin.actions;
  if (!actions) {
    return {
      actions: [] as ChannelMessageActionName[],
      capabilities: [] as readonly ChannelMessageCapability[],
    };
  }
  const discovery = actions.describeMessageTool({ cfg: params.cfg }) ?? null;
  return {
    actions: Array.isArray(discovery?.actions) ? [...discovery.actions] : [],
    capabilities: Array.isArray(discovery?.capabilities) ? discovery.capabilities : [],
  };
}

export function installChannelPluginContractSuite(params: {
  plugin: Pick<ChannelPlugin, "id" | "meta" | "capabilities" | "config">;
}) {
  it("satisfies the base channel plugin contract", () => {
    const { plugin } = params;

    expect(typeof plugin.id).toBe("string");
    expect(plugin.id.trim()).not.toBe("");

    expect(plugin.meta.id).toBe(plugin.id);
    expect(plugin.meta.label.trim()).not.toBe("");
    expect(plugin.meta.selectionLabel.trim()).not.toBe("");
    expect(plugin.meta.docsPath).toMatch(/^\/channels\//);
    expect(plugin.meta.blurb.trim()).not.toBe("");

    expect(plugin.capabilities.chatTypes.length).toBeGreaterThan(0);

    expect(typeof plugin.config.listAccountIds).toBe("function");
    expect(typeof plugin.config.resolveAccount).toBe("function");
  });
}

type ChannelActionsContractCase = {
  name: string;
  cfg: OpenClawConfig;
  expectedActions: readonly ChannelMessageActionName[];
  expectedCapabilities?: readonly ChannelMessageCapability[];
  beforeTest?: () => void;
};

export function installChannelActionsContractSuite(params: {
  plugin: Pick<ChannelPlugin, "id" | "actions">;
  cases: readonly ChannelActionsContractCase[];
  unsupportedAction?: ChannelMessageActionName;
}) {
  it("exposes the base message actions contract", () => {
    expect(params.plugin.actions).toBeDefined();
    expect(typeof params.plugin.actions?.describeMessageTool).toBe("function");
  });

  for (const testCase of params.cases) {
    it(`actions contract: ${testCase.name}`, () => {
      testCase.beforeTest?.();

      const discovery = resolveContractMessageDiscovery({
        plugin: params.plugin,
        cfg: testCase.cfg,
      });
      const actions = discovery.actions;
      const capabilities = discovery.capabilities;

      expect(actions).toEqual([...new Set(actions)]);
      expect(capabilities).toEqual([...new Set(capabilities)]);
      expect(sortStrings(actions)).toEqual(sortStrings(testCase.expectedActions));
      expect(sortStrings(capabilities)).toEqual(sortStrings(testCase.expectedCapabilities ?? []));

      if (params.plugin.actions?.supportsAction) {
        for (const action of testCase.expectedActions) {
          expect(params.plugin.actions.supportsAction({ action })).toBe(true);
        }
        if (
          params.unsupportedAction &&
          !testCase.expectedActions.includes(params.unsupportedAction)
        ) {
          expect(params.plugin.actions.supportsAction({ action: params.unsupportedAction })).toBe(
            false,
          );
        }
      }
    });
  }
}

type ChannelSetupContractCase<ResolvedAccount> = {
  name: string;
  cfg: OpenClawConfig;
  accountId?: string;
  input: ChannelSetupInput;
  expectedAccountId?: string;
  expectedValidation?: string | null;
  beforeTest?: () => void;
  assertPatchedConfig?: (cfg: OpenClawConfig) => void;
  assertResolvedAccount?: (account: ResolvedAccount, cfg: OpenClawConfig) => void;
};

export function installChannelSetupContractSuite<ResolvedAccount>(params: {
  plugin: Pick<ChannelPlugin<ResolvedAccount>, "id" | "config" | "setup">;
  cases: readonly ChannelSetupContractCase<ResolvedAccount>[];
}) {
  it("exposes the base setup contract", () => {
    expect(params.plugin.setup).toBeDefined();
    expect(typeof params.plugin.setup?.applyAccountConfig).toBe("function");
  });

