diff --git a/src/analyzers/git_repository.py b/src/analyzers/git_repository.py
index 200776b..b3e342b 100644
--- a/src/analyzers/git_repository.py
+++ b/src/analyzers/git_repository.py
@@ -1,102 +1,90 @@
-from datetime import datetime
+import os
 from typing import List, Optional
+
 from git import Repo, GitCommandError
+
 from src.models import Commit
 
 
 class GitRepository:
-    def __init__(self, path: str):
-        self.path = path
-        self._repo: Optional[Repo] = None
+    """Wrapper for GitPython repository operations."""
 
-    def get_repo(self) -> Repo:
-        if self._repo is None:
-            self._repo = Repo(self.path)
-        return self._repo
+    def __init__(self, repo_path: str) -> None:
+        """Initialize GitRepository."""
+        self.repo_path = repo_path
+        self.repo: Optional[Repo] = None
+
+    def connect(self) -> None:
+        """Connect to the git repository."""
+        if not os.path.isdir(self.repo_path):
+            raise ValueError(f"Directory not found: {self.repo_path}")
+
+        git_path = os.path.join(self.repo_path, ".git")
+        if not os.path.isdir(git_path):
+            raise ValueError(f"Not a git repository: {self.repo_path}")
+
+        self.repo = Repo(self.repo_path)
+
+    def get_commits(
+        self,
+        since_days: int = 30,
+        author: Optional[str] = None,
+    ) -> List[Commit]:
+        """Get commits from the repository."""
+        if self.repo is None:
+            self.connect()
+
+        from datetime import datetime, timedelta
+
+        since_date = datetime.now() - timedelta(days=since_days)
 
-    def get_commits(self, since: Optional[datetime] = None, until: Optional[datetime] = None) -> List[Commit]:
-        repo = self.get_repo()
         commits = []
-        
         try:
-            commit_iter = repo.iter_commits(
-                rev=None,
-                since=since.isoformat() if since else None,
-                until=until.isoformat() if until else None,
-                max_count=None,
-            )
-            
-            for git_commit in commit_iter:
-                commit = self._convert_git_commit(git_commit)
-                if commit:
-                    commits.append(commit)
-                    
-        except GitCommandError as e:
-            raise ValueError(f"Error reading git repository: {e}")
-        
+            for commit in self.repo.iter_commits(
+                since=since_date,
+                author=author,
+                all=True,
+            ):
+                try:
+                    commit_obj = Commit(
+                        sha=commit.hexsha[:7],
+                        message=commit.message.strip() if commit.message else "",
+                        author_name=commit.author.name if commit.author else "Unknown",
+                        author_email=commit.author.email if commit.author else "",
+                        committed_datetime=commit.committed_datetime,
+                        author_datetime=commit.authored_datetime,
+                        additions=commit.stats.files.get(commit.hexsha, {}).get("insertions", 0) if hasattr(commit, 'stats') else 0,
+                        deletions=commit.stats.files.get(commit.hexsha, {}).get("deletions", 0) if hasattr(commit, 'stats') else 0,
+                        files_changed=list(commit.stats.files.keys()) if hasattr(commit, 'stats') else [],
+                        parents=[p.hexsha for p in commit.parents] if commit.parents else [],
+                        is_merge=len(commit.parents) > 1 if commit.parents else False,
+                    )
+                    commits.append(commit_obj)
+                except Exception:
+                    continue
+        except GitCommandError:
+            pass
+
         return commits
 
-    def _convert_git_commit(self, git_commit) -> Optional[Commit]:
-        try:
-            parents = [p.hexsha for p in git_commit.parents]
-            is_merge = len(parents) > 1
-            
-            is_revert = False
-            if git_commit.message.lower().startswith(("revert", "reverted")):
-                is_revert = True
-            
-            file_changes = []
-            additions = 0
-            deletions = 0
-            
-            try:
-                if git_commit.stats and git_commit.stats.files:
-                    for filepath, stats in git_commit.stats.files.items():
-                        file_change = self._create_file_change(filepath, stats)
-                        file_changes.append(file_change)
-                        additions += stats.get('insertions', 0)
-                        deletions += stats.get('deletions', 0)
-            except Exception:
-                pass
-            
-            return Commit(
-                sha=git_commit.hexsha,
-                message=git_commit.message.strip(),
-                author_name=git_commit.author.name or "Unknown",
-                author_email=git_commit.author.email or "",
-                committed_datetime=datetime.fromtimestamp(git_commit.committed_date),
-                author_datetime=datetime.fromtimestamp(git_commit.authored_date),
-                parents=parents,
-                additions=additions,
-                deletions=deletions,
-                files_changed=len(file_changes),
-                file_changes=file_changes,
-                is_merge=is_merge,
-                is_revert=is_revert,
-            )
-        except Exception:
-            return None
-
-    def _create_file_change(self, filepath: str, stats: dict) -> "FileChange":  # noqa: F821
-        from src.models import FileChange
-        return FileChange(
-            filepath=filepath,
-            additions=stats.get('insertions', 0),
-            deletions=stats.get('deletions', 0),
-            changes=stats.get('insertions', 0) + stats.get('deletions', 0),
-        )
-
     def get_commit_count(self) -> int:
-        return sum(1 for _ in self.get_repo().iter_commits())
+        """Get total commit count."""
+        if self.repo is None:
+            self.connect()
+
+        return sum(1 for _ in self.repo.iter_commits())
+
+    def get_active_authors(self) -> List[str]:
+        """Get list of active authors."""
+        if self.repo is None:
+            self.connect()
 
-    def get_unique_authors(self) -> set:
         authors = set()
-        for commit in self.get_repo().iter_commits():
-            if commit.author.name:
-                authors.add(commit.author.name)
-        return authors
+        try:
+            for commit in self.repo.iter_commits():
+                if commit.author:
+                    authors.add(f"{commit.author.name} <{commit.author.email}>")
+        except GitCommandError:
+            pass
 
-    def close(self):
-        if self._repo:
-            self._repo.close()
-            self._repo = None
+        return list(authors)