"""LinkedIn API connector."""

from __future__ import annotations

import json
import logging

import requests

from messaging.models import StoredFile
from social.crypto import decrypt_tokens
from social.media import split_media

logger = logging.getLogger(__name__)


class LinkedInConnector:
    platform = "linkedin"

    def publish(self, post, target) -> str:
        tokens = json.loads(decrypt_tokens(target.account.encrypted_tokens) or "{}")
        access_token = tokens.get("access_token")
        author_urn = target.account.external_id or tokens.get("author_urn")
        if not access_token or not author_urn:
            raise RuntimeError("LinkedIn account missing access_token/author_urn")

        media = post.media if isinstance(post.media, list) else []
        images, videos = split_media(media)
        headers = {
            "Authorization": f"Bearer {access_token}",
            "X-Restli-Protocol-Version": "2.0.0",
            "Content-Type": "application/json",
        }

        if videos:
            raise RuntimeError(
                "LinkedIn video publish is not wired yet — attach images or post text-only."
            )

        if images:
            # Share first image (multi-image LinkedIn needs multi-image recipe).
            asset_urn = self._upload_image(
                access_token=access_token,
                author_urn=author_urn,
                image=images[0],
            )
            payload = {
                "author": author_urn,
                "lifecycleState": "PUBLISHED",
                "specificContent": {
                    "com.linkedin.ugc.ShareContent": {
                        "shareCommentary": {"text": post.body or ""},
                        "shareMediaCategory": "IMAGE",
                        "media": [
                            {
                                "status": "READY",
                                "description": {"text": post.body or ""},
                                "media": asset_urn,
                                "title": {"text": images[0].get("filename") or "Image"},
                            }
                        ],
                    }
                },
                "visibility": {
                    "com.linkedin.ugc.MemberNetworkVisibility": "PUBLIC"
                },
            }
        else:
            payload = {
                "author": author_urn,
                "lifecycleState": "PUBLISHED",
                "specificContent": {
                    "com.linkedin.ugc.ShareContent": {
                        "shareCommentary": {"text": post.body or ""},
                        "shareMediaCategory": "NONE",
                    }
                },
                "visibility": {
                    "com.linkedin.ugc.MemberNetworkVisibility": "PUBLIC"
                },
            }

        response = requests.post(
            "https://api.linkedin.com/v2/ugcPosts",
            json=payload,
            headers=headers,
            timeout=60,
        )
        if response.status_code >= 400:
            logger.warning(
                "LinkedIn publish failed: %s %s",
                response.status_code,
                response.text[:500],
            )
            raise RuntimeError(
                f"LinkedIn publish failed ({response.status_code}): {response.text[:400]}"
            )
        return str(response.headers.get("x-restli-id") or response.json().get("id") or "")

    def _upload_image(
        self, *, access_token: str, author_urn: str, image: dict
    ) -> str:
        file_id = image.get("id")
        if not file_id:
            raise RuntimeError("LinkedIn image missing StoredFile id")
        stored = StoredFile.objects.get(pk=file_id)
        binary = bytes(stored.data)

        register = requests.post(
            "https://api.linkedin.com/v2/assets?action=registerUpload",
            json={
                "registerUploadRequest": {
                    "recipes": ["urn:li:digitalmediaRecipe:feedshare-image"],
                    "owner": author_urn,
                    "serviceRelationships": [
                        {
                            "relationshipType": "OWNER",
                            "identifier": "urn:li:userGeneratedContent",
                        }
                    ],
                }
            },
            headers={
                "Authorization": f"Bearer {access_token}",
                "Content-Type": "application/json",
                "X-Restli-Protocol-Version": "2.0.0",
            },
            timeout=30,
        )
        if register.status_code >= 400:
            raise RuntimeError(
                f"LinkedIn image register failed ({register.status_code}): "
                f"{register.text[:400]}"
            )
        value = register.json().get("value") or {}
        asset = value.get("asset")
        upload_mech = (
            (value.get("uploadMechanism") or {}).get(
                "com.linkedin.digitalmedia.uploading.MediaUploadHttpRequest"
            )
            or {}
        )
        upload_url = upload_mech.get("uploadUrl")
        upload_headers = upload_mech.get("headers") or {}
        if not asset or not upload_url:
            raise RuntimeError("LinkedIn registerUpload missing asset/uploadUrl")

        put_headers = {"Authorization": f"Bearer {access_token}"}
        put_headers.update(upload_headers)
        put = requests.put(
            upload_url,
            data=binary,
            headers=put_headers,
            timeout=120,
        )
        if put.status_code >= 400:
            raise RuntimeError(
                f"LinkedIn image upload failed ({put.status_code}): {put.text[:400]}"
            )
        return str(asset)

    def refresh_token(self, account) -> None:
        logger.info("LinkedIn token refresh stub for %s", account.pk)