package api

import (
	"errors"
	"io"
	"net/http"

	"github.com/gin-gonic/gin"
)

// getPublicGarden serves the read-only /full payload for a garden addressed by a
// public share token. It sits OUTSIDE requireAuth — the token itself is the
// capability — so a logged-out visitor can open a shared link without ever being
// bounced to /login or the OIDC flow. An unknown or disabled token is a 404.
func (h *handlers) getPublicGarden(c *gin.Context) {
	full, err := h.svc.PublicGarden(c.Request.Context(), c.Param("token"))
	if err != nil {
		writeServiceError(c, err)
		return
	}
	// The token is a capability in the URL: keep the response out of any shared
	// proxy cache, and always serve the live garden (the owner may have edited or
	// revoked it since the last view).
	c.Header("Cache-Control", "no-store")
	c.JSON(http.StatusOK, full)
}

// getShareLink reports the garden's public-link state (and, to the owner, the
// current token) so the share dialog can show/copy the URL. Owner only.
func (h *handlers) getShareLink(c *gin.Context) {
	id, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	link, err := h.svc.GetPublicShareLink(c.Request.Context(), mustActor(c).ID, id)
	if err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusOK, link)
}

// createShareLink enables the public link (idempotent) or, with {"rotate":true},
// issues a fresh token that invalidates the previous URL. Owner only. The body is
// optional — a missing/malformed one just means enable-without-rotate.
func (h *handlers) createShareLink(c *gin.Context) {
	id, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	var req struct {
		Rotate bool `json:"rotate"`
	}
	// The body is optional (an empty body means enable-without-rotate), but a
	// present-yet-malformed body is a client error, not a silent enable.
	if err := c.ShouldBindJSON(&req); err != nil && !errors.Is(err, io.EOF) {
		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "invalid request body")
		return
	}
	link, err := h.svc.EnablePublicShareLink(c.Request.Context(), mustActor(c).ID, id, req.Rotate)
	if err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusOK, link)
}

// deleteShareLink disables the public link. Owner only; idempotent.
func (h *handlers) deleteShareLink(c *gin.Context) {
	id, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	if err := h.svc.DisablePublicShareLink(c.Request.Context(), mustActor(c).ID, id); err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"enabled": false})
}