"""内容提交路由"""
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from typing import List, Optional
from datetime import date
from database import get_db
from models import (
    User, Submission, SubmissionHistory, Project, ProjectMilestone,
    PhaseGroup, WorkType, ContentType, SubmitTo, CONTENT_PHASE_MAP
)
from datetime import timedelta
from schemas import SubmissionCreate, SubmissionUpdate, SubmissionOut
from auth import get_current_user, require_permission

router = APIRouter(prefix="/api/submissions", tags=["内容提交"])


def submission_to_out(s: Submission) -> SubmissionOut:
    return SubmissionOut(
        id=s.id, user_id=s.user_id,
        user_name=s.user.name if s.user else None,
        project_id=s.project_id,
        project_name=s.project.name if s.project else None,
        project_phase=s.project_phase.value if hasattr(s.project_phase, 'value') else s.project_phase,
        work_type=s.work_type.value if hasattr(s.work_type, 'value') else s.work_type,
        content_type=s.content_type.value if hasattr(s.content_type, 'value') else s.content_type,
        duration_minutes=s.duration_minutes,
        duration_seconds=s.duration_seconds,
        total_seconds=s.total_seconds,
        hours_spent=s.hours_spent,
        submit_to=s.submit_to.value if hasattr(s.submit_to, 'value') else s.submit_to,
        description=s.description,
        submit_date=s.submit_date,
        milestone_name=s.milestone.name if s.milestone else None,
        delay_reason=s.delay_reason,
        episode_number=s.episode_number,
        created_at=s.created_at,
    )


@router.get("", response_model=List[SubmissionOut])
def list_submissions(
    project_id: Optional[int] = Query(None),
    user_id: Optional[int] = Query(None),
    start_date: Optional[date] = Query(None),
    end_date: Optional[date] = Query(None),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    q = db.query(Submission)
    # 权限检查：没有 user:view 权限只能看自己的
    if not current_user.has_permission("user:view"):
        q = q.filter(Submission.user_id == current_user.id)
    elif user_id:
        # 有权限且指定了用户，过滤该用户
        q = q.filter(Submission.user_id == user_id)
    # 项目筛选
    if project_id:
        q = q.filter(Submission.project_id == project_id)
    if start_date:
        q = q.filter(Submission.submit_date >= start_date)
    if end_date:
        q = q.filter(Submission.submit_date <= end_date)
    subs = q.order_by(Submission.submit_date.desc(), Submission.created_at.desc()).all()
    return [submission_to_out(s) for s in subs]


@router.post("")
def create_submission(
    req: SubmissionCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    # 代人提交：有 submission:proxy 权限时可以指定 user_id
    target_user_id = current_user.id
    if req.user_id and req.user_id != current_user.id:
        if not current_user.has_permission("submission:proxy"):
            raise HTTPException(status_code=403, detail="没有代人提交权限")
        target_user = db.query(User).filter(User.id == req.user_id).first()
        if not target_user:
            raise HTTPException(status_code=404, detail="目标用户不存在")
        target_user_id = req.user_id

    # 必填校验
    if not req.description or not req.description.strip():
        raise HTTPException(status_code=422, detail="请填写描述")
    if req.hours_spent is None or req.hours_spent <= 0:
        raise HTTPException(status_code=422, detail="请填写投入时长")

    # 产出时长校验：前期内容不需要，中期/后期内容必须 > 0
    NO_DURATION_TYPES = {'策划案', '大纲/梗概', '概念设计图', '测试片', '剧本', '分镜', '人设图', '场景图', '道具图', '培训', '招聘面试', '内部其他'}
    content_val = req.content_type.value if hasattr(req.content_type, 'value') else req.content_type
    if content_val not in NO_DURATION_TYPES:
        total_secs = (req.duration_minutes or 0) * 60 + (req.duration_seconds or 0)
        if total_secs <= 0:
            raise HTTPException(status_code=422, detail="请填写产出时长")

