import { describe, it, expect, beforeEach, afterEach } from "bun:test";
import { createRunner } from "./agent-mock.ts";
import {
  setupTempDir,
  cleanupTempDir,
  getTempDir,
  createFreshProject,
  changeFileExists,
} from "./fixtures.ts";
import { assertAllTasksDone } from "./validators.ts";
import { scanChanges, scanArchives } from "../../src/core/scanner.ts";
import { assembleDiscussPrompt } from "../../src/core/assembler.ts";
import { validateChangeName } from "../../src/cli.ts";

describe("e2e: 全流程", () => {
  let runner: ReturnType<typeof createRunner>;

  beforeEach(async () => {
    await setupTempDir();
    runner = createRunner();
  });

  afterEach(async () => {
    await cleanupTempDir();
  });

  it("完整四阶段流程（discuss → plan → build → archive）", async () => {
    const config = await createFreshProject();

    const discussPrompt = assembleDiscussPrompt(config);
    expect(typeof discussPrompt).toBe("string");
    expect(discussPrompt.length).toBeGreaterThan(0);

    await runner.runPlan(getTempDir(), "full-flow", "design", config);
    await runner.runPlan(getTempDir(), "full-flow", "task", config);

    let changes = await scanChanges(getTempDir(), config);
    expect(changes).toHaveLength(1);
    expect(changes[0]!.name).toBe("full-flow");
    expect(changes[0]!.planCompleted).toBe(true);
    expect(changes[0]!.buildUnlocked).toBe(true);

    const buildResult = await runner.runBuild(getTempDir(), "full-flow", config);
    expect(buildResult.files.length).toBeGreaterThan(0);

    changes = await scanChanges(getTempDir(), config);
    expect(changes).toHaveLength(1);
    assertAllTasksDone(changes[0]!);

    await runner.runArchive(getTempDir(), "full-flow", config);

    expect(changeFileExists("full-flow", "task.md")).toBe(false);

    const archives = await scanArchives(getTempDir());
    expect(archives.length).toBeGreaterThanOrEqual(1);

    changes = await scanChanges(getTempDir(), config);
    expect(changes.find((c) => c.name === "full-flow")).toBeUndefined();
  });

  it("多变更并行互不干扰", async () => {
    const config = await createFreshProject();

    await runner.runPlan(getTempDir(), "变更A", "design", config);
    await runner.runPlan(getTempDir(), "变更A", "task", config);

    await runner.runPlan(getTempDir(), "变更B", "design", config);
    await runner.runPlan(getTempDir(), "变更B", "task", config);

    let changes = await scanChanges(getTempDir(), config);
    expect(changes).toHaveLength(2);

    const changeA = changes.find((c) => c.name === "变更A");
    const changeB = changes.find((c) => c.name === "变更B");
    expect(changeA).toBeDefined();
    expect(changeB).toBeDefined();
    expect(changeA!.planCompleted).toBe(true);
    expect(changeB!.planCompleted).toBe(true);

    await runner.runBuild(getTempDir(), "变更A", config);
    await runner.runBuild(getTempDir(), "变更B", config);

    changes = await scanChanges(getTempDir(), config);
    expect(changes).toHaveLength(2);

    assertAllTasksDone(changes.find((c) => c.name === "变更A")!);
    assertAllTasksDone(changes.find((c) => c.name === "变更B")!);

    expect(changes[0]!.taskProgress?.completed).toBe(changes[0]!.taskProgress?.total);
    expect(changes[1]!.taskProgress?.completed).toBe(changes[1]!.taskProgress?.total);
  });

  describe("变更名非法字符拒绝", () => {
    it("空字符串抛出错误", () => {
      expect(() => validateChangeName("")).toThrow();
    });

    it("包含 / 抛出错误", () => {
      expect(() => validateChangeName("变更/A")).toThrow();
    });

    it("包含 . 抛出错误", () => {
      expect(() => validateChangeName("变更.A")).toThrow();
    });

    it("合法中文名称不抛出错误", () => {
      expect(() => validateChangeName("变更名")).not.toThrow();
    });

    it("合法英文名称不抛出错误", () => {
      expect(() => validateChangeName("my-change")).not.toThrow();
    });

    it("合法短横线名称不抛出错误", () => {
      expect(() => validateChangeName("abc-def-xyz")).not.toThrow();
    });
  });
});