fix(api): fallback weekly git stats to gitea

apps/api/src/services/weekly_report_service.py

@@ -20,13 +20,17 @@ Weekly Report Service - Phase 21.3 定期報告
 """
 
 import asyncio
+import json
 import subprocess
 from datetime import datetime, timedelta
+from urllib.parse import quote, urlencode
+from urllib.request import Request, urlopen
 from typing import Protocol, runtime_checkable
 
 import structlog
 from zoneinfo import ZoneInfo
 
+from src.core.config import settings
 from src.services.stats_service import StatsService, get_stats_service
 from src.services.k3s_monitor_service import K3sMonitorService, get_k3s_monitor_service
 from src.services.telegram_gateway import WeeklyReportMessage, get_telegram_gateway
@@ -112,7 +116,7 @@ class WeeklyReportService:
                     returncode=result.returncode,
                     stderr=result.stderr[-300:],
                 )
-                return 0, 0, False
+                return self._get_gitea_commit_stats(since)
             commits = len(result.stdout.strip().split("\n")) if result.stdout.strip() else 0
 
             # 取得部署次數 (計算含 "deploy" 或 "CD" 的 commits)
@@ -129,12 +133,56 @@ class WeeklyReportService:
                     returncode=result_deploy.returncode,
                     stderr=result_deploy.stderr[-300:],
                 )
-                return commits, 0, False
+                return self._get_gitea_commit_stats(since)
             deploys = len(result_deploy.stdout.strip().split("\n")) if result_deploy.stdout.strip() else 0
 
             return commits, deploys, True
         except Exception as e:
             logger.warning("git_stats_failed", error=str(e))
+            return self._get_gitea_commit_stats(since)
+
+    def _get_gitea_commit_stats(self, since: datetime) -> tuple[int, int, bool]:
+        """從 Gitea commits API 讀取週報開發活動統計。"""
+        api_url = settings.GITEA_API_URL.rstrip("/")
+        owner = quote(str(settings.GITEA_REPO_OWNER), safe="")
+        repo = quote(str(settings.GITEA_REPO_NAME), safe="")
+        since_utc = since.astimezone(ZoneInfo("UTC")).isoformat().replace("+00:00", "Z")
+        headers = {"Accept": "application/json", "User-Agent": "awoooi-weekly-report/1.0"}
+        if settings.GITEA_API_TOKEN:
+            headers["Authorization"] = f"token {settings.GITEA_API_TOKEN}"
+
+        commits = 0
+        deploys = 0
+        page = 1
+        limit = 50
+        try:
+            while page <= 20:
+                query = urlencode({
+                    "sha": "main",
+                    "since": since_utc,
+                    "page": page,
+                    "limit": limit,
+                })
+                url = f"{api_url}/api/v1/repos/{owner}/{repo}/commits?{query}"
+                request = Request(url, headers=headers)
+                with urlopen(request, timeout=8) as response:
+                    payload = json.loads(response.read().decode("utf-8"))
+                if not isinstance(payload, list):
+                    logger.warning("gitea_git_stats_unexpected_payload", payload_type=type(payload).__name__)
+                    return 0, 0, False
+                commits += len(payload)
+                for item in payload:
+                    commit = item.get("commit") if isinstance(item, dict) else {}
+                    message = str((commit or {}).get("message") or "")
+                    subject = message.splitlines()[0].lower()
+                    if "deploy" in subject or subject.startswith("chore(cd):"):
+                        deploys += 1
+                if len(payload) < limit:
+                    break
+                page += 1
+            return commits, deploys, True
+        except Exception as exc:
+            logger.warning("gitea_git_stats_failed", error=str(exc))
             return 0, 0, False
 
     async def generate_report(self) -> WeeklyReportMessage: