<#
.SYNOPSIS
  OpenCode 一键接入配置脚本（Liangfeng Relay / ai.liangfeng.net.cn）
.DESCRIPTION
  写入或合并 %USERPROFILE%\.config\opencode\opencode.json，添加名为 liangfeng 的
  OpenAI 兼容供应商；已有配置会先备份为 opencode.json.bak。
.EXAMPLE
  .\configure-opencode.ps1 -ApiKey "sk-你的密钥"
.EXAMPLE
  .\configure-opencode.ps1 -ApiKey "sk-你的密钥" -Model "glm-5.3-flash"
#>
param(
  [Parameter(Mandatory = $true)][string]$ApiKey,
  [string]$BaseUrl = "https://ai.liangfeng.net.cn/v1",
  [string]$Model = "deepseek-v4.1-flash",
  [string]$ProviderId = "liangfeng"
)

$ErrorActionPreference = "Stop"

$configDir = Join-Path $env:USERPROFILE ".config\opencode"
$configPath = Join-Path $configDir "opencode.json"
New-Item -ItemType Directory -Force -Path $configDir | Out-Null

$models = [ordered]@{
  "deepseek-v4.1-flash" = @{ name = "DeepSeek V4.1 Flash" }
  "deepseek-v4-pro"     = @{ name = "DeepSeek V4 Pro" }
  "glm-5.3-flash"       = @{ name = "GLM-5.3 Flash" }
  "qwen3.8-flash"       = @{ name = "Qwen 3.8 Flash" }
  "gpt-5.6-terra"       = @{ name = "GPT-5.6 Terra" }
}

if (Test-Path $configPath) {
  Copy-Item $configPath "$configPath.bak" -Force
  Write-Host "[i] 已备份原配置到 $configPath.bak"
  try {
    $cfg = Get-Content $configPath -Raw -Encoding UTF8 | ConvertFrom-Json -AsHashtable
  } catch {
    Write-Host "[!] 原配置不是合法 JSON，无法自动合并。请手动编辑：$configPath"
    exit 1
  }
} else {
  $cfg = @{ '$schema' = 'https://opencode.ai/config.json' }
}

if (-not $cfg.ContainsKey('provider') -or $null -eq $cfg['provider']) { $cfg['provider'] = @{} }
$cfg['provider'][$ProviderId] = @{
  npm     = "@ai-sdk/openai-compatible"
  name    = "Liangfeng Relay"
  options = @{ baseURL = $BaseUrl; apiKey = $ApiKey }
  models  = $models
}
$cfg['model'] = "$ProviderId/$Model"

$json = $cfg | ConvertTo-Json -Depth 12
[System.IO.File]::WriteAllText($configPath, $json, [System.Text.UTF8Encoding]::new($false))

Write-Host ""
Write-Host "[OK] 配置已写入: $configPath" -ForegroundColor Green
Write-Host "     供应商: $ProviderId ($BaseUrl)"
Write-Host "     默认模型: $ProviderId/$Model"
Write-Host ""
Write-Host "下一步：启动 OpenCode，执行 /models 选择 '$ProviderId/$Model' 验证。"