#!/usr/bin/env pwsh
<#
.SYNOPSIS
    Verifies the Module 03 challenge solution.

.DESCRIPTION
    This script checks that:
    - The challenge directory exists
    - A Git repository exists
    - The feature-login branch exists
    - The branch has at least 2 new commits
    - login.py exists in the feature branch but not in main
#>

Write-Host "`n=== Verifying Module 03 Solution ===" -ForegroundColor Cyan

$allChecksPassed = $true

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

Set-Location "challenge"

# Check if git repository exists
if (-not (Test-Path ".git")) {
    Write-Host "[FAIL] Not a git repository. Did you run setup.ps1?" -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Save current branch
$originalBranch = git branch --show-current 2>$null

# Check if feature-login branch exists
$branchExists = git branch --list "feature-login" 2>$null
if ($branchExists) {
    Write-Host "[PASS] Branch 'feature-login' exists" -ForegroundColor Green
} else {
    Write-Host "[FAIL] Branch 'feature-login' not found" -ForegroundColor Red
    Write-Host "[HINT] Create the branch with: git switch -c feature-login" -ForegroundColor Yellow
    $allChecksPassed = $false
    Set-Location ..
    exit 1
}

# Check if feature-login has commits beyond main
$commitCount = git rev-list main..feature-login --count 2>$null
if ($commitCount -ge 2) {
    Write-Host "[PASS] Branch 'feature-login' has $commitCount new commits" -ForegroundColor Green
} else {
    Write-Host "[FAIL] Branch 'feature-login' needs at least 2 new commits (found: $commitCount)" -ForegroundColor Red
    Write-Host "[HINT] Make sure you've committed login.py and made at least one more commit" -ForegroundColor Yellow
    $allChecksPassed = $false
}

# Switch to feature-login and check for login.py
git checkout feature-login 2>$null | Out-Null
if (Test-Path "login.py") {
    Write-Host "[PASS] File 'login.py' exists in feature-login branch" -ForegroundColor Green
} else {
    Write-Host "[FAIL] File 'login.py' not found in feature-login branch" -ForegroundColor Red
    Write-Host "[HINT] Create login.py and commit it to the feature-login branch" -ForegroundColor Yellow
    $allChecksPassed = $false
}

# Switch to main and verify login.py doesn't exist
git switch main 2>$null | Out-Null
if (-not (Test-Path "login.py")) {
    Write-Host "[PASS] File 'login.py' does NOT exist in main branch (branches are independent!)" -ForegroundColor Green
} else {
    Write-Host "[FAIL] File 'login.py' should not exist in main branch" -ForegroundColor Red
    Write-Host "[HINT] Make sure you created login.py only on the feature-login branch" -ForegroundColor Yellow
    $allChecksPassed = $false
}

# Switch back to original branch
if ($originalBranch) {
    git switch $originalBranch 2>$null | Out-Null
}

Set-Location ..

# Final summary
if ($allChecksPassed) {
    Write-Host "`n" -NoNewline
    Write-Host "=====================================" -ForegroundColor Green
    Write-Host "   CONGRATULATIONS! CHALLENGE PASSED!" -ForegroundColor Green
    Write-Host "=====================================" -ForegroundColor Green
    Write-Host "`nYou've successfully learned about Git branches!" -ForegroundColor Cyan
    Write-Host "You now understand:" -ForegroundColor Cyan
    Write-Host "  - How to create branches with git switch -c" -ForegroundColor White
    Write-Host "  - How to switch between branches" -ForegroundColor White
    Write-Host "  - That branches are independent lines of development" -ForegroundColor White
    Write-Host "  - That files in one branch don't affect another" -ForegroundColor White
    Write-Host "`nReady for the next module!" -ForegroundColor Green
    Write-Host ""
} else {
    Write-Host "`n[SUMMARY] Some checks failed. Review the hints above and try again." -ForegroundColor Red
    Write-Host "[INFO] You can run this verification script as many times as needed." -ForegroundColor Yellow
    Write-Host ""
    exit 1
}