resource.go

package enable

import (
	"context"
	"errors"
	"fmt"
	"net/http"

	"github.com/hashicorp/terraform-plugin-framework/types"

	"github.com/hashicorp/terraform-plugin-framework/resource"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
	"github.com/hashicorp/terraform-plugin-framework/schema/validator"
	"github.com/hashicorp/terraform-plugin-log/tflog"
	"github.com/stackitcloud/stackit-sdk-go/core/oapierror"
	serverbackup "github.com/stackitcloud/stackit-sdk-go/services/serverbackup/v2api"

	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/conversion"
	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core"
	serverBackupUtils "github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/serverbackup/utils"
	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils"
	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate"
)

// Ensure the implementation satisfies the expected interfaces.
var (
	_ resource.Resource              = &serverBackupEnableResource{}
	_ resource.ResourceWithConfigure = &serverBackupEnableResource{}
)

type Model struct {
	Id             types.String `tfsdk:"id"` // needed by TF
	ProjectId      types.String `tfsdk:"project_id"`
	ServerId       types.String `tfsdk:"server_id"`
	BackupPolicyId types.String `tfsdk:"backup_policy_id"`
	Enabled        types.Bool   `tfsdk:"enabled"`
	Region         types.String `tfsdk:"region"`
}

// NewServerBackupEnableResource is a helper function to simplify the provider implementation.
func NewServerBackupEnableResource() resource.Resource {
	return &serverBackupEnableResource{}
}

// serverBackupEnableResource is the resource implementation.
type serverBackupEnableResource struct {
	client       *serverbackup.APIClient
	providerData core.ProviderData
}

// ModifyPlan implements resource.ResourceWithModifyPlan.
// Use the modifier to set the effective region in the current plan.
func (r *serverBackupEnableResource) ModifyPlan(ctx context.Context, req resource.ModifyPlanRequest, resp *resource.ModifyPlanResponse) { // nolint:gocritic // function signature required by Terraform
	var configModel Model
	// skip initial empty configuration to avoid follow-up errors
	if req.Config.Raw.IsNull() {
		return
	}
	resp.Diagnostics.Append(req.Config.Get(ctx, &configModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

	var planModel Model
	resp.Diagnostics.Append(req.Plan.Get(ctx, &planModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

	utils.AdaptRegion(ctx, configModel.Region, &planModel.Region, r.providerData.GetRegion(), resp)
	if resp.Diagnostics.HasError() {
		return
	}

	resp.Diagnostics.Append(resp.Plan.Set(ctx, planModel)...)
	if resp.Diagnostics.HasError() {
		return
	}
}

// Metadata returns the resource type name.
func (r *serverBackupEnableResource) Metadata(_ context.Context, req resource.MetadataRequest, resp *resource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_server_backup_enable"
}

// Configure adds the provider configured client to the resource.
func (r *serverBackupEnableResource) Configure(ctx context.Context, req resource.ConfigureRequest, resp *resource.ConfigureResponse) {
	var ok bool
	r.providerData, ok = conversion.ParseProviderData(ctx, req.ProviderData, &resp.Diagnostics)
	if !ok {
		return
	}

	apiClient := serverBackupUtils.ConfigureClient(ctx, &r.providerData, &resp.Diagnostics)
	if resp.Diagnostics.HasError() {
		return
	}
	r.client = apiClient
	tflog.Info(ctx, "Server backup client configured")
}

// Schema defines the schema for the resource.
func (r *serverBackupEnableResource) Schema(_ context.Context, _ resource.SchemaRequest, resp *resource.SchemaResponse) {
	descriptions := map[string]string{
		"main":             "Server backup enable resource schema. Must have a `region` specified in the provider configuration. Always use only one enable resource per server.",
		"id":               "Terraform's internal resource identifier. It is structured as \"`project_id`,`server_id`,`region`\".",
		"project_id":       "STACKIT Project ID to which the server backup enable is associated.",
		"server_id":        "Server ID to which the server backup enable is associated.",
		"region":           "The resource region. If not defined, the provider region is used.",
		"enabled":          "Set to true if the service is enabled.",
		"backup_policy_id": "The backup policy ID.",
	}

	resp.Schema = schema.Schema{
		Description: descriptions["main"],
		Attributes: map[string]schema.Attribute{
			"id": schema.StringAttribute{
				Description: descriptions["id"],
				Computed:    true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.UseStateForUnknown(),
				},
			},
			"project_id": schema.StringAttribute{
				Description: descriptions["project_id"],
				Required:    true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
				Validators: []validator.String{
					validate.UUID(),
					validate.NoSeparator(),
				},
			},
			"server_id": schema.StringAttribute{
				Description: descriptions["server_id"],
				Required:    true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
				Validators: []validator.String{
					validate.UUID(),
					validate.NoSeparator(),
				},
			},
			"backup_policy_id": schema.StringAttribute{
				Description: descriptions["backup_policy_id"],
				Optional:    true,
				Validators: []validator.String{
					validate.UUID(),
					validate.NoSeparator(),
				},
			},
			"enabled": schema.BoolAttribute{
				Description: descriptions["enabled"],
				Computed:    true,
			},
			"region": schema.StringAttribute{
				Optional: true,
				// must be computed to allow for storing the override value from the provider
				Computed:    true,
				Description: descriptions["region"],
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
		},
	}
}

