# PowerShell script to purge nested git configurations
# Run this from your repository root

param(
    [string]$RepoPath = ".",
    [switch]$DryRun = $false
)

$ErrorActionPreference = "Continue"
$itemsRemoved = @()
$itemsFailed = @()

# Get absolute path
$absPath = Resolve-Path $RepoPath
Write-Host "Scanning repository: $absPath" -ForegroundColor Cyan
Write-Host "Mode: $(if ($DryRun) { 'DRY RUN (no changes will be made)' } else { 'LIVE (files will be deleted)' })" -ForegroundColor Yellow
Write-Host ""

# Find nested .git directories (excluding root)
Write-Host "Scanning for nested .git directories..." -ForegroundColor Cyan
$gitDirs = Get-ChildItem -Path $absPath -Recurse -Directory -Force -Filter ".git" -ErrorAction SilentlyContinue | 
    Where-Object { $_.FullName -ne "$absPath\.git" }

if ($gitDirs) {
    Write-Host "Found $($gitDirs.Count) nested .git directory(ies):" -ForegroundColor Yellow
    foreach ($dir in $gitDirs) {
        $relativePath = $dir.FullName.Substring($absPath.Path.Length + 1)
        Write-Host "  - $relativePath" -ForegroundColor Gray
        if (-not $DryRun) {
            try {
                Remove-Item -Recurse -Force $dir.FullName -ErrorAction Stop
                $itemsRemoved += $relativePath
                Write-Host "    DELETED" -ForegroundColor Green
            } catch {
                $itemsFailed += $relativePath
                Write-Host "    FAILED: $_" -ForegroundColor Red
            }
        }
    }
} else {
    Write-Host "No nested .git directories found." -ForegroundColor Green
}

Write-Host ""

# Find nested .gitignore files (excluding root and .specstory)
Write-Host "Scanning for nested .gitignore files..." -ForegroundColor Cyan
$gitignores = Get-ChildItem -Path $absPath -Recurse -File -Force -Filter ".gitignore" -ErrorAction SilentlyContinue | 
    Where-Object { 
        $_.FullName -ne "$absPath\.gitignore" -and 
        $_.FullName -notlike "*\.specstory\*"
    }

if ($gitignores) {
    Write-Host "Found $($gitignores.Count) nested .gitignore file(s):" -ForegroundColor Yellow
    foreach ($file in $gitignores) {
        $relativePath = $file.FullName.Substring($absPath.Path.Length + 1)
        Write-Host "  - $relativePath" -ForegroundColor Gray
        if (-not $DryRun) {
            try {
                Remove-Item -Force $file.FullName -ErrorAction Stop
                $itemsRemoved += $relativePath
                Write-Host "    DELETED" -ForegroundColor Green
            } catch {
                $itemsFailed += $relativePath
                Write-Host "    FAILED: $_" -ForegroundColor Red
            }
        }
    }
} else {
    Write-Host "No nested .gitignore files found." -ForegroundColor Green
}

Write-Host ""

# Find nested .gitattributes files (excluding root)
Write-Host "Scanning for nested .gitattributes files..." -ForegroundColor Cyan
$gitattributes = Get-ChildItem -Path $absPath -Recurse -File -Force -Filter ".gitattributes" -ErrorAction SilentlyContinue | 
    Where-Object { $_.FullName -ne "$absPath\.gitattributes" }

if ($gitattributes) {
    Write-Host "Found $($gitattributes.Count) nested .gitattributes file(s):" -ForegroundColor Yellow
    foreach ($file in $gitattributes) {
        $relativePath = $file.FullName.Substring($absPath.Path.Length + 1)
        Write-Host "  - $relativePath" -ForegroundColor Gray
        if (-not $DryRun) {
            try {
                Remove-Item -Force $file.FullName -ErrorAction Stop
                $itemsRemoved += $relativePath
                Write-Host "    DELETED" -ForegroundColor Green
            } catch {
                $itemsFailed += $relativePath
                Write-Host "    FAILED: $_" -ForegroundColor Red
            }
        }
    }
} else {
    Write-Host "No nested .gitattributes files found." -ForegroundColor Green
}

Write-Host ""
Write-Host "========================================" -ForegroundColor Cyan

# Summary
$totalFound = ($gitDirs.Count + $gitignores.Count + $gitattributes.Count)

if ($totalFound -eq 0) {
    Write-Host "Repository is clean! No nested git configurations found." -ForegroundColor Green
} elseif ($DryRun) {
    Write-Host "DRY RUN COMPLETE" -ForegroundColor Yellow
    Write-Host "Found $totalFound item(s) that would be removed." -ForegroundColor Yellow
    Write-Host "Run without -DryRun to actually delete these files." -ForegroundColor Cyan
} else {
    Write-Host "PURGE COMPLETE" -ForegroundColor Green
    Write-Host "Items removed: $($itemsRemoved.Count)" -ForegroundColor Green
    if ($itemsFailed.Count -gt 0) {
        Write-Host "Items failed: $($itemsFailed.Count)" -ForegroundColor Red
        foreach ($item in $itemsFailed) {
            Write-Host "  - $item" -ForegroundColor Red
        }
    }
}

Write-Host "========================================" -ForegroundColor Cyan