import { createServer } from 'node:http'

const host = '127.0.0.1'
const port = Number(process.env.CURSEFORGE_MOCK_PORT ?? 18081)
const projectId = 100001
const fileId = 200001
const fileBody = Buffer.from('Axolotl CurseForge local fixture\n')
const now = '2026-07-14T00:00:00Z'

const file = {
	id: fileId,
	gameId: 432,
	modId: projectId,
	isAvailable: true,
	displayName: 'Local Fixture 1.0.0',
	fileName: 'axolotl-local-fixture-1.0.0.jar',
	releaseType: 1,
	fileStatus: 4,
	hashes: [],
	fileDate: now,
	fileLength: fileBody.length,
	downloadCount: 1,
	fileSizeOnDisk: fileBody.length,
	downloadUrl: `http://${host}:${port}/files/axolotl-local-fixture-1.0.0.jar`,
	gameVersions: ['1.21.1', 'Fabric'],
	sortableGameVersions: [],
	dependencies: [],
	exposeAsAlternative: false,
	parentProjectFileId: null,
	alternateFileId: null,
	isServerPack: false,
	serverPackFileId: null,
	isEarlyAccessContent: false,
	earlyAccessEndDate: null,
	fileFingerprint: 123456789,
	modules: [],
}

const project = {
	id: projectId,
	gameId: 432,
	name: 'Axolotl Local Fixture',
	slug: 'axolotl-local-fixture',
	links: {
		websiteUrl: 'https://www.curseforge.com/minecraft/mc-mods',
		wikiUrl: null,
		issuesUrl: null,
		sourceUrl: null,
	},
	summary: 'A local CurseForge API fixture used to exercise search, details and installation.',
	status: 4,
	downloadCount: 42,
	isFeatured: false,
	primaryCategoryId: 6,
	categories: [
		{
			id: 6,
			gameId: 432,
			name: 'Fabric',
			slug: 'fabric',
			url: 'https://www.curseforge.com/minecraft/mc-mods/fabric',
			iconUrl: null,
			dateModified: now,
			isClass: false,
			classId: 6,
			parentCategoryId: null,
			displayIndex: 0,
		},
	],
	classId: 6,
	authors: [{ id: 1, name: 'Local Fixture', url: 'https://example.invalid/local-fixture' }],
	logo: null,
	screenshots: [],
	mainFileId: fileId,
	latestFiles: [file],
	latestFilesIndexes: [
		{
			gameVersion: '1.21.1',
			fileId,
			filename: file.fileName,
			releaseType: 1,
			gameVersionTypeId: null,
			modLoader: 4,
		},
	],
	dateCreated: now,
	dateModified: now,
	dateReleased: now,
	allowModDistribution: true,
	gamePopularityRank: 1,
	isAvailable: true,
	thumbsUpCount: 1,
}

function json(response, status, value) {
	response.writeHead(status, { 'content-type': 'application/json; charset=utf-8' })
	response.end(JSON.stringify(value))
}

function api(data, pagination) {
	return pagination ? { data, pagination } : { data }
}

const server = createServer((request, response) => {
	const url = new URL(request.url ?? '/', `http://${host}:${port}`)
	const path = url.pathname
	process.stdout.write(`${request.method} ${url.pathname}${url.search}\n`)

	if (path === '/files/axolotl-local-fixture-1.0.0.jar') {
		response.writeHead(200, {
			'content-type': 'application/java-archive',
			'content-length': fileBody.length,
		})
		response.end(fileBody)
		return
	}

	if (path === '/v1/games') return json(response, 200, api([]))
	if (path === '/v1/categories') return json(response, 200, api(project.categories))
	if (path === '/v1/mods/search') {
		return json(
			response,
			200,
			api([project], { index: 0, pageSize: 20, resultCount: 1, totalCount: 1 }),
		)
	}
	if (path === '/v1/mods' && request.method === 'POST') {
		return json(response, 200, api([project]))
	}
	if (path === `/v1/mods/${projectId}`) return json(response, 200, api(project))
	if (path === `/v1/mods/${projectId}/description`) {
		return json(
			response,
			200,
			api('<h2>Local fixture</h2><p>This response comes from tools/curseforge-mock.mjs.</p>'),
		)
	}
	if (path === `/v1/mods/${projectId}/files`) {
		return json(
			response,
			200,
			api([file], { index: 0, pageSize: 50, resultCount: 1, totalCount: 1 }),
		)
	}
	if (path === `/v1/mods/${projectId}/files/${fileId}`) {
		return json(response, 200, api(file))
	}
	if (path === `/v1/mods/${projectId}/files/${fileId}/download-url`) {
		return json(response, 200, api(file.downloadUrl))
	}
	if (path === `/v1/mods/${projectId}/files/${fileId}/changelog`) {
		return json(response, 200, api('<p>Initial local fixture release.</p>'))
	}
	if (path === '/v1/mods/files' && request.method === 'POST') {
		return json(response, 200, api([file]))
	}
	if (path === '/v1/fingerprints/432' && request.method === 'POST') {
		return json(
			response,
			200,
			api({
				isCacheBuilt: true,
				exactMatches: [],
				exactFingerprints: [],
				partialMatches: [],
				partialMatchFingerprints: {},
				installedFingerprints: [],
				unmatchedFingerprints: [],
			}),
		)
	}

	json(response, 404, { message: `No local fixture route for ${request.method} ${path}` })
})

server.listen(port, host, () => {
	process.stdout.write(`CurseForge fixture listening on http://${host}:${port}\n`)
})