#!/usr/bin/env pwsh

<#
.SYNOPSIS
    Verifies the Module 01 challenge solution.

.DESCRIPTION
    Checks if the student has correctly:
    - Initialized a git repository
    - Created at least one commit
    - Committed both required files (welcome.txt and instructions.txt)
#>

Write-Host "Verifying Module 01: Git Basics Challenge..." -ForegroundColor Cyan
Write-Host ""

$allChecksPassed = $true

# Check if challenge directory exists
if (-not (Test-Path "challenge")) {
    Write-Host "[FAIL] Challenge directory not found. Run setup.ps1 first." -ForegroundColor Red
    exit 1
}

Set-Location "challenge"

# Check if git repository exists
if (-not (Test-Path ".git")) {
    Write-Host "[FAIL] No git repository found. Did you run 'git init'?" -ForegroundColor Red
    Set-Location ".."
    exit 1
}

Write-Host "[PASS] Git repository initialized" -ForegroundColor Green

# Check if there are any commits
$commitCount = (git rev-list --all --count 2>$null)
if ($null -eq $commitCount -or $commitCount -eq 0) {
    Write-Host "[FAIL] No commits found. Have you committed your changes?" -ForegroundColor Red
    $allChecksPassed = $false
} else {
    Write-Host "[PASS] Found $commitCount commit(s)" -ForegroundColor Green
}

# Check if both files are in the git history using git ls-tree
if ($commitCount -gt 0) {
    $trackedFiles = git ls-tree -r HEAD --name-only 2>$null

    if ($trackedFiles -match "welcome.txt") {
        Write-Host "[PASS] welcome.txt is committed" -ForegroundColor Green
    } else {
        Write-Host "[FAIL] welcome.txt is not in the commit history" -ForegroundColor Red
        $allChecksPassed = $false
    }

    if ($trackedFiles -match "instructions.txt") {
        Write-Host "[PASS] instructions.txt is committed" -ForegroundColor Green
    } else {
        Write-Host "[FAIL] instructions.txt is not in the commit history" -ForegroundColor Red
        $allChecksPassed = $false
    }
}

# Check for uncommitted changes
$statusOutput = git status --porcelain 2>$null
if ($statusOutput) {
    Write-Host "[INFO] You have uncommitted changes. This is OK, but make sure all required files are committed." -ForegroundColor Yellow
}

Set-Location ".."

Write-Host ""
if ($allChecksPassed) {
    Write-Host "========================================" -ForegroundColor Green
    Write-Host "  CONGRATULATIONS! Challenge Complete!  " -ForegroundColor Green
    Write-Host "========================================" -ForegroundColor Green
    Write-Host ""
    Write-Host "You've mastered the basics of git!" -ForegroundColor Cyan
    Write-Host "You can now move on to Module 02." -ForegroundColor Cyan
    Write-Host ""
} else {
    Write-Host "========================================" -ForegroundColor Red
    Write-Host "  Challenge Not Complete - Try Again!  " -ForegroundColor Red
    Write-Host "========================================" -ForegroundColor Red
    Write-Host ""
    Write-Host "Review the errors above and try again." -ForegroundColor Yellow
    Write-Host "Hint: Check 'git log' and 'git status' to see what you've done." -ForegroundColor Yellow
    Write-Host ""
    exit 1
}