from flask import Flask, request, jsonify
from tool import create_session, get_pull_request_overview, get_diff, send_slack_message, save_md_report, reply_slack_thread
from dotenv import load_dotenv
import os
from agent.code_review import code_review_agent, read_text_file, DiffDeps

# Set up ENVIRONMENT VARIABLE
load_dotenv()
WORKSPACE_ID = os.getenv("WORKSPACE_ID")
BITBUCKET_USERNAME = os.getenv("BITBUCKET_USERNAME")
BITBUCKET_APP_PASSWORD = os.getenv("BITBUCKET_APP_PASSWORD")
DEFAULT_BASE_URL = os.getenv("DEFAULT_BASE_URL")
REPO_SLUG = os.getenv("REPO_SLUG")
SLACK_WEBHOOK_URL = os.getenv("SLACK_WEBHOOK_URL")
SLACK_BOT_TOKEN = os.getenv("SLACK_BOT_TOKEN")
SLACK_CHANNEL = os.getenv("SLACK_CHANNEL")


app = Flask(__name__)


@app.route("/webhook", methods=["POST"])
def webhook():
    event_key = request.headers.get("X-Event-Key")  # ví dụ: pullrequest:created, repo:push
    payload = request.json

    print("=== Webhook Received ===")
    print("Event:", event_key)

    # Xử lý Pull Request event
    if event_key and event_key.startswith("pullrequest"):
        if payload and "pullrequest" in payload:
            pr = payload["pullrequest"]
            pr_info = {
                "id": pr.get("id"),
                "title": pr.get("title"),
                "state": pr.get("state"),
                "author": pr.get("author", {}).get("display_name"),
                "source_branch": pr.get("source", {}).get("branch", {}).get("name"),
                "destination_branch": pr.get("destination", {}).get("branch", {}).get("name"),
            }
            print("Pull Request Info:", pr_info)

            # Chỉ xử lý khi có đủ thông tin PR
            if pr_info["id"]:
                try:
                    PR_ID = pr_info["id"]

                    session = create_session(BITBUCKET_USERNAME, BITBUCKET_APP_PASSWORD)
                    data = get_pull_request_overview(
                        session = session, 
                        workspace = WORKSPACE_ID, 
                        repo_slug = REPO_SLUG, 
                        pr_id = PR_ID, 
                        base_url = DEFAULT_BASE_URL
                    )

                    title = data["title"]
                    description = data["description"]
                    source_branch = data["source"]["branch"]["name"]
                    destination_branch = data["destination"]["branch"]["name"]
                    author = data["author"]["display_name"]
                    created_on = data["created_on"]
                    reviewers = data.get("reviewers", [])
                    reviewer_mentions = " ".join([f"@{r.get('nickname')}" for r in reviewers]) if reviewers else "None"
                    pr_link = data["links"]["html"]["href"]
                    changelog = data["summary"]["raw"]
                    diff_url = data["links"]["diff"]["href"]

                    # Tạo nội dung PR
                    pr_report = (
                        f"# [{REPO_SLUG}] PR #{PR_ID}: {title}\n"
                        f"*{description}*\n\n"
                        f"**🌿 Branch Information:**\n"
                        f"- **Source Branch:** {source_branch} → **Target Branch:** {destination_branch}\n\n"
                        f"**👤 Người tạo:** {author}\n\n"
                        f"**📅 Thời gian tạo:** {created_on}\n\n"
                        f"**👥 Reviewers:**\n{reviewer_mentions}\n\n"
                        f"**🔗 Link Pull Request:** {pr_link}\n"
                    )

                    print(pr_report)

                    # Lấy diff và chạy agent
                    diff = get_diff(session, diff_url)
                    print("Running Agent ...")
                    code_review_result = code_review_agent.run_sync("", deps = DiffDeps(diff = diff[:-10_000]))
                    code_review_text = getattr(code_review_result, "output", None) or str(code_review_result)

                    # Gộp thông tin PR + kết quả review vào 1 lần gửi
                    code_review_message = (
                        f"## 🤖 Code Review Summary\n\n"
                        f"{code_review_text}"
                    )

                    resp = send_slack_message(
                        message_text = pr_report,
                        webhook_url = SLACK_WEBHOOK_URL,
                        bot_token = SLACK_BOT_TOKEN,
                        channel = "pull-request",
                        blocks = [
                            {
                                "type": "markdown",
                                "text": pr_report
                            }
                        ]
                    )

                    first_message_ts = resp["response"]["ts"]  # lấy ts để trả lời sau

                    reply_slack_thread(
                        thread_ts=first_message_ts,
                        message_text=code_review_message,
                        channel="pull-request",
                        blocks = [
                            {
                                "type": "markdown",
                                "text": pr_report
                            }
                        ]
                    ) 
                    print("Sent combined PR + code review")

                    return jsonify({"status": "ok", "message": "Pull request processed successfully"}), 200
                except Exception as exc:
                    print("Error processing pull request:", str(exc))
                    return jsonify({"status": "error", "message": str(exc)}), 500
            else:
                return jsonify({"status": "error", "message": "Invalid pull request data"}), 400
        else:
            return jsonify({"status": "error", "message": "No pull request data in payload"}), 400
    
    # Xử lý các event khác
    elif event_key and event_key.startswith("repo"):
        print("Repository event received:", event_key)
        return jsonify({"status": "ok", "message": "Repository event received"}), 200
    
    else:
        print("Unknown event type:", event_key)
        return jsonify({"status": "ok", "message": "Event received but not processed"}), 200


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860)