"""
報告相關 Pydantic Schema
"""
from datetime import datetime, date
from typing import Optional, Literal
from pydantic import BaseModel, Field

from app.schemas.user import PaginationResponse


# ===== Article (簡化版) =====
class ArticleBrief(BaseModel):
    id: int
    title: str
    source_name: str
    url: str
    published_at: Optional[datetime] = None
    
    class Config:
        from_attributes = True


class ArticleInReport(ArticleBrief):
    is_included: bool = True


# ===== Report =====
class ReportBase(BaseModel):
    title: str = Field(..., max_length=200)


class ReportUpdate(BaseModel):
    title: Optional[str] = Field(None, max_length=200)
    edited_summary: Optional[str] = None
    article_selections: Optional[list[dict]] = None  # [{article_id: int, is_included: bool}]


class GroupBrief(BaseModel):
    id: int
    name: str
    category: str
    
    class Config:
        from_attributes = True


class ReportResponse(ReportBase):
    id: int
    report_date: date
    status: Literal["draft", "pending", "published", "delayed"]
    group: GroupBrief
    article_count: Optional[int] = 0
    published_at: Optional[datetime] = None
    
    class Config:
        from_attributes = True


class ReportDetailResponse(ReportResponse):
    ai_summary: Optional[str] = None
    edited_summary: Optional[str] = None
    articles: list[ArticleInReport] = []
    is_favorited: Optional[bool] = False
    comment_count: Optional[int] = 0
    created_at: datetime
    updated_at: datetime


class ReportReviewResponse(ReportResponse):
    """專員審核用"""
    ai_summary: Optional[str] = None
    edited_summary: Optional[str] = None
    articles: list[ArticleInReport] = []


class ReportListResponse(BaseModel):
    data: list[ReportResponse]
    pagination: PaginationResponse


class PublishResponse(BaseModel):
    published_at: datetime
    notifications_sent: int


class RegenerateSummaryResponse(BaseModel):
    ai_summary: str


# ===== Article Full =====
class ArticleSourceBrief(BaseModel):
    id: int
    name: str
    
    class Config:
        from_attributes = True


class ArticleResponse(BaseModel):
    id: int
    title: str
    source: ArticleSourceBrief
    url: str
    published_at: Optional[datetime] = None
    crawled_at: datetime
    
    class Config:
        from_attributes = True


class MatchedGroup(BaseModel):
    group_id: int
    group_name: str
    matched_keywords: list[str]


class ArticleDetailResponse(ArticleResponse):
    content: Optional[str] = None
    summary: Optional[str] = None
    author: Optional[str] = None
    matched_groups: list[MatchedGroup] = []


class ArticleListResponse(BaseModel):
    data: list[ArticleResponse]
    pagination: PaginationResponse