from django.utils import timezone
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse

from agent_core.orchestrator import run_agent
from agent_core.results import AgentResult
from apps.audit.services import create_audit_log, create_notification_record
from apps.documents.models import SubmissionBatch, UploadedDocument
from apps.scenarios.services import get_scenario

from .forms import ChatForm
from .models import Conversation


def index(request):
    conversations = Conversation.objects.all()
    if conversations.exists():
        return redirect("chat:detail", conversation_id=conversations.first().conversation_id)
    return render(
        request,
        "chat/index.html",
        {
            "conversation": None,
            "conversations": [],
            "form": ChatForm(),
            "documents": [],
            "result": None,
            "audit_log": None,
            "node_results": [],
            "active_node": None,
        },
    )


def detail(request, conversation_id: str):
    conversation = get_object_or_404(Conversation, conversation_id=conversation_id)
    batch = SubmissionBatch.objects.filter(batch_id=conversation.batch_id).first()
    documents = UploadedDocument.objects.filter(batch=batch)
    form = ChatForm(request.POST or None, documents=documents)
    result = None
    audit_log = None
    active_node = None
    task_modes = [
        {"name": "目录汇总", "description": "汇总文件、页数、章节点和目录型文档。"},
        {"name": "完整性检查", "description": "对照法规模板检查齐套性、缺失项和错放项。"},
        {"name": "字段抽取", "description": "抽取产品名称、规格、适用范围、储存条件等核心字段。"},
        {"name": "一致性核查", "description": "比较申请表、说明书和产品列表的字段一致性。"},
        {"name": "综合风险报告", "description": "形成高优先级问题、建议动作和责任人通知。"},
    ]
    if request.method == "POST" and form.is_valid():
        scenario = get_scenario("document_review")
        message = form.cleaned_data["message"]
        try:
            result = run_agent(
                scenario,
                message,
                options={
                    "conversation_id": conversation.conversation_id,
                    "batch_id": conversation.batch_id,
                    "product_name": conversation.product_name,
                    "document_ids": form.cleaned_data["document_ids"],
                },
            )
        except Exception as exc:
            result = AgentResult(status="failed", error=str(exc), answer="")
        audit_log = create_audit_log(
            "document_review",
            "注册审核智能体",
            message,
            result,
            batch_id=conversation.batch_id,
            conversation_id=conversation.conversation_id,
            product_name=conversation.product_name,
        )
        _apply_agent_result_to_conversation(conversation, result)
        _persist_notification_records(
            result,
            web_detail_url=reverse("audit:detail", args=[audit_log.id]),
        )
        active_node = "risk"
        conversation.refresh_from_db()
    workspace_summary = _build_workspace_summary(conversation, batch)

    return render(
        request,
        "chat/index.html",
        {
            "conversation": conversation,
            "conversations": Conversation.objects.all(),
            "batch": batch,
            "form": form,
            "documents": documents,
            "document_count": documents.count(),
            "result": result,
            "audit_log": audit_log,
            "task_modes": task_modes,
            "node_results": conversation.node_results,
            "active_node": active_node,
            "workspace_summary": workspace_summary,
        },
    )


def _persist_notification_records(result: AgentResult, *, web_detail_url: str = "") -> None:
    payload = result.notification_payload or {}
    owners = payload.get("owners") or []
    if not owners:
        return
    for owner in owners:
        create_notification_record(
            batch_id=payload.get("batch_id", ""),
            conversation_id=payload.get("conversation_id", ""),
            product_name=payload.get("product_name", ""),
            trigger_source="agent_execution",
            notify_reason=payload.get("notify_reason", "task_completed"),
            owner_role=owner.get("owner_role", ""),
            feishu_user_id=owner.get("feishu_user_id", ""),
            message_status="sent" if result.status == "success" else "failed",
            web_detail_url=web_detail_url,
            receipt={"status": result.status},
        )


def _build_workspace_summary(conversation: Conversation, batch: SubmissionBatch | None) -> dict:
    node_status_map = {node.get("label"): node.get("status", "") for node in conversation.node_results}
    risk_status = node_status_map.get("风险预警", "待处理")
    notify_status = node_status_map.get("飞书通知", "待处理")
    export_status = node_status_map.get("Word 回填导出", "待处理")
    highest_risk_level = "高" if risk_status in {"已阻断", "待复核"} else "中"
    export_allowed = "否" if risk_status in {"已阻断", "待复核"} else "是"
    return {
        "highest_risk_level": highest_risk_level,
        "export_allowed": export_allowed,
        "notify_status": notify_status,
        "export_status": export_status,
        "file_count": batch.file_count if batch else 0,
        "page_count": batch.page_count if batch else 0,
    }


def _apply_agent_result_to_conversation(conversation: Conversation, result: AgentResult) -> None:
    conversation.task_status = result.status
    if result.node_results:
        conversation.node_results = result.node_results
    conversation.latest_summary = {
        "answer": result.answer,
        "status": result.status,
        "error": result.error,
        "notification_payload": result.notification_payload,
    }
    conversation.last_run_at = timezone.now()
    conversation.save(
        update_fields=[
            "task_status",
            "node_results",
            "latest_summary",
            "last_run_at",
            "updated_at",
        ]
    )