import traceback
import uuid
from typing import Any
from mimetypes import guess_type

from fastapi import APIRouter, Body, Depends, HTTPException, Query, UploadFile, File
from fastapi.responses import FileResponse, StreamingResponse
from pydantic import BaseModel, Field
from sqlalchemy.ext.asyncio import AsyncSession

from yuxi.storage.postgres.models_business import User
from server.utils.auth_middleware import get_db, get_required_user
from yuxi import config as conf
from yuxi.models import select_model
from yuxi.services.chat_service import get_agent_state_view, stream_agent_resume
from yuxi.repositories.conversation_repository import ConversationRepository
from yuxi.services.conversation_service import (
    confirm_tmp_thread_attachments_view,
    create_thread_view,
    delete_thread_attachment_view,
    delete_thread_view,
    get_thread_history_view,
    list_thread_attachments_view,
    list_threads_view,
    parse_tmp_attachment_view,
    update_thread_view,
    upload_thread_attachment_view,
    upload_tmp_attachment_view,
)
from yuxi.services.thread_files_service import (
    list_thread_files_view,
    read_thread_file_content_view,
    resolve_thread_artifact_view,
    save_thread_artifact_to_workspace_view,
)
from yuxi.services.feedback_service import get_message_feedback_view, submit_message_feedback_view
from yuxi.utils.logging_config import logger
from yuxi.utils.image_processor import process_uploaded_image
from yuxi.utils.paths import VIRTUAL_PATH_PREFIX


# TODO：当前文件的功能过于庞杂，路由标签混乱


# 图片上传响应模型
class ImageUploadResponse(BaseModel):
    success: bool
    image_content: str | None = None
    thumbnail_content: str | None = None
    width: int | None = None
    height: int | None = None
    format: str | None = None
    mime_type: str | None = None
    size_bytes: int | None = None
    error: str | None = None


chat = APIRouter(prefix="/chat", tags=["chat"])


@chat.post("/call")
async def call(query: str = Body(...), meta: dict = Body(None), current_user: User = Depends(get_required_user)):
    """调用模型进行简单问答（需要登录）"""
    meta = meta or {}

    # 确保 request_id 存在
    if "request_id" not in meta or not meta.get("request_id"):
        meta["request_id"] = str(uuid.uuid4())

    model = select_model(model_spec=meta.get("model_spec") or meta.get("model") or conf.default_model)

    response = await model.call(query)
    logger.debug({"query": query, "response": response.content})

    return {"response": response.content, "request_id": meta["request_id"]}


@chat.post("/thread/{thread_id}/resume")
async def resume_thread_chat(
    thread_id: str,
    approved: bool | None = Body(None),
    answer: dict | None = Body(None),
    current_user: User = Depends(get_required_user),
    db: AsyncSession = Depends(get_db),
):
    """恢复被人工审批中断的对话（需要登录）"""

    # 验证 thread 存在且属于当前用户
    conv_repo = ConversationRepository(db)
    conversation = await conv_repo.get_conversation_by_thread_id(thread_id)
    if not conversation or conversation.uid != str(current_user.uid) or conversation.status == "deleted":
        raise HTTPException(status_code=404, detail="对话线程不存在")
    agent_id = conversation.agent_id

    def normalize_resume_input(raw_answer: Any, raw_approved: bool | None) -> Any:
        def normalize_single_answer(value: Any) -> Any:
            if isinstance(value, str):
                normalized = value.strip()
                if not normalized:
                    raise HTTPException(status_code=422, detail="answer 不能为空")
                return normalized

            if isinstance(value, list):
                if len(value) == 0:
                    raise HTTPException(status_code=422, detail="answer 不能为空")

                normalized_list: list[str] = []
                for item in value:
                    if not isinstance(item, str) or not item.strip():
                        raise HTTPException(status_code=422, detail="answer 列表必须是非空字符串")
                    normalized_list.append(item.strip())
                return normalized_list

            if isinstance(value, dict):
                if value.get("type") == "other":
                    text = value.get("text")
                    if not isinstance(text, str) or not text.strip():
                        raise HTTPException(status_code=422, detail="other 文本不能为空")
                return value

            raise HTTPException(status_code=422, detail="answer 值类型不支持")

        if raw_answer is not None:
            if isinstance(raw_answer, dict):
                if len(raw_answer) == 0:
                    raise HTTPException(status_code=422, detail="answer 不能为空")

                normalized_answers: dict[str, Any] = {}
                for question_id, value in raw_answer.items():
                    normalized_question_id = str(question_id).strip()
                    if not normalized_question_id:
                        raise HTTPException(status_code=422, detail="question_id 不能为空")
                    normalized_answers[normalized_question_id] = normalize_single_answer(value)
                return normalized_answers

