package handler

import (
	"spider/internal/model"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

// DashboardHandler handles the dashboard summary endpoint.
type DashboardHandler struct {
	db *gorm.DB
}

// Get returns aggregated dashboard statistics.
// GET /dashboard
func (h *DashboardHandler) Get(c *gin.Context) {
	var channelsTotal int64
	h.db.Model(&model.Channel{}).Count(&channelsTotal)

	var merchantsRawTotal int64
	h.db.Model(&model.MerchantRaw{}).Count(&merchantsRawTotal)

	var merchantsCleanTotal int64
	h.db.Model(&model.MerchantClean{}).Count(&merchantsCleanTotal)

	var merchantsValid int64
	h.db.Model(&model.MerchantClean{}).Where("status = ?", "valid").Count(&merchantsValid)

	var navSitesTotal int64
	h.db.Model(&model.NavSite{}).Count(&navSitesTotal)

	var seedsTotal int64
	h.db.Model(&model.ManagedSeed{}).Count(&seedsTotal)

	var keywordsTotal int64
	h.db.Model(&model.ManagedKeyword{}).Count(&keywordsTotal)

	// Recent 5 tasks.
	var recentTasks []model.Task
	h.db.Order("created_at DESC").Limit(5).Find(&recentTasks)

	// Currently running task (first one).
	var runningTask *model.Task
	var rt model.Task
	if err := h.db.Where("status = ?", "running").First(&rt).Error; err == nil {
		runningTask = &rt
	}

	OK(c, gin.H{
		"channels_total":         channelsTotal,
		"merchants_raw_total":    merchantsRawTotal,
		"merchants_clean_total":  merchantsCleanTotal,
		"merchants_valid":        merchantsValid,
		"nav_sites_total":        navSitesTotal,
		"seeds_total":            seedsTotal,
		"keywords_total":         keywordsTotal,
		"recent_tasks":           recentTasks,
		"running_task":           runningTask,
	})
}