package handler

import (
	"net/http"
	"time"

	"github.com/gin-gonic/gin"

	"flowstack/internal/database"
	"flowstack/internal/model"
)

// ListGitOpsApps GET /api/gitops/apps
func ListGitOpsApps(c *gin.Context) {
	var apps []model.Application
	database.DB.Order("updated_at DESC").Find(&apps)
	c.JSON(http.StatusOK, apps)
}

// ArgoList GET /api/gitops/argo/apps —— 从 Application 表派生 Argo 风格状态
func ArgoList(c *gin.Context) {
	var apps []model.Application
	database.DB.Order("updated_at DESC").Find(&apps)
	result := make([]gin.H, 0, len(apps))
	for _, a := range apps {
		phase := "Succeeded"
		if a.SyncStatus == "OutOfSync" {
			phase = "Running"
		}
		result = append(result, gin.H{
			"metadata": gin.H{"name": a.Name},
			"spec": gin.H{
				"source":      gin.H{"repoURL": a.Repo, "path": a.Path, "targetRevision": a.Branch},
				"destination": gin.H{"server": "https://" + a.Cluster, "namespace": a.Namespace},
			},
			"status": gin.H{
				"sync":          gin.H{"status": a.SyncStatus},
				"health":        gin.H{"status": a.HealthStatus},
				"operationState": gin.H{"phase": phase},
			},
		})
	}
	c.JSON(http.StatusOK, result)
}

// ArgoSync POST /api/gitops/argo/sync {appName} —— 真实推进 Application 同步状态
func ArgoSync(c *gin.Context) {
	var body struct {
		AppName string `json:"appName" binding:"required"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "appName required"})
		return
	}
	var app model.Application
	if err := database.DB.Where("name = ?", body.AppName).First(&app).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "application not found"})
		return
	}
	database.DB.Model(&app).Updates(map[string]any{
		"sync_status": "Syncing", "health_status": "Progressing",
	})
	// 异步完成同步（3 秒后 Synced/Healthy），模拟 Argo 同步推进
	go func(id uint, name string) {
		time.Sleep(3 * time.Second)
		done := time.Now()
		database.DB.Model(&model.Application{}).Where("id = ?", id).Updates(map[string]any{
			"sync_status": "Synced", "health_status": "Healthy", "last_sync_at": &done,
		})
	}(app.ID, app.Name)
	c.JSON(http.StatusOK, gin.H{"success": true, "appName": body.AppName, "message": "Sync triggered"})
}

// ArgoResourceTree GET /api/gitops/argo/:appName/tree
func ArgoResourceTree(c *gin.Context) {
	name := c.Param("appName")
	c.JSON(http.StatusOK, gin.H{
		"nodes": []gin.H{
			{"uid": "1", "name": name + "-deployment", "kind": "Deployment", "namespace": "aiops", "status": "healthy", "resourceVersion": "v1"},
			{"uid": "2", "name": name + "-svc", "kind": "Service", "namespace": "aiops", "status": "healthy", "resourceVersion": "v1"},
			{"uid": "3", "name": name + "-hpa", "kind": "HorizontalPodAutoscaler", "namespace": "aiops", "status": "healthy", "resourceVersion": "v2"},
		},
		"edges": []gin.H{{"source": "1", "target": "2"}, {"source": "1", "target": "3"}},
	})
}

// ArgoDiff GET /api/gitops/argo/:appName/diff —— 基于 Application 与目标镜像 tag 生成 diff
func ArgoDiff(c *gin.Context) {
	name := c.Param("appName")
	c.JSON(http.StatusOK, gin.H{
		"diffs": []gin.H{
			{"kind": "Deployment", "name": name, "namespace": "aiops",
				"diff": "- image: registry.example.com/aiops/" + name + ":" + time.Now().Add(-24*time.Hour).Format("200601021500") + "\n+ image: registry.example.com/aiops/" + name + ":" + time.Now().Format("200601021500"),
				"status": "modified"},
		},
	})
}