package api

import (
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/wormhole/wormhole/internal/auth"
	"github.com/wormhole/wormhole/internal/forwardplugin"
	"github.com/wormhole/wormhole/internal/store"
)

func (s *Server) listDomainForwards(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	p := pageParams(c)
	items, total, err := s.store.ListDomainForwardsPaged(p)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"items": items, "total": total})
}

func (s *Server) createDomainForward(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	var req store.DomainForward
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "bad request"})
		return
	}
	if err := store.ValidateDomainForward(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	if err := s.store.RouteConflict(req.SourceHost, req.SourceLocation, 0, 0); err != nil {
		c.JSON(http.StatusConflict, gin.H{"error": err.Error()})
		return
	}
	if err := s.store.CreateDomainForward(&req); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	s.cache.UpsertDomainForward(&req)
	c.JSON(http.StatusOK, req)
}

func (s *Server) updateDomainForward(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	existing, err := s.store.GetDomainForwardByID(uint(id))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	var req store.DomainForward
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "bad request"})
		return
	}
	req.ID = existing.ID
	if req.Socks5Pass == "" {
		req.Socks5Pass = existing.Socks5Pass
	}
	if req.HTTPProxyPass == "" {
		req.HTTPProxyPass = existing.HTTPProxyPass
	}
	if err := store.ValidateDomainForward(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	if err := s.store.RouteConflict(req.SourceHost, req.SourceLocation, uint(id), 0); err != nil {
		c.JSON(http.StatusConflict, gin.H{"error": err.Error()})
		return
	}
	if err := s.store.UpdateDomainForward(&req); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	forwardplugin.InvalidateForwardCache(uint(id))
	s.cache.UpsertDomainForward(&req)
	c.JSON(http.StatusOK, req)
}

func (s *Server) deleteDomainForward(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if _, err := s.store.GetDomainForwardByID(uint(id)); err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	if err := s.store.DeleteDomainForward(uint(id)); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	forwardplugin.InvalidateForwardCache(uint(id))
	s.cache.DeleteDomainForward(uint(id))
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (s *Server) pauseDomainForward(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	existing, err := s.store.GetDomainForwardByID(uint(id))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	existing.Status = false
	_ = s.store.UpdateDomainForward(existing)
	s.cache.UpsertDomainForward(existing)
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

func (s *Server) resumeDomainForward(c *gin.Context) {
	if !auth.IsAdmin(getClaims(c).Role) {
		c.JSON(http.StatusForbidden, gin.H{"error": "admin only"})
		return
	}
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	existing, err := s.store.GetDomainForwardByID(uint(id))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
		return
	}
	existing.Status = true
	_ = s.store.UpdateDomainForward(existing)
	s.cache.UpsertDomainForward(existing)
	c.JSON(http.StatusOK, gin.H{"ok": true})
}