# PowerShell Script: Start Flask API Server
# Use virtual environment to run flask_api.py

# Set console encoding to UTF-8
chcp 65001 | Out-Null
[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
$OutputEncoding = [System.Text.Encoding]::UTF8

Write-Host "========================================" -ForegroundColor Cyan
Write-Host "Starting Flask API Server" -ForegroundColor Cyan
Write-Host "========================================" -ForegroundColor Cyan
Write-Host ""

# Change to script directory
$scriptPath = Split-Path -Parent $MyInvocation.MyCommand.Path
Set-Location $scriptPath
Write-Host "Working directory: $scriptPath" -ForegroundColor Gray
Write-Host ""

# Check if virtual environment exists
$venvPath = Join-Path $scriptPath ".venv"
if (-not (Test-Path $venvPath)) {
    Write-Host "[ERROR] Virtual environment not found (.venv directory missing)" -ForegroundColor Red
    Write-Host "Please run setup_venv.bat first to create virtual environment" -ForegroundColor Yellow
    Write-Host ""
    Read-Host "Press Enter to exit"
    exit 1
}

# Check if activation script exists
$activateScript = Join-Path $venvPath "Scripts\Activate.ps1"
if (-not (Test-Path $activateScript)) {
    Write-Host "[ERROR] Virtual environment activation script not found" -ForegroundColor Red
    Write-Host "Path: $activateScript" -ForegroundColor Yellow
    Write-Host "Please recreate the virtual environment" -ForegroundColor Yellow
    Write-Host ""
    Read-Host "Press Enter to exit"
    exit 1
}

# Check if flask_api.py exists
$flaskApiFile = Join-Path $scriptPath "flask_api.py"
if (-not (Test-Path $flaskApiFile)) {
    Write-Host "[ERROR] flask_api.py file not found" -ForegroundColor Red
    Write-Host "Path: $flaskApiFile" -ForegroundColor Yellow
    Write-Host ""
    Read-Host "Press Enter to exit"
    exit 1
}

Write-Host "Activating virtual environment..." -ForegroundColor Green
try {
    # Activate virtual environment
    & $activateScript
    Write-Host "Virtual environment activated" -ForegroundColor Green
    Write-Host ""
} catch {
    Write-Host "[ERROR] Error activating virtual environment: $_" -ForegroundColor Red
    Read-Host "Press Enter to exit"
    exit 1
}

# Check if Python is available
Write-Host "Checking Python environment..." -ForegroundColor Green
$pythonPath = Join-Path $venvPath "Scripts\python.exe"
if (-not (Test-Path $pythonPath)) {
    Write-Host "[ERROR] Python interpreter not found: $pythonPath" -ForegroundColor Red
    Read-Host "Press Enter to exit"
    exit 1
}

# Display Python version
$pythonVersion = & $pythonPath --version 2>&1
Write-Host "Python version: $pythonVersion" -ForegroundColor Gray
Write-Host ""

# Start Flask API server
Write-Host "========================================" -ForegroundColor Cyan
Write-Host "Starting Flask API Server..." -ForegroundColor Cyan
Write-Host "========================================" -ForegroundColor Cyan
Write-Host ""
Write-Host "Server will start at http://localhost:5050" -ForegroundColor Yellow
Write-Host "Press Ctrl+C to stop the server" -ForegroundColor Yellow
Write-Host ""

try {
    # Run flask_api.py using Python from virtual environment
    & $pythonPath flask_api.py
} catch {
    Write-Host ""
    Write-Host "[ERROR] Error running Flask API: $_" -ForegroundColor Red
    Read-Host "Press Enter to exit"
    exit 1
} finally {
    Write-Host ""
    Write-Host "Server stopped" -ForegroundColor Gray
}