// internal/handlers/admin/dashboard.go
package handlers

// ToDo: move SQL into storage layer
import (
	"log"
	"net/http"

	templateHandlers "synlotto-website/internal/handlers/template"
	security "synlotto-website/internal/helpers/security"
	templateHelpers "synlotto-website/internal/helpers/template"
	"synlotto-website/internal/platform/bootstrap"
	usersStorage "synlotto-website/internal/storage/users"
)

func AdminDashboardHandler(app *bootstrap.App) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, ok := security.GetCurrentUserID(app.SessionManager, r)
		if !ok {
			http.Redirect(w, r, "/account/login", http.StatusSeeOther)
			return
		}

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

		// Shared template data (loads user, notifications, counts, etc.)
		data := templateHandlers.BuildTemplateData(app, w, r)
		context := templateHelpers.TemplateContext(w, r, data)
		context["User"] = user
		context["IsAdmin"] = user.IsAdmin

		// Quick stats (keep here for now; move to storage soon)
		var (
			total, winners int
			prizeSum       float64
		)
		if err := app.DB.QueryRow(`
			SELECT COUNT(*),
			       SUM(CASE WHEN is_winner THEN 1 ELSE 0 END),
			       COALESCE(SUM(prize_amount), 0)
			FROM my_tickets
		`).Scan(&total, &winners, &prizeSum); err != nil {
			log.Println("⚠️ Failed to load ticket stats:", err)
		}
		context["Stats"] = map[string]interface{}{
			"TotalTickets":     total,
			"TotalWinners":     winners,
			"TotalPrizeAmount": prizeSum,
		}

		// Recent matcher logs (limit 10)
		rows, err := app.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)
		} else {
			defer rows.Close()
			var logs []struct {
				RunAt          any
				TriggeredBy    string
				TicketsMatched int
				WinnersFound   int
				Notes          string
			}
			for rows.Next() {
				var e struct {
					RunAt          any
					TriggeredBy    string
					TicketsMatched int
					WinnersFound   int
					Notes          string
				}
				if err := rows.Scan(&e.RunAt, &e.TriggeredBy, &e.TicketsMatched, &e.WinnersFound, &e.Notes); err != nil {
					log.Println("⚠️ Failed to scan log row:", err)
					continue
				}
				logs = append(logs, e)
			}
			context["MatchLogs"] = logs
		}

		tmpl := templateHelpers.LoadTemplateFiles("dashboard.html", "web/templates/admin/dashboard.html")
		if err := tmpl.ExecuteTemplate(w, "layout", context); err != nil {
			http.Error(w, "Failed to render dashboard", http.StatusInternalServerError)
			return
		}
	}
}