package v1

import (
	"net/http"

	"github.com/gin-gonic/gin"

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

// InstallationConfigHandler handles InstallationConfig CRUD endpoints.
// Reference: Chatwoot app/controllers/api/v1/platform/installation_configs_controller.rb
// Note: These handlers are registered under /platform/api/v1/ namespace (super admin only)
type InstallationConfigHandler struct {
	svc *service.InstallationConfigService
}

// NewInstallationConfigHandler creates a new InstallationConfig handler with service injection.
func NewInstallationConfigHandler(svc *service.InstallationConfigService) *InstallationConfigHandler {
	return &InstallationConfigHandler{svc: svc}
}

// --- Platform-level InstallationConfig endpoints (super-admin only) ---
// Reference: Chatwoot routes — namespace :installation_configs under :platform_app

// List retrieves all installation configs, paginated.
// GET /platform/api/v1/installation_configs
func (h *InstallationConfigHandler) List(c *gin.Context) {
	page := pagination.Parse(c)
	configs, total, svcErr := h.svc.List(c.Request.Context(), page.Offset, page.PerPage)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OKWithMeta(c, configs, page.Page, page.PerPage, total)
}

// Get retrieves a single installation config by ID.
// GET /platform/api/v1/installation_configs/:id
func (h *InstallationConfigHandler) Get(c *gin.Context) {
	id, err := parseUintParam(c, "id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid id")
		return
	}

	cfg, svcErr := h.svc.Get(c.Request.Context(), id)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, cfg)
}

// Create creates a new installation config.
// POST /platform/api/v1/installation_configs
func (h *InstallationConfigHandler) Create(c *gin.Context) {
	var req service.CreateInstallationConfigRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, err.Error())
		return
	}

	cfg, svcErr := h.svc.Create(c.Request.Context(), &req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.Created(c, cfg)
}

// Update modifies an existing installation config.
// PUT /platform/api/v1/installation_configs/:id
func (h *InstallationConfigHandler) Update(c *gin.Context) {
	id, err := parseUintParam(c, "id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid id")
		return
	}

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

	cfg, svcErr := h.svc.Update(c.Request.Context(), id, &req)
	if svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.OK(c, cfg)
}

// Delete removes an installation config by ID.
// DELETE /platform/api/v1/installation_configs/:id
func (h *InstallationConfigHandler) Delete(c *gin.Context) {
	id, err := parseUintParam(c, "id")
	if err != nil {
		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrBadRequest, "invalid id")
		return
	}

	if svcErr := h.svc.Delete(c.Request.Context(), id); svcErr != nil {
		handleServiceError(c, svcErr)
		return
	}

	response.NoContent(c)
}