import { getPreferenceValues, showToast, Toast } from "@raycast/api"

export interface Project {
	id: string
	name: string
	containerTag: string
	description?: string
}

export interface Memory {
	id: string
	content: string
	title?: string
	url?: string
	containerTag?: string
	createdAt: string
}

export interface SearchResult {
	documentId: string
	chunks: unknown[]
	title?: string
	metadata: Record<string, unknown>
	score?: number
	createdAt: string
	updatedAt: string
	type: string
}

export interface AddMemoryRequest {
	content: string
	containerTags?: string[]
	title?: string
	url?: string
	metadata?: Record<string, unknown>
}

interface AddProjectRequest {
	name: string
}

export interface SearchRequest {
	q: string
	containerTags?: string[]
	limit?: number
}

export interface SearchResponse {
	results: SearchResult[]
	timing: number
	total: number
}

const API_BASE_URL = "https://api.supermemory.ai"

class SupermemoryAPIError extends Error {
	constructor(
		message: string,
		public status?: number,
	) {
		super(message)
		this.name = "SupermemoryAPIError"
	}
}

class AuthenticationError extends Error {
	constructor(message: string) {
		super(message)
		this.name = "AuthenticationError"
	}
}

function getApiKey(): string {
	const { apiKey } = getPreferenceValues<Preferences>()
	return apiKey
}

async function makeAuthenticatedRequest<T>(
	endpoint: string,
	options: RequestInit = {},
): Promise<T> {
	const apiKey = getApiKey()

	const url = `${API_BASE_URL}${endpoint}`

	try {
		const response = await fetch(url, {
			...options,
			headers: {
				Authorization: `Bearer ${apiKey}`,
				"Content-Type": "application/json",
				...options.headers,
			},
		})

		if (!response.ok) {
			if (response.status === 401) {
				throw new AuthenticationError(
					"Invalid API key. Please check your API key in preferences. Get a new one from https://supermemory.link/raycast",
				)
			}

			let errorMessage = `API request failed: ${response.statusText}`
			try {
				const errorBody = (await response.json()) as { message?: string }
				if (errorBody.message) {
					errorMessage = errorBody.message
				}
			} catch {
				// Ignore JSON parsing errors, use default message
			}

			throw new SupermemoryAPIError(errorMessage, response.status)
		}

		if (!response.headers.get("content-type")?.includes("application/json")) {
			throw new SupermemoryAPIError("Invalid response format from API")
		}

		const data = (await response.json()) as T
		return data
	} catch (err) {
		if (
			err instanceof AuthenticationError ||
			err instanceof SupermemoryAPIError
		) {
			throw err
		}

		// Handle network errors or other fetch errors
		throw new SupermemoryAPIError(
			`Network error: ${err instanceof Error ? err.message : "Unknown error"}`,
		)
	}
}

export async function fetchProjects(): Promise<Project[]> {
	try {
		const response = await makeAuthenticatedRequest<{ projects: Project[] }>(
			"/v3/projects",
		)
		return response.projects || []
	} catch (error) {
		await showToast({
			style: Toast.Style.Failure,
			title: "Failed to fetch projects",
			message:
				error instanceof Error ? error.message : "Unknown error occurred",
		})
		throw error
	}
}

export async function addProject(request: AddProjectRequest): Promise<Project> {
	const response = await makeAuthenticatedRequest<Project>("/v3/projects", {
		method: "POST",
		body: JSON.stringify(request),
	})

	await showToast({
		style: Toast.Style.Success,
		title: "Project Added",
		message: "Successfully added project to Supermemory",
	})

	return response
}

export async function addMemory(request: AddMemoryRequest): Promise<Memory> {
	try {
		const response = await makeAuthenticatedRequest<Memory>("/v3/documents", {
			method: "POST",
			body: JSON.stringify(request),
		})

		await showToast({
			style: Toast.Style.Success,
			title: "Memory Added",
			message: "Successfully added memory to Supermemory",
		})

		return response
	} catch (error) {
		await showToast({
			style: Toast.Style.Failure,
			title: "Failed to add memory",
			message:
				error instanceof Error ? error.message : "Unknown error occurred",
		})
		throw error
	}
}

export async function searchMemories(
	request: SearchRequest,
): Promise<SearchResult[]> {
	try {
		const response = await makeAuthenticatedRequest<SearchResponse>(
			"/v3/search",
			{
				method: "POST",
				body: JSON.stringify(request),
			},
		)

		return response.results || []
	} catch (error) {
		await showToast({
			style: Toast.Style.Failure,
			title: "Failed to search memories",
			message:
				error instanceof Error ? error.message : "Unknown error occurred",
		})
		throw error
	}
}

// Helper function to check if API key is configured and valid
export async function fetchSettings(): Promise<object> {
	const response = await makeAuthenticatedRequest<object>("/v3/settings")
	return response
}