package cn.iocoder.yudao.module.ai.service.model;

import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.ai.controller.admin.model.vo.model.AiModelPageReqVO;
import cn.iocoder.yudao.module.ai.controller.admin.model.vo.model.AiModelSaveReqVO;
import cn.iocoder.yudao.module.ai.dal.dataobject.model.AiApiKeyDO;
import cn.iocoder.yudao.module.ai.dal.dataobject.model.AiModelDO;
import cn.iocoder.yudao.module.ai.dal.mysql.model.AiModelMapper;
import cn.iocoder.yudao.module.ai.enums.model.AiPlatformEnum;
import cn.iocoder.yudao.module.ai.framework.ai.core.model.AiModelFactory;
import jakarta.annotation.Resource;
import org.springframework.ai.chat.model.ChatModel;
import org.springframework.ai.embedding.EmbeddingModel;
import org.springframework.ai.vectorstore.VectorStore;
import org.springframework.ai.vectorstore.milvus.MilvusVectorStore;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;
import java.util.List;
import java.util.Map;
import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.module.ai.enums.ErrorCodeConstants.*;

@Service
@Validated
public class AiModelServiceImpl implements AiModelService {

    @Resource
    private AiApiKeyService apiKeyService;
    @Resource
    private AiModelMapper modelMapper;
    @Resource
    private AiModelFactory modelFactory;

    @Override
    public Long createModel(AiModelSaveReqVO createReqVO) {
        AiPlatformEnum.validatePlatform(createReqVO.getPlatform());
        apiKeyService.validateApiKey(createReqVO.getKeyId());
        AiModelDO model = BeanUtils.toBean(createReqVO, AiModelDO.class);
        modelMapper.insert(model);
        return model.getId();
    }

    @Override
    public void updateModel(AiModelSaveReqVO updateReqVO) {
        validateModelExists(updateReqVO.getId());
        AiPlatformEnum.validatePlatform(updateReqVO.getPlatform());
        apiKeyService.validateApiKey(updateReqVO.getKeyId());
        modelMapper.updateById(BeanUtils.toBean(updateReqVO, AiModelDO.class));
    }

    @Override
    public void deleteModel(Long id) {
        validateModelExists(id);
        modelMapper.deleteById(id);
    }

    @Override
    public AiModelDO getModel(Long id) {
        return modelMapper.selectById(id);
    }

    @Override
    public AiModelDO getRequiredDefaultModel(Integer type) {
        AiModelDO model = modelMapper.selectFirstByStatus(type, CommonStatusEnum.ENABLE.getStatus());
        if (model == null) throw exception(MODEL_DISABLE);
        return model;
    }

    @Override
    public PageResult<AiModelDO> getModelPage(AiModelPageReqVO pageReqVO) {
        return modelMapper.selectPage(pageReqVO);
    }

    @Override
    public AiModelDO validateModel(Long id) {
        AiModelDO model = validateModelExists(id);
        if (CommonStatusEnum.isDisable(model.getStatus())) throw exception(MODEL_DISABLE);
        return model;
    }

    @Override
    public List<AiModelDO> getModelListByStatusAndType(Integer status, Integer type, String platform) {
        return modelMapper.selectListByStatusAndType(status, type, platform);
    }

    private AiModelDO validateModelExists(Long id) {
        AiModelDO model = modelMapper.selectById(id);
        if (model == null) throw exception(MODEL_NOT_EXISTS);
        return model;
    }

    // ========== 与 Spring AI 集成 ==========

    @Override
    public ChatModel getChatModel(Long id) {
        AiModelDO model = validateModel(id);
        AiApiKeyDO apiKey = apiKeyService.validateApiKey(model.getKeyId());
        AiPlatformEnum platform = AiPlatformEnum.validatePlatform(apiKey.getPlatform());
        return modelFactory.getOrCreateChatModel(platform, apiKey.getApiKey(), apiKey.getUrl(), model.getModel());
    }

    @Override
    public VectorStore getOrCreateVectorStore(Long id, Map<String, Class<?>> metadataFields) {
        AiModelDO model = validateModel(id);
        AiApiKeyDO apiKey = apiKeyService.validateApiKey(model.getKeyId());
        AiPlatformEnum platform = AiPlatformEnum.validatePlatform(apiKey.getPlatform());

        EmbeddingModel embeddingModel = modelFactory.getOrCreateEmbeddingModel(
                platform, apiKey.getApiKey(), apiKey.getUrl(), model.getModel());

        return modelFactory.getOrCreateVectorStore(MilvusVectorStore.class, embeddingModel, metadataFields);
    }

}