<#
.SYNOPSIS
    Pre-Commit Validation Script for Windows

.DESCRIPTION
    Run this script before committing to ensure all CI checks will pass.
    Wraps the Bash validation script via WSL2 or Git Bash.

.PARAMETER Level
    Validation level:
    - quick : Smoke test only (~2 min)
    - pr    : Full PR-gating suite (~15 min) [default]
    - full  : All tests including extended (~45 min)

.EXAMPLE
    .\validate-before-commit.ps1
    Run PR-gating validation

.EXAMPLE
    .\validate-before-commit.ps1 quick
    Run quick smoke test only

.EXAMPLE
    .\validate-before-commit.ps1 full
    Run full test suite
#>

[CmdletBinding()]
param(
    [Parameter(Position = 0)]
    [ValidateSet('quick', 'pr', 'full')]
    [string]$Level = 'pr',

    [switch]$Help
)

# Script location
$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$RepoRoot = Split-Path -Parent (Split-Path -Parent $ScriptDir)

if ($Help) {
    Get-Help $MyInvocation.MyCommand.Path -Detailed
    exit 0
}

# Colors
function Write-ColoredOutput {
    param(
        [string]$Message,
        [ConsoleColor]$Color = [ConsoleColor]::White
    )
    $originalColor = $Host.UI.RawUI.ForegroundColor
    $Host.UI.RawUI.ForegroundColor = $Color
    Write-Host $Message
    $Host.UI.RawUI.ForegroundColor = $originalColor
}

function Write-Header {
    param([string]$Message)
    Write-Host ""
    Write-ColoredOutput "=============================================" -Color Cyan
    Write-ColoredOutput "  $Message" -Color Cyan
    Write-ColoredOutput "=============================================" -Color Cyan
    Write-Host ""
}

function Write-Step { Write-ColoredOutput ">>> $args" -Color Blue }
function Write-Pass { Write-ColoredOutput "[PASS] $args" -Color Green }
function Write-Fail { Write-ColoredOutput "[FAIL] $args" -Color Red }
function Write-Warn { Write-ColoredOutput "[WARN] $args" -Color Yellow }
function Write-Info { Write-ColoredOutput "[INFO] $args" -Color Cyan }

# Find Bash
function Find-BashExecutable {
    # Check WSL
    $wsl = Get-Command wsl -ErrorAction SilentlyContinue
    if ($wsl) {
        $wslCheck = & wsl --status 2>&1
        if ($LASTEXITCODE -eq 0) {
            return @{ Type = 'wsl'; Path = 'wsl' }
        }
    }

    # Check Git Bash
    $gitBashPaths = @(
        "C:\Program Files\Git\bin\bash.exe",
        "C:\Program Files (x86)\Git\bin\bash.exe",
        "$env:LOCALAPPDATA\Programs\Git\bin\bash.exe"
    )

    foreach ($path in $gitBashPaths) {
        if (Test-Path $path) {
            return @{ Type = 'gitbash'; Path = $path }
        }
    }

    return $null
}

function Convert-ToUnixPath {
    param([string]$WindowsPath)
    if ($WindowsPath -match '^([A-Za-z]):(.*)$') {
        $drive = $Matches[1].ToLower()
        $rest = $Matches[2] -replace '\\', '/'
        return "/mnt/$drive$rest"
    }
    return $WindowsPath -replace '\\', '/'
}

# Main
Write-Header "Pre-Commit Validation (Windows)"
Write-Info "Level: $Level"
Write-Info "Repository: $RepoRoot"

$bash = Find-BashExecutable
if (-not $bash) {
    Write-Fail "Bash not found. Install WSL2 or Git for Windows."
    exit 1
}

Write-Info "Using: $($bash.Type)"

$scriptPath = Join-Path $ScriptDir "validate-before-commit.sh"
if (-not (Test-Path $scriptPath)) {
    Write-Fail "Script not found: $scriptPath"
    exit 1
}

$startTime = Get-Date

try {
    switch ($bash.Type) {
        'wsl' {
            $unixScript = Convert-ToUnixPath $scriptPath
            & wsl bash $unixScript $Level
        }
        'gitbash' {
            $unixScript = $scriptPath -replace '\\', '/'
            & $bash.Path $unixScript $Level
        }
    }
    $exitCode = $LASTEXITCODE
}
catch {
    Write-Fail "Execution failed: $_"
    $exitCode = 1
}

$duration = (Get-Date) - $startTime
$minutes = [math]::Floor($duration.TotalMinutes)
$seconds = $duration.Seconds

Write-Header "Summary"
Write-Info "Duration: ${minutes}m ${seconds}s"

if ($exitCode -eq 0) {
    Write-Host ""
    Write-ColoredOutput "=============================================" -Color Green
    Write-ColoredOutput "  ALL CHECKS PASSED - Ready to commit!" -Color Green
    Write-ColoredOutput "=============================================" -Color Green
    Write-Host ""
    Write-Host "Next steps:"
    Write-Host "  git add -A"
    Write-Host '  git commit -m "Your commit message"'
    Write-Host ""
} else {
    Write-Host ""
    Write-ColoredOutput "=============================================" -Color Red
    Write-ColoredOutput "  VALIDATION FAILED - Do not commit!" -Color Red
    Write-ColoredOutput "=============================================" -Color Red
    Write-Host ""
    Write-Host "Check the logs in: out/local-ci/logs/"
    Write-Host ""
}

exit $exitCode