package v1

import (
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/gochat/gochat/internal/service"
)

// ContactInboxHandler handles contact_inbox-specific API endpoints
// that are not nested under a single contact (e.g., filter by account).
// Reference: Chatwoot app/controllers/api/v1/contact_inboxes_controller.rb
type ContactInboxHandler struct {
	svc *service.ContactInboxService
}

// NewContactInboxHandler creates a new ContactInboxHandler.
func NewContactInboxHandler(svc *service.ContactInboxService) *ContactInboxHandler {
	return &ContactInboxHandler{svc: svc}
}

// Filter retrieves contact_inboxes by account with optional filters.
// GET /api/v1/accounts/:id/contact_inboxes/filter?inbox_id=...&contact_id=...&source_id=...&page=1&page_size=25
// Reference: Chatwoot contact_inboxes_controller#filter
func (h *ContactInboxHandler) Filter(c *gin.Context) {
	accountID, err := parseUintParam(c, "id")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid account id"})
		return
	}

	page := getPage(c)
	perPage := getPageSize(c)
	offset := (page - 1) * perPage

	// Optional filter params
	var inboxID, contactID *uint
	if v := c.Query("inbox_id"); v != "" {
		id, e := strconv.ParseUint(v, 10, 64)
		if e == nil {
			uid := uint(id)
			inboxID = &uid
		}
	}
	if v := c.Query("contact_id"); v != "" {
		id, e := strconv.ParseUint(v, 10, 64)
		if e == nil {
			uid := uint(id)
			contactID = &uid
		}
	}
	sourceID := c.Query("source_id")

	contactInboxes, total, svcErr := h.svc.FilterContactInboxes(
		c.Request.Context(), accountID, inboxID, contactID, sourceID, offset, perPage,
	)
	if svcErr != nil {
		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": "failed to filter contact inboxes"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"contact_inboxes": contactInboxes,
		"meta":            gin.H{"count": total, "page": page, "page_size": perPage},
	})
}