package v1

import (
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/gochat/gochat/internal/service"
	applogger "github.com/gochat/gochat/pkg/logger"
	"github.com/gochat/gochat/pkg/pagination"
	"github.com/gochat/gochat/pkg/response"
)

// PortalMemberHandler handles PortalMember CRUD endpoints.
type PortalMemberHandler struct {
	svc *service.PortalMemberService
}

// NewPortalMemberHandler creates a new PortalMemberHandler.
func NewPortalMemberHandler(svc *service.PortalMemberService) *PortalMemberHandler {
	return &PortalMemberHandler{svc: svc}
}

// Create adds a member to a portal.
// POST /api/v1/accounts/:account_id/portals/:portal_id/members
func (h *PortalMemberHandler) Create(c *gin.Context) {
	portalID, err := strconv.ParseUint(c.Param("portal_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid portal_id")
		return
	}

	var req service.CreatePortalMemberRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
		return
	}

	member, err := h.svc.Create(c.Request.Context(), uint(portalID), &req)
	if err != nil {
		applogger.L().Errorf("Create portal member: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to add portal member")
		return
	}

	response.Created(c, member)
}

// Get retrieves a portal member by ID.
// GET /api/v1/accounts/:account_id/portals/:portal_id/members/:member_id
func (h *PortalMemberHandler) Get(c *gin.Context) {
	memberID, err := strconv.ParseUint(c.Param("member_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid member_id")
		return
	}

	member, err := h.svc.GetByID(c.Request.Context(), uint(memberID))
	if err != nil {
		applogger.L().Errorf("Get portal member: %v", err)
		response.AbortWithStatusError(c, http.StatusNotFound, response.ErrNotFound, "portal member not found")
		return
	}

	response.OK(c, member)
}

// Update modifies a portal member's role.
// PUT /api/v1/accounts/:account_id/portals/:portal_id/members/:member_id
func (h *PortalMemberHandler) Update(c *gin.Context) {
	memberID, err := strconv.ParseUint(c.Param("member_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid member_id")
		return
	}

	var req service.UpdatePortalMemberRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
		return
	}

	member, err := h.svc.Update(c.Request.Context(), uint(memberID), &req)
	if err != nil {
		applogger.L().Errorf("Update portal member: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to update portal member")
		return
	}

	response.OK(c, member)
}

// Delete removes a portal member.
// DELETE /api/v1/accounts/:account_id/portals/:portal_id/members/:member_id
func (h *PortalMemberHandler) Delete(c *gin.Context) {
	memberID, err := strconv.ParseUint(c.Param("member_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid member_id")
		return
	}

	if err := h.svc.Delete(c.Request.Context(), uint(memberID)); err != nil {
		applogger.L().Errorf("Delete portal member: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to delete portal member")
		return
	}

	response.NoContent(c)
}

// List retrieves all members of a portal (paginated).
// GET /api/v1/accounts/:account_id/portals/:portal_id/members
func (h *PortalMemberHandler) List(c *gin.Context) {
	portalID, err := strconv.ParseUint(c.Param("portal_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid portal_id")
		return
	}

	pg := pagination.Parse(c)
	members, total, err := h.svc.ListByPortalID(c.Request.Context(), uint(portalID), pg.Offset, pg.PerPage)
	if err != nil {
		applogger.L().Errorf("List portal members: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to list portal members")
		return
	}

	response.OKWithMeta(c, members, pg.Page, pg.PerPage, total)
}