from flask import Blueprint, render_template, request, jsonify, flash, redirect, url_for
from flask_login import login_required, current_user
import logging
import difflib
from pathlib import Path
from config import Config
from backend.services.redfish_client import RedfishClient
from backend.routes.xml import sanitize_preserve_unicode

scp_bp = Blueprint("scp", __name__)
logger = logging.getLogger(__name__)

@scp_bp.route("/scp/diff", methods=["GET"])
@login_required
def diff_scp():
    """
    두 XML 파일의 차이점을 비교하여 보여줍니다.
    """
    file1_name = request.args.get("file1")
    file2_name = request.args.get("file2")

    if not file1_name or not file2_name:
        flash("비교할 두 파일을 선택해주세요.", "warning")
        return redirect(url_for("xml.xml_management"))

    try:
        file1_path = Path(Config.XML_FOLDER) / sanitize_preserve_unicode(file1_name)
        file2_path = Path(Config.XML_FOLDER) / sanitize_preserve_unicode(file2_name)

        if not file1_path.exists() or not file2_path.exists():
            flash("파일을 찾을 수 없습니다.", "danger")
            return redirect(url_for("xml.xml_management"))

        # 파일 내용 읽기 (LF로 통일)
        content1 = file1_path.read_text(encoding="utf-8").replace("\r\n", "\n").splitlines()
        content2 = file2_path.read_text(encoding="utf-8").replace("\r\n", "\n").splitlines()

        # Diff 생성
        diff = difflib.unified_diff(
            content1, content2,
            fromfile=file1_name,
            tofile=file2_name,
            lineterm=""
        )
        
        diff_content = "\n".join(diff)

        return render_template("scp_diff.html", file1=file1_name, file2=file2_name, diff_content=diff_content)

    except Exception as e:
        logger.error(f"Diff error: {e}")
        flash(f"비교 중 오류가 발생했습니다: {str(e)}", "danger")
        return redirect(url_for("xml.xml_management"))

@scp_bp.route("/scp/export", methods=["POST"])
@login_required
def export_scp():
    """
    iDRAC에서 설정을 내보내기 (Export)
    네트워크 공유 설정이 필요합니다.
    """
    data = request.form
    target_ip = data.get("target_ip")
    username = data.get("username")
    password = data.get("password")
    
    # Share Parameters
    share_ip = data.get("share_ip")
    share_name = data.get("share_name")
    share_user = data.get("share_user")
    share_pwd = data.get("share_pwd")
    filename = data.get("filename")

    if not all([target_ip, username, password, share_ip, share_name, filename]):
        flash("필수 정보가 누락되었습니다.", "warning")
        return redirect(url_for("xml.xml_management"))

    share_params = {
        "IPAddress": share_ip,
        "ShareName": share_name,
        "FileName": filename,
        "ShareType": "CIFS", # 기본값 CIFS
        "UserName": share_user,
        "Password": share_pwd
    }

    try:
        with RedfishClient(target_ip, username, password) as client:
            job_id = client.export_system_configuration(share_params)
            if job_id:
                flash(f"내보내기 작업이 시작되었습니다. Job ID: {job_id}", "success")
            else:
                flash("작업을 시작했으나 Job ID를 받지 못했습니다.", "warning")
    except Exception as e:
        logger.error(f"Export failed: {e}")
        flash(f"내보내기 실패: {str(e)}", "danger")

    return redirect(url_for("xml.xml_management"))

@scp_bp.route("/scp/import", methods=["POST"])
@login_required
def import_scp():
    """
    iDRAC로 설정 가져오기 (Import/Deploy)
    """
    data = request.form
    target_ip = data.get("target_ip")
    username = data.get("username")
    password = data.get("password")
    
    # Share Parameters
    share_ip = data.get("share_ip")
    share_name = data.get("share_name")
    share_user = data.get("share_user")
    share_pwd = data.get("share_pwd")
    filename = data.get("filename")
    
    import_mode = data.get("import_mode", "Replace")

    if not all([target_ip, username, password, share_ip, share_name, filename]):
        flash("필수 정보가 누락되었습니다.", "warning")
        return redirect(url_for("xml.xml_management"))

    share_params = {
        "IPAddress": share_ip,
        "ShareName": share_name,
        "FileName": filename,
        "ShareType": "CIFS",
        "UserName": share_user,
        "Password": share_pwd
    }

    try:
        with RedfishClient(target_ip, username, password) as client:
            job_id = client.import_system_configuration(share_params, import_mode=import_mode)
            if job_id:
                flash(f"설정 적용(Import) 작업이 시작되었습니다. Job ID: {job_id}", "success")
            else:
                flash("작업을 시작했으나 Job ID를 받지 못했습니다.", "warning")
    except Exception as e:
        logger.error(f"Import failed: {e}")
        flash(f"설정 적용 실패: {str(e)}", "danger")

    return redirect(url_for("xml.xml_management"))