import {z} from 'zod'

export type GetApiApiV1ContextIdInspectArgs = {context_id: string, ref: string, asOf?: string | undefined, atInstant?: string | undefined, validFrom?: string | undefined, validUntil?: string | undefined};

export type GetApiApiV1ContextIdInspectOptions = {baseUrl: string, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const memoryCategory = z.enum(["identity", "knowledge", "context"]);

export const sourceRefJson = z.object({kind: z.string(), ref: z.string().nullable().optional(), sessionId: z.string().nullable().optional()});

export const attributeDetailJson = z.object({createdAt: z.string(), entity: z.string(), id: z.string(), importance: z.number(), key: z.string(), memoryCategory: memoryCategory, source: sourceRefJson.nullable().optional(), supersededBy: z.string().nullable().optional(), supersedes: z.string().nullable().optional(), validFrom: z.string().nullable().optional(), validUntil: z.string().nullable().optional(), value: z.string()});

export const entityDetailJson = z.object({createdAt: z.string(), entityType: z.string(), id: z.string(), importance: z.number(), memoryCategory: memoryCategory, name: z.string(), updatedAt: z.string()});

export const relationDetailJson = z.object({createdAt: z.string(), id: z.string(), label: z.string(), memoryCategory: memoryCategory, object: z.string(), source: sourceRefJson.nullable().optional(), subject: z.string(), validFrom: z.string().nullable().optional(), validUntil: z.string().nullable().optional()});

export const responseTraceSummaryJson = z.object({cached: z.boolean(), createdAt: z.string(), id: z.string(), latencyMs: z.number().int(), responseText: z.string(), reusedFrom: z.string().nullable().optional(), sessionId: z.string().nullable().optional(), source: z.string(), userMessage: z.string()});

export const returnedRefJson = z.object({id: z.string(), label: z.string().nullable().optional(), rank: z.number().int().nullable().optional(), ref: z.string().nullable().optional(), score: z.number().nullable().optional(), table: z.string()});

export const retrievalTraceSummaryJson = z.object({createdAt: z.string(), id: z.string(), latencyMs: z.number().int(), mode: z.string(), retrievedIds: z.array(z.string()), returned: z.array(returnedRefJson), scores: z.array(z.number()), tierEntered: z.number().int(), tierReason: z.string()});

export const traceRecordJson = z.object({cached: z.boolean(), createdAt: z.string(), id: z.string(), latencyMs: z.number().int(), parent: responseTraceSummaryJson.nullable().optional(), queryText: z.string(), resolutionTier: z.string(), retrievals: z.array(retrievalTraceSummaryJson).nullable().optional(), tierReason: z.string()});

export const inspectResponseJson = z.union([z.object({attributes: z.array(attributeDetailJson), entity: entityDetailJson, kind: z.literal("entity"), relations: z.array(relationDetailJson)}), z.object({current: attributeDetailJson.nullable().optional(), history: z.array(attributeDetailJson), kind: z.literal("attribute")}), z.object({kind: z.literal("relation"), matches: z.array(relationDetailJson)}), z.object({kind: z.literal("trace"), trace: traceRecordJson})]);

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Resolve an inspect ref (entity, attribute, relation, passage, or trace) to a normalised view. Ref grammar: `entity:<type>/<name>`, `attribute:<type>/<name>/<key>`, `relation:<src_type>/<src_name>-[<label>]-><dst_type>/<dst_name>`, `passage:<document_id>/<index>`, `trace:<id>`.
 * 
 * GET /api/v1/{context_id}/inspect
 */
export const getApiApiV1ContextIdInspect = async (args: GetApiApiV1ContextIdInspectArgs, options: GetApiApiV1ContextIdInspectOptions) => {
const {baseUrl, fetch: fetchFn = fetch, apiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.ref != null) query.append("ref", String(args.ref))
if (args.asOf != null) query.append("asOf", String(args.asOf))
if (args.atInstant != null) query.append("atInstant", String(args.atInstant))
if (args.validFrom != null) query.append("validFrom", String(args.validFrom))
if (args.validUntil != null) query.append("validUntil", String(args.validUntil))
if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/${encodeURIComponent(String(args.context_id))}/inspect${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(inspectResponseJson, await res.json())
};