import {z} from 'zod'

export type RoutingStrategyWire = 'reliability' | 'balanced' | 'latency' | 'throughput' | 'cache';

export type MessageRole = 'user' | 'assistant' | 'system';

export type ImageMediaType = 'image/jpeg' | 'image/png' | 'image/gif' | 'image/webp';

export type ImageSourceParam = {media_type: ImageMediaType, data: string, type: 'base64'} | {url: string, type: 'url'};

export type PdfMediaType = 'application/pdf';

export type PlainTextMediaType = 'text/plain';

export type DocumentContentBlockParam = {text: string, type: 'text'} | {source: ImageSourceParam, type: 'image'};

export type ContentBlockSourceParamContent = Array<DocumentContentBlockParam> | string;

export type DocumentSourceParam = {media_type?: PdfMediaType | undefined, data: string, type: 'base64'} | {url: string, type: 'url'} | {media_type?: PlainTextMediaType | undefined, data: string, type: 'text'} | {content: ContentBlockSourceParamContent, type: 'content'};

export type TextBlockParamPart = {text: string, type: 'text'};

export type ToolResultContentBlockParam = {text: string, type: 'text'} | {source: ImageSourceParam, type: 'image'} | {title?: (string | null) | undefined, source?: (string | null) | undefined, content?: Array<TextBlockParamPart> | undefined, citations?: ({[key: string]: unknown} | null) | undefined, type: 'search_result'} | {source: DocumentSourceParam, title?: (string | null) | undefined, type: 'document'} | {tool_name?: (string | null) | undefined, type: 'tool_reference'} | {type: 'web_fetch_tool_result'} | {type: 'code_execution_tool_result'} | {type: 'bash_code_execution_tool_result'} | {type: 'text_editor_code_execution_tool_result'} | {type: 'tool_search_tool_result'} | {type: 'container_upload'};

export type ToolResultBlockParamContent = Array<ToolResultContentBlockParam> | string;

export type ContentBlockParam = {text: string, type: 'text'} | {source: ImageSourceParam, type: 'image'} | {source: DocumentSourceParam, title?: (string | null) | undefined, type: 'document'} | {title?: (string | null) | undefined, source?: (string | null) | undefined, content?: Array<TextBlockParamPart> | undefined, citations?: ({[key: string]: unknown} | null) | undefined, type: 'search_result'} | {thinking: string, signature?: (string | null) | undefined, type: 'thinking'} | {data: string, type: 'redacted_thinking'} | {id: string, name: string, input?: {[key: string]: unknown} | undefined, type: 'tool_use'} | {tool_use_id: string, content?: ToolResultBlockParamContent | undefined, type: 'tool_result'} | {id?: (string | null) | undefined, name?: (string | null) | undefined, input?: ({[key: string]: unknown} | null) | undefined, type: 'server_tool_use'} | {tool_use_id?: (string | null) | undefined, content?: (Array<{[key: string]: unknown}> | {[key: string]: unknown} | null) | undefined, type: 'web_search_tool_result'} | {type: 'web_fetch_tool_result'} | {type: 'code_execution_tool_result'} | {type: 'bash_code_execution_tool_result'} | {type: 'text_editor_code_execution_tool_result'} | {type: 'tool_search_tool_result'} | {type: 'container_upload'};

export type MessageParamContent = Array<ContentBlockParam> | string;

export type MessageParam = {role: MessageRole, content: MessageParamContent};

export type WebSearchToolVersion = 'web_search_20250305' | 'web_search_20260209';

export type WebSearchToolName = 'web_search';

export type ToolUnionParam = {name: string, description?: (string | null) | undefined, input_schema: {[key: string]: unknown}, strict?: (boolean | null) | undefined} | {type: WebSearchToolVersion, name: WebSearchToolName, user_location?: ({[key: string]: unknown} | null) | undefined, search_context_size?: ('low' | 'medium' | 'high' | null) | undefined, external_web_access?: (boolean | null) | undefined, max_uses?: (number | null) | undefined, allowed_domains?: (Array<string> | null) | undefined, blocked_domains?: (Array<string> | null) | undefined, allowed_callers?: (Array<string> | null) | undefined, defer_loading?: (boolean | null) | undefined, strict?: (boolean | null) | undefined} | {type: string, name?: (string | null) | undefined} | {[key: string]: unknown};

export type MessagesRequest = {model: string, max_tokens: number, messages: Array<MessageParam>, routing?: ({strategy: RoutingStrategyWire} | null) | undefined, system?: (Array<TextBlockParamPart> | string | null) | undefined, stream?: boolean | undefined, temperature?: (number | null) | undefined, top_p?: (number | null) | undefined, top_k?: (number | null) | undefined, stop_sequences?: (Array<string> | null) | undefined, metadata?: ({[key: string]: unknown} | null) | undefined, tools?: (Array<ToolUnionParam> | null) | undefined, tool_choice?: ({disable_parallel_tool_use?: (boolean | null) | undefined, type: 'auto'} | {disable_parallel_tool_use?: (boolean | null) | undefined, type: 'any'} | {name: string, disable_parallel_tool_use?: (boolean | null) | undefined, type: 'tool'} | {type: 'none'} | null) | undefined, thinking?: ({budget_tokens?: (number | null) | undefined, type: 'enabled'} | {type: 'disabled'} | {type: 'adaptive'} | null) | undefined, output_config?: ({effort?: ('low' | 'medium' | 'high' | 'xhigh' | 'max' | null) | undefined, format?: ({[key: string]: unknown} | null) | undefined} | null) | undefined};

