"""灵胚 API（镜生域，rewrite/1.0 M1）。对应 api-contracts.md §3.2。"""

from __future__ import annotations

import json

from fastapi import APIRouter, Depends, Request
from pydantic import BaseModel, Field

from app.api.v1.deps import get_current_user
from app.domains import jingsheng
from app.kernel import Kernel
from app.schemas.auth import CurrentUser

router = APIRouter(prefix="/embryo-drafts", tags=["jingsheng"])


class EmbryoCreate(BaseModel):
    source: str = Field(default="original", description="original/adopted/imported/serendipity")
    name: str = Field(min_length=1, max_length=120)
    description: str | None = Field(default=None, max_length=8000)
    identity_baseline: dict = Field(default_factory=dict, description="道体锚点草稿")


class EmbryoPatch(BaseModel):
    name: str | None = Field(default=None, min_length=1, max_length=120)
    description: str | None = Field(default=None, max_length=8000)
    identity_baseline: dict | None = None


class RehearseRequest(BaseModel):
    prompt: str = Field(min_length=1, max_length=8000)


def _embryo_view(embryo) -> dict:  # noqa: ANN001 — ORM 行
    return {
        "id": embryo.id,
        "status": embryo.status,
        "source": embryo.source,
        "name": embryo.name,
        "description": embryo.description,
        "identity_baseline": json.loads(embryo.identity_baseline_json or "{}"),
        "rehearsals": json.loads(embryo.rehearsals_json or "[]"),
        "created_at": embryo.created_at.isoformat(),
        "updated_at": embryo.updated_at.isoformat(),
    }


@router.get("")
async def list_embryo_drafts(user: CurrentUser = Depends(get_current_user)) -> list[dict]:
    return [_embryo_view(e) for e in await jingsheng.list_embryos(user.owner_scope)]


@router.post("", status_code=201)
async def create_embryo_draft(
    payload: EmbryoCreate, user: CurrentUser = Depends(get_current_user)
) -> dict:
    embryo = await jingsheng.create_embryo(
        owner_scope=user.owner_scope,
        source=payload.source,
        name=payload.name,
        description=payload.description,
        identity_baseline=payload.identity_baseline,
    )
    return _embryo_view(embryo)


@router.get("/{embryo_id}")
async def get_embryo_draft(
    embryo_id: str, user: CurrentUser = Depends(get_current_user)
) -> dict:
    return _embryo_view(await jingsheng.get_embryo(embryo_id, user.owner_scope))


@router.patch("/{embryo_id}")
async def patch_embryo_draft(
    embryo_id: str, payload: EmbryoPatch, user: CurrentUser = Depends(get_current_user)
) -> dict:
    embryo = await jingsheng.patch_embryo(
        embryo_id,
        user.owner_scope,
        name=payload.name,
        description=payload.description,
        identity_baseline=payload.identity_baseline,
    )
    return _embryo_view(embryo)


@router.post("/{embryo_id}/rehearse")
async def rehearse_embryo(
    embryo_id: str,
    payload: RehearseRequest,
    request: Request,
    user: CurrentUser = Depends(get_current_user),
) -> dict:
    """照心试演：幻境 Run，不产生人物经历；事件流经 /runs/{run_id}/stream。"""
    embryo = await jingsheng.get_embryo(embryo_id, user.owner_scope)
    if embryo.status == "activated":
        from app.core.errors import AppError

        raise AppError("HJ-1103", "灵胚已启镜，无需再试演。", status_code=409)
    kernel: Kernel | None = getattr(request.app.state, "kernel", None)
    if kernel is None:
        from app.core.errors import AppError

        raise AppError("service_unavailable", "Kernel 运行时未就绪。", status_code=503)

    baseline = json.loads(embryo.identity_baseline_json or "{}")
    system_contract = (
        f"你是一位尚未降生的灵胚「{embryo.name}」，正在幻境中试演。"
        f"身份锚点：{json.dumps(baseline, ensure_ascii=False)}"
    )
    run = await kernel.start_rehearsal_run(
        embryo_id=embryo_id, prompt=payload.prompt, system_contract=system_contract,
        owner_id=user.owner_scope,
    )
    await jingsheng.record_rehearsal(
        embryo_id, user.owner_scope, run_id=run.id, prompt=payload.prompt
    )
    return {"run_id": run.id, "kind": "rehearsal"}


@router.post("/{embryo_id}/activate")
async def activate_embryo_draft(
    embryo_id: str, user: CurrentUser = Depends(get_current_user)
) -> dict:
    """启镜：签发正式人物 ID、魂籍、执镜关系与命台。"""
    character = await jingsheng.activate_embryo(embryo_id, user.owner_scope)
    return {
        "character_id": character.id,
        "name": character.name,
        "status": character.status,
        "source": character.source,
        "identity_record_version": 1,
    }


@router.post("/{embryo_id}/abandon", status_code=204)
async def abandon_embryo_draft(
    embryo_id: str, user: CurrentUser = Depends(get_current_user)
) -> None:
    await jingsheng.abandon_embryo(embryo_id, user.owner_scope)