"""Rehearsal library REST API — backed by SQLite via core.database.

Mirrors the IndexedDB API in rehearser.js:
  GET    /api/rehearsals          → { rehearsals: [...] }
  GET    /api/rehearsals/{id}     → record | 404
  PUT    /api/rehearsals/{id}     → full replace (id must exist)
  POST   /api/rehearsals          → insert (no id), returns { id }
  DELETE /api/rehearsals/{id}     → { ok: true }
  POST   /api/rehearsals/migrate  → bulk import from JS IndexedDB dump
"""
from __future__ import annotations

from fastapi import APIRouter, HTTPException, Request

from core.database import reh_get_all, reh_get, reh_put, reh_delete, reh_compact_titles

router = APIRouter()


@router.get("/api/rehearsals")
async def rehearsals_list():
    reh_compact_titles()
    return {"rehearsals": reh_get_all()}


@router.get("/api/rehearsals/{reh_id:int}")
async def rehearsals_get(reh_id: int):
    rec = reh_get(reh_id)
    if rec is None:
        raise HTTPException(404, "Rehearsal not found")
    return rec


@router.post("/api/rehearsals")
async def rehearsals_add(request: Request):
    try:
        body = await request.json()
    except Exception:
        raise HTTPException(400, "Invalid JSON")
    body.pop("id", None)
    saved = reh_put(body)
    return {"id": saved["id"]}


@router.put("/api/rehearsals/{reh_id:int}")
async def rehearsals_put(reh_id: int, request: Request):
    if reh_get(reh_id) is None:
        raise HTTPException(404, "Rehearsal not found")
    try:
        body = await request.json()
    except Exception:
        raise HTTPException(400, "Invalid JSON")
    body["id"] = reh_id
    reh_put(body)
    return {"ok": True}


@router.delete("/api/rehearsals/{reh_id:int}")
async def rehearsals_delete(reh_id: int):
    reh_delete(reh_id)
    return {"ok": True}


@router.post("/api/rehearsals/migrate")
async def rehearsals_migrate(request: Request):
    """Accept a batch of rehearsal records from the browser's IndexedDB dump."""
    try:
        body = await request.json()
    except Exception:
        raise HTTPException(400, "Invalid JSON")
    records = body if isinstance(body, list) else body.get("rehearsals", [])
    ids = []
    for rec in records:
        saved = reh_put(rec)
        ids.append(saved["id"])
    return {"imported": len(ids), "ids": ids}