export type CreateApiV1MessagesArgs = {'x-naga-routing-strategy'?: RoutingStrategyWire | undefined, body: MessagesRequest};

export type CreateApiV1MessagesOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const messagesCaller = z.object({type: z.string()});

export const messagesWebSearchInput = z.object({query: z.string().nullable().optional()});

export const messagesWebSearchResult = z.object({type: z.string(), url: z.string(), title: z.string().nullable(), encrypted_content: z.string().nullable(), page_age: z.string().nullable()});

export const messagesImageSource = z.union([z.object({media_type: z.string(), data: z.string(), type: z.literal("base64")}), z.object({url: z.string(), type: z.literal("url")})]);

export const messagesSearchResultText = z.object({type: z.string(), text: z.string()});

export const messagesContentBlock = z.union([z.object({thinking: z.string(), signature: z.string(), type: z.literal("thinking")}), z.object({data: z.string(), type: z.literal("redacted_thinking")}), z.object({text: z.string(), citations: z.unknown(), type: z.literal("text")}), z.object({id: z.string(), name: z.string(), input: z.unknown(), caller: messagesCaller, type: z.literal("tool_use")}), z.object({id: z.string(), name: z.string(), input: messagesWebSearchInput, caller: messagesCaller, type: z.literal("server_tool_use")}), z.object({tool_use_id: z.string(), content: z.array(messagesWebSearchResult), caller: messagesCaller, type: z.literal("web_search_tool_result")}), z.object({source: messagesImageSource, type: z.literal("image")}), z.object({source: z.string(), title: z.string(), content: z.array(messagesSearchResultText), citations: z.unknown(), type: z.literal("search_result")})]);

export const messagesUsage = z.object({input_tokens: z.number().int(), output_tokens: z.number().int(), cache_creation: z.unknown(), cache_creation_input_tokens: z.number().int().nullable(), cache_read_input_tokens: z.number().int().nullable(), server_tool_use: z.object({web_search_requests: z.number().int(), web_fetch_requests: z.number().int()}).nullable(), service_tier: z.unknown(), inference_geo: z.unknown(), output_tokens_details: z.unknown()});

export const messagesMessage = z.object({id: z.string(), type: z.string(), role: z.string(), content: z.array(messagesContentBlock), model: z.string(), stop_reason: z.string().nullable(), stop_sequence: z.unknown(), stop_details: z.unknown(), container: z.unknown(), usage: messagesUsage});

export const anthropicMessageResponseType = z.literal("message");

export const anthropicMessageResponseRole = z.literal("assistant");

export const anthropicImageSourceResponseType = z.literal("url");

export const anthropicImageSourceResponse = z.object({type: anthropicImageSourceResponseType, url: z.string()});

export const anthropicTextBlockResponsePart = z.object({text: z.string(), type: z.literal("text")});

export const anthropicToolUseBlockResponseInput = z.union([z.object({}), z.string()]);

export const anthropicContentBlockResponse = z.union([z.object({text: z.string(), type: z.literal("text")}), z.object({thinking: z.string(), signature: z.string().nullable().optional(), type: z.literal("thinking")}), z.object({source: anthropicImageSourceResponse, type: z.literal("image")}), z.object({title: z.string().nullable().optional(), source: z.string().nullable().optional(), content: z.array(anthropicTextBlockResponsePart).optional(), type: z.literal("search_result")}), z.object({id: z.string().nullable().optional(), name: z.string().nullable().optional(), input: anthropicToolUseBlockResponseInput.optional(), type: z.literal("tool_use")})]);

export const anthropicMessageResponse = z.object({id: z.string(), type: anthropicMessageResponseType.optional(), role: anthropicMessageResponseRole.optional(), model: z.string(), content: z.array(anthropicContentBlockResponse), stop_reason: z.string().nullable().optional(), stop_sequence: z.string().nullable(), usage: z.object({input_tokens: z.number().int(), output_tokens: z.number().int(), cache_read_input_tokens: z.number().int().nullable().optional()}).nullable().optional(), created: z.number().int()});

export const createApiV1MessagesResponse = z.union([messagesMessage, anthropicMessageResponse]);

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 a message
 * 
 * POST /v1/messages
 * 
 * Also accepts auth: xApiKeyAuth
 */
export const createApiV1Messages = async (args: CreateApiV1MessagesArgs, options?: CreateApiV1MessagesOptions) => {
const {baseUrl = "https://api.naga.ac", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args['x-naga-routing-strategy'] != null) headers.set("x-naga-routing-strategy", String(args['x-naga-routing-strategy']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/messages${query.size > 0 ? `?${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(createApiV1MessagesResponse, await res.json())
};