"""GET /api/voice-clips — 长语音 (voice_clip) list.

Read-only query over the mirrored ``voice_clip`` table. Powers the
``VoiceClipModal`` (微信长语音 / WA wavoicecalllist 共用的只读展示 modal).

Filters (all optional):

* ``user_id``         — exact employee-id match (modal opens from a CallList
  row keyed on the employee). Takes PRECEDENCE over ``user_real_name`` when
  both are given (the id is more precise).
* ``user_real_name``  — employee-name ILIKE / contains match (the 云客 modal's
  员工姓名 fuzzy filter). Ignored when ``user_id`` is present.
* ``channel``         — messaging channel (``wechat`` / ``whatsapp``).
* ``company_code``    — exact 企业串码 match.
* ``start`` / ``end`` — ms-epoch window compared against ``end_time`` (录音结束时间,
  inclusive) — mirrors the 云客 modal's 录音结束时间 range filter.

Ordered by ``end_time desc`` (nulls last) — most recent clips first, matching
the 云客 modal's default ordering.
"""

from __future__ import annotations

from typing import Annotated

import sqlalchemy as sa
from fastapi import APIRouter, Depends, Query
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.deps import get_session
from app.api.schemas import Page, VoiceClipOut
from app.db.models import VoiceClip

router = APIRouter(prefix="/api", tags=["voice_clips"])

SessionDep = Annotated[AsyncSession, Depends(get_session)]
PageParam = Annotated[int, Query(ge=1)]
PageSizeParam = Annotated[int, Query(ge=1, le=100)]


@router.get("/voice-clips")
async def list_voice_clips(
    session: SessionDep,
    page: PageParam = 1,
    page_size: PageSizeParam = 20,
    user_id: Annotated[str | None, Query()] = None,
    user_real_name: Annotated[str | None, Query()] = None,
    channel: Annotated[str | None, Query()] = None,
    company_code: Annotated[str | None, Query()] = None,
    start: Annotated[int | None, Query(ge=0)] = None,
    end: Annotated[int | None, Query(ge=0)] = None,
) -> Page[VoiceClipOut]:
    """List voice clips with optional filters, newest by recording end first."""
    conditions = []
    # user_id takes precedence over user_real_name (id is the more precise
    # filter; the 云客 modal switches between them based on whether the user
    # edited the staff-name box).
    if user_id is not None:
        conditions.append(VoiceClip.user_id == user_id)
    elif user_real_name is not None:
        conditions.append(VoiceClip.user_real_name.ilike(f"%{user_real_name}%"))
    if channel is not None:
        conditions.append(VoiceClip.channel == channel)
    if company_code is not None:
        conditions.append(VoiceClip.company_code == company_code)
    if start is not None:
        conditions.append(VoiceClip.end_time >= start)
    if end is not None:
        conditions.append(VoiceClip.end_time <= end)

    total_stmt = sa.select(sa.func.count()).select_from(VoiceClip)
    if conditions:
        total_stmt = total_stmt.where(*conditions)
    total = (await session.execute(total_stmt)).scalar_one()

    list_stmt = sa.select(VoiceClip)
    if conditions:
        list_stmt = list_stmt.where(*conditions)
    list_stmt = (
        list_stmt.order_by(
            sa.nullslast(VoiceClip.end_time.desc()),
            VoiceClip.voice_clip_id.asc(),
        )
        .limit(page_size)
        .offset((page - 1) * page_size)
    )
    rows = (await session.execute(list_stmt)).scalars().all()
    items = [VoiceClipOut.model_validate(row) for row in rows]
    return Page(items=items, total=total, page=page, page_size=page_size)