import {z} from 'zod'

export type Rule = {field: string, op: string, value: unknown, unknown?: ('exclude' | 'review' | null) | undefined};

export type PreferredRule = {field: string, op: string, value: unknown, weight: number};

export type Cutoffs = {pursue: number, monitor: number};

export type DiscoveryDraft = {markets: Array<string>, must?: Array<Rule> | undefined, preferred?: Array<PreferredRule> | undefined, verdict_cutoffs: Cutoffs};

export type DiscoveryQueryRequest = {buy_box: string, draft?: (DiscoveryDraft | null) | undefined, limit?: number | undefined, cursor?: (string | null) | undefined};

export type CreateApiV2DiscoveryQueryArgs = {authorization?: (string | null) | undefined, 'X-Tenant'?: (string | null) | undefined, body: DiscoveryQueryRequest};

export type CreateApiV2DiscoveryQueryOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const rule = z.object({field: z.string().min(1).max(100), op: z.string().min(1).max(20), value: z.unknown(), unknown: z.enum(["exclude", "review"]).nullable().optional()});

export const preferredRule = z.object({field: z.string().min(1).max(100), op: z.string().min(1).max(20), value: z.unknown(), weight: z.number()});

export const cutoffs = z.object({pursue: z.number(), monitor: z.number()});

export const discoveryDraft = z.object({markets: z.array(z.string().min(1).max(100)), must: z.array(rule).optional(), preferred: z.array(preferredRule).optional(), verdict_cutoffs: cutoffs});

export const mustEvidence = z.object({field: z.string(), value: z.unknown(), status: z.enum(["pass", "fail", "unknown"])});

export const preferredEvidence = z.object({field: z.string(), value: z.unknown(), weight: z.number(), contribution: z.number()});

export const scoreBreakdown = z.object({must: z.array(mustEvidence), preferred: z.array(preferredEvidence)});

export const discoveryResult = z.object({parcel_key: z.string(), apn: z.string().nullable(), address: z.string().nullable(), lat: z.number().nullable(), lon: z.number().nullable(), acres: z.number().nullable(), developable_acres: z.number().nullable(), geometry: z.record(z.string(), z.unknown()).nullable(), bbox: z.array(z.number()).nullable(), facts: z.record(z.string(), z.unknown()), provenance: z.record(z.string(), z.unknown()), score: z.number(), verdict: z.enum(["PURSUE", "MONITOR", "HOLD"]), review_required: z.boolean(), unknowns: z.array(z.string()), score_breakdown: scoreBreakdown});

export const discoveryQueryResponse = z.object({market: z.string(), market_id: z.string(), vintage_id: z.string(), query_hash: z.string(), applied_spec: discoveryDraft, denominator: z.number().int(), preference_weight_total: z.number(), eligible_total: z.number().int(), results: z.array(discoveryResult), next_cursor: z.string().nullable()});

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
};

/**
 * Discovery Query
 * 
 * POST /v2/discovery/query
 */
export const createApiV2DiscoveryQuery = async (args: CreateApiV2DiscoveryQueryArgs, options: CreateApiV2DiscoveryQueryOptions) => {
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")

if (args.authorization != null) headers.set("authorization", String(args.authorization))
if (args['X-Tenant'] != null) headers.set("X-Tenant", String(args['X-Tenant']))

const url = `${baseUrl.replace(/\/+$/, '')}/v2/discovery/query${query.size > 0 ? `?${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(discoveryQueryResponse, await res.json())
};