fix: fix sqlserverflexalpha (#61)

## Description

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At least please give us some description what you are trying to achieve and why your change is needed. -->

relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Reviewed-on: #61
Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Co-committed-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>

stackit/internal/services/sqlserverflexalpha/flavors/datasource.go

@@ -2,30 +2,39 @@ package sqlserverflexalpha
 
 import (
 	"context"
+	"fmt"
+	"net/http"
 
 	"github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/types"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
+	"github.com/stackitcloud/stackit-sdk-go/core/config"
 
-	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/pkg_gen/sqlserverflexalpha"
 	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/conversion"
 	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/core"
-	sqlserverflexUtils "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexalpha/utils"
+	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/utils"
+
+	sqlserverflexalphaPkg "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/pkg_gen/sqlserverflexalpha"
 
 	sqlserverflexalphaGen "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexalpha/flavors/datasources_gen"
 )
 
-// dataSourceModel maps the data source schema data.
-type dataSourceModel = sqlserverflexalphaGen.FlavorsModel
-
 var _ datasource.DataSource = (*flavorsDataSource)(nil)
 
-// TODO: Use NewFlavorsDataSource when datasource is implemented
+const errorPrefix = "[sqlserverflexalpha - Flavors]"
+
 func NewFlavorsDataSource() datasource.DataSource {
 	return &flavorsDataSource{}
 }
 
+type dataSourceModel struct {
+	sqlserverflexalphaGen.FlavorsModel
+	TerraformId types.String `tfsdk:"id"`
+}
+
 type flavorsDataSource struct {
-	client       *sqlserverflexalpha.APIClient
+	client       *sqlserverflexalphaPkg.APIClient
 	providerData core.ProviderData
 }
 
@@ -39,6 +48,11 @@ func (d *flavorsDataSource) Metadata(
 
 func (d *flavorsDataSource) Schema(ctx context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
 	resp.Schema = sqlserverflexalphaGen.FlavorsDataSourceSchema(ctx)
+	resp.Schema.Attributes["id"] = schema.StringAttribute{
+		Computed:            true,
+		Description:         "The terraform internal identifier.",
+		MarkdownDescription: "The terraform internal identifier.",
+	}
 }
 
 // Configure adds the provider configured client to the data source.
@@ -53,12 +67,34 @@ func (d *flavorsDataSource) Configure(
 		return
 	}
 
-	apiClient := sqlserverflexUtils.ConfigureClient(ctx, &d.providerData, &resp.Diagnostics)
-	if resp.Diagnostics.HasError() {
+	apiClientConfigOptions := []config.ConfigurationOption{
+		config.WithCustomAuth(d.providerData.RoundTripper),
+		utils.UserAgentConfigOption(d.providerData.Version),
+	}
+	if d.providerData.SQLServerFlexCustomEndpoint != "" {
+		apiClientConfigOptions = append(
+			apiClientConfigOptions,
+			config.WithEndpoint(d.providerData.SQLServerFlexCustomEndpoint),
+		)
+	} else {
+		apiClientConfigOptions = append(
+			apiClientConfigOptions,
+			config.WithRegion(d.providerData.GetRegion()),
+		)
+	}
+	apiClient, err := sqlserverflexalphaPkg.NewAPIClient(apiClientConfigOptions...)
+	if err != nil {
+		resp.Diagnostics.AddError(
+			"Error configuring API client",
+			fmt.Sprintf(
+				"Configuring client: %v. This is an error related to the provider configuration, not to the resource configuration",
+				err,
+			),
+		)
 		return
 	}
 	d.client = apiClient
-	tflog.Info(ctx, "SQL SERVER Flex flavors client configured")
+	tflog.Info(ctx, fmt.Sprintf("%s client configured", errorPrefix))
 }
 
 func (d *flavorsDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
@@ -71,11 +107,50 @@ func (d *flavorsDataSource) Read(ctx context.Context, req datasource.ReadRequest
 		return
 	}
 
-	// Todo: Read API call logic
+	ctx = core.InitProviderContext(ctx)
 
-	// Example data value setting
-	// data.Id = types.StringValue("example-id")
+	projectId := data.ProjectId.ValueString()
+	region := d.providerData.GetRegionWithOverride(data.Region)
+	// TODO: implement right identifier for flavors
+	flavorsId := data.Flavors
 
-	// Save data into Terraform state
+	ctx = tflog.SetField(ctx, "project_id", projectId)
+	ctx = tflog.SetField(ctx, "region", region)
+
+	// TODO: implement needed fields
+	ctx = tflog.SetField(ctx, "flavors_id", flavorsId)
+
+	// TODO: refactor to correct implementation
+	_, err := d.client.GetFlavorsRequest(ctx, projectId, region).Execute()
+	if err != nil {
+		utils.LogError(
+			ctx,
+			&resp.Diagnostics,
+			err,
+			"Reading flavors",
+			fmt.Sprintf("flavors with ID %q does not exist in project %q.", flavorsId, projectId),
+			map[int]string{
+				http.StatusForbidden: fmt.Sprintf("Project with ID %q not found or forbidden access", projectId),
+			},
+		)
+		resp.State.RemoveResource(ctx)
+		return
+	}
+
+	ctx = core.LogResponse(ctx)
+
+	// TODO: refactor to correct implementation of internal tf id
+	data.TerraformId = utils.BuildInternalTerraformId(projectId, region)
+
+	// TODO: fill remaining fields
+	// data.Flavors = types.Sometype(apiResponse.GetFlavors())
+	// data.Page = types.Sometype(apiResponse.GetPage())
+	// data.Pagination = types.Sometype(apiResponse.GetPagination())
+	// data.ProjectId = types.Sometype(apiResponse.GetProjectId())
+	// data.Region = types.Sometype(apiResponse.GetRegion())
+	// data.Size = types.Sometype(apiResponse.GetSize())
+	// data.Sort = types.Sometype(apiResponse.GetSort())// Save data into Terraform state
 	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+
+	tflog.Info(ctx, fmt.Sprintf("%s read successful", errorPrefix))
 }