import assert from "node:assert/strict";
import { existsSync, readFileSync, realpathSync } from "node:fs";
import { join, resolve } from "node:path";
import test from "node:test";
import { Agent } from "@mastra/core/agent";
import { sharedConsultationMethodMarkdown } from "../src/lib/consultation-methodology.ts";
import {
  BOUND_METHOD_MARKER,
  jyotishSkillBinding,
  jyotishSkillBoundProcessor,
  jyotishSkillMethodBlock,
  jyotishSkillMethodCoreBlock,
  jyotishSkillPackage,
  jyotishSkillRuntimePath,
} from "../src/mastra/skill-binding.ts";

const model = { specificationVersion: "v2", provider: "probe", modelId: "probe" } as never;

function probeAgent(options: Record<string, unknown>) {
  return new Agent({ id: "skill-binding-probe", name: "Probe", model, instructions: "x", ...options } as never);
}

function liveSkillBody() {
  const live = readFileSync(resolve(jyotishSkillPackage.resolvedPath, "SKILL.md"), "utf8");
  return live.slice(live.indexOf("---", 3) + 4).trim();
}

function boundMethodText() {
  const opened = jyotishSkillMethodBlock.indexOf(`<jyotish-skill name="${jyotishSkillPackage.name}"`);
  const closed = jyotishSkillMethodBlock.lastIndexOf("</jyotish-skill>");
  assert.ok(opened >= 0 && closed > opened);
  return jyotishSkillMethodBlock.slice(jyotishSkillMethodBlock.indexOf("\n", opened) + 1, closed).trim();
}

test("the method the model follows is the live skill, not a hashed snapshot", () => {
  const body = liveSkillBody();
  const bound = boundMethodText();

  assert.match(jyotishSkillMethodBlock, new RegExp(`name="${jyotishSkillPackage.name}"`));
  assert.doesNotMatch(jyotishSkillMethodBlock, /<jyotish-skill name="[^"]+" version="/);
  for (const line of bound.split("\n")) {
    if (line.length === 0) continue;
    assert.ok(body.includes(line), line.slice(0, 80));
  }
  assert.ok(jyotishSkillRuntimePath.endsWith(jyotishSkillPackage.name));
  assert.equal(jyotishSkillRuntimePath.includes("/versions/"), false);
  assert.equal(existsSync(join(jyotishSkillRuntimePath, "versions")), false);
  assert.equal(
    realpathSync(join(jyotishSkillRuntimePath, "SKILL.md")),
    realpathSync(join(jyotishSkillPackage.resolvedPath, "SKILL.md")),
  );
});

test("the bound method is the runtime excerpt, not the maintainer manual", () => {
  // Independent source: the commercial SKILL.md still contains both the
  // answering contract and the repo-construction notes. Binding the whole
  // file is what pushed Mastra past its 500-line warning; the excerpt keeps
  // the contract and drops the notes.
  const body = liveSkillBody();
  const bound = boundMethodText();

  for (const heading of ["商业运行时路由", "关联技法完整调取", "强制工作流", "五层硬约束", "核心方法论", "注意事项", "commercial_skill_truth_overlay"]) {
    assert.ok(body.includes(heading), heading);
    assert.ok(bound.includes(heading), heading);
  }
  for (const phrase of ["全谱系真实调用", "P0/P1 观察层", "网页对话的技法审计表由界面折叠展示", "静态分析10步"]) {
    assert.ok(bound.includes(phrase), phrase);
  }
  for (const heading of ["施工判断原则", "冲顶路线", "37大子命令", "验证与错题体系", "开源复用边界冻结"]) {
    assert.ok(body.includes(heading), heading);
    assert.equal(bound.includes(heading), false, heading);
  }
  assert.ok(body.includes("~/.workbuddy/skills"));
  assert.equal(bound.includes("~/.workbuddy/skills"), false);
  assert.ok(bound.split("\n").length < 500, `${bound.split("\n").length} lines`);
  assert.ok(bound.length < body.length * 0.7, `${bound.length} of ${body.length}`);
});

test("binding the method costs a fraction of activating the skill", async () => {
  // What activation would have sent, measured rather than assumed: Mastra answers
  // it with the entrypoint plus a flat listing of every file in the package, and
  // that listing is the majority of the bytes. Nothing carries over between
  // requests, so it was resent on every turn of every conversation.
  const activation = probeAgent({ skills: [jyotishSkillRuntimePath] });
  const skillTool = (await activation.getToolsForExecution({ runId: "probe" })).skill as {
    execute: (input: unknown, context: unknown) => Promise<unknown>;
  };
  const activated = await skillTool.execute(
    { name: jyotishSkillPackage.name },
    { runId: "probe" } as never,
  );
  const activationBytes = Buffer.byteLength(
    typeof activated === "string" ? activated : JSON.stringify(activated),
    "utf8",
  );
  const boundBytes = Buffer.byteLength(jyotishSkillMethodBlock, "utf8");

