package handlers

import (
	"database/sql"
	"log"
	"net/http"

	httpHelpers "synlotto-website/helpers/http"
	securityHelpers "synlotto-website/helpers/security"
	templateHelpers "synlotto-website/helpers/template"

	"synlotto-website/models"
	"synlotto-website/storage"
)

var (
	total, winners int
	prizeSum       float64
)

func AdminDashboardHandler(db *sql.DB) http.HandlerFunc {
	return httpHelpers.AuthMiddleware(func(w http.ResponseWriter, r *http.Request) {
		userID, ok := securityHelpers.GetCurrentUserID(r)
		if !ok {
			http.Redirect(w, r, "/account/login", http.StatusSeeOther)
			return
		}

		user := storage.GetUserByID(db, userID)
		if user == nil {
			http.Error(w, "User not found", http.StatusUnauthorized)
			return
		}

		data := models.TemplateData{}
		context := templateHelpers.TemplateContext(w, r, data)
		context["User"] = user
		context["IsAdmin"] = user.IsAdmin
		// Missing messages, notifications, potentially syndicate notifictions if that becomes a new top bar icon.
		db.QueryRow(`SELECT COUNT(*), SUM(CASE WHEN is_winner THEN 1 ELSE 0 END), SUM(prize_amount) FROM my_tickets`).Scan(&total, &winners, &prizeSum)
		context["Stats"] = map[string]interface{}{
			"TotalTickets":     total,
			"TotalWinners":     winners,
			"TotalPrizeAmount": prizeSum,
		}

		rows, err := db.Query(`
			SELECT run_at, triggered_by, tickets_matched, winners_found, COALESCE(notes, '') 
			FROM log_ticket_matching 
			ORDER BY run_at DESC LIMIT 10
		`)
		if err != nil {
			log.Println("⚠️ Failed to load logs:", err)
		}
		defer rows.Close()

		var logs []models.MatchLog
		for rows.Next() {
			var logEntry models.MatchLog
			err := rows.Scan(&logEntry.RunAt, &logEntry.TriggeredBy, &logEntry.TicketsMatched, &logEntry.WinnersFound, &logEntry.Notes)
			if err != nil {
				log.Println("⚠️ Failed to scan log row:", err)
				continue
			}
			logs = append(logs, logEntry)
		}
		context["MatchLogs"] = logs

		tmpl := templateHelpers.LoadTemplateFiles("dashboard.html", "templates/admin/dashboard.html")

		err = tmpl.ExecuteTemplate(w, "layout", context)
		if err != nil {
			http.Error(w, "Failed to render dashboard", http.StatusInternalServerError)
		}
	})
}