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/response"
)

// ConversationInsightHandler handles Captain conversation analysis endpoints.
// Reference: M12 PRD §Captain AI — Participant Analysis, Action Items, Label Suggestion
type ConversationInsightHandler struct {
	svc *service.ConversationInsightService
}

// NewConversationInsightHandler creates a new ConversationInsightHandler.
func NewConversationInsightHandler(svc *service.ConversationInsightService) *ConversationInsightHandler {
	return &ConversationInsightHandler{svc: svc}
}

// AnalyzeParticipants analyzes participants in a conversation.
// POST /api/v1/accounts/:account_id/captain/insights/participants
func (h *ConversationInsightHandler) AnalyzeParticipants(c *gin.Context) {
	accountID, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, "invalid_account_id", "Invalid account ID")
		return
	}

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

	result, err := h.svc.AnalyzeParticipants(c.Request.Context(), uint(accountID), &req)
	if err != nil {
		applogger.L().Errorf("ConversationInsightHandler.AnalyzeParticipants failed: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, "analysis_failed", "Failed to analyze participants")
		return
	}

	response.OK(c, result)
}

// ExtractActionItems extracts action items from a conversation.
// POST /api/v1/accounts/:account_id/captain/insights/action_items
func (h *ConversationInsightHandler) ExtractActionItems(c *gin.Context) {
	accountID, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, "invalid_account_id", "Invalid account ID")
		return
	}

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

	result, err := h.svc.ExtractActionItems(c.Request.Context(), uint(accountID), &req)
	if err != nil {
		applogger.L().Errorf("ConversationInsightHandler.ExtractActionItems failed: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, "action_items_failed", "Failed to extract action items")
		return
	}

	response.OK(c, result)
}

// SuggestLabels suggests labels and priority for a conversation.
// POST /api/v1/accounts/:account_id/captain/insights/label_suggestion
func (h *ConversationInsightHandler) SuggestLabels(c *gin.Context) {
	accountID, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, "invalid_account_id", "Invalid account ID")
		return
	}

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

	result, err := h.svc.SuggestLabels(c.Request.Context(), uint(accountID), &req)
	if err != nil {
		applogger.L().Errorf("ConversationInsightHandler.SuggestLabels failed: %v", err)
		response.AbortWithStatusError(c, http.StatusInternalServerError, "label_suggestion_failed", "Failed to suggest labels")
		return
	}

	response.OK(c, result)
}