package router

import (
	"chat/pkg/opencatd/db"
	"errors"
	"net/http"
	"time"

	"github.com/Sakurasan/to"
	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"gorm.io/gorm"
)

var (
	rootToken string
)

type User struct {
	IsDelete  bool   `json:"IsDelete,omitempty"`
	ID        int    `json:"id,omitempty"`
	UpdatedAt string `json:"updatedAt,omitempty"`
	Name      string `json:"name,omitempty"`
	Token     string `json:"token,omitempty"`
	CreatedAt string `json:"createdAt,omitempty"`
}

type Key struct {
	ID        int    `json:"id,omitempty"`
	Key       string `json:"key,omitempty"`
	UpdatedAt string `json:"updatedAt,omitempty"`
	Name      string `json:"name,omitempty"`
	CreatedAt string `json:"createdAt,omitempty"`
}

func AuthMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		if rootToken == "" {
			u, err := db.GetUserByID(uint(1))
			if err != nil {
				c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
				c.Abort()
				return
			}
			rootToken = u.Token
		}
		token := c.GetHeader("Authorization")
		if token == "" || token[:7] != "Bearer " || token[7:] != rootToken {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
			c.Abort()
			return
		}
		// 可以在这里对 token 进行验证并检查权限

		c.Next()
	}
}

func Handleinit(c *gin.Context) {
	user, err := db.GetUserByID(1)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			u := db.User{Name: "root", Token: uuid.NewString()}
			u.ID = 1
			if err := db.CreateUser(&u); err != nil {
				c.JSON(http.StatusOK, gin.H{
					"error": err.Error(),
				})
				return
			} else {
				rootToken = u.Token
				resJSON := User{
					false,
					int(u.ID),
					u.UpdatedAt.Format(time.RFC3339),
					u.Name,
					u.Token,
					u.CreatedAt.Format(time.RFC3339),
				}
				c.JSON(http.StatusOK, resJSON)
				return
			}
		}
		c.JSON(http.StatusOK, gin.H{
			"error": err.Error(),
		})
		return
	}
	if user.ID == uint(1) {
		c.JSON(http.StatusOK, gin.H{
			"error": "super user already exists, use cli to reset password",
		})
	}
}

func HandleMe(c *gin.Context) {
	u, err := db.GetUserByID(1)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"error": err.Error(),
		})
	}

	resJSON := User{
		false,
		int(u.ID),
		u.UpdatedAt.Format(time.RFC3339),
		u.Name,
		u.Token,
		u.CreatedAt.Format(time.RFC3339),
	}
	c.JSON(http.StatusOK, resJSON)
}

func HandleKeys(c *gin.Context) {
	keys, err := db.GetAllKeys()
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"error": err.Error(),
		})
	}

	c.JSON(http.StatusOK, keys)
}

func HandleUsers(c *gin.Context) {
	users, err := db.GetAllUsers()
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"error": err.Error(),
		})
	}

	c.JSON(http.StatusOK, users)
}

func HandleAddKey(c *gin.Context) {
	var body Key
	if err := c.BindJSON(&body); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	if err := db.AddKey(body.Key, body.Name); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	k, err := db.GetKeyrByName(body.Name)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, k)
}

func HandleDelKey(c *gin.Context) {
	id := to.Int(c.Param("id"))
	if id < 1 {
		c.JSON(http.StatusOK, gin.H{"error": "invalid key id"})
		return
	}
	if err := db.DeleteKey(uint(id)); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": "invalid key id"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"message": "ok"})
}

func HandleAddUser(c *gin.Context) {
	var body User
	if err := c.BindJSON(&body); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	// if len(body.Name) == 0 {
	// 	c.JSON(http.StatusOK, gin.H{"error": "invalid user name"})
	// 	return
	// }

	if err := db.AddUser(body.Name, uuid.NewString()); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	u, err := db.GetUserByName(body.Name)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, u)
}

func HandleDelUser(c *gin.Context) {
	id := to.Int(c.Param("id"))
	if id <= 1 {
		c.JSON(http.StatusOK, gin.H{"error": "invalid user id"})
		return
	}
	if err := db.DeleteUser(uint(id)); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "ok"})
}

func HandleResetUserToken(c *gin.Context) {
	id := to.Int(c.Param("id"))

	if err := db.UpdateUser(uint(id), uuid.NewString()); err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	u, err := db.GetUserByID(uint(id))
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, u)
}

func GenerateToken() string {
	token := uuid.New()
	return token.String()
}