<#
.SYNOPSIS
	start-ipfs-server.ps1
.DESCRIPTION
	Starts a local IPFS server as a daemon process
.EXAMPLE
	PS> .\start-ipfs-server.ps1
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz / License: CC0
#>

try {
	"⚠️ Make sure your router does not block port 4001 (TCP/UDP) for IPv4/v6!"
	""

	"Step 1/5: searching for ipfs executable..."
	$Result = (ipfs --version)
	if ($lastExitCode -ne "0") { throw "Can't execute 'ipfs' - make sure IPFS is installed and available" }

	"Step 2/5: initializing..."
	& ipfs init --profile server

	"Step 3/5: configuring..."
	& ipfs config Addresses.API /ip4/0.0.0.0/tcp/5001
	if ($lastExitCode -ne "0") { throw "'ipfs config Addresses.API' failed" }

	& ipfs config Addresses.Gateway /ip4/0.0.0.0/tcp/8765
	if ($lastExitCode -ne "0") { throw "'ipfs config Addresses.Gateway' failed" }

	$Hostname = $(hostname)
	& ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '[\"http://raspi:5001\", \"http://localhost:3000\", \"http://127.0.0.1:5001\", \"https://webui.ipfs.io\"]'
	if ($lastExitCode -ne "0") { throw "'ipfs config Access-Control-Allow-Origin' failed" }

	& ipfs config --json API.HTTPHeaders.Access-Control-Allow-Methods '[\"PUT\", \"POST\"]'
	if ($lastExitCode -ne "0") { throw "'ipfs config Access-Control-Allow-Methods' failed" }

	"Step 4/5: increasing UDP receive buffer size..."

	& sudo sysctl -w net.core.rmem_max=2500000
	if ($lastExitCode -ne "0") { throw "'sysctl' failed" }

	"Step 5/5: starting daemon..."

#	Start-Process nohup 'ipfs daemon'
	Start-Process nohup -ArgumentList 'ipfs','daemon' -RedirectStandardOutput "$HOME/console.out" -RedirectStandardError "$HOME/console.err"

	"Done."
	exit 0
} catch {
	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}