# Claude Code Configuration Script for XCodeCLI (Windows)
# This script configures Claude Code to use your XCodeCLI instance
# Run with: powershell -ExecutionPolicy Bypass -File setup-claude-code.ps1 -ApiKey YOUR_KEY
# Or via one-liner: & { $key='YOUR_KEY'; iwr -useb https://api.xcodecli.com/setup-claude-code.ps1 | iex }

param(
    [string]$ApiKey,
    [switch]$Test,
    [switch]$Show,
    [switch]$Help
)

# Check for pre-set variables from one-liner command (use different names to avoid conflict)
if (-not $ApiKey -and (Test-Path Variable:key)) { $ApiKey = $key }

# Configuration
$DefaultBaseUrl = "https://api2.xcodecli.com"
$ClaudeConfigDir = "$env:USERPROFILE\.claude"
$ClaudeSettingsFile = "$ClaudeConfigDir\settings.json"

# Function to write environment variable (User level)
function Set-EnvVariable {
    param(
        [string]$Name,
        [string]$Value
    )
    # Set for current session
    [Environment]::SetEnvironmentVariable($Name, $Value, [System.EnvironmentVariableTarget]::Process)
    # Set permanently for user
    [Environment]::SetEnvironmentVariable($Name, $Value, [System.EnvironmentVariableTarget]::User)
    Write-Info "Environment variable set: $Name"
}

# Color functions for output
function Write-Info {
    param([string]$Message)
    Write-Host "[INFO]" -ForegroundColor Blue -NoNewline
    Write-Host " $Message"
}

function Write-Success {
    param([string]$Message)
    Write-Host "[SUCCESS]" -ForegroundColor Green -NoNewline
    Write-Host " $Message"
}

function Write-Warning {
    param([string]$Message)
    Write-Host "[WARNING]" -ForegroundColor Yellow -NoNewline
    Write-Host " $Message"
}

function Write-Error {
    param([string]$Message)
    Write-Host "[ERROR]" -ForegroundColor Red -NoNewline
    Write-Host " $Message"
}

# Function to show help
function Show-Help {
    Write-Host @"
Claude Code Configuration Script for XCodeCLI (Windows)

Usage: powershell -ExecutionPolicy Bypass -File setup-claude-code.ps1 [OPTIONS]

This script automatically tests multiple API endpoints and selects the working one:
  - https://api2.xcodecli.com
  - https://api.xcodecli.com

Options:
  -ApiKey <KEY>  Set the API key
  -Test          Test API connections only (requires -ApiKey)
  -Show          Show current settings and exit
  -Help          Show this help message

Examples:
  .\setup-claude-code.ps1 -ApiKey your-api-key-here
  .\setup-claude-code.ps1 -Test -ApiKey your-api-key-here
  .\setup-claude-code.ps1 -Show

Interactive mode (no arguments):
  .\setup-claude-code.ps1

PowerShell Execution Policy:
  If you get an execution policy error, run:
  powershell -ExecutionPolicy Bypass -File setup-claude-code.ps1
"@
    exit 0
}

# Function to backup existing settings
function Backup-Settings {
    if (Test-Path $ClaudeSettingsFile) {
        $timestamp = Get-Date -Format "yyyyMMdd_HHmmss"
        $backupFile = "$ClaudeSettingsFile.backup.$timestamp"
        Copy-Item -Path $ClaudeSettingsFile -Destination $backupFile
        Write-Info "Backed up existing settings to: $backupFile"
    }
    $configJsonPath = "$ClaudeConfigDir\config.json"
    if (Test-Path $configJsonPath) {
        $timestamp = Get-Date -Format "yyyyMMdd_HHmmss"
        $backupFile = "$configJsonPath.backup.$timestamp"
        Copy-Item -Path $configJsonPath -Destination $backupFile
        Write-Info "Backed up existing config to: $backupFile"
    }
}

# Function to create settings directory
function New-SettingsDirectory {
    if (-not (Test-Path $ClaudeConfigDir)) {
        New-Item -ItemType Directory -Path $ClaudeConfigDir -Force | Out-Null
        Write-Info "Created Claude configuration directory: $ClaudeConfigDir"
    }
}

# Function to validate API key format
function Test-ApiKey {
    param([string]$ApiKey)
    
    if ($ApiKey -match '^[A-Za-z0-9_-]+$') {
        return $true
    } else {
        Write-Error "Invalid API key format. API key should contain only alphanumeric characters, hyphens, and underscores."
        return $false
    }
}

# Function to test API connection and return working base URL
function Test-ApiConnection {
    param(
        [string]$ApiKey
    )

    $testUrls = @(
        "https://api2.xcodecli.com",
        "https://api.xcodecli.com"
    )

    Write-Info "Testing API connections..."

    foreach ($baseUrl in $testUrls) {
        Write-Info "Testing $baseUrl..."

        try {
            $headers = @{
                "Content-Type" = "application/json"
                "Authorization" = "Bearer $ApiKey"
            }

            $uri = "$baseUrl/v1/models"
            $response = Invoke-RestMethod -Uri $uri -Method Get -Headers $headers -ErrorAction Stop

            if ($response.data -and $response.data.Count -gt 0) {
                Write-Success "API connection successful! Found $($response.data.Count) models at $baseUrl"
                return $baseUrl
            } else {
                Write-Warning "API responded but no models found at $baseUrl"
            }
        }
        catch {
            if ($_.Exception.Response -and $_.Exception.Response.StatusCode -eq 401) {
                Write-Warning "API key authentication failed for $baseUrl"
            } elseif ($_.Exception.Message -like "*Unable to connect*" -or $_.Exception.Message -like "*could not be resolved*") {
                Write-Warning "Cannot connect to $baseUrl"
            } else {
                Write-Warning "API test failed for $baseUrl`: $($_.Exception.Message)"
            }
        }
    }

