"""草稿管理路由.

端点：
- GET    /              获取草稿详情
- PUT    /              更新草稿
- POST   /publish       发布草稿到模板
- GET    /versions      模板版本历史
- POST   /rollback      回滚到指定版本
"""

from __future__ import annotations

from app.auth import AuthenticatedUser, get_current_user
from app.services.edit_plan_service import EditPlanService
from app.services.edit_template_service import EditTemplateService
from fastapi import APIRouter, Depends, HTTPException, Query, status

from .dependencies import get_draft_plan_id, get_editor_services
from .schemas import (
    EditorDraftResponse,
    EditorPublishResponse,
    EditorRollbackRequest,
    EditorRollbackResponse,
    EditorTemplateVersionItem,
    EditorUpdateRequest,
    EditorVersionListResponse,
)

router = APIRouter(tags=["Template Editor"])


@router.get("", response_model=EditorDraftResponse)
def get_editor_draft(
    template_id: str,
    plan_id: str = Depends(get_draft_plan_id),
    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
    _: AuthenticatedUser = Depends(get_current_user),
):
    """获取模板编辑器草稿详情

    首次访问时自动创建草稿。
    """
    _, plan_svc = services
    plan = plan_svc.get_plan_or_raise(plan_id)
    clips = plan_svc.list_clips(plan_id)
    return EditorDraftResponse(
        plan_id=plan.id,
        template_id=plan.template_id,
        name=plan.name,
        status=plan.status.value if hasattr(plan.status, "value") else str(plan.status),
        config=plan.config or {},
        total_duration=plan.total_duration,
        clip_count=len(clips),
    )


@router.put("", response_model=EditorDraftResponse)
def update_editor_draft(
    template_id: str,
    req: EditorUpdateRequest,
    plan_id: str = Depends(get_draft_plan_id),
    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
    _: AuthenticatedUser = Depends(get_current_user),
):
    """更新模板编辑器草稿"""
    _, plan_svc = services
    plan = plan_svc.update_plan(
        plan_id,
        name=req.name,
        config=req.config,
        total_duration=req.total_duration,
    )
    clips = plan_svc.list_clips(plan_id)
    return EditorDraftResponse(
        plan_id=plan.id,
        template_id=plan.template_id,
        name=plan.name,
        status=plan.status.value if hasattr(plan.status, "value") else str(plan.status),
        config=plan.config or {},
        total_duration=plan.total_duration,
        clip_count=len(clips),
    )


@router.post("/publish", response_model=EditorPublishResponse, status_code=status.HTTP_200_OK)
def publish_draft_to_template(
    template_id: str,
    plan_id: str = Depends(get_draft_plan_id),
    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
    _: AuthenticatedUser = Depends(get_current_user),
):
    """将草稿发布（同步）到正式模板

    草稿的 config 和 clips 会同步覆盖到模板，事务保证一致性。
    """
    tpl_svc, plan_svc = services
    try:
        tpl = tpl_svc.publish_template_from_draft(template_id, plan_id)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc

    clips = plan_svc.list_clips(plan_id)
    return EditorPublishResponse(
        template_id=tpl.id,
        status="published",
        clip_count=len(clips),
        version=tpl.version,
    )


@router.get("/versions", response_model=EditorVersionListResponse)
def list_template_versions(
    template_id: str,
    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
    _: AuthenticatedUser = Depends(get_current_user),
    limit: int = Query(default=50, ge=1, le=200),
):
    """查询模板发布版本历史"""
    tpl_svc, _ = services
    versions = tpl_svc.list_template_versions(template_id, limit=limit)
    items = [
        EditorTemplateVersionItem(
            version=v.version,
            name=v.name,
            editing_mode=v.editing_mode,
            clip_count=len(v.clip_configs),
            change_note=v.change_note,
            published_by=v.published_by,
            created_at=(
                v.created_at.isoformat()
                if hasattr(v.created_at, "isoformat")
                else str(v.created_at)
            ),
        )
        for v in versions
    ]
    return EditorVersionListResponse(versions=items, total=len(items))


@router.post("/rollback", response_model=EditorRollbackResponse, status_code=status.HTTP_200_OK)
def rollback_template(
    template_id: str,
    request: EditorRollbackRequest,
    services: tuple[EditTemplateService, EditPlanService] = Depends(get_editor_services),
    _: AuthenticatedUser = Depends(get_current_user),
):
    """回滚模板到指定历史版本

    回滚本身也是一次发布，版本号会 +1，可以再次回滚。
    """
    tpl_svc, _ = services
    try:
        tpl = tpl_svc.rollback_to_version(template_id, request.version)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc

    clip_configs = tpl_svc.list_clip_configs(template_id)
    return EditorRollbackResponse(
        template_id=tpl.id,
        status="rolled_back",
        rollback_to_version=request.version,
        new_version=tpl.version,
        clip_count=len(clip_configs),
    )