/**
 * M7 Integration Tests: Entry point + mode handler platform routing.
 *
 * Verifies that:
 * - Tag mode routes to fetchForgejoData on Forgejo and fetchGitHubData on GitHub
 * - createInitialComment uses Forgejo spinner/URL format on Forgejo
 * - update-comment-link uses updateForgejoCommentBody on Forgejo
 * - update-comment-link uses Forgejo PR compare URL format on Forgejo
 */

import { describe, it, expect, beforeEach, afterEach } from "bun:test";
import { detectPlatform } from "../src/platform/detector";

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

let savedEnv: Record<string, string | undefined>;

function saveEnv(...keys: string[]) {
  savedEnv = {};
  for (const key of keys) {
    savedEnv[key] = process.env[key];
  }
}

function restoreEnv() {
  for (const [key, value] of Object.entries(savedEnv)) {
    if (value === undefined) {
      delete process.env[key];
    } else {
      process.env[key] = value;
    }
  }
}

// ---------------------------------------------------------------------------
// Platform detection routing (verifies the branch logic used in M7)
// ---------------------------------------------------------------------------

describe("M7: Platform routing for mode handlers", () => {
  beforeEach(() => {
    saveEnv("PLATFORM", "FORGEJO", "GITHUB_SERVER_URL");
  });

  afterEach(() => {
    restoreEnv();
  });

  describe("detectPlatform() — used by tag mode and update-comment-link", () => {
    it('returns "forgejo" when PLATFORM=forgejo', () => {
      process.env.PLATFORM = "forgejo";
      expect(detectPlatform()).toBe("forgejo");
    });

    it('returns "github" when PLATFORM=github', () => {
      process.env.PLATFORM = "github";
      expect(detectPlatform()).toBe("github");
    });

    it('returns "forgejo" when FORGEJO=true', () => {
      delete process.env.PLATFORM;
      process.env.FORGEJO = "true";
      expect(detectPlatform()).toBe("forgejo");
    });

    it('returns "forgejo" when GITHUB_SERVER_URL is not github.com', () => {
      delete process.env.PLATFORM;
      delete process.env.FORGEJO;
      process.env.GITHUB_SERVER_URL = "https://git.wxs.ro";
      expect(detectPlatform()).toBe("forgejo");
    });

    it('returns "github" by default', () => {
      delete process.env.PLATFORM;
      delete process.env.FORGEJO;
      process.env.GITHUB_SERVER_URL = "https://github.com";
      expect(detectPlatform()).toBe("github");
    });
  });
});

// ---------------------------------------------------------------------------
// Initial comment platform-aware body
// ---------------------------------------------------------------------------

describe("M7: createInitialComment platform-aware body", () => {
  beforeEach(() => {
    saveEnv("PLATFORM", "GITHUB_SERVER_URL");
  });

  afterEach(() => {
    restoreEnv();
  });

  it("Forgejo comment body helpers produce Unicode spinner, not GitHub CDN", async () => {
    const {
      createForgejoJobRunLink,
      createForgejoCommentBody,
      FORGEJO_SPINNER_HTML,
    } = await import("../src/forgejo/comment-logic");

    const link = createForgejoJobRunLink("owner", "repo", "123");
    const body = createForgejoCommentBody(link);

    // Uses Unicode spinner, not an <img> tag
    expect(body).toContain(FORGEJO_SPINNER_HTML);
    expect(body).not.toContain("<img");
    expect(body).not.toContain("github.com/user-attachments");
    // Contains the job run link
    expect(body).toContain("[View job run]");
  });

  it("GitHub comment body helpers produce CDN spinner image", async () => {
    const { createJobRunLink, createCommentBody, SPINNER_HTML } = await import(
      "../src/github/operations/comments/common"
    );

    const link = createJobRunLink("owner", "repo", "123");
    const body = createCommentBody(link);

    expect(body).toContain(SPINNER_HTML);
    expect(body).toContain("<img");
    expect(body).toContain("[View job run]");
  });
});