            raise HTTPException(status_code=422, detail="answer 必须是对象映射 {question_id: answer}")

        if raw_approved is not None:
            return "approve" if raw_approved else "reject"

        raise HTTPException(status_code=422, detail="approved 或 answer 至少提供一个")

    resume_input = normalize_resume_input(answer, approved)

    logger.info(
        "Resuming agent_id: %s, thread_id: %s, approved: %s, answer_type: %s",
        agent_id,
        thread_id,
        approved,
        type(answer).__name__ if answer is not None else "None",
    )

    meta = {
        "agent_id": agent_id,
        "thread_id": thread_id,
        "uid": current_user.uid,
        "approved": approved,
        "answer": answer,
        "resume_input": resume_input,
    }
    if "request_id" not in meta or not meta.get("request_id"):
        meta["request_id"] = str(uuid.uuid4())
    return StreamingResponse(
        stream_agent_resume(
            thread_id=thread_id,
            resume_input=resume_input,
            meta=meta,
            current_user=current_user,
            db=db,
        ),
        media_type="application/json",
    )


@chat.get("/thread/{thread_id}/history")
async def get_thread_history(
    thread_id: str, current_user: User = Depends(get_required_user), db: AsyncSession = Depends(get_db)
):
    """获取对话历史消息（需要登录）- 包含用户反馈状态"""
    try:
        return await get_thread_history_view(
            thread_id=thread_id,
            current_uid=str(current_user.uid),
            db=db,
        )

    except Exception as e:
        logger.error(f"获取对话历史消息出错: {e}, {traceback.format_exc()}")
        raise HTTPException(status_code=500, detail=f"获取对话历史消息出错: {str(e)}")


@chat.get("/thread/{thread_id}/state")
async def get_thread_state(
    thread_id: str,
    include_messages: bool = Query(False),
    current_user: User = Depends(get_required_user),
    db: AsyncSession = Depends(get_db),
):
    """获取对话当前状态（需要登录）"""
    try:
        return await get_agent_state_view(
            thread_id=thread_id,
            current_uid=str(current_user.uid),
            db=db,
            include_messages=include_messages,
        )
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"获取对话状态出错: {e}, {traceback.format_exc()}")
        raise HTTPException(status_code=500, detail=f"获取对话状态出错: {str(e)}")


# ==================== 线程管理 API ====================


class ThreadCreate(BaseModel):
    title: str | None = None
    agent_id: str
    metadata: dict | None = None


class ThreadResponse(BaseModel):
    id: str
    uid: str
    agent_id: str
    title: str | None = None
    is_pinned: bool = False
    created_at: str
    updated_at: str
    metadata: dict[str, Any] = Field(default_factory=dict)


class AttachmentResponse(BaseModel):
    file_id: str
    file_name: str
    file_type: str | None = None
    file_size: int
    status: str
    uploaded_at: str
    path: str
    artifact_url: str | None = None
    original_path: str | None = None
    original_artifact_url: str | None = None
    minio_url: str | None = None
    request_id: str | None = None


class AttachmentLimits(BaseModel):
    allowed_extensions: list[str]
    max_size_bytes: int


class AttachmentListResponse(BaseModel):
    attachments: list[AttachmentResponse]
    limits: AttachmentLimits


class TmpAttachmentResponse(BaseModel):
    tmp_file_id: str
    file_name: str
    file_type: str | None = None
    file_size: int
    bucket_name: str
    object_name: str
    minio_url: str
    uploaded_at: str
    parse_supported: bool = False
    parse_methods: list[str] = Field(default_factory=list)


class TmpAttachmentParseRequest(BaseModel):
    object_name: str
    file_name: str
    parse_method: str | None = None
    bucket_name: str | None = None


class TmpAttachmentParseResponse(BaseModel):
    tmp_file_id: str
    file_name: str
    bucket_name: str
    object_name: str
    parsed_object_name: str
    parsed_minio_url: str
    parse_method: str
    status: str
    truncated: bool = False


class TmpAttachmentConfirmItem(BaseModel):
    file_name: str
    file_type: str | None = None
    bucket_name: str
    object_name: str
    parsed_object_name: str | None = None
    truncated: bool = False


class TmpAttachmentConfirmRequest(BaseModel):
    attachments: list[TmpAttachmentConfirmItem]


class TmpAttachmentConfirmResponse(BaseModel):
    attachments: list[AttachmentResponse]


class ThreadFileEntry(BaseModel):
    path: str
    name: str
    is_dir: bool
    size: int
    modified_at: str | None = None
    artifact_url: str | None = None


class ThreadFileListResponse(BaseModel):
    path: str
    files: list[ThreadFileEntry]


class ThreadFileContentResponse(BaseModel):
    path: str
    content: list[str]
    offset: int
    limit: int
    total_lines: int
    artifact_url: str


class SaveThreadArtifactRequest(BaseModel):
    path: str


class SaveThreadArtifactResponse(BaseModel):
    name: str
    source_path: str
    saved_path: str
    saved_artifact_url: str


