/*
 * Copyright (C) 2024 Jonni Liljamo <jonni@liljamo.com>
 *
 * This file is licensed under AGPL-3.0-or-later, see NOTICE and LICENSE for
 * more information.
 */

package handlers

import (
	"net/http"
	"regexp"
	"strings"

	"git.src.quest/~liljamo/felu/internal/db"
	"git.src.quest/~liljamo/felu/internal/util"
	"github.com/gin-gonic/gin"
)

type postDomainData struct {
	Domain  string `form:"domain"`
	ARecord string `form:"a_record"`
}

// PostDomain returns a gin handler
func PostDomain() gin.HandlerFunc {
	return func(c *gin.Context) {
		data := &postDomainData{}
		if err := c.Bind(data); err != nil {
			c.String(http.StatusBadRequest, "Could not bind domain data")
			c.Abort()
			return
		}

		if data.Domain == "" {
			c.String(http.StatusBadRequest, "Domain can't be empty")
			c.Abort()
			return
		}
		if strings.Contains(data.Domain, ".") {
			c.String(http.StatusBadRequest, "Domain can't contain full stops")
			c.Abort()
			return
		}
		// NOTE: I doubt doing a little regex here will matter, just the easiest for now.
		if !regexp.MustCompile(`^[A-Za-z0-9]*$`).MatchString(data.Domain) {
			c.String(http.StatusBadRequest, "Domain contains invalid chars")
			c.Abort()
			return
		}
		if err := util.CheckARecord(data.ARecord); err != nil {
			c.String(http.StatusBadRequest, err.Error())
			c.Abort()
			return
		}

		userID, exists := c.Get("user_id")
		if !exists {
			c.String(http.StatusInternalServerError, "This should not be possible, but don't quote me on that")
			c.Abort()
			return
		}

		err := db.CreateDomain(data.Domain, data.ARecord, userID.(string))
		if err != nil {
			// FIXME: Handle better
			c.String(http.StatusInternalServerError, "Something went wrong while creating a new domain")
			c.Abort()
			return
		}

		c.Header("HX-Trigger", "update-domain-list")
	}
}

// PatchDomain returns a gin handler
func PatchDomain() gin.HandlerFunc {
	return func(c *gin.Context) {
		userID, exists := c.Get("user_id")
		if !exists {
			c.String(http.StatusInternalServerError, "This should not be possible, but don't quote me on that")
			c.Abort()
			return
		}

		id := c.Param("id")

		aRecord := c.PostForm("a_record")
		if aRecord != "" {
			if err := util.CheckARecord(aRecord); err != nil {
				c.String(http.StatusBadRequest, err.Error())
				c.Abort()
				return
			}
			err := db.UpdateDomainARecordManual(id, userID.(string), aRecord)
			if err != nil {
				// FIXME: Handle better
				c.String(http.StatusInternalServerError, "Something went wrong while updating the a record")
				c.Abort()
				return
			}
		}

		c.Header("HX-Trigger", "update-domain-list")
	}
}

// DeleteDomain returns a gin handler
func DeleteDomain() gin.HandlerFunc {
	return func(c *gin.Context) {
		id := c.Param("id")

		userID, exists := c.Get("user_id")
		if !exists {
			c.String(http.StatusInternalServerError, "This should not be possible, but don't quote me on that")
			c.Abort()
			return
		}

		err := db.DeleteDomain(id, userID.(string))
		if err != nil {
			// FIXME: Handle better
			c.String(http.StatusInternalServerError, "Something went wrong while deleting the domain")
			c.Abort()
			return
		}

		c.Header("HX-Trigger", "update-domain-list")
	}
}

// RefreshDomainAPIKey returns a gin handler
func RefreshDomainAPIKey() gin.HandlerFunc {
	return func(c *gin.Context) {
		id := c.Param("id")

		userID, exists := c.Get("user_id")
		if !exists {
			c.String(http.StatusInternalServerError, "This should not be possible, but don't quote me on that")
			c.Abort()
			return
		}

		err := db.RefreshDomainAPIKey(id, userID.(string))
		if err != nil {
			// FIXME: Handle better
			c.String(http.StatusInternalServerError, "Something went wrong while updating the api key")
			c.Abort()
			return
		}

		c.Header("HX-Trigger", "update-domain-list")
	}
}

// RefreshDomainTsigKey returns a gin handler
func RefreshDomainTsigKey() gin.HandlerFunc {
	return func(c *gin.Context) {
		id := c.Param("id")

		userID, exists := c.Get("user_id")
		if !exists {
			c.String(http.StatusInternalServerError, "This should not be possible, but don't quote me on that")
			c.Abort()
			return
		}

		err := db.RefreshDomainTsigKey(id, userID.(string))
		if err != nil {
			// FIXME: Handle better
			c.String(http.StatusInternalServerError, "Something went wrong while updating the tsig key")
			c.Abort()
			return
		}

		c.Header("HX-Trigger", "update-domain-list")
	}
}