// ---------------------------------------------------------------------------
// update-comment-link: Forgejo PR compare URL format
// ---------------------------------------------------------------------------

describe("M7: Forgejo PR compare URL format", () => {
  it("uses expand=1 instead of quick_pull=1", async () => {
    const { createForgejoPrCompareUrl } = await import(
      "../src/forgejo/comment-logic"
    );

    const url = createForgejoPrCompareUrl(
      "https://git.wxs.ro",
      "owner",
      "repo",
      "main",
      "claude/fix-bug",
      "Issue #42: Changes from Claude",
      "This PR addresses issue #42",
    );

    expect(url).toContain("expand=1");
    expect(url).not.toContain("quick_pull=1");
    expect(url).toContain("git.wxs.ro");
    expect(url).toContain("compare/main...claude/fix-bug");
  });
});

// ---------------------------------------------------------------------------
// update-comment-link: platform-aware final comment body
// ---------------------------------------------------------------------------

describe("M7: updateForgejoCommentBody vs updateCommentBody", () => {
  it("Forgejo version strips Unicode spinner", async () => {
    const { updateForgejoCommentBody } = await import(
      "../src/forgejo/comment-logic"
    );

    const result = updateForgejoCommentBody({
      currentBody:
        "Claude Code is working… ⏳\n\nI'll analyze this and get back to you.\n\n[View job run](https://git.wxs.ro/owner/repo/actions/runs/123)",
      actionFailed: false,
      executionDetails: { duration_ms: 30000 },
      jobUrl: "https://git.wxs.ro/owner/repo/actions/runs/123",
      triggerUsername: "testuser",
    });

    expect(result).not.toContain("⏳");
    expect(result).not.toContain("Claude Code is working");
    expect(result).toContain("@testuser");
    expect(result).toContain("30s");
  });

  it("GitHub version strips CDN spinner image", async () => {
    const { updateCommentBody } = await import(
      "../src/github/operations/comment-logic"
    );

    const result = updateCommentBody({
      currentBody:
        'Claude Code is working… <img src="https://github.com/user-attachments/assets/5ac382c7-e004-429b-8e35-7feb3e8f9c6f" width="14px" height="14px" />\n\nI\'ll analyze this and get back to you.\n\n[View job run](https://github.com/owner/repo/actions/runs/123)',
      actionFailed: false,
      executionDetails: { duration_ms: 30000 },
      jobUrl: "https://github.com/owner/repo/actions/runs/123",
      triggerUsername: "testuser",
    });

    expect(result).not.toContain("<img");
    expect(result).not.toContain("Claude Code is working");
    expect(result).toContain("@testuser");
    expect(result).toContain("30s");
  });
});

// ---------------------------------------------------------------------------
// Tag mode: data fetcher selection
// ---------------------------------------------------------------------------

describe("M7: Tag mode data fetcher selection", () => {
  it("fetchForgejoData and fetchGitHubData both produce FetchDataResult type", async () => {
    // Verify both functions are importable and are functions
    // (actual execution requires mock Octokit — covered by their respective test files)
    const { fetchForgejoData } = await import("../src/forgejo/data/fetcher");
    const { fetchGitHubData } = await import("../src/github/data/fetcher");

    expect(typeof fetchForgejoData).toBe("function");
    expect(typeof fetchGitHubData).toBe("function");
  });

  it("tag mode imports both fetchers", async () => {
    // Verify the tag mode module imports work without errors
    const tagMode = await import("../src/modes/tag");
    expect(typeof tagMode.prepareTagMode).toBe("function");
  });
});

// ---------------------------------------------------------------------------
// Agent mode: no changes needed (verify no regression)
// ---------------------------------------------------------------------------

describe("M7: Agent mode — no platform changes needed", () => {
  it("prepareAgentMode is still exported and functional", async () => {
    const agentMode = await import("../src/modes/agent");
    expect(typeof agentMode.prepareAgentMode).toBe("function");
  });
});