"""
回忆录 feature — books / chapters / memoir-state 合并路由
"""
from app.core.logging import get_logger
from typing import List, Optional

from fastapi import APIRouter, Body, Depends, Query

from app.core.dependencies import get_current_user
from app.features.memoir.deps import get_memoir_service
from app.features.memoir.schemas import ExportPdfRequest, UpdateBookRequest
from app.features.memoir.service import MemoirService
from app.features.user.models import User

router = APIRouter(
    prefix="/api",
    tags=["memoir"],
    responses={
        401: {"description": "认证失败"},
        403: {"description": "权限不足"},
        404: {"description": "资源不存在"},
    },
)
logger = get_logger(__name__)


# ===========================================================================
# Books endpoints
# ===========================================================================


@router.get("/books/current")
async def get_current_book(
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """获取当前回忆录（需要认证）"""
    return await service.get_current_book(current_user.id)


@router.post("/books/clear-update")
async def clear_book_update(
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """清除回忆录更新标记"""
    return await service.clear_book_update(current_user.id)


@router.put("/books/{book_id}")
async def update_book(
    book_id: str,
    request: UpdateBookRequest = Body(...),
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """更新书籍标题（需要认证，只能更新自己的回忆录）"""
    return await service.update_book(book_id, current_user.id, request.title)


@router.post("/books/export-pdf")
async def export_pdf(
    request: ExportPdfRequest = Body(...),
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """导出 PDF（需要认证，只能导出自己的回忆录）"""
    return await service.export_pdf(current_user.id, request.book_id)


# ===========================================================================
# Chapters endpoints
# ===========================================================================


@router.get("/chapters", response_model=List[dict])
async def get_chapters(
    current_user: User = Depends(get_current_user),
    is_new: Optional[bool] = Query(None, description="仅返回未读章节"),
    service: MemoirService = Depends(get_memoir_service),
):
    """
    获取用户所有章节（需要认证，仅返回 active 章节）。
    始终返回全部 8 个预定义类别，没有内容的类别用占位符返回。
    """
    return await service.get_chapters(current_user.id, is_new=is_new)


@router.get("/chapters/{chapter_id}", response_model=dict)
async def get_chapter(
    chapter_id: str,
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """获取章节详情（需要认证，只能访问自己的章节）"""
    return await service.get_chapter(chapter_id, current_user.id)


@router.delete("/chapters/{chapter_id}")
async def disable_chapter(
    chapter_id: str,
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """清除章节（将章节标记为 disabled，需要认证，只能操作自己的章节）"""
    return await service.disable_chapter(chapter_id, current_user.id)


@router.post("/chapters/{chapter_id}/regenerate")
async def regenerate_chapter(
    chapter_id: str,
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """重新整理章节（需要认证，只能操作自己的章节）"""
    return await service.regenerate_chapter(chapter_id, current_user.id)


# ===========================================================================
# Memoir-state endpoints
# ===========================================================================


@router.get("/memoir-state")
async def get_memoir_state(
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """获取当前用户回忆录状态"""
    return await service.get_memoir_state(current_user.id)


@router.get("/memoir-state/next-question")
async def get_next_question_context(
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """获取下一步问题的上下文（当前阶段与空 slot）"""
    return await service.get_next_question_context(current_user.id)


@router.post("/memoir-state/mark-read")
async def mark_memoir_read(
    current_user: User = Depends(get_current_user),
    service: MemoirService = Depends(get_memoir_service),
):
    """标记回忆录更新已读"""
    return await service.mark_memoir_read(current_user.id)