import { describe, expect, it, vi } from "vitest";
import { AssistantService } from "../src/services/assistantService";
import { AssistantSessionStore } from "../src/services/assistantSessionStore";

function buildAddressLaneResult(overrides?: Record<string, unknown>): any {
  return {
    handled: true,
    reply_text: "Собран список документов по контрагенту.",
    reply_type: "factual",
    response_type: "FACTUAL_LIST",
    debug: {
      detected_mode: "address_query",
      detected_mode_confidence: "high",
      query_shape: "DOCUMENT_LIST",
      query_shape_confidence: "medium",
      detected_intent: "list_documents_by_counterparty",
      detected_intent_confidence: "medium",
      extracted_filters: {
        sort: "period_desc",
        limit: 20,
        counterparty: "свк"
      },
      missing_required_filters: [],
      selected_recipe: "address_documents_by_counterparty_v1",
      mcp_call_status_legacy: "matched_non_empty",
      account_scope_mode: "preferred",
      account_scope_fallback_applied: false,
      anchor_type: "counterparty",
      anchor_value_raw: "свк",
      anchor_value_resolved: "Группа СВК",
      resolver_confidence: "medium",
      ambiguity_count: 0,
      match_failure_stage: "none",
      match_failure_reason: null,
      mcp_call_status: "matched_non_empty",
      rows_fetched: 20,
      raw_rows_received: 20,
      rows_after_account_scope: 5,
      rows_after_recipe_filter: 3,
      rows_materialized: 5,
      rows_matched: 3,
      raw_row_keys_sample: [],
      materialization_drop_reason: "none",
      account_token_raw: null,
      account_token_normalized: null,
      account_scope_fields_checked: ["account_dt", "account_kt", "registrator", "analytics"],
      account_scope_match_strategy: "account_code_regex_plus_alias_map_v1",
      account_scope_drop_reason: "not_applicable",
      runtime_readiness: "LIVE_QUERYABLE_WITH_LIMITS",
      limited_reason_category: null,
      response_type: "FACTUAL_LIST",
      limitations: [],
      reasons: ["address_action_detected", "address_entity_detected"]
    },
    ...(overrides ?? {})
  };
}

describe("assistant address follow-up carryover", () => {
  it("keeps short follow-up in address lane by reusing previous anchor context", async () => {
    const calls: Array<{ message: string; options?: any }> = [];
    const addressQueryService = {
      tryHandle: vi.fn(async (message: string, options?: any) => {
        calls.push({ message, options });
        if (message === "а за все время?" && !options?.followupContext) {
          return null;
        }
        if (message === "а за все время?" && options?.followupContext) {
          return buildAddressLaneResult({
            reply_text: "Собран список документов по контрагенту за все время.",
            debug: {
              ...buildAddressLaneResult().debug,
              reasons: ["address_action_detected", "address_entity_detected", "address_followup_context_applied"]
            }
          });
        }
        return buildAddressLaneResult();
      })
    } as any;

    const normalizerService = {
      normalize: vi.fn(async () => ({
        assistant_reply: "normalizer_fallback_should_not_be_used",
        reply_type: "partial_coverage",
        debug: {}
      }))
    } as any;

    const sessions = new AssistantSessionStore();
    const service = new AssistantService(
      normalizerService,
      sessions as any,
      {} as any,
      { persistSession: vi.fn() } as any,
      addressQueryService
    );

    const sessionId = `asst-address-followup-${Date.now()}`;
    const first = await service.handleMessage({
      session_id: sessionId,
      user_message: "покажи документы по свк за 2020",
      useMock: true
    } as any);
    expect(first.ok).toBe(true);
    expect(first.reply_type).toBe("factual");

    const second = await service.handleMessage({
      session_id: sessionId,
      user_message: "а за все время?",
      useMock: true
    } as any);

    expect(second.ok).toBe(true);
    expect(second.reply_type).toBe("factual");
    expect(second.debug?.detected_mode).toBe("address_query");
    expect(second.debug?.detected_intent).toBe("list_documents_by_counterparty");
    expect(second.debug?.extracted_filters?.counterparty).toBe("свк");
    expect(second.debug?.answer_grounding_check?.reasons).toContain("address_followup_context_applied");

    expect(calls).toHaveLength(2);
    expect(calls[0].message.toLowerCase()).toContain("свк");
    expect(calls[1].message).toBe("а за все время?");
    expect(calls[1].options?.followupContext?.previous_intent).toBe("list_documents_by_counterparty");
    expect(calls[1].options?.followupContext?.previous_anchor_type).toBe("counterparty");
    expect(calls[1].options?.followupContext?.previous_anchor_value).toBe("Группа СВК");
    expect(calls[1].options?.followupContext?.previous_filters?.counterparty).toBe("свк");
    expect(normalizerService.normalize).not.toHaveBeenCalled();
  });

  it("treats short 'по <anchor> также' phrase as follow-up for address lane", async () => {
    const calls: Array<{ message: string; options?: any }> = [];
    const firstMessage = "\u043f\u043e\u043a\u0430\u0436\u0438 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u044b \u043f\u043e \u0441\u0432\u043a \u0437\u0430 2020";
    const followupMessage = "\u043f\u043e \u0441\u0432\u043a \u0442\u0430\u043a\u0436\u0435 \u043f\u043b\u0438\u0437";

    const addressQueryService = {
      tryHandle: vi.fn(async (message: string, options?: any) => {
        calls.push({ message, options });
        if (message === followupMessage && !options?.followupContext) {
          return null;
        }
        if (message === followupMessage && options?.followupContext) {
          return buildAddressLaneResult({
            debug: {
              ...buildAddressLaneResult().debug,
              reasons: ["address_action_detected", "address_entity_detected", "address_followup_context_applied"]
            }
          });
        }
        return buildAddressLaneResult();
      })
    } as any;

    const normalizerService = {
      normalize: vi.fn(async () => ({
        assistant_reply: "normalizer_fallback_should_not_be_used",
        reply_type: "partial_coverage",
        debug: {}
      }))
    } as any;

    const sessions = new AssistantSessionStore();
    const service = new AssistantService(
      normalizerService,
      sessions as any,
      {} as any,
      { persistSession: vi.fn() } as any,
      addressQueryService
    );

    const sessionId = `asst-address-followup-short-${Date.now()}`;
    const first = await service.handleMessage({
      session_id: sessionId,
      user_message: firstMessage,
      useMock: true
    } as any);
    expect(first.ok).toBe(true);
    expect(first.reply_type).toBe("factual");

    const second = await service.handleMessage({
      session_id: sessionId,
      user_message: followupMessage,
      useMock: true
    } as any);

    expect(second.ok).toBe(true);
    expect(second.reply_type).toBe("factual");
    expect(calls).toHaveLength(2);
    expect(calls[1].message).toBe(followupMessage);
    expect(calls[1].options?.followupContext?.previous_intent).toBe("list_documents_by_counterparty");
    expect(calls[1].options?.followupContext?.previous_anchor_type).toBe("counterparty");
    expect(typeof calls[1].options?.followupContext?.previous_anchor_value).toBe("string");
    expect(String(calls[1].options?.followupContext?.previous_anchor_value ?? "").length).toBeGreaterThan(0);
    expect(normalizerService.normalize).not.toHaveBeenCalled();
  });
});