  assert.ok(activationBytes > boundBytes * 2, `${activationBytes} vs ${boundBytes}`);
  assert.ok(boundBytes < activationBytes * 0.45, `${boundBytes} of ${activationBytes}`);
});

test("agents that bind the method are not given a tool to load it", async () => {
  const bound = probeAgent(jyotishSkillBinding());
  const toolNames = Object.keys(await bound.getToolsForExecution({ runId: "probe" }));

  assert.deepEqual(toolNames, ["skill_read"]);
  // The skill is still declared, so the references the method names by path stay
  // reachable for the one question the delivered sections do not cover.
  assert.equal(
    (await bound.listSkills()).some((skill) => skill.name === jyotishSkillPackage.name),
    true,
  );
});

test("a prompt assembled without the method stops the run instead of answering", () => {
  const abortReasons: string[] = [];
  const abort = ((reason?: string) => {
    abortReasons.push(reason ?? "");
    throw new Error("aborted");
  }) as never;
  const step = (system: unknown[]) => jyotishSkillBoundProcessor.processInputStep({
    messageList: { getAllSystemMessages: () => system },
    abort,
  } as never);

  assert.throws(() => step([{ role: "system", content: "you are a guide" }]), /aborted/);
  assert.match(abortReasons[0], /not bound into the system prompt/);

  // A prompt that does carry the method, and a prompt that cannot be read at all,
  // both pass: this guard exists to catch a missing method, not to become a new
  // way for a run to fail.
  assert.doesNotThrow(() => step([{ role: "system", content: jyotishSkillMethodBlock }]));
  assert.doesNotThrow(() => step([{ role: "system", content: jyotishSkillMethodCoreBlock }]));
  assert.doesNotThrow(() => step([]));
});

function agentConstructorBodies(source: string): string[] {
  const bodies: string[] = [];
  const needle = "new Agent(";
  let search = 0;
  while (true) {
    const start = source.indexOf(needle, search);
    if (start < 0) break;
    const openParen = start + needle.length - 1;
    let depth = 0;
    let inStr: string | null = null;
    let escaped = false;
    let i = openParen;
    for (; i < source.length; i += 1) {
      const ch = source[i];
      if (inStr) {
        if (escaped) {
          escaped = false;
          continue;
        }
        if (ch === "\\") {
          escaped = true;
          continue;
        }
        if (ch === inStr) inStr = null;
        continue;
      }
      if (ch === "'" || ch === '"' || ch === "`") {
        inStr = ch;
        continue;
      }
      if (ch === "(") depth += 1;
      else if (ch === ")") {
        depth -= 1;
        if (depth === 0) {
          i += 1;
          break;
        }
      }
    }
    bodies.push(source.slice(start, i));
    search = i;
  }
  return bodies;
}

function constTemplateBody(file: string, name: string): string {
  return new RegExp(`(?:const|let) ${name} = \`([\\s\\S]*?)\`;`).exec(file)?.[1] ?? "";
}

function instructionSource(agentBody: string, file: string): string {
  const named = /instructions:\s*([A-Za-z_][A-Za-z0-9_]*)/.exec(agentBody);
  let text = named
    ? `${agentBody}\n${constTemplateBody(file, named[1])}`
    : (/instructions:\s*`([\s\S]*?)`/.exec(agentBody)?.[1] ?? agentBody);
  for (const match of text.matchAll(/\$\{([A-Za-z_][A-Za-z0-9_]*)\}/g)) {
    text += `\n${constTemplateBody(file, match[1])}`;
  }
  return text;
}

function carriesBoundMethodMarker(text: string): boolean {
  return text.includes("jyotishSkillMethodBlock")
    || text.includes("jyotishSkillMethodCoreBlock")
    || text.includes(BOUND_METHOD_MARKER)
    || text.includes("<jyotish-skill name=");
}

test("every agent that attaches jyotishSkillBinding carries the method marker (BUG-954)", () => {
  const mastra = readFileSync(new URL("../src/mastra/index.ts", import.meta.url), "utf8");
  const boundAgents = agentConstructorBodies(mastra).filter((body) => body.includes("...jyotishSkillBinding()"));
  assert.ok(boundAgents.length >= 3, `expected natal, legacy, and window agents, got ${boundAgents.length}`);
  for (const body of boundAgents) {
    assert.equal(carriesBoundMethodMarker(instructionSource(body, mastra)), true, body.slice(0, 160));
  }
  assert.match(jyotishSkillMethodCoreBlock, new RegExp(BOUND_METHOD_MARKER.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")));
  assert.doesNotMatch(jyotishSkillMethodCoreBlock, /Level 2 report template/);
  assert.match(jyotishSkillMethodBlock, /Level 2 report template/);
});

