#!/bin/bash

VERSION=$1

# Check if version is provided
if [ -z "$VERSION" ]; then
    echo "❌ Error: Version number is required"
    echo "Usage: ./bin/release <version>"
    echo "Example: ./bin/release 1.0.0"
    exit 1
fi

# Check if gh CLI is installed
if ! command -v gh &> /dev/null; then
    echo "❌ Error: GitHub CLI (gh) is not installed"
    echo "Please install it from: https://cli.github.com/"
    exit 1
fi

# Check if we're in a git repository
if ! git rev-parse --git-dir > /dev/null 2>&1; then
    echo "❌ Error: Not in a git repository"
    exit 1
fi

# Check if there are uncommitted changes
if ! git diff-index --quiet HEAD --; then
    echo "❌ Error: There are uncommitted changes. Please commit or stash them first."
    exit 1
fi

# Get default branch from GitHub with better error handling
echo "🔍 Getting default branch from GitHub..."
DEFAULT_BRANCH_JSON=$(gh repo view --json defaultBranchRef 2>/dev/null)
if [ $? -ne 0 ]; then
    echo "❌ Error: Failed to get repository information from GitHub"
    echo "   Please check your GitHub CLI authentication and repository access"
    exit 1
fi

DEFAULT_BRANCH=$(echo "$DEFAULT_BRANCH_JSON" | grep -o '"name":"[^"]*"' | cut -d'"' -f4)
if [ -z "$DEFAULT_BRANCH" ]; then
    echo "⚠️  Warning: Could not determine default branch, using 'main'"
    DEFAULT_BRANCH="main"
fi

echo "📌 Local HEAD: $(git rev-parse HEAD)"
echo "📌 GitHub default branch: $DEFAULT_BRANCH"

# Fetch latest changes from remote
echo "🔄 Fetching latest changes from remote..."
git fetch origin

# Check if local branch is up-to-date with remote
LOCAL_HEAD=$(git rev-parse HEAD)
REMOTE_HEAD=$(git rev-parse origin/$DEFAULT_BRANCH 2>/dev/null)

if [ -z "$REMOTE_HEAD" ]; then
    echo "❌ Error: Could not find remote branch origin/$DEFAULT_BRANCH"
    exit 1
fi

if [ "$LOCAL_HEAD" != "$REMOTE_HEAD" ]; then
    echo "❌ Error: Local branch is not up-to-date with remote"
    echo "   Local HEAD:  $LOCAL_HEAD"
    echo "   Remote HEAD: $REMOTE_HEAD"
    echo "   Please pull the latest changes: git pull origin $DEFAULT_BRANCH"
    exit 1
fi

echo "✅ Local repository is up-to-date with remote"

# Define the path to MollieApiClient.php
MOLLIE_CLIENT_FILE="src/MollieApiClient.php"

# Check if MollieApiClient.php exists
if [ ! -f "$MOLLIE_CLIENT_FILE" ]; then
    echo "❌ Error: MollieApiClient.php not found at $MOLLIE_CLIENT_FILE"
    exit 1
fi

# Check if tag already exists
if git tag -l | grep -q "^v$VERSION$"; then
    echo "❌ Error: Tag v$VERSION already exists"
    exit 1
fi

echo "🔄 Updating CLIENT_VERSION to $VERSION in MollieApiClient.php..."

# Update the CLIENT_VERSION constant in MollieApiClient.php
if sed -i.bak "s/public const CLIENT_VERSION = '[^']*'/public const CLIENT_VERSION = '$VERSION'/g" "$MOLLIE_CLIENT_FILE"; then
    echo "✅ CLIENT_VERSION updated successfully"
    # Remove backup file created by sed
    rm "${MOLLIE_CLIENT_FILE}.bak"
else
    echo "❌ Error: Failed to update CLIENT_VERSION"
    exit 1
fi

# Check if the version was actually updated
if grep -q "CLIENT_VERSION = '$VERSION'" "$MOLLIE_CLIENT_FILE"; then
    echo "✅ Version update verified"
else
    echo "❌ Error: Version update verification failed"
    exit 1
fi

# Commit the version update
echo "📝 Committing version update..."
git add "$MOLLIE_CLIENT_FILE"
git commit -m "Update CLIENT_VERSION to $VERSION"

echo "🏷️  Creating tag v$VERSION..."

# Create tag and push
git tag -a "v$VERSION" -m "Release $VERSION"
git push origin "v$VERSION"

echo "⏱️  Waiting for GitHub to recognize the new tag..."
sleep 3

# Verify tag exists on GitHub
echo "🔍 Verifying tag exists on GitHub..."
TAG_CHECK=$(gh release list --repo mollie/mollie-api-php 2>/dev/null | grep "v$VERSION" || echo "")
if [ -n "$TAG_CHECK" ]; then
    echo "❌ Error: Release v$VERSION already exists on GitHub"
    exit 1
fi

# Double-check that we can see the tag
GH_TAG_CHECK=$(gh api repos/mollie/mollie-api-php/git/refs/tags/v$VERSION 2>/dev/null || echo "not_found")
if [ "$GH_TAG_CHECK" = "not_found" ]; then
    echo "⚠️  Warning: Tag not immediately visible on GitHub, waiting longer..."
    sleep 5
fi

echo "🚀 Creating GitHub release..."

# Generate release from current HEAD with better error handling
RELEASE_OUTPUT=$(gh release create "v$VERSION" \
  --target "$(git rev-parse HEAD)" \
  --latest \
  --generate-notes 2>&1)

if [ $? -eq 0 ]; then
    echo "✅ Release v$VERSION created successfully!"
    echo "$RELEASE_OUTPUT"
else
    echo "❌ Error: Failed to create GitHub release"
    echo "$RELEASE_OUTPUT"
    echo ""
    echo "🔍 Troubleshooting tips:"
    echo "   1. Check if you have write permissions to the repository"
    echo "   2. Verify your GitHub CLI authentication: gh auth status"
    echo "   3. Try creating the release manually on GitHub.com"
    echo "   4. Check if the tag was created successfully: git tag -l | grep v$VERSION"
    exit 1
fi