import { describe, it } from "node:test";
import assert from "node:assert/strict";

const mod = await import("../../open-sse/services/reasoningCache.ts");

describe("reasoningCache helpers", () => {
  describe("isDeepSeekReasoningModel", () => {
    it("returns true for deepseek-v4 models with thinking enabled", () => {
      assert.equal(
        mod.isDeepSeekReasoningModel({
          provider: "deepseek",
          model: "deepseek-v4-flash",
          thinkingEnabled: true,
        }),
        true
      );
      assert.equal(
        mod.isDeepSeekReasoningModel({
          provider: "deepseek",
          model: "deepseek/v4-pro",
          thinkingEnabled: true,
        }),
        true
      );
    });

    it("returns false without thinkingEnabled", () => {
      assert.equal(
        mod.isDeepSeekReasoningModel({ provider: "deepseek", model: "deepseek-v4-flash" }),
        false
      );
      assert.equal(
        mod.isDeepSeekReasoningModel({
          provider: "deepseek",
          model: "deepseek-v4-flash",
          thinkingEnabled: false,
        }),
        false
      );
    });

    it("returns false for non-v4 models", () => {
      assert.equal(
        mod.isDeepSeekReasoningModel({
          provider: "deepseek",
          model: "deepseek-chat",
          thinkingEnabled: true,
        }),
        false
      );
    });
  });

  describe("requiresReasoningReplay", () => {
    it("returns true for reasoning_content interleaved field", () => {
      assert.equal(
        mod.requiresReasoningReplay({
          provider: "any",
          model: "any",
          interleavedField: "reasoning_content",
        }),
        true
      );
    });

    it("returns false for reasoning_details interleaved field", () => {
      assert.equal(
        mod.requiresReasoningReplay({
          provider: "any",
          model: "any",
          interleavedField: "reasoning_details",
        }),
        false
      );
    });

    it("returns false for deepseek-reasoner", () => {
      assert.equal(
        mod.requiresReasoningReplay({ provider: "deepseek", model: "deepseek-reasoner" }),
        false
      );
    });

    it("returns false for deepseek-r1", () => {
      assert.equal(
        mod.requiresReasoningReplay({ provider: "deepseek", model: "deepseek-r1" }),
        false
      );
    });

    it("returns true for DeepSeek V4 thinking models", () => {
      assert.equal(
        mod.requiresReasoningReplay({
          provider: "deepseek",
          model: "deepseek-v4-flash",
          thinkingEnabled: true,
        }),
        true
      );
    });

    it("returns true for known replay providers", () => {
      assert.equal(
        mod.requiresReasoningReplay({ provider: "deepseek", model: "some-model" }),
        true
      );
    });

    it("returns true for Kimi Coding providers regardless of model alias", () => {
      assert.equal(mod.requiresReasoningReplay({ provider: "kimi-coding", model: "k3" }), true);
      assert.equal(
        mod.requiresReasoningReplay({ provider: "kimi-coding-apikey", model: "kimi-k2.6" }),
        true
      );
    });

    it("detects native Kimi thinking model IDs without matching unrelated aliases", () => {
      for (const model of [
        "kimi-k2",
        "kimi-k2.6",
        "kimi-k2.6-thinking",
        "kimi-k2.7-code",
        "kimi-k2.7-code-highspeed",
        "moonshotai/kimi-k2.7-code",
      ]) {
        assert.equal(mod.requiresReasoningReplay({ provider: "some-other", model }), true, model);
      }

      for (const model of ["k3", "moonshot-v1-8k", "kimi-latest"]) {
        assert.equal(mod.requiresReasoningReplay({ provider: "some-other", model }), false, model);
      }
    });

    it("returns false when allowLegacyFallback is false and no explicit signal", () => {
      assert.equal(
        mod.requiresReasoningReplay({
          provider: "unknown",
          model: "unknown",
          allowLegacyFallback: false,
        }),
        false
      );
    });
  });

  describe("cache operations", () => {
    it("getReasoningCacheServiceStats returns expected shape", () => {
      const stats = mod.getReasoningCacheServiceStats();
      assert.equal(typeof stats.hits, "number");
      assert.equal(typeof stats.misses, "number");
      assert.equal(typeof stats.replays, "number");
      assert.equal(typeof stats.memoryEntries, "number");
    });

    it("clearReasoningCacheAll returns a number", () => {
      const cleared = mod.clearReasoningCacheAll();
      assert.equal(typeof cleared, "number");
    });

    it("lookupReasoning returns null for unknown key", () => {
      const result = mod.lookupReasoning("nonexistent-key-" + Date.now());
      assert.equal(result, null);
    });

    it("deleteReasoningCacheEntry returns 0 for unknown key", () => {
      const result = mod.deleteReasoningCacheEntry("nonexistent-" + Date.now());
      assert.equal(result, 0);
    });

    it("cleanupReasoningCache returns a number", () => {
      const cleaned = mod.cleanupReasoningCache();
      assert.equal(typeof cleaned, "number");
    });
  });
});