package v1

import (
	"net/http"

	"github.com/gin-gonic/gin"

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

// SlackIntegrationHandler handles Slack integration endpoints.
// Reference: Chatwoot Integrations::SlackController
type SlackIntegrationHandler struct {
	svc *service.SlackIntegrationService
}

// NewSlackIntegrationHandler creates a new SlackIntegrationHandler.
func NewSlackIntegrationHandler(svc *service.SlackIntegrationService) *SlackIntegrationHandler {
	return &SlackIntegrationHandler{svc: svc}
}

// Create creates a Slack integration for an account.
// POST /api/v1/accounts/:account_id/integrations/slack
func (h *SlackIntegrationHandler) Create(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

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

	hook, svcErr := h.svc.Create(c.Request.Context(), accountID, req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}
	response.OK(c, hook)
}

// Update updates a Slack integration for an account.
// PATCH /api/v1/accounts/:account_id/integrations/slack
func (h *SlackIntegrationHandler) Update(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

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

	hook, svcErr := h.svc.Update(c.Request.Context(), accountID, req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}
	response.OK(c, hook)
}

// Delete removes a Slack integration for an account.
// DELETE /api/v1/accounts/:account_id/integrations/slack
func (h *SlackIntegrationHandler) Delete(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	if svcErr := h.svc.Delete(c.Request.Context(), accountID); svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}
	response.OK(c, gin.H{"message": "Slack integration deleted"})
}

// ListAllChannels lists available Slack channels.
// GET /api/v1/accounts/:account_id/integrations/slack/list_all_channels
func (h *SlackIntegrationHandler) ListAllChannels(c *gin.Context) {
	accountID, err := parseUintParam(c, "account_id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid account_id")
		return
	}

	channels, svcErr := h.svc.ListAllChannels(c.Request.Context(), accountID)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}
	response.OK(c, channels)
}

// RegisterSlackIntegrationRoutes registers Slack integration routes.
func RegisterSlackIntegrationRoutes(g *gin.RouterGroup, h *SlackIntegrationHandler) {
	slack := g.Group("/slack")
	{
		slack.POST("/", h.Create)
		slack.PATCH("/", h.Update)
		slack.DELETE("/", h.Delete)
		slack.GET("/list_all_channels", h.ListAllChannels)
	}
}