import { apiRequest } from './services/session'

export const getHealth = () => apiRequest<{status:string}>('/api/health')
export const askQuestion = (question:string) => apiRequest<{answer:string;status:string;sources:{title:string;source_url?:string|null}[]}>('/api/chat',{method:'POST',body:JSON.stringify({question})})
export const getKnowledge = () => apiRequest<{id:number;title:string;category:string;content:string;source_url:string|null;verification_status:string;version:number}[]>('/api/knowledge')
export const createKnowledge = (payload:{title:string;category:string;content:string;source_url?:string}) => apiRequest('/api/knowledge',{method:'POST',body:JSON.stringify(payload)},true)

export type VerificationStatus='pending'|'verified'|'rejected'
export type SourceItem={id:number;version:number;name:string;source_url:string|null;notes:string;created_at:string}
export function getSources(q=''){return apiRequest<{items:SourceItem[];total:number}>(`/api/sources?q=${encodeURIComponent(q)}`)}
export function createSource(payload:{name:string;source_url?:string;notes:string}){return apiRequest<SourceItem>('/api/sources',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(payload)},true)}
export function reviewKnowledge(id:number,payload:{expected_version:number;verification_status:VerificationStatus;reviewer:string;verification_notes:string}){return apiRequest(`/api/knowledge/${id}/review`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(payload)},true)}

export type RetrievalHit={rank:number;knowledge_id:number;knowledge_version:number;document_id:number|null;document_version:number|null;source_id:number|null;source_version:number|null;source_name:string|null;source_url:string;title:string;category:string;snippet:string;snippet_start:number;snippet_end:number;score:number;matched_terms:string[]}
export type RetrievalResult={run_id:string;query:string;mode:'keyword';status:'ok'|'no_evidence';top_k:number;category:string|null;query_terms:string[];corpus_size:number;corpus_fingerprint:string;total_hits:number;results:RetrievalHit[];elapsed_ms:number;created_at:string;config:{tokenizer:string;scorer:string;k1:number;b:number;title_weight:number;stopwords_version:string}}
export function retrieveKnowledge(payload:{query:string;mode?:'keyword';top_k?:number;category?:string}){return apiRequest<RetrievalResult>('/api/retrieval',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(payload)})}
export function getRetrievalRun(runId:string){return apiRequest<RetrievalResult>(`/api/retrieval/runs/${encodeURIComponent(runId)}`)}
export function getRetrievalRuns(page=1,pageSize=20){return apiRequest<{items:RetrievalResult[];total:number;page:number;page_size:number}>(`/api/retrieval/runs?page=${page}&page_size=${pageSize}`)}

export type VectorRetrievalResult=Omit<RetrievalResult,'mode'|'results'|'config'> & {mode:'vector';vector_version_id:string;text_index_version_id:string;generation:number;text_generation:number;results:(RetrievalHit & {chunk_id:string;chunk_ordinal:number})[];config:{scorer:'pgvector-cosine-exact-v1';ranking_unit:'chunk';space:{id:string;dimension:number}}}
export function retrieveVectorKnowledge(payload:{query:string;top_k?:number;category?:string}){return apiRequest<VectorRetrievalResult>('/api/retrieval/vector',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({mode:'vector',top_k:5,...payload})})}