    Write-Error "All API connections failed. Please check your API key and internet connection."
    return $null
}

# Function to create Claude Code settings
function New-Settings {
    param(
        [string]$BaseUrl,
        [string]$ApiKey
    )

    $settings = @{
        env = @{
            ANTHROPIC_BASE_URL = $BaseUrl
            ANTHROPIC_AUTH_TOKEN = $ApiKey
            DISABLE_TELEMETRY = 1
            DISABLE_ERROR_REPORTING = 1
            CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC = 1
        }
    }

    try {
        $json = $settings | ConvertTo-Json -Depth 10
        Set-Content -Path $ClaudeSettingsFile -Value $json -Encoding UTF8
        Write-Success "Claude Code settings written to: $ClaudeSettingsFile"

        # Write config.json for VSCode Claude extension
        $configJsonPath = "$ClaudeConfigDir\config.json"
        $configJson = @{ primaryApiKey = "xcodecli" }
        $configJson | ConvertTo-Json | Set-Content -Path $configJsonPath -Encoding UTF8
        Write-Success "VSCode Claude config written to: $configJsonPath"

        # Set environment variables
        Write-Info "Setting environment variables..."
        Set-EnvVariable -Name "ANTHROPIC_BASE_URL" -Value $BaseUrl
        Set-EnvVariable -Name "ANTHROPIC_AUTH_TOKEN" -Value $ApiKey
        Write-Success "Environment variables configured"

        return $true
    }
    catch {
        Write-Error "Failed to create settings file: $($_.Exception.Message)"
        return $false
    }
}

# Function to display current settings
function Show-Settings {
    if (Test-Path $ClaudeSettingsFile) {
        Write-Info "Current Claude Code settings:"
        Write-Host "----------------------------------------"
        $settings = Get-Content $ClaudeSettingsFile -Raw | ConvertFrom-Json
        $settings | ConvertTo-Json -Depth 10
        Write-Host "----------------------------------------"
    } else {
        Write-Info "No existing Claude Code settings found."
    }
}

# Main function
function Main {
    Write-Info "Claude Code Configuration Script for XCodeCLI"
    Write-Host "======================================================="
    Write-Host ""
    
    # Handle command line arguments
    if ($Help) {
        Show-Help
    }
    
    if ($Show) {
        Show-Settings
        exit 0
    }
    
    # Interactive mode if no Key provided
    if (-not $ApiKey) {
        Write-Info "Interactive setup mode"
        Write-Host ""

        # Get API key
        while ([string]::IsNullOrWhiteSpace($ApiKey)) {
            $ApiKey = Read-Host "Enter your API key"
            if ([string]::IsNullOrWhiteSpace($ApiKey)) {
                Write-Warning "API key is required"
            } elseif (-not (Test-ApiKey $ApiKey)) {
                $ApiKey = ""
            }
        }
    }
    
    # Validate inputs
    if ([string]::IsNullOrWhiteSpace($ApiKey)) {
        Write-Error "API key is required"
        Write-Info "Use -Help for usage information"
        exit 1
    }
    
    # Validate API key
    if (-not (Test-ApiKey $ApiKey)) {
        exit 1
    }
    
    $maskedKey = if ($ApiKey.Length -gt 12) {
        "$($ApiKey.Substring(0, 8))...$($ApiKey.Substring($ApiKey.Length - 4))"
    } else {
        "$($ApiKey.Substring(0, [Math]::Min(4, $ApiKey.Length)))..."
    }
    Write-Info "API Key: $maskedKey"
    Write-Host ""

    # Test API connection and get working base URL
    $BaseUrl = Test-ApiConnection -ApiKey $ApiKey

    if ([string]::IsNullOrWhiteSpace($BaseUrl)) {
        if ($Test) {
            exit 1
        }

        $continue = Read-Host "All API tests failed. Continue anyway? (y/N)"
        if ($continue -notmatch '^[Yy]$') {
            Write-Info "Setup cancelled"
            exit 1
        }

        # If user chooses to continue anyway, use default URL
        $BaseUrl = $DefaultBaseUrl
        Write-Warning "Using default URL: $BaseUrl"
    } else {
        Write-Info "Selected working base URL: $BaseUrl"
    }
    
    # Exit if test only
    if ($Test) {
        Write-Success "API test completed successfully"
        exit 0
    }
    
    # Create settings directory
    New-SettingsDirectory
    
    # Backup existing settings
    Backup-Settings
    
    # Create new settings
    if (New-Settings -BaseUrl $BaseUrl -ApiKey $ApiKey) {
        Write-Host ""
        Write-Success "Claude Code has been configured successfully!"
        Write-Info "You can now use Claude Code with your API router."
        Write-Info ""
        Write-Info "To verify the setup, run:"
        Write-Info "  claude --version"
        Write-Info ""
        Write-Info "Configuration file location: $ClaudeSettingsFile"

        if (Test-Path $ClaudeSettingsFile) {
            Write-Host ""
            Write-Info "Current settings:"
            $settings = Get-Content $ClaudeSettingsFile -Raw | ConvertFrom-Json
            $settings | ConvertTo-Json -Depth 10
        }
    } else {
        Write-Error "Failed to create Claude Code settings"
        exit 1
    }
}

# Run main function
Main