package api

import (
	"net/http"

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

// shareCreateRequest is the body for POST /gardens/:id/shares: the recipient's
// exact account email and the role to grant (viewer|editor).
type shareCreateRequest struct {
	Email string `json:"email" binding:"required"`
	Role  string `json:"role" binding:"required"`
}

// shareUpdateRequest is the body for PATCH /gardens/:id/shares/:userId.
type shareUpdateRequest struct {
	Role string `json:"role" binding:"required"`
}

func (h *handlers) listShares(c *gin.Context) {
	gardenID, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	shares, err := h.svc.ListShares(c.Request.Context(), mustActor(c).ID, gardenID)
	if err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusOK, shares)
}

func (h *handlers) addShare(c *gin.Context) {
	gardenID, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	var req shareCreateRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "an email and a role are required")
		return
	}
	sh, err := h.svc.AddShare(c.Request.Context(), mustActor(c).ID, gardenID, req.Email, req.Role)
	if err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusCreated, sh)
}

func (h *handlers) updateShare(c *gin.Context) {
	gardenID, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	userID, ok := parseIDParam(c, "userId")
	if !ok {
		return
	}
	var req shareUpdateRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		writeAPIError(c, http.StatusBadRequest, "INVALID_INPUT", "a role is required")
		return
	}
	sh, err := h.svc.UpdateShareRole(c.Request.Context(), mustActor(c).ID, gardenID, userID, req.Role)
	if err != nil {
		writeServiceError(c, err)
		return
	}
	c.JSON(http.StatusOK, sh)
}

func (h *handlers) removeShare(c *gin.Context) {
	gardenID, ok := parseIDParam(c, "id")
	if !ok {
		return
	}
	userID, ok := parseIDParam(c, "userId")
	if !ok {
		return
	}
	if err := h.svc.RemoveShare(c.Request.Context(), mustActor(c).ID, gardenID, userID); err != nil {
		writeServiceError(c, err)
		return
	}
	c.Status(http.StatusNoContent)
}