"""Formal decode API routes."""
from __future__ import annotations

from typing import Any
from uuid import UUID

from fastapi import APIRouter, Body, Depends, HTTPException

from app.dependencies import _env_file, get_acquisition_repository, get_decode_repository
from app.schemas import (
    CandidateItemSchema,
    DecodeResultSchema,
    IngestItemRequest,
    IngestItemResponse,
    IngestItemResultSchema,
    IngestRecordSchema,
    KnowledgeParticleSchema,
    MediaAssetSchema,
    PayloadDraftSchema,
    ScopeResultSchema,
)
from core.config import IngestApiConfig
from decode_content.ingest import KnowledgeIngestClient, ingest_payload_draft

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


@router.get("/items/{item_id}/result", response_model=DecodeResultSchema)
def decode_result(
    item_id: UUID,
    repo: Any = Depends(get_decode_repository),
) -> DecodeResultSchema:
    getter = getattr(repo, "get_decode_result_for_item", None)
    if getter is None:
        raise HTTPException(status_code=501, detail="decode result reader is not implemented")
    return DecodeResultSchema.model_validate(getter(item_id))


@router.get("/items/{item_id}/detail")
def decode_item_detail(
    item_id: UUID,
    acquisition_repo: Any = Depends(get_acquisition_repository),
    decode_repo: Any = Depends(get_decode_repository),
) -> dict[str, Any]:
    try:
        item = acquisition_repo.get_candidate_item(item_id)
        media = acquisition_repo.list_media_assets_for_item(item_id)
    except Exception as exc:
        raise HTTPException(status_code=404, detail=f"candidate item not found: {exc}") from exc

    try:
        result = decode_repo.get_decode_result_for_item(item_id)
    except Exception as exc:
        result = None

    list_particles = getattr(decode_repo, "list_knowledge_particles", None)
    list_scopes = getattr(decode_repo, "list_scope_results", None)
    list_payloads = getattr(decode_repo, "list_payload_drafts", None)
    list_ingests = getattr(decode_repo, "list_ingest_records", None)

    raw_item = item.model_dump() if hasattr(item, "model_dump") else dict(item)
    item_payload = CandidateItemSchema.model_validate(
        {
            **raw_item,
            "media_assets": [
                MediaAssetSchema.model_validate(row).model_dump(mode="json")
                for row in media
            ],
        }
    ).model_dump(mode="json")
    return {
        "item": item_payload,
        "decode_result": (
            DecodeResultSchema.model_validate(result).model_dump(mode="json")
            if result is not None
            else None
        ),
        "knowledge_particles": [
            KnowledgeParticleSchema.model_validate(row).model_dump(mode="json")
            for row in (list_particles(item_id=item_id) if list_particles else [])
        ],
        "scope_results": [
            ScopeResultSchema.model_validate(row).model_dump(mode="json")
            for row in (list_scopes(item_id=item_id) if list_scopes else [])
        ],
        "payload_drafts": [
            PayloadDraftSchema.model_validate(row).model_dump(mode="json")
            for row in (list_payloads(item_id=item_id) if list_payloads else [])
        ],
        "ingest_records": [
            IngestRecordSchema.model_validate(row).model_dump(mode="json")
            for row in (list_ingests(item_id=item_id) if list_ingests else [])
        ],
    }


@router.post("/items/{item_id}/jobs")
def enqueue_decode_job(
    item_id: UUID,
    repo: Any = Depends(get_decode_repository),
) -> dict[str, Any]:
    create = getattr(repo, "create_decode_job", None)
    if create is None:
        raise HTTPException(status_code=501, detail="decode job writer is not implemented")
    job = create(item_id=item_id, status="pending")
    return {"job": job.model_dump(mode="json") if hasattr(job, "model_dump") else job}


@router.post("/items/{item_id}/ingest", response_model=IngestItemResponse)
def ingest_item_payloads(
    item_id: UUID,
    request: IngestItemRequest | None = Body(default=None),
    repo: Any = Depends(get_decode_repository),
) -> IngestItemResponse:
    request = request or IngestItemRequest()
    list_payloads = getattr(repo, "list_payload_drafts", None)
    if list_payloads is None:
        raise HTTPException(status_code=501, detail="payload draft reader is not implemented")
    drafts = list_payloads(item_id=item_id)
    client = None
    if not request.dry_run:
        config = IngestApiConfig.from_env(_env_file())
        if not config.url:
            raise HTTPException(status_code=400, detail="CK_INGEST_API_URL 未配置，真实 ingest 已关闭")
        client = KnowledgeIngestClient(config)

    records = []
    for draft in drafts:
        records.append(ingest_payload_draft(repo, draft, dry_run=request.dry_run, client=client))
    results = [
        IngestItemResultSchema(
            payload_draft_id=record.payload_draft_id,
            ingest_record=IngestRecordSchema.model_validate(record),
        )
        for record in records
    ]
    ingested_count = sum(1 for record in records if record.status == "ingested")
    failed_count = sum(1 for record in records if record.status == "failed")
    return IngestItemResponse(
        item_id=item_id,
        dry_run=request.dry_run,
        total=len(drafts),
        ingested_count=ingested_count,
        failed_count=failed_count,
        results=results,
    )