import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import test from "node:test";

import {
  optionIdForAnswerClass,
  parseRectificationTurnIntent,
  shouldContinueAgentForDatedEvent,
  shouldDeclineCollectFocus,
  collectFocusCloseStatus,
  expectedWriteFromCollectIntent,
  classifyTurnIntentWithRetry,
  turnIntentOutcome,
} from "../src/lib/rectification-agentic/v9/turn-intent-classifier.ts";
import { RECTIFICATION_USER_COPY } from "../src/lib/rectification-agentic/user-copy.ts";
import type { ResolvedLanguageModel } from "../src/mastra/model.ts";
import type { ConversationFocus } from "../src/lib/rectification-agentic/v9/tool-service.ts";
import { CASE_ID, FOCUS_ID } from "./rectification-v9-test-support.ts";

function focusWithOptions(expectedAnswerSchema: Record<string, unknown>): ConversationFocus {
  return {
    id: FOCUS_ID,
    caseId: CASE_ID,
    questionId: "question-1",
    intent: "distinguish_candidates",
    targetEvidenceId: null,
    targetDomain: "career",
    targetKind: "career_change",
    expectedAnswerSchema,
    status: "active",
    askedAt: "2026-08-27T00:00:00.000Z",
    resolvedAt: null,
  };
}

const SHUFFLED_CHOICE = {
  choice: {
    prompt: "2023 年前后，工作状态是否出现明显变化？",
    option_a: "这段时间没有明显变化",
    option_b: "记不清当时的情况",
    option_c: "变化明显而且时间吻合",
    option_d: "有变化但程度比较弱",
    options: [
      { key: "A", label: "这段时间没有明显变化", answer_class: "no" },
      { key: "B", label: "记不清当时的情况", answer_class: "unsure" },
      { key: "C", label: "变化明显而且时间吻合", answer_class: "yes" },
      { key: "D", label: "有变化但程度比较弱", answer_class: "weak_yes" },
    ],
  },
};

test("turn intent parser enforces answer_class only for current-focus answers", () => {
  assert.deepEqual(parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: "no",
  }), {
    intent: "answer_current_focus",
    answer_class: "no",
  });
  assert.deepEqual(parseRectificationTurnIntent({
    intent: "provide_new_evidence",
    answer_class: null,
  }), {
    intent: "provide_new_evidence",
    answer_class: null,
  });
  assert.equal(parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: null,
  }), null);
  assert.equal(parseRectificationTurnIntent({
    intent: "stop_rectification",
    answer_class: "no",
  }), null);
  assert.equal(parseRectificationTurnIntent({
    intent: "unclear",
    answer_class: null,
    extra: true,
  }), null);
});

test("missing has_new_dated_event is treated as false and true is fail-closed optional", () => {
  const legacy = parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: "no",
  });
  assert.equal(legacy?.intent, "answer_current_focus");
  assert.equal(legacy?.answer_class, "no");
  assert.equal(legacy?.has_new_dated_event, undefined);
  assert.equal(shouldContinueAgentForDatedEvent(legacy), false);
  assert.equal(shouldContinueAgentForDatedEvent(null), false);
  assert.equal(shouldContinueAgentForDatedEvent({
    intent: "answer_current_focus",
    answer_class: "no",
    has_new_dated_event: false,
  }), false);
  const withEvent = parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: "no",
    has_new_dated_event: true,
  });
  assert.equal(withEvent?.has_new_dated_event, true);
  assert.equal(shouldContinueAgentForDatedEvent(withEvent), true);
  assert.equal(shouldDeclineCollectFocus(withEvent), true);
  assert.equal(parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: "no",
    has_new_dated_event: "yes",
  }), null);
});

test("answer classes resolve through each dynamic option instead of A/B/C/D position", () => {
  const focus = focusWithOptions(SHUFFLED_CHOICE);
  assert.equal(optionIdForAnswerClass(focus, "no"), "A");
  assert.equal(optionIdForAnswerClass(focus, "unsure"), "B");
  assert.equal(optionIdForAnswerClass(focus, "yes"), "C");
  assert.equal(optionIdForAnswerClass(focus, "weak_yes"), "D");
});

test("missing or invalid dynamic choice schemas fail closed", () => {
  assert.equal(optionIdForAnswerClass(focusWithOptions({}), "no"), null);
  assert.equal(optionIdForAnswerClass(focusWithOptions({
    choice: {
      ...SHUFFLED_CHOICE.choice,
      options: SHUFFLED_CHOICE.choice.options.map(({ key, label }) => ({ key, label })),
    },
  }), "no"), null);
});

