# test_import_msg.py — pokusný import .msg do schránky přes Graph API
# Parsuje .msg soubor a vytvoří zprávu v Inbox cílové schránky.

import base64
import msal
import requests
import extract_msg
import sys
from pathlib import Path

# === CONFIG ===
TENANT_ID = "7d269944-37a4-43a1-8140-c7517dc426e9"
CLIENT_ID = "4b222bfd-78c9-4239-a53f-43006b3ed07f"
CLIENT_SECRET = "Txg8Q~MjhocuopxsJyJBhPmDfMxZ2r5WpTFj1dfk"
MAILBOX = "vladimir.buzalka@buzalka.cz"

AUTHORITY = f"https://login.microsoftonline.com/{TENANT_ID}"
SCOPE = ["https://graph.microsoft.com/.default"]
GRAPH_URL = "https://graph.microsoft.com/v1.0"
TARGET_FOLDER = "JNJ"  # subfolder under Inbox

# === MSG FILE ===
MSG_PATH = Path(__file__).parent / "FC130007ACFE5DCB0000.msg"


def get_token():
    app = msal.ConfidentialClientApplication(
        CLIENT_ID, authority=AUTHORITY, client_credential=CLIENT_SECRET
    )
    token = app.acquire_token_for_client(scopes=SCOPE)
    if "access_token" not in token:
        raise RuntimeError(f"Auth failed: {token}")
    return token["access_token"]


def parse_msg(path):
    """Parse .msg file and return dict with message properties."""
    msg = extract_msg.Message(str(path))

    # Read all properties before closing
    subject = msg.subject or "(no subject)"
    body_html = msg.htmlBody
    if isinstance(body_html, bytes):
        body_html = body_html.decode("utf-8", errors="replace")
    body_text = msg.body or ""

    sender_email = msg.sender or ""
    sender_name = getattr(msg, "senderName", None) or sender_email

    to_raw = msg.to or ""
    cc_raw = msg.cc or ""
    date_raw = msg.date

    att_list = []
    for att in msg.attachments:
        if att.data and att.longFilename:
            att_list.append({
                "@odata.type": "#microsoft.graph.fileAttachment",
                "name": att.longFilename,
                "contentType": getattr(att, "mimetype", None) or "application/octet-stream",
                "contentBytes": base64.b64encode(att.data).decode(),
            })

    msg.close()

    # Process after close
    to_list = [a.strip() for a in to_raw.split(";") if a.strip()]
    cc_list = [a.strip() for a in cc_raw.split(";") if a.strip()]
    received = str(date_raw) if date_raw else None

    return {
        "subject": subject,
        "body_html": body_html,
        "body_text": body_text,
        "sender_email": sender_email,
        "sender_name": sender_name,
        "to": to_list,
        "cc": cc_list,
        "received": received,
        "attachments": att_list,
    }


def make_recipient(addr):
    """Create Graph API recipient object from email address."""
    # Handle 'Name <email>' format
    if "<" in addr and ">" in addr:
        name = addr[:addr.index("<")].strip().strip('"')
        email = addr[addr.index("<") + 1 : addr.index(">")].strip()
    else:
        name = addr
        email = addr
    return {"emailAddress": {"name": name, "address": email}}


def import_msg(msg_path):
    token = get_token()
    headers = {
        "Authorization": f"Bearer {token}",
        "Content-Type": "application/json",
    }

    print(f"Parsing: {msg_path}")
    data = parse_msg(msg_path)
    print(f"  Subject: {data['subject']}")
    print(f"  From: {data['sender_name']} <{data['sender_email']}>")
    print(f"  To: {data['to']}")
    print(f"  Date: {data['received']}")
    print(f"  Attachments: {len(data['attachments'])}")

    # 1. Create message in mailFolder (Inbox)
    payload = {
        "subject": data["subject"],
        "body": {
            "contentType": "HTML" if data["body_html"] else "Text",
            "content": data["body_html"] or data["body_text"],
        },
        "from": make_recipient(
            f"{data['sender_name']} <{data['sender_email']}>"
        ),
        "toRecipients": [make_recipient(a) for a in data["to"]],
        "ccRecipients": [make_recipient(a) for a in data["cc"]],
        "isRead": True,
        # PR_MESSAGE_FLAGS (0x0E07) = 1 → read, NOT draft (without MSGFLAG_UNSENT=0x08)
        "singleValueExtendedProperties": [
            {
                "id": "Integer 0x0E07",
                "value": "1",
            }
        ],
    }

    if data["received"]:
        # Graph API expects ISO 8601 UTC format
        from datetime import datetime, timezone
        try:
            from dateutil import parser as dtparser
            dt = dtparser.parse(data["received"])
            payload["receivedDateTime"] = dt.astimezone(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
        except Exception as e:
            print(f"  Warning: cannot parse date '{data['received']}': {e}")

    if data["attachments"]:
        payload["attachments"] = data["attachments"]

    # Find target folder (Inbox/JNJ)
    folder_url = f"{GRAPH_URL}/users/{MAILBOX}/mailFolders/Inbox/childFolders"
    r_folders = requests.get(folder_url, headers=headers, timeout=15)
    folder_id = None
    for f in r_folders.json().get("value", []):
        if f["displayName"].lower() == TARGET_FOLDER.lower():
            folder_id = f["id"]
            break

    if not folder_id:
        # Create the folder if it doesn't exist
        r_create = requests.post(
            folder_url, headers=headers,
            json={"displayName": TARGET_FOLDER}, timeout=15
        )
        folder_id = r_create.json()["id"]
        print(f"  Created folder '{TARGET_FOLDER}'")

    url = f"{GRAPH_URL}/users/{MAILBOX}/mailFolders/{folder_id}/messages"
    print(f"\nPOST -> Inbox/{TARGET_FOLDER}")

    r = requests.post(url, headers=headers, json=payload, timeout=30)

    if r.status_code in (200, 201):
        msg_id = r.json().get("id", "?")
        print(f"  OK! Message created, id={msg_id[:40]}...")
        return r.json()
    else:
        print(f"  FAILED [{r.status_code}]: {r.text[:500]}")
        return None


if __name__ == "__main__":
    path = sys.argv[1] if len(sys.argv) > 1 else MSG_PATH
    import_msg(Path(path))