[CmdletBinding()]
param(
    [string]$RtcAppId = "6a8f92ca43726c017d34cce1",
    [switch]$EnableArkSummary,
    [string]$ArkContentModel = "",
    [switch]$Force
)

$ErrorActionPreference = "Stop"
$scriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path
$runtimeDirectory = Join-Path $scriptDirectory "runtime"
$utf8NoBom = [System.Text.UTF8Encoding]::new($false)

function Read-RequiredText {
    param([string]$Prompt, [string]$Default = "")
    $suffix = if ($Default) { " [$Default]" } else { "" }
    $value = Read-Host "$Prompt$suffix"
    if ([string]::IsNullOrWhiteSpace($value)) { $value = $Default }
    if ([string]::IsNullOrWhiteSpace($value)) { throw "$Prompt 不能为空" }
    return $value.Trim()
}

function Read-RequiredSecret {
    param([string]$Prompt, [int]$MinimumLength = 1)
    $secureValue = Read-Host $Prompt -AsSecureString
    $pointer = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($secureValue)
    try {
        $value = [Runtime.InteropServices.Marshal]::PtrToStringBSTR($pointer)
    }
    finally {
        [Runtime.InteropServices.Marshal]::ZeroFreeBSTR($pointer)
    }
    if ($value.Length -lt $MinimumLength) { throw "$Prompt 长度不足" }
    return $value
}

function Write-SecretFile {
    param([string]$Name, [string]$Value)
    $target = Join-Path $runtimeDirectory $Name
    [IO.File]::WriteAllText($target, $Value, $utf8NoBom)
}

if ($RtcAppId.Length -ne 24) {
    throw "RTC AppId 必须正好为 24 个字符"
}

if ((Test-Path -LiteralPath $runtimeDirectory) -and -not $Force) {
    throw "本地凭据目录已经存在。确认需要重新配置后使用 -Force。"
}

New-Item -ItemType Directory -Path $runtimeDirectory -Force | Out-Null

Write-Host "`n配置只保存在本机 deploy/local-rtc/runtime，已被 Git 忽略。" -ForegroundColor Cyan
Write-Host "输入密钥时屏幕不会显示字符。`n" -ForegroundColor DarkGray

$rtcAppKey = Read-RequiredSecret "RTC AppKey" 16
$volcAccessKeyId = Read-RequiredText "火山引擎 AccessKey ID"
$volcSecretAccessKey = Read-RequiredSecret "火山引擎 Secret AccessKey"
$doubaoAppId = Read-RequiredText "豆包端到端语音 APP ID"
$doubaoAccessToken = Read-RequiredSecret "豆包端到端语音 Access Token"
$speaker = Read-RequiredText "豆包音色 ID" "zh_female_vv_jupiter_bigtts"
$arkApiKey = ""
if ($EnableArkSummary) {
    $arkApiKey = Read-RequiredSecret "方舟 API Key"
    $ArkContentModel = Read-RequiredText "方舟内容模型 Endpoint ID" $ArkContentModel
}

$template = [ordered]@{
    schema_version = "voice-chat-template-bundle-v1"
    templates = [ordered]@{
        s2s_hybrid = [ordered]@{
            AgentConfig = [ordered]@{
                TargetUserId = @()
                UserId = ""
                WelcomeMessage = ""
                EnableConversationStateCallback = $false
            }
            Config = [ordered]@{
                InterruptMode = 0
                S2SConfig = [ordered]@{
                    Provider = "volcano"
                    OutputMode = 0
                    ProviderParams = [ordered]@{
                        app = [ordered]@{
                            appid = $doubaoAppId
                            token = $doubaoAccessToken
                        }
                        dialog = [ordered]@{
                            extra = [ordered]@{
                                model = "O"
                                strict_audit = $true
                                audit_response = "抱歉，这个话题我暂时无法回答。我们换个轻松的话题吧。"
                            }
                        }
                        asr = [ordered]@{
                            extra = [ordered]@{
                                end_smooth_window_ms = 1200
                            }
                        }
                        tts = [ordered]@{
                            speaker = $speaker
                        }
                    }
                }
            }
        }
    }
}

Write-SecretFile "rtc-app-key" $rtcAppKey
Write-SecretFile "volc-access-key-id" $volcAccessKeyId
Write-SecretFile "volc-secret-access-key" $volcSecretAccessKey
Write-SecretFile "ark-api-key" $arkApiKey
[IO.File]::WriteAllText(
    (Join-Path $runtimeDirectory "voice-chat-template.json"),
    ($template | ConvertTo-Json -Depth 20),
    $utf8NoBom
)
[IO.File]::WriteAllText(
    (Join-Path $runtimeDirectory "local-rtc.env"),
    "RTC_APP_ID=$RtcAppId`nCONTENT_GENERATOR=$(if ($EnableArkSummary) { 'ark' } else { 'local' })`nARK_CONTENT_MODEL=$ArkContentModel`n",
    $utf8NoBom
)

Write-Host "`n本地真实 RTC 配置已生成。" -ForegroundColor Green
Write-Host "下一步运行： .\deploy\local-rtc\start.ps1" -ForegroundColor Green