test("production intent handling contains no semantic regex or positional text parser", () => {
  const route = readFileSync(new URL("../src/app/api/rectification/agent/route.ts", import.meta.url), "utf8");
  const classifier = readFileSync(new URL("../src/lib/rectification-agentic/v9/turn-intent-classifier.ts", import.meta.url), "utf8");
  const choiceCard = readFileSync(new URL("../src/lib/rectification-agentic/v9/choice-card.ts", import.meta.url), "utf8");
  const inference = readFileSync(new URL("../src/lib/rectification-agentic/v9/inference-adapter.ts", import.meta.url), "utf8");
  const source = [route, classifier, choiceCard, inference].join("\n");
  const fastPath = route.slice(
    route.indexOf('if (action === "message")'),
    route.indexOf("const requestTime"),
  );
  assert.doesNotMatch(source, /USER_STOP_PATTERN|parseChoiceKeyFromUserMessage/);
  assert.doesNotMatch(classifier + fastPath, /\.test\([^\n]*(?:userMessage|user_message|message)/);
  assert.doesNotMatch(classifier + fastPath, /(?:userMessage|user_message|message)\.(?:match|search|includes|startsWith|endsWith)\(/);
  assert.ok(route.indexOf("classifyRectificationTurnIntent") < route.indexOf("runV9AgentTurn({"));
  assert.ok(route.indexOf("persistServerOwnedFocus") < route.indexOf("runV9AgentTurn({"));
  assert.ok(fastPath.includes("ask_candidate_discriminator"));
  assert.doesNotMatch(fastPath, /目前没有可继续区分/);
  assert.match(route, /nonConvergingRangeNarration/);
  assert.match(fastPath, /persistNextInterviewIfIdle/);
  assert.match(fastPath, /!plan\.next_followup/);
  assert.doesNotMatch(route, /classified\.answer_class!/);
  assert.match(route, /classifyTurnIntentWithRetry/);
  assert.match(route, /expectedWrite,/);
  assert.equal(expectedWriteFromCollectIntent({
    intent: "provide_new_evidence",
    answer_class: null,
  }), "evidence");
  assert.equal(expectedWriteFromCollectIntent({
    intent: "answer_current_focus",
    answer_class: "yes",
    has_new_dated_event: true,
  }), "evidence");
  assert.equal(expectedWriteFromCollectIntent({
    intent: "answer_current_focus",
    answer_class: "no",
  }), "none");
  assert.equal(expectedWriteFromCollectIntent(null), "none");
  assert.doesNotMatch(route, /isCollectDeclineUtterance|isCollectSkipUtterance/);
  assert.doesNotMatch(classifier, /isCollectDeclineUtterance|isCollectSkipUtterance/);
  assert.match(classifier, /没有、没发生过、这方面没什么/);
  assert.match(classifier, /记不清、不记得、忘了、想不起来、以后再说/);
  assert.match(classifier, /answer_class 为 unsure/);
  assert.match(classifier, /answer_class 为 yes/);
  assert.match(route, /collectFocusCloseStatus/);
  assert.match(route, /collectIntent/);
});

test("collect focus close-status and expectedWrite map classifier classes", () => {
  assert.equal(collectFocusCloseStatus({
    intent: "answer_current_focus",
    answer_class: "no",
  }), "declined");
  assert.equal(collectFocusCloseStatus({
    intent: "answer_current_focus",
    answer_class: "unsure",
  }), "skipped");
  assert.equal(collectFocusCloseStatus({
    intent: "answer_current_focus",
    answer_class: "yes",
  }), null);
  assert.equal(collectFocusCloseStatus({
    intent: "provide_new_evidence",
    answer_class: null,
  }), null);
  const collectFocus = focusWithOptions({
    collect: true,
    prompt: "钱的方面，还记得哪年收入明显变过吗？",
  });
  assert.equal(expectedWriteFromCollectIntent({
    intent: "answer_current_focus",
    answer_class: "yes",
  }, collectFocus), "evidence");
  assert.equal(expectedWriteFromCollectIntent({
    intent: "answer_current_focus",
    answer_class: "weak_yes",
  }, collectFocus), "evidence");
  assert.equal(expectedWriteFromCollectIntent({
    intent: "answer_current_focus",
    answer_class: "yes",
  }), "none");
  assert.deepEqual(parseRectificationTurnIntent({
    intent: "provide_new_evidence",
    answer_class: null,
  }), {
    intent: "provide_new_evidence",
    answer_class: null,
  });
  const noPlusEvent = parseRectificationTurnIntent({
    intent: "answer_current_focus",
    answer_class: "no",
    has_new_dated_event: true,
  });
  assert.equal(noPlusEvent?.answer_class, "no");
  assert.equal(noPlusEvent?.has_new_dated_event, true);
});