test("window agent input processing does not abort (BUG-954)", async () => {
  const { getWindowJyotishAgent } = await import("../src/mastra/index.ts");
  const { createConsultationRuntimeState, createWindowConsultationAgentContext } = await import("../src/mastra/consultation-tools.ts");
  const model = {
    id: "window-binding-probe",
    label: "Window probe",
    description: "",
    creditCost: 1,
    isDefault: false,
    mode: "openai",
    model: "openai/gpt-5-mini",
  } as never;
  const agent = getWindowJyotishAgent(model, createWindowConsultationAgentContext({
    userId: "user",
    sessionId: "session",
    requestId: "req",
    consultationMode: "declared_birth_window",
    declaredWindow: {
      name: "探针",
      toolInput: {
        year: 1990, month: 1, day: 2, city: "台北", lat: 25.03, lon: 121.56, tz: 8,
        ayanamsa: "raman", rangeStart: "04:00", rangeEnd: "06:00",
      },
      truth: {
        birthDate: "1990-01-02",
        birthTimeSource: "family_period",
        birthTimePeriod: "morning",
        birthTimeStatus: "window",
        wrapsMidnight: false,
        placeLabel: "台北",
        placeCodes: { countryCode: "TW", provinceCode: null, cityCode: null, districtCode: null },
        placeId: null,
        placeType: "city",
        placeProvider: "profile",
        timezoneId: "Asia/Taipei",
        timezoneSource: "profile",
        latitude: 25.03,
        longitude: 121.56,
        timezoneOffset: 8,
      },
    },
    state: createConsultationRuntimeState(),
  }));
  const instructions = await agent.getInstructions();
  const text = typeof instructions === "string" ? instructions : JSON.stringify(instructions);
  assert.match(text, /<jyotish-skill name="/);
  assert.doesNotMatch(text, /Level 2 report template/);
  const abortReasons: string[] = [];
  assert.doesNotThrow(() => jyotishSkillBoundProcessor.processInputStep({
    messageList: { getAllSystemMessages: () => [{ role: "system", content: text }] },
    abort: ((reason?: string) => {
      abortReasons.push(reason ?? "");
      throw new Error("aborted");
    }) as never,
  } as never));
  assert.equal(abortReasons.length, 0);
});

test("only chart-answering agents bind the method", () => {
  const mastra = readFileSync(new URL("../src/mastra/index.ts", import.meta.url), "utf8");
  const chart = mastra.slice(
    mastra.indexOf("const jyotishInstructions"),
    mastra.indexOf("const generalJyotishInstructions"),
  );
  const general = mastra.slice(
    mastra.indexOf("const generalJyotishInstructions"),
    mastra.indexOf("const dailyStarlanguageInstructions"),
  );
  const daily = mastra.slice(
    mastra.indexOf("const dailyStarlanguageInstructions"),
    mastra.indexOf("const birthTimeGuideInstructions"),
  );

  assert.match(chart, /\.\.\.jyotishSkillBinding\(\)/);
  assert.match(chart, /\$\{jyotishSkillMethodBlock\}/);
  // 原值: 另切 onboardingInstructions，断言它也不绑方法。
  // 新值: onboarding agent 已删除；general 与 daily 仍不绑。
  // 原因: 建议问题生成接口下线。
  for (const [name, source] of [["general", general], ["daily", daily]] as const) {
    assert.doesNotMatch(source, /jyotishSkillBinding|jyotishSkillMethodBlock/, name);
  }
});

test("the system block binds the shared method sections verbatim from the package", () => {
  const shared = sharedConsultationMethodMarkdown();
  const opened = jyotishSkillMethodBlock.indexOf("<jyotish-shared-method>");
  const closed = jyotishSkillMethodBlock.indexOf("</jyotish-shared-method>");
  assert.ok(opened >= 0 && closed > opened);
  const boundShared = jyotishSkillMethodBlock.slice(
    opened + "<jyotish-shared-method>".length,
    closed,
  ).trim();
  assert.equal(boundShared, shared.trim());
  assert.match(shared, /Full-Spectrum Invocation Contract/);
  assert.ok(shared.includes(readFileSync(resolve(jyotishSkillPackage.resolvedPath, "references/event_judgment_skeleton.md"), "utf8").trim()));
});