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"
)

// PortalHandler handles Portal CRUD endpoints.
type PortalHandler struct {
	svc *service.PortalService
}

// NewPortalHandler creates a new PortalHandler.
func NewPortalHandler(svc *service.PortalService) *PortalHandler {
	return &PortalHandler{svc: svc}
}

// Create creates a new portal.
// POST /api/v1/accounts/:account_id/portals
func (h *PortalHandler) Create(c *gin.Context) {
	accountID, err := strconv.ParseUint(c.Param("account_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	// Chatwoot: params.require(:portal) → {"portal": {...}}
	var wrapper struct {
		Portal service.CreatePortalRequest `json:"portal"`
	}
	if err := c.ShouldBindJSON(&wrapper); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
		return
	}
	req := wrapper.Portal

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

	response.Created(c, portal)
}

// Get retrieves a portal by ID.
// GET /api/v1/accounts/:account_id/portals/:portal_id
func (h *PortalHandler) Get(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
	}

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

	response.OK(c, portal)
}

// Update modifies an existing portal.
// PUT /api/v1/accounts/:account_id/portals/:portal_id
func (h *PortalHandler) Update(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
	}

	// Chatwoot: params.require(:portal) → {"portal": {...}}
	var wrapper struct {
		Portal service.UpdatePortalRequest `json:"portal"`
	}
	if err := c.ShouldBindJSON(&wrapper); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
		return
	}
	req := wrapper.Portal

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

	response.OK(c, portal)
}

// Delete soft-deletes a portal.
// DELETE /api/v1/accounts/:account_id/portals/:portal_id
func (h *PortalHandler) Delete(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
	}

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

	response.NoContent(c)
}

// List retrieves all portals for an account (paginated).
// GET /api/v1/accounts/:account_id/portals
func (h *PortalHandler) List(c *gin.Context) {
	accountID, err := strconv.ParseUint(c.Param("account_id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

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

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

// Archive sets archived=true on a portal.
// POST /api/v1/accounts/:account_id/portals/:portal_id/archive
func (h *PortalHandler) Archive(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
	}

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

	response.OK(c, portal)
}

// RemoveLogo clears the logo_url on a portal.
// DELETE /api/v1/accounts/:account_id/portals/:portal_id/logo
func (h *PortalHandler) RemoveLogo(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
	}

	portal, err := h.svc.RemoveLogo(c.Request.Context(), uint(portalID))
	if err != nil {
		applogger.L().Errorf("Remove portal logo: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to remove portal logo")
		return
	}

	response.OK(c, portal)
}

// SendInstructions sends CNAME configuration instructions to an email address.
// POST /api/v1/accounts/:account_id/portals/:portal_id/send_instructions
func (h *PortalHandler) SendInstructions(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.SendInstructionsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
		return
	}

	if err := h.svc.SendInstructions(c.Request.Context(), uint(portalID), &req); err != nil {
		applogger.L().Errorf("Send portal instructions: %v", err)
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, err.Error())
		return
	}

	response.NoContent(c)
}

// SSLStatus returns the SSL certificate status for a portal's custom domain.
// GET /api/v1/accounts/:account_id/portals/:portal_id/ssl_status
func (h *PortalHandler) SSLStatus(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
	}

	status, err := h.svc.SSLStatus(c.Request.Context(), uint(portalID))
	if err != nil {
		applogger.L().Errorf("Get SSL status: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, response.ErrInternal, "failed to get SSL status")
		return
	}

	response.OK(c, status)
}