import {z} from 'zod'

export type EdgeType = 'supports' | 'contradicts' | 'resolved_contradiction' | 'refines' | 'derives_from' | 'is_part_of' | 'extends' | 'cites' | 'related_to' | 'supersedes' | 'restates';

export type EdgeCreate = {from_id: string, to_id: string, type: EdgeType, weight: number, rationale?: string | undefined, detected_by?: string | undefined, confidence?: number | undefined};

export type CreateApiPotsPotIdEdgesArgs = {pot_id: string, body: Array<EdgeCreate>};

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

export const edgeType = z.enum(["supports", "contradicts", "resolved_contradiction", "refines", "derives_from", "is_part_of", "extends", "cites", "related_to", "supersedes", "restates"]);

export const edge = z.object({id: z.string(), pot_id: z.string(), workspace_id: z.string(), from_id: z.string(), to_id: z.string(), type: edgeType, weight: z.number().gte(0).lte(1), rationale: z.string().optional(), detected_by: z.string().optional(), companion_of: z.string().nullable().optional(), episode_id: z.string().nullable().optional(), confidence: z.number().gte(0).lte(1).optional(), judge: z.string().max(200).nullable().optional(), partial: z.boolean().nullable().optional(), shared_figures: z.number().int().gte(0).nullable().optional(), similarity: z.number().gte(0).lte(1).nullable().optional(), validation_status: z.string().optional(), decided_by: z.string().nullable().optional(), decided_at: z.string().nullable().optional(), resolution_type: z.string().nullable().optional(), resolved_by_name: z.string().nullable().optional(), resolved_by_role: z.string().nullable().optional(), resolved_by_contributor_id: z.string().nullable().optional(), resolved_at: z.string().nullable().optional(), resolution_notes: z.string().nullable().optional(), resolution_score_shifts: z.record(z.string(), z.number()).nullable().optional(), kind: z.enum(["express", "tacit", "partial", "hierarchy", "suspension", "extension", "manual"]).nullable().optional(), basis: z.string().nullable().optional(), scope_section: z.string().max(300).nullable().optional(), effective_at: z.string().nullable().optional(), resume_at: z.string().nullable().optional(), applied_at: z.string().nullable().optional(), axiom_conflict: z.array(z.string()).nullable().optional(), axiom_hold: z.enum(["conflict", "unverified"]).nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional()}).and(z.record(z.string(), z.unknown()));

export const blockedSupersessionRef = z.object({edge_id: z.string(), from_id: z.string(), to_id: z.string(), validation_status: z.string(), reason: z.string(), from_pot_score: z.number().nullable().optional(), to_pot_score: z.number().nullable().optional(), axiom_conflict: z.array(z.string()).optional()});

export const edgeListResponse = z.object({edges: z.array(edge), total: z.number().int(), pot_id: z.string(), blocked_supersedes: z.array(blockedSupersessionRef).optional()});

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
};

/**
 * Create edges between facts
 * 
 * POST /pots/{pot_id}/edges
 */
export const createApiPotsPotIdEdges = async (args: CreateApiPotsPotIdEdgesArgs, options: CreateApiPotsPotIdEdgesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/pots/${encodeURIComponent(String(args.pot_id))}/edges${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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