package handlers

import (
	"database/sql"
	"fmt"
	"net/http"

	"forge-mesh/internal/auth"
	"forge-mesh/internal/forge"
)

// DropperHandler serves the dropper URL and one-liner info to the operator.
type DropperHandler struct {
	DB           *sql.DB
	PublicKeyHex string
	FleetSecret  string
	Version      string
}

type DropperInfo struct {
	DropperURL  string `json:"dropper_url"`
	InstallURL  string `json:"install_url"`
	OneLiner    string `json:"one_liner"`
	FleetSecret string `json:"fleet_secret"`
	PublicKey   string `json:"public_key"`
	HasBuild    bool   `json:"has_build"`
	Version     string `json:"version"`
}

func deckURL(r *http.Request) string {
	scheme := "http"
	if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
		scheme = "https"
	}
	return fmt.Sprintf("%s://%s", scheme, r.Host)
}

// Info handles GET /api/v1/dropper — returns dropper link, one-liner, and build status.
func (h *DropperHandler) Info(w http.ResponseWriter, r *http.Request) {
	base := deckURL(r)
	installURL := base + "/install.sh"
	dropperURL := base + "/get"

	oneLiner := fmt.Sprintf(
		"FORGE_MESH_FLEET_SECRET=%s bash <(curl -fsSL %s)",
		h.FleetSecret, installURL,
	)

	// Check whether a public build exists so the UI can warn if not.
	_, err := forge.LatestPublic(h.DB, "linux", "amd64")
	hasBuild := err == nil

	auth.JSON(w, http.StatusOK, DropperInfo{
		DropperURL:  dropperURL,
		InstallURL:  installURL,
		OneLiner:    oneLiner,
		FleetSecret: h.FleetSecret,
		PublicKey:   h.PublicKeyHex,
		HasBuild:    hasBuild,
		Version:     h.Version,
	})
}