package handlers

import (
	"strings"

	"github.com/gin-gonic/gin"

	"git.netcell-it.de/projekte/edgeguard-native/internal/handlers/response"
	"git.netcell-it.de/projekte/edgeguard-native/internal/services/audit"
	"git.netcell-it.de/projekte/edgeguard-native/internal/services/clusterjoin"
	"git.netcell-it.de/projekte/edgeguard-native/internal/services/setup"
)

// SetupHandler exposes the first-run wizard endpoints. Both endpoints
// are mounted before SetupGate so they remain reachable while the API
// is in setup mode.
type SetupHandler struct {
	Store   *setup.Store
	Audit   *audit.Repo
	NodeID  string
	Version string
}

func NewSetupHandler(store *setup.Store) *SetupHandler {
	return &SetupHandler{Store: store}
}

// WithAudit injiziert Audit-Repo + Node-ID damit Mutationen (contact-emails)
// in audit_log landen. Optional — wenn Audit nil bleibt, läuft die
// Mutation, aber ohne Log-Eintrag.
func (h *SetupHandler) WithAudit(a *audit.Repo, nodeID string) *SetupHandler {
	h.Audit = a
	h.NodeID = nodeID
	return h
}

// WithVersion macht die laufende Version für auto-register verfügbar.
func (h *SetupHandler) WithVersion(v string) *SetupHandler {
	h.Version = v
	return h
}

func (h *SetupHandler) Register(rg *gin.RouterGroup) {
	g := rg.Group("/setup")
	g.GET("/status", h.Status)
	g.POST("/complete", h.Complete)
	g.POST("/complete-node", h.CompleteAsNode)
	g.POST("/join-cluster", h.JoinCluster)
}

// RegisterAuthed mountet die Endpoints die nach abgeschlossenem Setup
// den Admin-Modus brauchen — Aufrufer hat requireAuth schon dran.
func (h *SetupHandler) RegisterAuthed(rg *gin.RouterGroup) {
	g := rg.Group("/setup")
	g.POST("/contact-emails", h.SetContactEmails)
}

// Status returns just the public bits of the setup state: whether
// it's done and (if so) the configured admin_email + acme_email +
// fqdn. Never exposes the password hash.
func (h *SetupHandler) Status(c *gin.Context) {
	st, err := h.Store.Load()
	if err != nil {
		response.Internal(c, err)
		return
	}
	response.OK(c, gin.H{
		"completed":   st.Completed,
		"admin_email": st.AdminEmail,
		"acme_email":  st.ACMEEmail,
		"fqdn":        st.FQDN,
	})
}

// SetContactEmails: Admin-only Update der zwei E-Mail-Felder.
// Sessions bleiben aktiv (Cookie referenziert den alten Actor); auf
// nächstem Login zählt der neue Wert.
func (h *SetupHandler) SetContactEmails(c *gin.Context) {
	var req struct {
		AdminEmail string `json:"admin_email" binding:"required,email"`
		ACMEEmail  string `json:"acme_email"  binding:"required,email"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err)
		return
	}
	if err := h.Store.SetContactEmails(req.AdminEmail, req.ACMEEmail); err != nil {
		response.BadRequest(c, err)
		return
	}
	st, err := h.Store.Load()
	if err != nil {
		response.Internal(c, err)
		return
	}
	if h.Audit != nil {
		_ = h.Audit.Log(c.Request.Context(), actorOf(c), "setup.contact_emails",
			st.AdminEmail, gin.H{
				"admin_email": st.AdminEmail,
				"acme_email":  st.ACMEEmail,
			}, h.NodeID)
	}
	response.OK(c, gin.H{
		"admin_email": st.AdminEmail,
		"acme_email":  st.ACMEEmail,
	})
}

func (h *SetupHandler) Complete(c *gin.Context) {
	var req setup.Request
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err)
		return
	}
	st, err := h.Store.Complete(req)
	if err != nil {
		response.BadRequest(c, err)
		return
	}
	response.OK(c, gin.H{
		"completed":   st.Completed,
		"admin_email": st.AdminEmail,
		"fqdn":        st.FQDN,
	})
}

func (h *SetupHandler) CompleteAsNode(c *gin.Context) {
	var req setup.NodeRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, err)
		return
	}
	st, err := h.Store.CompleteAsNode(req)
	if err != nil {
		response.BadRequest(c, err)
		return
	}
	response.OK(c, gin.H{
		"completed":       st.Completed,
		"is_cluster_node": st.IsClusterNode,
		"fqdn":            st.FQDN,
	})
}

// JoinCluster performs the full cluster-join flow from the setup wizard:
// fetches certs from the primary, writes them to disk, then marks setup
// as completed. No CLI required.
func (h *SetupHandler) JoinCluster(c *gin.Context) {
	var body struct {
		FQDN        string `json:"fqdn"         binding:"required"`
		ACMEEmail   string `json:"acme_email"   binding:"required,email"`
		PrimaryFQDN string `json:"primary_fqdn" binding:"required"`
		Token       string `json:"token"        binding:"required"`
		Insecure    bool   `json:"insecure"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.BadRequest(c, err)
		return
	}

	fqdn := strings.ToLower(strings.TrimSpace(body.FQDN))

	if err := clusterjoin.Join(clusterjoin.Request{
		PrimaryFQDN: body.PrimaryFQDN,
		Token:       strings.TrimSpace(body.Token),
		CommonName:  fqdn,
		Insecure:    body.Insecure,
		Force:       true, // bootstrap self-signed cert must be replaced
		Version:     h.Version,
		NodeID:      h.NodeID,
	}); err != nil {
		response.BadRequest(c, err)
		return
	}

	st, err := h.Store.CompleteAsNode(setup.NodeRequest{
		FQDN:      fqdn,
		ACMEEmail: body.ACMEEmail,
	})
	if err != nil {
		response.Internal(c, err)
		return
	}
	response.OK(c, gin.H{
		"completed":       st.Completed,
		"is_cluster_node": st.IsClusterNode,
		"fqdn":            st.FQDN,
	})
}