    # 确定集数列表
    from models import PROJECT_LEVEL_TYPES
    content_val = req.content_type.value if hasattr(req.content_type, 'value') else req.content_type
    if content_val in PROJECT_LEVEL_TYPES:
        episode_list = [None]  # 项目级，单条无集数
    elif req.episode_numbers and len(req.episode_numbers) > 0:
        episode_list = req.episode_numbers  # 批量多集
    elif req.episode_number is not None:
        episode_list = [req.episode_number]  # 单集（含0=全集通用）
    else:
        raise HTTPException(status_code=422, detail="请选择集数")

    # 校验项目存在
    project = db.query(Project).filter(Project.id == req.project_id).first()
    if not project:
        raise HTTPException(status_code=404, detail="项目不存在")

    # 自动计算总秒数（每集）
    total_seconds = (req.duration_minutes or 0) * 60 + (req.duration_seconds or 0)

    # 自动关联里程碑
    milestone_id = None
    content_val = req.content_type
    if content_val in CONTENT_PHASE_MAP:
        ms = db.query(ProjectMilestone).filter(
            ProjectMilestone.project_id == req.project_id,
            ProjectMilestone.name == content_val,
        ).first()
        if ms:
            milestone_id = ms.id
            if ms.estimated_days and ms.start_date:
                expected_end = ms.start_date + timedelta(days=ms.estimated_days)
                if req.submit_date > expected_end and not req.delay_reason:
                    raise HTTPException(
                        status_code=422,
                        detail=f"里程碑「{ms.name}」已超期（预估{ms.estimated_days}天），请填写延期原因"
                    )

    # 投入时长平均分配到每集
    ep_count = len(episode_list)
    hours_per_ep = round(req.hours_spent / ep_count, 2)

    results = []
    for ep in episode_list:
        sub = Submission(
            user_id=target_user_id,
            project_id=req.project_id,
            project_phase=PhaseGroup(req.project_phase),
            work_type=WorkType(req.work_type),
            content_type=ContentType(req.content_type),
            duration_minutes=req.duration_minutes or 0,
            duration_seconds=req.duration_seconds or 0,
            total_seconds=total_seconds,
            hours_spent=hours_per_ep,
            submit_to=SubmitTo(req.submit_to),
            description=req.description,
            submit_date=req.submit_date,
            milestone_id=milestone_id,
            delay_reason=req.delay_reason,
            episode_number=ep,
        )
        db.add(sub)
        results.append(sub)
    db.commit()
    for s in results:
        db.refresh(s)

    if len(results) == 1:
        return submission_to_out(results[0])
    return [submission_to_out(s) for s in results]


@router.put("/{submission_id}", response_model=SubmissionOut)
def update_submission(
    submission_id: int,
    req: SubmissionUpdate,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_permission("submission:create"))
):
    """高权限修改提交记录（需填写原因）"""
    sub = db.query(Submission).filter(Submission.id == submission_id).first()
    if not sub:
        raise HTTPException(status_code=404, detail="提交记录不存在")

    # 保存旧数据用于历史记录
    old_data = {
        "project_phase": sub.project_phase.value if hasattr(sub.project_phase, 'value') else sub.project_phase,
        "work_type": sub.work_type.value if hasattr(sub.work_type, 'value') else sub.work_type,
        "content_type": sub.content_type.value if hasattr(sub.content_type, 'value') else sub.content_type,
        "duration_minutes": sub.duration_minutes,
        "duration_seconds": sub.duration_seconds,
        "total_seconds": sub.total_seconds,
        "hours_spent": sub.hours_spent,
        "submit_to": sub.submit_to.value if hasattr(sub.submit_to, 'value') else sub.submit_to,
        "description": sub.description,
        "submit_date": str(sub.submit_date),
    }

    # 更新字段
    if req.project_id is not None:
        project = db.query(Project).filter(Project.id == req.project_id).first()
        if not project:
            raise HTTPException(status_code=404, detail="项目不存在")
        sub.project_id = req.project_id
    if req.project_phase is not None:
        sub.project_phase = PhaseGroup(req.project_phase)
    if req.work_type is not None:
        sub.work_type = WorkType(req.work_type)
    if req.content_type is not None:
        sub.content_type = ContentType(req.content_type)
    if req.duration_minutes is not None:
        sub.duration_minutes = req.duration_minutes
    if req.duration_seconds is not None:
        sub.duration_seconds = req.duration_seconds
    if req.hours_spent is not None:
        sub.hours_spent = req.hours_spent
    if req.submit_to is not None:
        sub.submit_to = SubmitTo(req.submit_to)
    if req.description is not None:
        sub.description = req.description
    if req.submit_date is not None:
        sub.submit_date = req.submit_date
    if req.episode_number is not None:
        sub.episode_number = req.episode_number