# =============================================================================
# > === 会话管理分组 ===
# =============================================================================


@chat.post("/thread", response_model=ThreadResponse)
async def create_thread(
    thread: ThreadCreate, db: AsyncSession = Depends(get_db), current_user: User = Depends(get_required_user)
):
    """创建新对话线程 (使用新存储系统)"""
    return await create_thread_view(
        agent_id=thread.agent_id,
        title=thread.title,
        metadata=thread.metadata,
        db=db,
        current_uid=str(current_user.uid),
    )


@chat.get("/threads", response_model=list[ThreadResponse])
async def list_threads(
    agent_id: str | None = Query(None),
    limit: int = Query(100, ge=1, le=500),
    offset: int = Query(0, ge=0),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """获取用户的所有对话线程 (使用新存储系统)"""
    return await list_threads_view(
        agent_id=agent_id, db=db, current_uid=str(current_user.uid), limit=limit, offset=offset
    )


@chat.delete("/thread/{thread_id}")
async def delete_thread(
    thread_id: str, db: AsyncSession = Depends(get_db), current_user: User = Depends(get_required_user)
):
    """删除对话线程 (使用新存储系统)"""
    return await delete_thread_view(thread_id=thread_id, db=db, current_uid=str(current_user.uid))


class ThreadUpdate(BaseModel):
    title: str | None = None
    is_pinned: bool | None = None


@chat.put("/thread/{thread_id}", response_model=ThreadResponse)
async def update_thread(
    thread_id: str,
    thread_update: ThreadUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """更新对话线程信息 (使用新存储系统)"""
    return await update_thread_view(
        thread_id=thread_id,
        title=thread_update.title,
        is_pinned=thread_update.is_pinned,
        db=db,
        current_uid=str(current_user.uid),
    )


# ================================
# > === 附件管理分组 ===
# ================================


@chat.post("/attachments/tmp", response_model=TmpAttachmentResponse)
async def upload_tmp_attachment(file: UploadFile = File(...), current_user: User = Depends(get_required_user)):
    """上传附件到 MinIO tmp，暂不关联线程。"""
    return await upload_tmp_attachment_view(file=file, current_uid=str(current_user.uid))


@chat.post("/attachments/tmp/parse", response_model=TmpAttachmentParseResponse)
async def parse_tmp_attachment(
    request: TmpAttachmentParseRequest,
    current_user: User = Depends(get_required_user),
):
    """解析 tmp 附件并返回解析后的 tmp URL。"""
    return await parse_tmp_attachment_view(
        object_name=request.object_name,
        file_name=request.file_name,
        parse_method=request.parse_method,
        bucket_name=request.bucket_name,
        current_uid=str(current_user.uid),
    )


@chat.post("/thread/{thread_id}/attachments/confirm", response_model=TmpAttachmentConfirmResponse)
async def confirm_tmp_thread_attachments(
    thread_id: str,
    request: TmpAttachmentConfirmRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """将 tmp 附件正式加入线程附件列表。"""
    return await confirm_tmp_thread_attachments_view(
        thread_id=thread_id,
        attachments=[item.model_dump() for item in request.attachments],
        db=db,
        current_uid=str(current_user.uid),
    )


@chat.post("/thread/{thread_id}/attachments", response_model=AttachmentResponse)
async def upload_thread_attachment(
    thread_id: str,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """上传原始附件并关联到指定对话线程。"""
    return await upload_thread_attachment_view(
        thread_id=thread_id,
        file=file,
        db=db,
        current_uid=str(current_user.uid),
    )


@chat.get("/thread/{thread_id}/attachments", response_model=AttachmentListResponse)
async def list_thread_attachments(
    thread_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """列出当前对话线程的所有附件元信息。"""
    return await list_thread_attachments_view(
        thread_id=thread_id,
        db=db,
        current_uid=str(current_user.uid),
    )


@chat.delete("/thread/{thread_id}/attachments/{file_id}")
async def delete_thread_attachment(
    thread_id: str,
    file_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """移除指定附件。"""
    return await delete_thread_attachment_view(
        thread_id=thread_id,
        file_id=file_id,
        db=db,
        current_uid=str(current_user.uid),
    )