  for (const testCase of params.cases) {
    it(`setup contract: ${testCase.name}`, () => {
      testCase.beforeTest?.();

      const resolvedAccountId =
        params.plugin.setup?.resolveAccountId?.({
          cfg: testCase.cfg,
          accountId: testCase.accountId,
          input: testCase.input,
        }) ??
        testCase.accountId ??
        "default";

      expect(resolvedAccountId).toBe(testCase.expectedAccountId ?? resolvedAccountId);

      const validation =
        params.plugin.setup?.validateInput?.({
          cfg: testCase.cfg,
          accountId: resolvedAccountId,
          input: testCase.input,
        }) ?? null;
      expect(validation).toBe(testCase.expectedValidation ?? null);

      const nextCfg = params.plugin.setup?.applyAccountConfig({
        cfg: testCase.cfg,
        accountId: resolvedAccountId,
        input: testCase.input,
      });
      expect(nextCfg).toBeDefined();

      const account = params.plugin.config.resolveAccount(nextCfg!, resolvedAccountId);
      testCase.assertPatchedConfig?.(nextCfg!);
      testCase.assertResolvedAccount?.(account, nextCfg!);
    });
  }
}

type ChannelStatusContractCase<Probe> = {
  name: string;
  cfg: OpenClawConfig;
  accountId?: string;
  runtime?: ChannelAccountSnapshot;
  probe?: Probe;
  beforeTest?: () => void;
  expectedState?: ChannelAccountState;
  resolveStateInput?: {
    configured: boolean;
    enabled: boolean;
  };
  assertSnapshot?: (snapshot: ChannelAccountSnapshot) => void;
  assertSummary?: (summary: Record<string, unknown>) => void;
};

export function installChannelStatusContractSuite<ResolvedAccount, Probe = unknown>(params: {
  plugin: Pick<ChannelPlugin<ResolvedAccount, Probe>, "id" | "config" | "status">;
  cases: readonly ChannelStatusContractCase<Probe>[];
}) {
  it("exposes the base status contract", () => {
    expect(params.plugin.status).toBeDefined();
    expect(typeof params.plugin.status?.buildAccountSnapshot).toBe("function");
  });

  if (params.plugin.status?.defaultRuntime) {
    it("status contract: default runtime is shaped like an account snapshot", () => {
      expect(typeof params.plugin.status?.defaultRuntime?.accountId).toBe("string");
    });
  }

  for (const testCase of params.cases) {
    it(`status contract: ${testCase.name}`, async () => {
      testCase.beforeTest?.();

      const account = params.plugin.config.resolveAccount(testCase.cfg, testCase.accountId);
      const snapshot = await params.plugin.status!.buildAccountSnapshot!({
        account,
        cfg: testCase.cfg,
        runtime: testCase.runtime,
        probe: testCase.probe,
      });

      expect(typeof snapshot.accountId).toBe("string");
      expect(snapshot.accountId.trim()).not.toBe("");
      testCase.assertSnapshot?.(snapshot);

      if (params.plugin.status?.buildChannelSummary) {
        const defaultAccountId =
          params.plugin.config.defaultAccountId?.(testCase.cfg) ?? testCase.accountId ?? "default";
        const summary = await params.plugin.status.buildChannelSummary({
          account,
          cfg: testCase.cfg,
          defaultAccountId,
          snapshot,
        });
        expect(summary).toEqual(expect.any(Object));
        testCase.assertSummary?.(summary);
      }

      if (testCase.expectedState && params.plugin.status?.resolveAccountState) {
        const state = params.plugin.status.resolveAccountState({
          account,
          cfg: testCase.cfg,
          configured: testCase.resolveStateInput?.configured ?? true,
          enabled: testCase.resolveStateInput?.enabled ?? true,
        });
        expect(state).toBe(testCase.expectedState);
      }
    });
  }
}