# Build the ESP32-S3 firmware from PowerShell without executing .env as code.
[CmdletBinding()]
param(
    [string]$EnvFile = '.env',
    [Parameter(ValueFromRemainingArguments = $true)]
    [string[]]$CargoArgs = @()
)

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest
Push-Location (Split-Path -Parent $PSScriptRoot)
$buildEnvironment = @{}
foreach ($name in @('CARGO_WORKSPACE_DIR', 'ESP_IDF_GLOB_BASE', 'ESP_IDF_GLOB_PARTITIONS')) {
    $buildEnvironment[$name] = [Environment]::GetEnvironmentVariable($name, 'Process')
}
try {
    if (Test-Path -LiteralPath $EnvFile) {
        $lineNumber = 0
        foreach ($line in Get-Content -LiteralPath $EnvFile -Encoding UTF8) {
            $lineNumber++
            if ($line -match '^\s*(#|$)') { continue }
            if ($line -notmatch '^\s*(?:export\s+)?([A-Za-z_][A-Za-z0-9_]*)\s*=(.*)$') {
                throw "Invalid assignment in ${EnvFile}:${lineNumber}"
            }
            $key = $Matches[1]
            $value = $Matches[2].Trim()
            if ($value.StartsWith("'") -or $value.StartsWith('"')) {
                $quote = $value.Substring(0, 1)
                if ($value.Length -lt 2 -or -not $value.EndsWith($quote)) {
                    throw "Unclosed quote in ${EnvFile}:${lineNumber}"
                }
                $value = $value.Substring(1, $value.Length - 2)
            } else {
                $value = ($value -replace '\s+#.*$', '').TrimEnd()
            }
            [Environment]::SetEnvironmentVariable($key, $value, 'Process')
        }
    }

    if ([string]::IsNullOrWhiteSpace($env:WIFI_SSID) -or $env:WIFI_SSID -eq 'your-ssid') {
        throw 'Set WIFI_SSID in .env (copy .env.example) or the environment before building.'
    }
    if ($null -eq $env:WIFI_PASS) { $env:WIFI_PASS = '' }

    $env:CARGO_WORKSPACE_DIR = (Get-Location).Path
    $env:ESP_IDF_GLOB_BASE = (Get-Location).Path
    $env:ESP_IDF_GLOB_PARTITIONS = 'partitions.csv'

    & cargo build --release --locked @CargoArgs
    if ($LASTEXITCODE -ne 0) { throw "cargo build failed (exit $LASTEXITCODE)." }
} finally {
    foreach ($name in $buildEnvironment.Keys) {
        [Environment]::SetEnvironmentVariable($name, $buildEnvironment[$name], 'Process')
    }
    Pop-Location
}