// Create creates the resource and sets the initial Terraform state.
func (r *serverBackupEnableResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) { // nolint:gocritic // function signature required by Terraform
	var model Model
	diags := req.Plan.Get(ctx, &model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}

	ctx = core.InitProviderContext(ctx)

	projectId := model.ProjectId.ValueString()
	serverId := model.ServerId.ValueString()
	region := r.providerData.GetRegionWithOverride(model.Region)

	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "server_id", serverId)
	ctx = tflog.SetField(ctx, "region", region)

	err := r.client.DefaultAPI.EnableServiceResource(ctx, projectId, serverId, region).EnableServiceResourcePayload(serverbackup.EnableServiceResourcePayload{}).Execute()
	if err != nil {
		var oapiErr *oapierror.GenericOpenAPIError
		ok := errors.As(err, &oapiErr)

		if !(ok && oapiErr.StatusCode == http.StatusConflict) {
			core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating server backup enable", fmt.Sprintf("Calling API: %v", err))
			return
		}
		tflog.Info(ctx, "Server backup is already enabled for this server. Please check duplicate resources.")
	}

	serviceResp, err := r.client.DefaultAPI.GetServiceResource(ctx, projectId, serverId, region).Execute()
	if err != nil {
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading server backup enable", fmt.Sprintf("Calling API: %v", err))
		return
	}

	ctx = core.LogResponse(ctx)

	// Map response body to schema
	err = mapFields(serviceResp, &model, region)
	if err != nil {
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading server backup enable", fmt.Sprintf("Processing API payload: %v", err))
		return
	}

	diags = resp.State.Set(ctx, model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}

	tflog.Info(ctx, "Server backup enable created")
}

// Read refreshes the Terraform state with the latest data.
func (r *serverBackupEnableResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) { // nolint:gocritic // function signature required by Terraform
	var model Model
	diags := req.State.Get(ctx, &model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}

	projectId := model.ProjectId.ValueString()
	serverId := model.ServerId.ValueString()
	region := r.providerData.GetRegionWithOverride(model.Region)

	ctx = core.InitProviderContext(ctx)
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "server_id", serverId)
	ctx = tflog.SetField(ctx, "region", region)

	serviceResp, err := r.client.DefaultAPI.GetServiceResource(ctx, projectId, serverId, region).Execute()
	if err != nil {
		oapiErr, ok := err.(*oapierror.GenericOpenAPIError) //nolint:errorlint //complaining that error.As should be used to catch wrapped errors, but this error should not be wrapped
		if ok && oapiErr.StatusCode == http.StatusNotFound {
			resp.State.RemoveResource(ctx)
			return
		}
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading server backup enable", fmt.Sprintf("Calling API: %v", err))
		return
	}

	ctx = core.LogResponse(ctx)

	// Map response body to schema
	err = mapFields(serviceResp, &model, region)
	if err != nil {
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading server backup enable", fmt.Sprintf("Processing API payload: %v", err))
		return
	}

	// Set refreshed state
	diags = resp.State.Set(ctx, model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}
	tflog.Info(ctx, "Server backup enable read")
}

// Update updates the resource and sets the updated Terraform state on success.
func (r *serverBackupEnableResource) Update(ctx context.Context, _ resource.UpdateRequest, resp *resource.UpdateResponse) { // nolint:gocritic // function signature required by Terraform
	// Update shouldn't be called
	core.LogAndAddError(ctx, &resp.Diagnostics, "Error updating server backup enable", "Server backup enable can't be updated")
}

// Delete deletes the resource and removes the Terraform state on success.
func (r *serverBackupEnableResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) { // nolint:gocritic // function signature required by Terraform
	var model Model
	diags := req.State.Get(ctx, &model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}

	ctx = core.InitProviderContext(ctx)

	projectId := model.ProjectId.ValueString()
	serverId := model.ServerId.ValueString()
	region := model.Region.ValueString()

	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "server_id", serverId)
	ctx = tflog.SetField(ctx, "region", region)

	err := r.client.DefaultAPI.DisableServiceResource(ctx, projectId, serverId, region).Execute()
	if err != nil {
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error deleting server backup enable", fmt.Sprintf("Calling API: %v", err))
		return
	}

	ctx = core.LogResponse(ctx)
	tflog.Info(ctx, "Server backup enable deleted")
}

func mapFields(serviceResp *serverbackup.GetBackupServiceResponse, model *Model, region string) error {
	if serviceResp == nil {
		return fmt.Errorf("response input is nil")
	}
	if model == nil {
		return fmt.Errorf("model input is nil")
	}

	model.Id = utils.BuildInternalTerraformId(model.ProjectId.ValueString(), model.ServerId.ValueString(), region)
	model.Region = types.StringValue(region)
	model.Enabled = types.BoolPointerValue(serviceResp.Enabled)

	return nil
}