import { describe, expect, test } from "bun:test";
import { parseGitCommitId, detectGitOperation } from "../gitOperationTracking";

describe("parseGitCommitId", () => {
  test("extracts commit hash from git commit output", () => {
    expect(parseGitCommitId("[main abc1234] fix: some message")).toBe("abc1234");
  });

  test("extracts hash from root commit output", () => {
    expect(
      parseGitCommitId("[main (root-commit) abc1234] initial commit")
    ).toBe("abc1234");
  });

  test("returns undefined for non-commit output", () => {
    expect(parseGitCommitId("nothing to commit")).toBeUndefined();
  });

  test("handles various branch name formats", () => {
    expect(parseGitCommitId("[feature/foo abc1234] message")).toBe("abc1234");
    expect(parseGitCommitId("[fix/bar-baz abc1234] message")).toBe("abc1234");
    expect(parseGitCommitId("[v1.0.0 abc1234] message")).toBe("abc1234");
  });

  test("returns undefined for empty string", () => {
    expect(parseGitCommitId("")).toBeUndefined();
  });
});

describe("detectGitOperation", () => {
  test("detects git commit operation", () => {
    const result = detectGitOperation(
      "git commit -m 'fix bug'",
      "[main abc1234] fix bug"
    );
    expect(result.commit).toBeDefined();
    expect(result.commit!.sha).toBe("abc123");
    expect(result.commit!.kind).toBe("committed");
  });

  test("detects git commit --amend operation", () => {
    const result = detectGitOperation(
      "git commit --amend -m 'updated'",
      "[main def5678] updated"
    );
    expect(result.commit).toBeDefined();
    expect(result.commit!.kind).toBe("amended");
  });

  test("detects git cherry-pick operation", () => {
    const result = detectGitOperation(
      "git cherry-pick abc1234",
      "[main def5678] cherry picked commit"
    );
    expect(result.commit).toBeDefined();
    expect(result.commit!.kind).toBe("cherry-picked");
  });

  test("detects git push operation", () => {
    const result = detectGitOperation(
      "git push origin main",
      "   abc1234..def5678  main -> main"
    );
    expect(result.push).toBeDefined();
    expect(result.push!.branch).toBe("main");
  });

  test("detects git merge operation", () => {
    const result = detectGitOperation(
      "git merge feature-branch",
      "Merge made by the 'ort' strategy."
    );
    expect(result.branch).toBeDefined();
    expect(result.branch!.action).toBe("merged");
    expect(result.branch!.ref).toBe("feature-branch");
  });

  test("detects git rebase operation", () => {
    const result = detectGitOperation(
      "git rebase main",
      "Successfully rebased and updated refs/heads/feature."
    );
    expect(result.branch).toBeDefined();
    expect(result.branch!.action).toBe("rebased");
    expect(result.branch!.ref).toBe("main");
  });

  test("returns null for non-git commands", () => {
    const result = detectGitOperation("ls -la", "total 100\ndrwxr-xr-x");
    expect(result.commit).toBeUndefined();
    expect(result.push).toBeUndefined();
    expect(result.branch).toBeUndefined();
    expect(result.pr).toBeUndefined();
  });

  test("detects gh pr create operation", () => {
    const result = detectGitOperation(
      "gh pr create --title 'fix' --body 'desc'",
      "https://github.com/owner/repo/pull/42"
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("created");
  });

  test("detects gh pr merge operation", () => {
    const result = detectGitOperation(
      "gh pr merge 42",
      "✓ Merged pull request owner/repo#42"
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("merged");
  });

  test("handles git commit with -c options", () => {
    const result = detectGitOperation(
      "git -c commit.gpgsign=false commit -m 'msg'",
      "[main aaa1111] msg"
    );
    expect(result.commit).toBeDefined();
    expect(result.commit!.sha).toBe("aaa111");
  });

  test("detects fast-forward merge", () => {
    const result = detectGitOperation(
      "git merge develop",
      "Fast-forward\n file.txt | 1 +\n 1 file changed"
    );
    expect(result.branch).toBeDefined();
    expect(result.branch!.action).toBe("merged");
    expect(result.branch!.ref).toBe("develop");
  });

  test("detects gh pr edit operation", () => {
    const result = detectGitOperation(
      "gh pr edit 42 --title 'new title'",
      "https://github.com/owner/repo/pull/42"
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("edited");
  });

  test("detects gh pr comment operation", () => {
    const result = detectGitOperation(
      "gh pr comment 42 --body 'looks good'",
      "https://github.com/owner/repo/pull/42"
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("commented");
  });

  test("detects gh pr close operation", () => {
    const result = detectGitOperation(
      "gh pr close 42",
      "✓ Closed pull request owner/repo#42"
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("closed");
  });

  test("detects gh pr ready operation", () => {
    const result = detectGitOperation(
      "gh pr ready 42",
      "✓ Converted pull request owner/repo#42 to \"Ready for review\""
    );
    expect(result.pr).toBeDefined();
    expect(result.pr!.number).toBe(42);
    expect(result.pr!.action).toBe("ready");
  });

  test("handles empty command string", () => {
    const result = detectGitOperation("", "some output");
    expect(result.commit).toBeUndefined();
    expect(result.push).toBeUndefined();
    expect(result.branch).toBeUndefined();
    expect(result.pr).toBeUndefined();
  });

  test("handles empty output string", () => {
    const result = detectGitOperation("git commit -m 'msg'", "");
    expect(result.commit).toBeUndefined();
  });

  test("handles malformed git commit output", () => {
    const result = detectGitOperation(
      "git commit -m 'msg'",
      "error: something went wrong"
    );
    expect(result.commit).toBeUndefined();
  });
});