import type { WorkflowService } from '~/services/workflow-service'

const isEntityData = (value: unknown): value is { id: number } => {
    return Boolean(value && typeof value === 'object' && 'id' in value)
}

export function useWorkflowStoreLogic<TEntity extends { id: number }, TPayload>(
    service: WorkflowService<TEntity, TPayload>
) {
    const current = ref<TEntity | null>(null)
    const isLoading = ref(false)

    const setCurrent = (entity: TEntity | null) => {
        current.value = entity
    }

    const clearCurrent = () => {
        current.value = null
    }

    const load = async (id: number) => {
        isLoading.value = true
        const result = await service.get(id).finally(() => {
            isLoading.value = false
        })
        if (!isEntityData(result)) {
            current.value = null
            return null
        }
        current.value = result as any
        return result
    }

    const create = async (payload: TPayload) => {
        isLoading.value = true
        const result = await service.create(payload).finally(() => {
            isLoading.value = false
        })
        if (!isEntityData(result)) {
            return null
        }
        current.value = result as any
        return result
    }

    const update = async (id: number, payload: TPayload) => {
        isLoading.value = true
        const result = await service.update(id, payload).finally(() => {
            isLoading.value = false
        })
        if (!isEntityData(result)) {
            return null
        }
        current.value = result as any
        return result
    }

    return { current, isLoading, setCurrent, clearCurrent, load, create, update }
}