--!strict
local process = require("@lune/process")
local fs = require("@lune/fs")
local net = require("@lune/net")
local serde = require("@lune/serde")

print("-- 🟧 Starting pull of latest release...")

type wally_manifest = {
	package: {
		name: string,
		version: string,
		registry: string,
		realm: string,
		license: string?,
		exclude: { string }?,
		include: { string }?,
	},
	dependencies: {
		[string]: string,
	},
}

type environment = "luau" | "lune" | "roblox" | "roblox_server"
type pesde_dependency = {
	name: string,
	version: string,
	index: string?,
	target: environment?,
} | {
	wally: string,
	version: string,
	index: string?,
} | {
	repo: string,
	rev: string,
	path: string?,
}

type pesde_manifest = {
	name: string,
	version: string,
	description: string?,
	license: string?,
	authors: { string }?,
	repository: string?,
	private: boolean?,
	includes: { string }?,
	pesde_version: string?,
	workspace_members: { string }?,

	target: {
		environment: environment,
		lib: string,
		bin: string?,
		build_files: { string }?,
	},

	scripts: {
		roblox_sync_config_generator: string?,
		sourcemap_generator: string?,

		[string]: string,
	}?,

	indices: {
		default: string,

		[string]: string,
	},
	wally_indices: {
		default: string,

		[string]: string,
	}?,

	overrides: {
		[string]: pesde_dependency,
	}?,
	patches: {
		[string]: { [string]: string },
	}?,

	dependencies: {
		[string]: pesde_dependency,
	}?,
	peer_dependencies: {
		[string]: pesde_dependency,
	}?,
	dev_dependencies: {
		[string]: pesde_dependency,
	}?,
}

print("🟧 Fetching github token...")
local github_token: string = process.args[1]

if not github_token then
	local env_exists = fs.metadata(".env").exists
	if not env_exists then
		error("Usage: lune run download-jecs [GITHUB_PAT]\nAlternatively, put the PAT in an .env file under GITHUB_PAT")
	end

	local env = serde.decode("toml", fs.readFile(".env"))
	local pat = env.GITHUB_PAT or error("❌ Couldn't read GITHUB_PAT from .env")
	github_token = pat
end
print("✅ Got github token.")

--local manifest_contents = fs.readFile("wally.toml") or error("Couldn't read manifest.")
print("🟧 Fetching latest jecs wally manifest...")
local pull_manifest_res = net.request("https://raw.githubusercontent.com/Ukendio/jecs/refs/heads/main/wally.toml")
if not pull_manifest_res.ok then
	error(`❌ Couldn't download jecs manifest: {pull_manifest_res.statusCode} {pull_manifest_res.statusMessage}`)
end
local manifest_contents = pull_manifest_res.body
local manifest: wally_manifest = serde.decode("toml", manifest_contents) or error("Couldn't decode manifest.")
local jecs_version = manifest.package.version
print(`✅ Got latest manifest. Version: {jecs_version}`)

type gh_api_tag = {
	ref: string,
	node_id: string,
	url: string,
	object: {
		sha: string,
		type: string,
		url: string,
	},
}

print("🟧 Getting tag associated with version in manifest...")
local response = net.request({
	url = `https://api.github.com/repos/ukendio/jecs/git/refs/tags/v{jecs_version}`,
	method = "GET",
	headers = {
		Accept = "application/vnd.github+json",
		Authorization = `Bearer {github_token}`,
		["X-GitHub-Api-Version"] = "2022-11-28",
	},
})

if not response.ok then
	error(`❌ Github api response not ok:\n{response.statusCode} @ {response.statusMessage}\n{response.body}`)
end

local gh_api_tag: gh_api_tag = serde.decode("json", response.body)
print(`✅ Got associated tag: {gh_api_tag.object.sha}`)

local URL = `https://raw.githubusercontent.com/Ukendio/jecs/{gh_api_tag.object.sha}/`
local function download(path: string, output: string)
	process.spawn("curl", { URL .. path, "-o", output })
end

local function download_list(list: { { path: string, output: string } })
	local n = #list
	print(`🟧 Downloading {n} files...`)

	for idx = 1, n do
		local file = list[idx]

		print(`Downloading file {idx}/{n} - {file.path} -> {file.output}...`)
		download(file.path, file.output)
	end

	print(`✅ Downloaded {n} files.`)
end

download_list({
	{ path = "src/init.luau", output = "init.luau" },
	{ path = ".luaurc", output = ".luaurc" },
	{ path = "LICENSE", output = "LICENSE" },
	{ path = "README.md", output = "README.md" },
})

print(`🟧 Modifying README.md to include repo info...`)
local readme_contents = fs.readFile("README.md")
local new_readme_contents = [[
An automatically synced minimal copy of the [jecs](https://github.com/Ukendio/jecs) repo published to pesde.


]] .. readme_contents
fs.writeFile("README.md", new_readme_contents)
print(`✅ Modified README.md.`)

local pesde_manifest: pesde_manifest = {
	name = "mark_marks/jecs_pesde",
	description = "A minimal copy of jecs published on the official pesde registry",
	version = jecs_version,
	authors = { "jecs authors" },
	repository = "https://git.devmarked.win/marked/jecs-pesde",
	license = manifest.package.license,
	includes = {
		"init.luau",
		"pesde.toml",
		"README.md",
		"LICENSE",
		".luaurc",
	},

	target = {
		environment = "luau",
		lib = "init.luau",
	},

	indices = {
		default = "https://github.com/daimond113/pesde-index",
	},
}

print("🟧 Writing pesde manifest...")
local serialized_manifest = serde.encode("toml", pesde_manifest, true)
fs.writeFile("pesde.toml", serialized_manifest)
print("✅ Wrote pesde manifest.")

print("-- ✅ Finished pulling latest release.")