#!/bin/bash

# Load environment
if [ -f .env ]; then
    export $(cat .env | grep -v '^#' | xargs)
else
    echo "❌ .env file not found!"
    echo "📋 Copy .env.example to .env and configure it first"
    exit 1
fi

# Validate required variables
if [ -z "$GITEA_URL" ] || [ -z "$REPO_OWNER" ] || [ -z "$REPO_NAME" ] || [ -z "$GITEA_TOKEN" ]; then
    echo "❌ Missing required environment variables in .env"
    exit 1
fi

# Colors
GREEN='\033[0;32m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m'

log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
log_success() { echo -e "${GREEN}[SUCCESS]${NC} $1"; }
log_warning() { echo -e "${YELLOW}[WARNING]${NC} $1"; }

# Get all issues with nice formatting
get_all_issues() {
    log_info "Fetching all issues..."
    echo ""
    
    response=$(curl -s "$GITEA_URL/api/v1/repos/$REPO_OWNER/$REPO_NAME/issues" \
        -H "Authorization: token $GITEA_TOKEN")
    
    if [ $? -ne 0 ]; then
        echo "❌ Error fetching issues"
        return 1
    fi
    
    echo "$response" | jq -r '.[] | 
        "🎯 #\(.number) \(.title)",
        "   📊 State: \(.state) | 🏷️ Labels: \(.labels | map(.name) | join(", ") // "none")",
        "   🔗 \(.html_url)",
        ""'
}

# Get issues by label
get_issues_by_label() {
    local label="$1"
    log_info "Fetching issues with label: $label"
    echo ""
    
    response=$(curl -s "$GITEA_URL/api/v1/repos/$REPO_OWNER/$REPO_NAME/issues?labels=$label" \
        -H "Authorization: token $GITEA_TOKEN")
    
    echo "$response" | jq -r '.[] | 
        "🎯 #\(.number) \(.title)",
        "   📊 \(.state) | 🔗 \(.html_url)",
        ""'
}

# Get issue details
get_issue_details() {
    local issue_number="$1"
    log_info "Fetching details for issue #$issue_number"
    echo ""
    
    response=$(curl -s "$GITEA_URL/api/v1/repos/$REPO_OWNER/$REPO_NAME/issues/$issue_number" \
        -H "Authorization: token $GITEA_TOKEN")
    
    echo "$response" | jq -r '
        "🎯 Issue #\(.number): \(.title)",
        "📊 State: \(.state)",
        "👤 Assignees: \(.assignees | map(.login) | join(", ") // "none")",
        "🏷️ Labels: \(.labels | map(.name) | join(", ") // "none")",
        "📅 Created: \(.created_at)",
        "🔗 URL: \(.html_url)",
        "",
        "📝 Body:",
        "\(.body // "No description")",
        ""'
}

# Close issue
close_issue() {
    local issue_number="$1"
    log_info "Closing issue #$issue_number"
    
    response=$(curl -s -w "\n%{http_code}" -X PATCH \
        "$GITEA_URL/api/v1/repos/$REPO_OWNER/$REPO_NAME/issues/$issue_number" \
        -H "Authorization: token $GITEA_TOKEN" \
        -H "Content-Type: application/json" \
        -d '{"state": "closed"}')
    
    http_code=$(echo "$response" | tail -n1)
    if [ "$http_code" = "201" ]; then
        log_success "Issue #$issue_number closed"
    else
        echo "❌ Failed to close issue (HTTP: $http_code)"
    fi
}

# Get pipeline status (issues grouped by Kanban columns for Furt)
get_pipeline_status() {
    log_info "Furt API Gateway - Pipeline Status Overview"
    echo ""
    
    echo "🔧 SERVICE REQUESTS:"
    get_issues_by_label "service-request" | head -10
    
    echo "🏗️ ARCHITECTURE DISCUSSIONS:"
    get_issues_by_label "architecture"
    
    echo "🚀 PERFORMANCE OPTIMIZATIONS:"
    get_issues_by_label "performance"
    
    echo "🔒 SECURITY REVIEWS:"
    get_issues_by_label "security"
    
