#!/usr/bin/env pwsh

<#
.SYNOPSIS
    Verifies the interactive rebase challenge solution.

.DESCRIPTION
    Checks that the user successfully cleaned up the commit history
    by combining multiple messy commits into a single clean commit.
#>

Set-Location "challenge" -ErrorAction SilentlyContinue

# Check if challenge directory exists
if (-not (Test-Path "../verify.ps1")) {
    Write-Host "Error: Please run this script from the module directory" -ForegroundColor Red
    exit 1
}

if (-not (Test-Path ".")) {
    Write-Host "Error: Challenge directory not found. Run setup.ps1 first." -ForegroundColor Red
    Set-Location ..
    exit 1
}

Write-Host "Verifying your solution..." -ForegroundColor Cyan

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

# Check commit count (should be exactly 2: initial + combined feature commit)
$commitCount = (git rev-list --count HEAD 2>$null)
if ($commitCount -ne 2) {
    Write-Host "[FAIL] Expected exactly 2 commits, found $commitCount" -ForegroundColor Red
    if ($commitCount -gt 2) {
        Write-Host "Hint: You have too many commits. Use 'git reset --soft HEAD~N' to combine them." -ForegroundColor Yellow
        Write-Host "      Where N is the number of commits to undo (should be 4 in this case)." -ForegroundColor Yellow
    } else {
        Write-Host "Hint: You may have reset too far back. Run ../reset.ps1 to start over." -ForegroundColor Yellow
    }
    Set-Location ..
    exit 1
}

# Get commit messages
$commits = git log --pretty=format:"%s" 2>$null
$commitArray = $commits -split "`n"

# Check that first commit is still the initial commit
if ($commitArray[1] -ne "Initial commit") {
    Write-Host "[FAIL] The initial commit should remain unchanged." -ForegroundColor Red
    Write-Host "Expected first commit: 'Initial commit'" -ForegroundColor Yellow
    Write-Host "Found: '$($commitArray[1])'" -ForegroundColor Yellow
    Set-Location ..
    exit 1
}

# Check that the second commit message is clean (not WIP, not with typos)
$featureCommit = $commitArray[0]
if ($featureCommit -match "WIP|wip") {
    Write-Host "[FAIL] Commit message still contains 'WIP'." -ForegroundColor Red
    Write-Host "Current message: '$featureCommit'" -ForegroundColor Yellow
    Write-Host "Hint: Create a clean, descriptive commit message." -ForegroundColor Yellow
    Set-Location ..
    exit 1
}

if ($featureCommit -match "validaton") {
    Write-Host "[FAIL] Commit message contains a typo ('validaton')." -ForegroundColor Red
    Write-Host "Current message: '$featureCommit'" -ForegroundColor Yellow
    Write-Host "Hint: Use a properly spelled commit message." -ForegroundColor Yellow
    Set-Location ..
    exit 1
}

# Check that commit message is not empty and has reasonable length
if ($featureCommit.Length -lt 10) {
    Write-Host "[FAIL] Commit message is too short. Be more descriptive." -ForegroundColor Red
    Write-Host "Current message: '$featureCommit'" -ForegroundColor Yellow
    Set-Location ..
    exit 1
}

# Check that required files exist
if (-not (Test-Path "user_profile.py")) {
    Write-Host "[FAIL] user_profile.py not found." -ForegroundColor Red
    Set-Location ..
    exit 1
}

if (-not (Test-Path "test_user_profile.py")) {
    Write-Host "[FAIL] test_user_profile.py not found." -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Check that user_profile.py contains all expected features
$userProfileContent = Get-Content "user_profile.py" -Raw

# Should have the class
if ($userProfileContent -notmatch "class UserProfile") {
    Write-Host "[FAIL] user_profile.py should contain UserProfile class." -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Should have validation method
if ($userProfileContent -notmatch "def validate\(") {
    Write-Host "[FAIL] user_profile.py should contain validate() method." -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Should have email format validation (the final fix from commit 3)
if ($userProfileContent -notmatch "'@'.*in.*email|email.*in.*'@'") {
    Write-Host "[FAIL] user_profile.py should contain email format validation." -ForegroundColor Red
    Write-Host "Hint: Make sure all changes from all 4 commits are included." -ForegroundColor Yellow
    Set-Location ..
    exit 1
}

# Check that test file has content
$testContent = Get-Content "test_user_profile.py" -Raw

if ($testContent -notmatch "class.*TestUserProfile") {
    Write-Host "[FAIL] test_user_profile.py should contain TestUserProfile tests." -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Check that we have at least 3 test cases
$testMatches = ([regex]::Matches($testContent, "def test_")).Count
if ($testMatches -lt 3) {
    Write-Host "[FAIL] test_user_profile.py should contain at least 3 test cases." -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Verify that the latest commit contains changes to both files
$filesInLastCommit = git diff-tree --no-commit-id --name-only -r HEAD 2>$null
if ($filesInLastCommit -notcontains "user_profile.py") {
    Write-Host "[FAIL] The feature commit should include user_profile.py" -ForegroundColor Red
    Set-Location ..
    exit 1
}

if ($filesInLastCommit -notcontains "test_user_profile.py") {
    Write-Host "[FAIL] The feature commit should include test_user_profile.py" -ForegroundColor Red
    Set-Location ..
    exit 1
}

# Success!
Write-Host "`n========================================" -ForegroundColor Green
Write-Host "SUCCESS! Challenge completed!" -ForegroundColor Green
Write-Host "========================================" -ForegroundColor Green
Write-Host "`nYou have successfully:" -ForegroundColor Cyan
Write-Host "- Combined 4 messy commits into 1 clean commit" -ForegroundColor White
Write-Host "- Created a descriptive commit message" -ForegroundColor White
Write-Host "- Preserved all code changes" -ForegroundColor White
Write-Host "- Cleaned up the commit history" -ForegroundColor White
Write-Host "`nYour commit history is now clean and professional!" -ForegroundColor Green
Write-Host "Run 'git log --oneline' to see the result.`n" -ForegroundColor Cyan
Write-Host "Key takeaway: Clean commit history makes code review easier" -ForegroundColor Yellow
Write-Host "and your project more maintainable.`n" -ForegroundColor Yellow

Set-Location ..
exit 0