package handlers

import (
	"ezops/internal/models"
	"net/http"
	"strconv"

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

// SiteHandler 站点拨测管理 handler // Logan.Li
type SiteHandler struct {
	db *gorm.DB
}

// NewSiteHandler 创建站点拨测 handler
func NewSiteHandler(db *gorm.DB) *SiteHandler {
	return &SiteHandler{db: db}
}

// ========== Site Task CRUD ==========

// ListTasks 列出拨测任务
// GET /api/v1/site/tasks?page=1&page_size=20&type=&status=
func (h *SiteHandler) ListTasks(c *gin.Context) {
	var tasks []models.SiteTask
	q := h.db.Model(&models.SiteTask{})

	if t := c.Query("type"); t != "" {
		q = q.Where("type = ?", t)
	}
	if s := c.Query("status"); s != "" {
		q = q.Where("status = ?", s)
	}
	if kw := c.Query("keyword"); kw != "" {
		q = q.Where("name LIKE ? OR url LIKE ?", "%"+kw+"%", "%"+kw+"%")
	}

	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
	var total int64
	q.Count(&total)
	q.Offset((page - 1) * pageSize).Limit(pageSize).Order("name ASC").Find(&tasks)

	if tasks == nil {
		tasks = []models.SiteTask{}
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{"list": tasks, "total": total}})
}

// CreateTask 创建拨测任务
// POST /api/v1/site/tasks
func (h *SiteHandler) CreateTask(c *gin.Context) {
	var task models.SiteTask
	if err := c.ShouldBindJSON(&task); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: err.Error()})
		return
	}
	if err := h.db.Create(&task).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: err.Error()})
		return
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Data: task, Message: "创建成功"})
}

// UpdateTask 更新拨测任务
// PUT /api/v1/site/tasks/:id
func (h *SiteHandler) UpdateTask(c *gin.Context) {
	id := c.Param("id")
	var task models.SiteTask
	if err := h.db.First(&task, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{Code: 404, Message: "任务不存在"})
		return
	}
	if err := c.ShouldBindJSON(&task); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: err.Error()})
		return
	}
	h.db.Save(&task)
	c.JSON(http.StatusOK, models.Response{Code: 200, Data: task, Message: "更新成功"})
}

// DeleteTask 删除拨测任务
// DELETE /api/v1/site/tasks/:id
func (h *SiteHandler) DeleteTask(c *gin.Context) {
	id := c.Param("id")
	if err := h.db.Delete(&models.SiteTask{}, id).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: err.Error()})
		return
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "删除成功"})
}

// BatchDeleteTasks 批量删除
// DELETE /api/v1/site/tasks/batch-delete
func (h *SiteHandler) BatchDeleteTasks(c *gin.Context) {
	var req models.IDsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: err.Error()})
		return
	}
	h.db.Where("id IN ?", req.IDs).Delete(&models.SiteTask{})
	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "批量删除成功"})
}

// ========== Site Results ==========

// ListResults 查询拨测结果
// GET /api/v1/site/results?task_id=N&from=&to=&limit=100
func (h *SiteHandler) ListResults(c *gin.Context) {
	var results []models.SiteResult
	q := h.db.Model(&models.SiteResult{})

	if tid := c.Query("task_id"); tid != "" {
		q = q.Where("task_id = ?", tid)
	}
	if from := c.Query("from"); from != "" {
		q = q.Where("created_at >= ?", from)
	}
	if to := c.Query("to"); to != "" {
		q = q.Where("created_at <= ?", to)
	}

	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "100"))
	q.Order("created_at DESC").Limit(limit).Find(&results)

	if results == nil {
		results = []models.SiteResult{}
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Data: results})
}

// ========== Site Statistics ==========

// GetSiteStats 获取拨测概览统计
// GET /api/v1/site/stats
func (h *SiteHandler) GetSiteStats(c *gin.Context) {
	var total, normal, abnormal int64
	h.db.Model(&models.SiteTask{}).Count(&total)
	h.db.Model(&models.SiteTask{}).Where("status = ?", "active").Count(&normal)
	h.db.Model(&models.SiteTask{}).Where("status = ?", "error").Count(&abnormal)

	// Calculate availability rate from recent results
	var availRate float64
	if total > 0 {
		var successCount int64
		h.db.Model(&models.SiteResult{}).
			Where("created_at > datetime('now', '-1 hour') AND status = 'success'").
			Count(&successCount)
		var totalRecent int64
		h.db.Model(&models.SiteResult{}).
			Where("created_at > datetime('now', '-1 hour')").
			Count(&totalRecent)
		if totalRecent > 0 {
			availRate = float64(successCount) / float64(totalRecent) * 100
		}
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{
		"total":       total,
		"normal":      normal,
		"abnormal":    abnormal,
		"avail_rate":  availRate,
	}})
}