@chat.get("/thread/{thread_id}/files", response_model=ThreadFileListResponse)
async def list_thread_files(
    thread_id: str,
    path: str = Query(f"{VIRTUAL_PATH_PREFIX}"),
    recursive: bool = Query(False),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """列出线程文件目录。"""
    return await list_thread_files_view(
        thread_id=thread_id,
        current_uid=str(current_user.uid),
        db=db,
        path=path,
        recursive=recursive,
    )


@chat.get("/thread/{thread_id}/files/content", response_model=ThreadFileContentResponse)
async def read_thread_file_content(
    thread_id: str,
    path: str = Query(...),
    offset: int = Query(0, ge=0),
    limit: int = Query(2000, ge=1, le=5000),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """读取线程文本文件（按行分页）。"""
    return await read_thread_file_content_view(
        thread_id=thread_id,
        current_uid=str(current_user.uid),
        db=db,
        path=path,
        offset=offset,
        limit=limit,
    )


@chat.get("/thread/{thread_id}/artifacts/{path:path}")
async def get_thread_artifact(
    thread_id: str,
    path: str,
    download: bool = Query(False),
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """下载或预览线程文件。"""
    file_path = await resolve_thread_artifact_view(
        thread_id=thread_id,
        current_uid=str(current_user.uid),
        db=db,
        path=path,
    )

    media_type = guess_type(file_path.name)[0] or "application/octet-stream"
    headers = {"Content-Disposition": f'attachment; filename="{file_path.name}"'} if download else None
    return FileResponse(path=file_path, media_type=media_type, headers=headers)


@chat.post("/thread/{thread_id}/artifacts/save", response_model=SaveThreadArtifactResponse)
async def save_thread_artifact_to_workspace(
    thread_id: str,
    request: SaveThreadArtifactRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """保存交付物到共享 workspace/saved_artifacts 目录。"""
    return await save_thread_artifact_to_workspace_view(
        thread_id=thread_id,
        current_uid=str(current_user.uid),
        db=db,
        path=request.path,
    )


# =============================================================================
# > === 消息反馈分组 ===
# =============================================================================


class MessageFeedbackRequest(BaseModel):
    rating: str  # 'like' or 'dislike'
    reason: str | None = None  # Optional reason for dislike


class MessageFeedbackResponse(BaseModel):
    id: int
    message_id: int
    rating: str
    reason: str | None
    created_at: str


@chat.post("/message/{message_id}/feedback", response_model=MessageFeedbackResponse)
async def submit_message_feedback(
    message_id: int,
    feedback_data: MessageFeedbackRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """提交消息反馈（需要登录）"""
    result = await submit_message_feedback_view(
        message_id=message_id,
        rating=feedback_data.rating,
        reason=feedback_data.reason,
        db=db,
        current_uid=str(current_user.uid),
    )
    return MessageFeedbackResponse(**result)


@chat.get("/message/{message_id}/feedback")
async def get_message_feedback(
    message_id: int,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_required_user),
):
    """获取指定消息的用户反馈（需要登录）"""
    return await get_message_feedback_view(
        message_id=message_id,
        db=db,
        current_uid=str(current_user.uid),
    )


# =============================================================================
# > === 多模态图片支持分组 ===
# =============================================================================


@chat.post("/image/upload", response_model=ImageUploadResponse)
async def upload_image(file: UploadFile = File(...), current_user: User = Depends(get_required_user)):
    """
    上传并处理图片，返回base64编码的图片数据
    """
    try:
        # 验证文件类型
        if not file.content_type or not file.content_type.startswith("image/"):
            raise HTTPException(status_code=400, detail="只支持图片文件上传")

        # 读取文件内容
        image_data = await file.read()

        # 检查文件大小（10MB限制，超过后会压缩到5MB）
        if len(image_data) > 10 * 1024 * 1024:
            raise HTTPException(status_code=400, detail="图片文件过大，请上传小于10MB的图片")

        # 处理图片
        result = process_uploaded_image(image_data, file.filename)

        if not result["success"]:
            raise HTTPException(status_code=400, detail=f"图片处理失败: {result['error']}")

        logger.info(
            f"用户 {current_user.id} 成功上传图片: {file.filename}, "
            f"尺寸: {result['width']}x{result['height']}, "
            f"格式: {result['format']}, "
            f"大小: {result['size_bytes']} bytes"
        )

        return ImageUploadResponse(**result)

    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"图片上传处理失败: {str(e)}, {traceback.format_exc()}")
        raise HTTPException(status_code=500, detail=f"图片处理失败: {str(e)}")