package controller

import (
	"encoding/json"
	"github.com/gin-gonic/gin"
	"github.com/tidwall/gjson"
	"io"
	"message-pusher/common"
	"message-pusher/model"
	"net/http"
	"strconv"
	"strings"
)

func GetAllWebhooks(c *gin.Context) {
	userId := c.GetInt("id")
	p, _ := strconv.Atoi(c.Query("p"))
	if p < 0 {
		p = 0
	}
	webhooks, err := model.GetWebhooksByUserId(userId, p*common.ItemsPerPage, common.ItemsPerPage)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    webhooks,
	})
	return
}

func SearchWebhooks(c *gin.Context) {
	userId := c.GetInt("id")
	keyword := c.Query("keyword")
	if strings.HasPrefix(keyword, common.ServerAddress+"/webhook/") {
		keyword = strings.TrimPrefix(keyword, common.ServerAddress+"/webhook/")
	}
	webhooks, err := model.SearchWebhooks(userId, keyword)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    webhooks,
	})
	return
}

func GetWebhook(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	userId := c.GetInt("id")
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	webhook_, err := model.GetWebhookById(id, userId)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    webhook_,
	})
	return
}

func AddWebhook(c *gin.Context) {
	webhook_ := model.Webhook{}
	err := c.ShouldBindJSON(&webhook_)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	if len(webhook_.Name) == 0 || len(webhook_.Name) > 20 {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "通道名称长度必须在1-20之间",
		})
		return
	}
	cleanWebhook := model.Webhook{
		UserId:        c.GetInt("id"),
		Name:          webhook_.Name,
		Status:        common.WebhookStatusEnabled,
		Link:          common.GetUUID(),
		CreatedTime:   common.GetTimestamp(),
		Channel:       webhook_.Channel,
		ExtractRule:   webhook_.ExtractRule,
		ConstructRule: webhook_.ConstructRule,
	}
	err = cleanWebhook.Insert()
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
	})
	return
}

func DeleteWebhook(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	userId := c.GetInt("id")
	_, err := model.DeleteWebhookById(id, userId)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
	})
	return
}

func UpdateWebhook(c *gin.Context) {
	userId := c.GetInt("id")
	statusOnly := c.Query("status_only")
	webhook_ := model.Webhook{}
	err := c.ShouldBindJSON(&webhook_)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	oldWebhook, err := model.GetWebhookById(webhook_.Id, userId)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	cleanWebhook := *oldWebhook
	if statusOnly != "" {
		cleanWebhook.Status = webhook_.Status
	} else {
		// If you add more fields, please also update webhook_.Update()
		cleanWebhook.Name = webhook_.Name
		cleanWebhook.ExtractRule = webhook_.ExtractRule
		cleanWebhook.ConstructRule = webhook_.ConstructRule
		cleanWebhook.Channel = webhook_.Channel
	}
	err = cleanWebhook.Update()
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    cleanWebhook,
	})
	return
}

func TriggerWebhook(c *gin.Context) {
	jsonData, err := io.ReadAll(c.Request.Body)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	reqText := string(jsonData)
	link := c.Param("link")
	webhook, err := model.GetWebhookByLink(link)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"success": false,
			"message": "Webhook 不存在",
		})
		return
	}
	if webhook.Status != common.WebhookStatusEnabled {
		c.JSON(http.StatusForbidden, gin.H{
			"success": false,
			"message": "Webhook 未启用",
		})
		return
	}
	user, err := model.GetUserById(webhook.UserId, false)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"success": false,
			"message": "用户不存在",
		})
		return
	}
	if user.Status != common.UserStatusEnabled {
		c.JSON(http.StatusForbidden, gin.H{
			"success": false,
			"message": "用户已被封禁",
		})
		return
	}
	extractRule := make(map[string]string)
	err = json.Unmarshal([]byte(webhook.ExtractRule), &extractRule)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"success": false,
			"message": "Webhook 提取规则解析失败",
		})
		return
	}
	for key, value := range extractRule {
		variableValue := gjson.Get(reqText, value).String()
		webhook.ConstructRule = strings.Replace(webhook.ConstructRule, "$"+key, variableValue, -1)
	}
	constructRule := model.WebhookConstructRule{}
	err = json.Unmarshal([]byte(webhook.ConstructRule), &constructRule)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Webhook 构建规则解析失败",
		})
		return
	}
	message := &model.Message{
		Channel:     webhook.Channel,
		Title:       constructRule.Title,
		Description: constructRule.Description,
		Content:     constructRule.Content,
		URL:         constructRule.URL,
	}
	processMessage(c, message, user)
}