param([switch]$DatabaseOnly, [int]$DatabasePort = 55432, [int]$Port = 3000,
      [string]$PostgresBin = 'C:\Program Files\PostgreSQL\17\bin')
$ErrorActionPreference = 'Stop'
$repo = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '..'))
$portableBin = Join-Path $repo 'target/postgresql/pgsql/bin'
if (!$PSBoundParameters.ContainsKey('PostgresBin') -and (Test-Path (Join-Path $portableBin 'postgres.exe'))) { $PostgresBin = $portableBin }
if (!(Test-Path (Join-Path $PostgresBin '../share/postgres.bki'))) { throw 'A complete PostgreSQL server distribution is required. Pass -PostgresBin PATH; client-only installations lack share/postgres.bki.' }
$localDir = Join-Path $repo 'target/local'
$dataDir = Join-Path $localDir 'postgres'
New-Item -ItemType Directory -Force $localDir | Out-Null
if (!(Test-Path (Join-Path $dataDir 'PG_VERSION'))) {
    & (Join-Path $PostgresBin 'initdb.exe') -D $dataDir -U meguri --auth=trust --encoding=UTF8 --locale=C
    if ($LASTEXITCODE) { throw 'initdb failed' }
}
& (Join-Path $PostgresBin 'pg_ctl.exe') -D $dataDir status *> $null
if ($LASTEXITCODE) {
    $pgArgs = @('-D',('"'+$dataDir+'"'),'-l',('"'+(Join-Path $localDir 'postgres.log')+'"'),'-o',('"-h 127.0.0.1 -p '+$DatabasePort+'"'),'-w','start')
    $pgStart = Start-Process -FilePath (Join-Path $PostgresBin 'pg_ctl.exe') -ArgumentList $pgArgs -WindowStyle Hidden -PassThru
    $pgStart.WaitForExit()
    if ($pgStart.ExitCode) { throw 'PostgreSQL did not start; inspect target/local/postgres.log' }
}
foreach ($dbName in @('meguri','meguri_workspace_test')) {
    $exists = & (Join-Path $PostgresBin 'psql.exe') -h 127.0.0.1 -p $DatabasePort -U meguri -d postgres -Atc "SELECT 1 FROM pg_database WHERE datname='$dbName'"
    if ($exists -ne '1') {
        & (Join-Path $PostgresBin 'createdb.exe') -h 127.0.0.1 -p $DatabasePort -U meguri $dbName
        if ($LASTEXITCODE) { throw 'Could not create development database' }
    }
}
@{ postgresBin=$PostgresBin; databasePort=$DatabasePort; port=$Port } | ConvertTo-Json | Set-Content (Join-Path $localDir 'settings.json')
$env:DATABASE_URL = "postgresql://meguri@127.0.0.1:$DatabasePort/meguri"
$env:MEGURI_TEST_DATABASE_URL = "postgresql://meguri@127.0.0.1:$DatabasePort/meguri_workspace_test"
if ($DatabaseOnly) { Write-Output "Database ready. Test URL: $env:MEGURI_TEST_DATABASE_URL"; return }
$pidFile = Join-Path $localDir 'app.pid'
$appExecutable = Join-Path $localDir 'meguri-dev.exe'
if (Test-Path $pidFile) {
    $old = Get-Process -Id ([int](Get-Content $pidFile)) -ErrorAction SilentlyContinue
    if ($old -and $old.Path -eq $appExecutable) { throw 'Meguri is already running. Run scripts/stop-dev.ps1 first.' }
}
Push-Location $repo
try { cargo build --locked; if ($LASTEXITCODE) { throw 'Build failed' } } finally { Pop-Location }
$env:MEGURI_BIND = "127.0.0.1:$Port"
$env:MEGURI_PUBLIC_URL = "http://127.0.0.1:$Port"
$env:MEGURI_ALLOW_SIGNUP = 'true'
$env:MEGURI_SEED_DEMO = 'true'
$env:MEGURI_ROLE = 'all'
Copy-Item -LiteralPath (Join-Path $repo 'target/debug/meguri.exe') -Destination $appExecutable
$app = Start-Process -FilePath $appExecutable -WorkingDirectory $repo -WindowStyle Hidden -PassThru -RedirectStandardOutput (Join-Path $localDir 'app.log') -RedirectStandardError (Join-Path $localDir 'app-error.log')
$app.Id | Set-Content $pidFile
Write-Output "Meguri starting at $env:MEGURI_PUBLIC_URL — demo: alice / meguri-demo-only"