package handlers

import (
	"net/http"
	"time"

	"github.com/ansible-deploy/internal/models"
	"github.com/ansible-deploy/internal/services"
	"github.com/gin-gonic/gin"
)

// AnsibleHandler API处理器
type AnsibleHandler struct {
	service *services.AnsibleService
}

// NewAnsibleHandler 创建处理器
func NewAnsibleHandler(svc *services.AnsibleService) *AnsibleHandler {
	return &AnsibleHandler{service: svc}
}

// ListHosts 获取主机列表
func (h *AnsibleHandler) ListHosts(c *gin.Context) {
	hosts := h.service.ListHosts()
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": hosts,
	})
}

// AddHost 添加主机
func (h *AnsibleHandler) AddHost(c *gin.Context) {
	var host models.Host
	if err := c.ShouldBindJSON(&host); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误: " + err.Error(),
		})
		return
	}

	if err := h.service.AddHost(host); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "主机添加成功",
	})
}

// DeleteHost 删除主机
func (h *AnsibleHandler) DeleteHost(c *gin.Context) {
	id := c.Param("id")
	if err := h.service.DeleteHost(id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "主机删除成功",
	})
}

// UpdateHost 更新主机
func (h *AnsibleHandler) UpdateHost(c *gin.Context) {
	id := c.Param("id")
	var host models.Host
	if err := c.ShouldBindJSON(&host); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	if err := h.service.UpdateHost(id, host); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "主机更新成功",
	})
}

// TestConnection 测试连接
func (h *AnsibleHandler) TestConnection(c *gin.Context) {
	id := c.Param("id")
	result, err := h.service.TestConnection(id)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": result,
	})
}

// ListGroups 获取组列表
func (h *AnsibleHandler) ListGroups(c *gin.Context) {
	groups := h.service.ListGroups()
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": groups,
	})
}

// CreateGroup 创建组
func (h *AnsibleHandler) CreateGroup(c *gin.Context) {
	var group models.HostGroup
	if err := c.ShouldBindJSON(&group); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	if err := h.service.CreateGroup(group); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "组创建成功",
	})
}

// DeleteGroup 删除组
func (h *AnsibleHandler) DeleteGroup(c *gin.Context) {
	name := c.Param("name")
	if err := h.service.DeleteGroup(name); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "组删除成功",
	})
}

// UpdateGroup 更新组
func (h *AnsibleHandler) UpdateGroup(c *gin.Context) {
	name := c.Param("name")
	var group models.HostGroup
	if err := c.ShouldBindJSON(&group); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	if err := h.service.UpdateGroup(name, group); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "组更新成功",
	})
}

// ListPlaybooks 列出Playbooks
func (h *AnsibleHandler) ListPlaybooks(c *gin.Context) {
	playbooks := h.service.ListPlaybooks()
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": playbooks,
	})
}

// GetPlaybook 获取Playbook详情
func (h *AnsibleHandler) GetPlaybook(c *gin.Context) {
	name := c.Param("name")
	playbook, err := h.service.GetPlaybook(name)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"code": 404,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": playbook,
	})
}

// ExecutePlaybook 执行Playbook
func (h *AnsibleHandler) ExecutePlaybook(c *gin.Context) {
	var req models.PlaybookExecutionRequest

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误: " + err.Error(),
		})
		return
	}

	task, err := h.service.ExecutePlaybook(req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code":   0,
		"msg":    "任务已启动",
		"taskId": task.ID,
	})
}

// ExecuteCommand 执行命令
func (h *AnsibleHandler) ExecuteCommand(c *gin.Context) {
	var req models.CommandRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误: " + err.Error(),
		})
		return
	}

	results, err := h.service.ExecuteCommand(req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": results,
	})
}

// BatchExecute 批量执行
func (h *AnsibleHandler) BatchExecute(c *gin.Context) {
	var req models.CommandRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	result := h.service.BatchExecute(req)
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "任务已启动",
		"data": result,
	})
}

// ListTasks 获取任务列表
func (h *AnsibleHandler) ListTasks(c *gin.Context) {
	tasks := h.service.ListTasks()
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": tasks,
	})
}

// GetTask 获取任务详情
func (h *AnsibleHandler) GetTask(c *gin.Context) {
	id := c.Param("id")
	task := h.service.GetTask(id)
	if task == nil {
		c.JSON(http.StatusNotFound, gin.H{
			"code": 404,
			"msg":  "任务不存在",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": task,
	})
}

// StreamTaskOutput SSE 流式推送任务日志
func (h *AnsibleHandler) StreamTaskOutput(c *gin.Context) {
	id := c.Param("id")
	task := h.service.GetTask(id)
	if task == nil {
		c.JSON(http.StatusNotFound, gin.H{"code": 404, "msg": "任务不存在"})
		return
	}

	c.Header("Content-Type", "text/event-stream")
	c.Header("Cache-Control", "no-cache")
	c.Header("Connection", "keep-alive")

	lastLen := 0
	for {
		// 检查客户端是否断开
		if c.Request.Context().Err() != nil {
			return
		}

		task := h.service.GetTask(id)
		if task == nil {
			return
		}

		output := task.Output
		if len(output) > lastLen {
			// 只发送增量
			increment := output[lastLen:]
			lastLen = len(output)
			c.SSEvent("log", increment)
			c.Writer.Flush()
		}

		if task.Status != "running" {
			// 任务完成，发送最终状态
			c.SSEvent("status", task.Status)
			c.SSEvent("error", task.Error)
			c.Writer.Flush()
			return
		}

		// 等 500ms 再推送
		select {
		case <-time.After(500 * time.Millisecond):
		case <-c.Request.Context().Done():
			return
		}
	}
}

// CancelTask 取消任务
func (h *AnsibleHandler) CancelTask(c *gin.Context) {
	id := c.Param("id")
	if err := h.service.CancelTask(id); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "任务已取消",
	})
}

// CreatePlaybook 创建Playbook
func (h *AnsibleHandler) CreatePlaybook(c *gin.Context) {
	var req struct {
		Name    string `json:"name" binding:"required"`
		Content string `json:"content"`
	}

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误: " + err.Error(),
		})
		return
	}

	if req.Content == "" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "Playbook内容不能为空",
		})
		return
	}

	if err := h.service.CreatePlaybook(req.Name, req.Content); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "Playbook创建成功",
	})
}

// DeletePlaybook 删除Playbook
func (h *AnsibleHandler) DeletePlaybook(c *gin.Context) {
	name := c.Param("name")
	if err := h.service.DeletePlaybook(name); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "Playbook删除成功",
	})
}

// GetPlaybookContent 获取Playbook内容
func (h *AnsibleHandler) GetPlaybookContent(c *gin.Context) {
	name := c.Param("name")
	content, err := h.service.GetPlaybookContent(name)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"code": 404,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": content,
	})
}

// UpdatePlaybook 更新Playbook
func (h *AnsibleHandler) UpdatePlaybook(c *gin.Context) {
	name := c.Param("name")
	var req struct {
		Content string `json:"content" binding:"required"`
	}

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	if err := h.service.UpdatePlaybook(name, req.Content); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "Playbook更新成功",
	})
}

// WebSocketLogs WebSocket日志
func (h *AnsibleHandler) WebSocketLogs(c *gin.Context) {
	taskID := c.Param("taskId")
	_ = taskID
	// WebSocket实现需要单独处理，这里返回提示
	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "WebSocket连接",
	})
}