    echo "🐛 BUGS:"
    get_issues_by_label "bug"
    
    echo "🌐 HUGO INTEGRATIONS:"
    get_issues_by_label "hugo-integration"
    
    echo "📋 WORK IN PROGRESS:"
    get_issues_by_label "enhancement" | head -5
}

# Issue statistics
get_stats() {
    log_info "Furt API Gateway - Issue Statistics"
    echo ""
    
    all_issues=$(curl -s "$GITEA_URL/api/v1/repos/$REPO_OWNER/$REPO_NAME/issues" \
        -H "Authorization: token $GITEA_TOKEN")
    
    total=$(echo "$all_issues" | jq length)
    open=$(echo "$all_issues" | jq '[.[] | select(.state == "open")] | length')
    closed=$(echo "$all_issues" | jq '[.[] | select(.state == "closed")] | length')
    
    echo "📊 Total Issues: $total"
    echo "✅ Open: $open"
    echo "🔒 Closed: $closed"
    echo ""
    
    echo "🏷️ Furt Labels:"
    echo "$all_issues" | jq -r '[.[] | .labels[].name] | group_by(.) | map({label: .[0], count: length}) | sort_by(.count) | reverse | limit(10; .[]) | "   \(.label): \(.count)"'
}

case "${1:-help}" in
    "all"|"")
        get_all_issues
        ;;
    "gateway")
        get_issues_by_label "gateway"
        ;;
    "service-request")
        get_issues_by_label "service-request"
        ;;
    "service-formular2mail")
        get_issues_by_label "service-formular2mail"
        ;;
    "service-sagjan")
        get_issues_by_label "service-sagjan"
        ;;
    "architecture")
        get_issues_by_label "architecture"
        ;;
    "performance")
        get_issues_by_label "performance"
        ;;
    "security")
        get_issues_by_label "security"
        ;;
    "bug")
        get_issues_by_label "bug"
        ;;
    "enhancement")
        get_issues_by_label "enhancement"
        ;;
    "hugo")
        get_issues_by_label "hugo-integration"
        ;;
    "deployment")
        get_issues_by_label "deployment"
        ;;
    "testing")
        get_issues_by_label "testing"
        ;;
    "documentation")
        get_issues_by_label "documentation"
        ;;
    "pipeline")
        get_pipeline_status
        ;;
    "stats")
        get_stats
        ;;
    "close")
        if [ -z "$2" ]; then
            echo "Usage: $0 close ISSUE_NUMBER"
            exit 1
        fi
        close_issue "$2"
        ;;
    [0-9]*)
        get_issue_details "$1"
        ;;
    *)
        echo "🎯 Furt API Gateway - Issues Manager"
        echo ""
        echo "Usage: $0 [COMMAND] [OPTIONS]"
        echo ""
        echo "📋 List Commands:"
        echo "  all                 List all issues (default)"
        echo "  gateway             Gateway core issues"
        echo "  service-request     New service requests"
        echo "  service-formular2mail  Formular2mail service issues"
        echo "  service-sagjan      Sagjan service issues"
        echo "  architecture        Architecture discussions"
        echo "  performance         Performance optimizations"
        echo "  security            Security reviews"
        echo "  bug                 Bug reports"
        echo "  enhancement         New features"
        echo "  hugo                Hugo integration issues"
        echo "  deployment          Deployment issues"
        echo "  testing             Testing issues"
        echo "  documentation       Documentation updates"
        echo ""
        echo "📊 Analysis Commands:"
        echo "  pipeline            Kanban pipeline status"
        echo "  stats               Issue statistics"
        echo ""
        echo "⚙️ Management Commands:"
        echo "  close NUM           Close issue #NUM"
        echo "  NUM                 Show details for issue #NUM"
        echo ""
        echo "🚀 Examples:"
        echo "  $0                  # List all issues"
        echo "  $0 pipeline         # Show pipeline status"
        echo "  $0 service-request  # Show service requests"
        echo "  $0 gateway          # Show gateway issues"
        echo "  $0 5                # Show issue #5 details"
        echo "  $0 close 3          # Close issue #3"
        ;;
esac