    # 重算总秒数
    sub.total_seconds = (sub.duration_minutes or 0) * 60 + (sub.duration_seconds or 0)

    # 产出时长校验：前期内容不需要，中期/后期内容必须 > 0
    NO_DURATION_TYPES = {'策划案', '大纲/梗概', '概念设计图', '测试片', '剧本', '分镜', '人设图', '场景图', '道具图', '培训', '招聘面试', '内部其他'}
    content_val = sub.content_type.value if hasattr(sub.content_type, 'value') else sub.content_type
    if content_val not in NO_DURATION_TYPES and sub.total_seconds <= 0:
        raise HTTPException(status_code=422, detail="请填写产出时长")

    # 保存新数据
    new_data = {
        "project_phase": sub.project_phase.value if hasattr(sub.project_phase, 'value') else sub.project_phase,
        "work_type": sub.work_type.value if hasattr(sub.work_type, 'value') else sub.work_type,
        "content_type": sub.content_type.value if hasattr(sub.content_type, 'value') else sub.content_type,
        "duration_minutes": sub.duration_minutes,
        "duration_seconds": sub.duration_seconds,
        "total_seconds": sub.total_seconds,
        "hours_spent": sub.hours_spent,
        "submit_to": sub.submit_to.value if hasattr(sub.submit_to, 'value') else sub.submit_to,
        "description": sub.description,
        "submit_date": str(sub.submit_date),
    }

    # 写入修改历史
    history = SubmissionHistory(
        submission_id=sub.id,
        changed_by=current_user.id,
        change_reason=req.change_reason,
        old_data=old_data,
        new_data=new_data,
    )
    db.add(history)
    db.commit()
    db.refresh(sub)
    return submission_to_out(sub)


@router.get("/{submission_id}/history")
def get_submission_history(
    submission_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_permission("submission:view"))
):
    """查看提交的修改历史"""
    records = db.query(SubmissionHistory).filter(
        SubmissionHistory.submission_id == submission_id
    ).order_by(SubmissionHistory.created_at.desc()).all()
    return [
        {
            "id": r.id,
            "changed_by": r.changed_by,
            "change_reason": r.change_reason,
            "old_data": r.old_data,
            "new_data": r.new_data,
            "created_at": r.created_at,
        }
        for r in records
    ]


@router.delete("/{submission_id}")
def delete_submission(
    submission_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_permission("submission:delete"))
):
    """删除提交记录（需要 submission:delete 权限）"""
    sub = db.query(Submission).filter(Submission.id == submission_id).first()
    if not sub:
        raise HTTPException(status_code=404, detail="提交记录不存在")
    # 同时删除关联的修改历史
    db.query(SubmissionHistory).filter(
        SubmissionHistory.submission_id == submission_id
    ).delete()
    db.delete(sub)
    db.commit()
    return {"detail": "删除成功"}


@router.get("/daily-hours")
def get_daily_hours(
    user_id: Optional[int] = Query(None),
    target_date: Optional[date] = Query(None, alias="date"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user)
):
    """查询指定用户某日已填工时"""
    from sqlalchemy import func

    uid = user_id or current_user.id
    # 非本人查询需要 proxy 权限
    if uid != current_user.id and not current_user.has_permission("submission:proxy"):
        raise HTTPException(status_code=403, detail="无权查看他人工时")

    d = target_date or date.today()
    filled = db.query(func.sum(Submission.hours_spent)).filter(
        Submission.user_id == uid,
        Submission.submit_date == d,
    ).scalar() or 0.0

    target = 8.0
    return {
        "filled": round(filled, 1),
        "target": target,
        "remaining": round(max(target - filled, 0), 1),
    }