param(
  [string]$HostName = "christunscripted",
  [string]$RemoteRoot = "/home/jbird/libre-study",
  [string]$RemoteBibleDataRoot = "/home/jbird/libre-bible-data/packages/json",
  [int]$Port = 9174,
  [string]$BootstrapUser = $env:LIBRESTUDY_BOOTSTRAP_USER,
  [string]$BootstrapPassword = $env:LIBRESTUDY_BOOTSTRAP_PASSWORD
)

$ErrorActionPreference = "Stop"

function ConvertTo-WslPath([string]$Path) {
  $resolved = (Resolve-Path $Path).Path.Replace("\", "/")
  return (wsl wslpath -a "$resolved").Trim()
}

function ConvertTo-BashSingleQuoted([string]$Value) {
  return "'" + $Value.Replace("'", "'\''") + "'"
}

function Assert-CleanPushedRepo([string]$Path, [string]$Name) {
  git -C $Path fetch origin main
  if ($LASTEXITCODE -ne 0) { throw "$Name fetch failed." }

  $status = git -C $Path status --porcelain
  if ($status) { throw "$Name has uncommitted changes. Commit or revert them before deploying." }

  $head = (git -C $Path rev-parse HEAD).Trim()
  $origin = (git -C $Path rev-parse origin/main).Trim()
  if ($head -ne $origin) {
    throw "$Name HEAD $head does not match origin/main $origin. Push the repo before deploying."
  }

  return $head
}

$repoRoot = Split-Path -Parent $PSScriptRoot
$dataRepo = Resolve-Path (Join-Path $repoRoot "..\libre-bible-data")
$commit = Assert-CleanPushedRepo $repoRoot "Libre Study"
$dataCommit = Assert-CleanPushedRepo $dataRepo "LibreBible data"
$repoRootWsl = ConvertTo-WslPath $repoRoot
$dataRepoWsl = ConvertTo-WslPath $dataRepo
$deployedAt = (Get-Date).ToUniversalTime().ToString("o")

Push-Location $repoRoot
try {
  $env:VITE_REMOTE_WORKSPACE = "true"
  $env:VITE_API_BASE_URL = "/study/api"
  $env:VITE_LIBREBIBLE_BASE_URL = "/study/librebible"
  npm.cmd run build:web:hosted
}
finally {
  Remove-Item Env:VITE_REMOTE_WORKSPACE -ErrorAction SilentlyContinue
  Remove-Item Env:VITE_API_BASE_URL -ErrorAction SilentlyContinue
  Remove-Item Env:VITE_LIBREBIBLE_BASE_URL -ErrorAction SilentlyContinue
  Pop-Location
}

$deployInfo = @{
  commit = $commit
  libreBibleDataCommit = $dataCommit
  deployedAt = $deployedAt
  source = "libre-study"
  sourceRemote = "origin/main"
} | ConvertTo-Json -Compress
$deployInfoPath = Join-Path $env:TEMP "libre-study-deploy-info.json"
Set-Content -Path $deployInfoPath -Value $deployInfo -NoNewline
$deployInfoPathWsl = ConvertTo-WslPath $deployInfoPath
$bootstrapUserQuoted = ConvertTo-BashSingleQuoted $BootstrapUser
$bootstrapPasswordQuoted = ConvertTo-BashSingleQuoted $BootstrapPassword

wsl ssh $HostName "mkdir -p '$RemoteRoot/app' '$RemoteRoot/server' '$RemoteRoot/state' '$RemoteBibleDataRoot'"
if ($LASTEXITCODE -ne 0) { throw "Remote directory preparation failed." }
wsl rsync -az "$deployInfoPathWsl" "${HostName}:$RemoteRoot/deploy-info.json"
if ($LASTEXITCODE -ne 0) { throw "Deploy info rsync failed." }
wsl rsync -az --delete "$repoRootWsl/dist-hosted/" "${HostName}:$RemoteRoot/app/"
if ($LASTEXITCODE -ne 0) { throw "App rsync failed." }
wsl rsync -az --delete "$repoRootWsl/server/" "${HostName}:$RemoteRoot/server/"
if ($LASTEXITCODE -ne 0) { throw "Server rsync failed." }
wsl rsync -az --delete "$dataRepoWsl/packages/json/" "${HostName}:$RemoteBibleDataRoot/"
if ($LASTEXITCODE -ne 0) { throw "LibreBible rsync failed." }

$pm2Command = @"
cd '$RemoteRoot' &&
export LIBRESTUDY_BOOTSTRAP_USER=$bootstrapUserQuoted &&
export LIBRESTUDY_BOOTSTRAP_PASSWORD=$bootstrapPasswordQuoted &&
if pm2 describe libre-study-web >/dev/null 2>&1; then
  PORT=$Port PUBLIC_DIR='$RemoteRoot/app' LIBREBIBLE_DATA_DIR='$RemoteBibleDataRoot' STATE_DIR='$RemoteRoot/state' DB_PATH='$RemoteRoot/state/libre-study-web.sqlite3' DEPLOY_INFO_PATH='$RemoteRoot/deploy-info.json' pm2 restart libre-study-web --update-env;
else
  PORT=$Port PUBLIC_DIR='$RemoteRoot/app' LIBREBIBLE_DATA_DIR='$RemoteBibleDataRoot' STATE_DIR='$RemoteRoot/state' DB_PATH='$RemoteRoot/state/libre-study-web.sqlite3' DEPLOY_INFO_PATH='$RemoteRoot/deploy-info.json' pm2 start '$RemoteRoot/server/libre-study-server.mjs' --name libre-study-web --update-env;
fi &&
pm2 save
"@

wsl ssh $HostName $pm2Command
if ($LASTEXITCODE -ne 0) { throw "PM2 start/restart failed." }
Remove-Item $deployInfoPath -Force -ErrorAction SilentlyContinue
Write-Output "Deployed Libre Study web commit $commit to ${HostName}:$RemoteRoot on port $Port."