package v1

import (
	"net/http"

	"github.com/gin-gonic/gin"

	"github.com/gochat/gochat/internal/service"
	"github.com/gochat/gochat/pkg/response"
)

// InboxCsatTemplateHandler handles CSAT template endpoints for inboxes.
// Reference: Chatwoot app/controllers/api/v1/accounts/inboxes/inbox_csat_templates_controller.rb
// CSAT template is a singular resource per inbox: show, create, and analyze actions.
type InboxCsatTemplateHandler struct {
	svc *service.CsatTemplateService
}

// NewInboxCsatTemplateHandler creates a new InboxCsatTemplateHandler.
func NewInboxCsatTemplateHandler(svc *service.CsatTemplateService) *InboxCsatTemplateHandler {
	return &InboxCsatTemplateHandler{svc: svc}
}

// Show retrieves the CSAT template status for an inbox.
// GET /api/v1/accounts/:account_id/inboxes/:inbox_id/csat_template
// If no template exists, returns an empty object (Chatwoot returns nil in this case).
func (h *InboxCsatTemplateHandler) Show(c *gin.Context) {
	inboxID, err := parseUintParam(c, "inbox_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid inbox_id")
		return
	}

	template, svcErr := h.svc.ShowTemplateStatus(c.Request.Context(), inboxID)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	// If no template exists for this inbox, return empty object (Chatwoot pattern)
	if template == nil {
		response.OK(c, gin.H{})
		return
	}
	response.OK(c, template)
}

// Create creates or updates a CSAT template for an inbox.
// POST /api/v1/accounts/:account_id/inboxes/:inbox_id/csat_template
// Body: { "message": "..." }
func (h *InboxCsatTemplateHandler) Create(c *gin.Context) {
	inboxID, err := parseUintParam(c, "inbox_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid inbox_id")
		return
	}

	var req service.CreateCsatTemplateRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid request body")
		return
	}

	template, svcErr := h.svc.CreateTemplate(c.Request.Context(), inboxID, req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, template)
}

// Analyze analyzes a CSAT template message for quality.
// POST /api/v1/accounts/:account_id/inboxes/:inbox_id/csat_template/analyze
// Body: { "message": "..." }
func (h *InboxCsatTemplateHandler) Analyze(c *gin.Context) {
	inboxID, err := parseUintParam(c, "inbox_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid inbox_id")
		return
	}

	var req service.AnalyzeCsatTemplateRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid request body")
		return
	}

	result, svcErr := h.svc.AnalyzeTemplate(c.Request.Context(), inboxID, req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, result)
}