test("classifyTurnIntentWithRetry fails open as unknown after two misses", () => {
  const src = readFileSync(
    new URL("../src/lib/rectification-agentic/v9/turn-intent-classifier.ts", import.meta.url),
    "utf8",
  );
  assert.match(src, /export async function classifyTurnIntentWithRetry/);
  assert.match(src, /for \(let attempt = 0; attempt < 2/);
  assert.match(src, /expectedWrite: "unknown"/);
  assert.match(src, /outcome: "classifier_unavailable"/);
  assert.doesNotMatch(src, /\(\?:19\|20\)\\d\{2\}/);
});

const dummyModel = { id: "test-model" } as ResolvedLanguageModel;

test("two classifier throws are classifier_unavailable, not unclear", async () => {
  let calls = 0;
  const warnings: unknown[] = [];
  const original = console.warn;
  console.warn = (...args: unknown[]) => {
    warnings.push(args);
  };
  try {
    const result = await classifyTurnIntentWithRetry(
      dummyModel,
      { userMessage: "2016年3月入学", caseStatus: "collecting_evidence" },
      async () => {
        calls += 1;
        throw Object.assign(new Error("upstream 5xx"), { name: "APICallError" });
      },
    );
    assert.equal(calls, 2);
    assert.equal(result.classified, null);
    assert.equal(result.expectedWrite, "unknown");
    assert.equal(result.outcome, "classifier_unavailable");
    assert.equal(turnIntentOutcome(null), "classifier_unavailable");
    const line = JSON.stringify(warnings[0]);
    assert.match(line, /rectification_classifier_unavailable/);
    assert.match(line, /elapsedMs/);
    assert.doesNotMatch(line, /2016|入学|userMessage/);
  } finally {
    console.warn = original;
  }
});

test("a model unclear intent is outcome unclear and uses a different reply than unavailable", async () => {
  const result = await classifyTurnIntentWithRetry(
    dummyModel,
    { userMessage: "随便吧", caseStatus: "collecting_evidence" },
    async () => ({ intent: "unclear", answer_class: null }),
  );
  assert.equal(result.outcome, "unclear");
  assert.equal(result.classified?.intent, "unclear");
  assert.equal(result.expectedWrite, "none");
  assert.equal(turnIntentOutcome({ intent: "unclear", answer_class: null }), "unclear");
  assert.notEqual(
    RECTIFICATION_USER_COPY.classifierUnavailableReply,
    RECTIFICATION_USER_COPY.unclearFocusReply,
  );
  assert.match(RECTIFICATION_USER_COPY.classifierUnavailableReply, /再发一次/);
  assert.match(RECTIFICATION_USER_COPY.unclearFocusReply, /不太确定/);
});

test("route no longer merges classifier null with user-unclear", () => {
  const route = readFileSync(new URL("../src/app/api/rectification/agent/route.ts", import.meta.url), "utf8");
  assert.doesNotMatch(route, /!classified \|\| classified\.intent === "unclear"/);
  assert.match(route, /outcome === "classifier_unavailable"/);
  assert.match(route, /outcome === "unclear"/);
  assert.match(route, /classifierUnavailableReply/);
  const unavailableAt = route.indexOf('outcome === "classifier_unavailable"');
  const unclearAt = route.indexOf('outcome === "unclear"');
  assert.ok(unavailableAt >= 0 && unclearAt > unavailableAt);
  const unavailableBlock = route.slice(unavailableAt, unclearAt);
  assert.match(unavailableBlock, /classifierUnavailableReply/);
  assert.doesNotMatch(unavailableBlock, /applyRectificationChoice/);
  assert.doesNotMatch(unavailableBlock, /authorizeUsage/);
  assert.doesNotMatch(unavailableBlock, /record-evidence-batch|recordV10EvidenceBatch/);
});