// Copyright (c) STACKIT

package sqlserverflex

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

	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/conversion"
	sqlserverflexalpha "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexalpha/instance/datasources_gen"
	sqlserverflexalpha2 "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexalpha/instance/resources_gen"
	sqlserverflexUtils "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexalpha/utils"

	sqlserverflex "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/pkg_gen/sqlserverflexalpha"

	"github.com/hashicorp/terraform-plugin-framework/datasource"
	"github.com/hashicorp/terraform-plugin-log/tflog"
	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/core"
	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/utils"
)

// Ensure the implementation satisfies the expected interfaces.
var (
	_ datasource.DataSource = &instanceDataSource{}
)

// NewInstanceDataSource is a helper function to simplify the provider implementation.
func NewInstanceDataSource() datasource.DataSource {
	return &instanceDataSource{}
}

// instanceDataSource is the data source implementation.
type instanceDataSource struct {
	client       *sqlserverflex.APIClient
	providerData core.ProviderData
}

// Metadata returns the data source type name.
func (r *instanceDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_sqlserverflexalpha_instance"
}

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

	apiClient := sqlserverflexUtils.ConfigureClient(ctx, &r.providerData, &resp.Diagnostics)
	if resp.Diagnostics.HasError() {
		return
	}
	r.client = apiClient
	tflog.Info(ctx, "SQLServer Flex instance client configured")
}

// Schema defines the schema for the data source.
func (r *instanceDataSource) Schema(ctx context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	//descriptions := map[string]string{
	//	"main":             "SQLServer Flex ALPHA instance resource schema. Must have a `region` specified in the provider configuration.",
	//	"id":               "Terraform's internal resource ID. It is structured as \"`project_id`,`region`,`instance_id`\".",
	//	"instance_id":      "ID of the SQLServer Flex instance.",
	//	"project_id":       "STACKIT project ID to which the instance is associated.",
	//	"name":             "Instance name.",
	//	"access_scope":     "The access scope of the instance. (e.g. SNA)",
	//	"acl":              "The Access Control List (ACL) for the SQLServer Flex instance.",
	//	"backup_schedule":  `The backup schedule. Should follow the cron scheduling system format (e.g. "0 0 * * *")`,
	//	"region":           "The resource region. If not defined, the provider region is used.",
	//	"encryption":       "The encryption block.",
	//	"network":          "The network block.",
	//	"keyring_id":       "STACKIT KMS - KeyRing ID of the encryption key to use.",
	//	"key_id":           "STACKIT KMS - Key ID of the encryption key to use.",
	//	"key_version":      "STACKIT KMS - Key version to use in the encryption key.",
	//	"service:account":  "STACKIT KMS - service account to use in the encryption key.",
	//	"instance_address": "The returned instance IP address of the SQLServer Flex instance.",
	//	"router_address":   "The returned router IP address of the SQLServer Flex instance.",
	//}

	resp.Schema = sqlserverflexalpha.InstanceDataSourceSchema(ctx)

	//resp.Schema = schema.Schema{
	//	Description: descriptions["main"],
	//	Attributes: map[string]schema.Attribute{
	//		"id": schema.StringAttribute{
	//			Description: descriptions["id"],
	//			Computed:    true,
	//		},
	//		"instance_id": schema.StringAttribute{
	//			Description: descriptions["instance_id"],
	//			Required:    true,
	//			Validators: []validator.String{
	//				validate.UUID(),
	//				validate.NoSeparator(),
	//			},
	//		},
	//		"project_id": schema.StringAttribute{
	//			Description: descriptions["project_id"],
	//			Required:    true,
	//			Validators: []validator.String{
	//				validate.UUID(),
	//				validate.NoSeparator(),
	//			},
	//		},
	//		"name": schema.StringAttribute{
	//			Description: descriptions["name"],
	//			Computed:    true,
	//		},
	//		"backup_schedule": schema.StringAttribute{
	//			Description: descriptions["backup_schedule"],
	//			Computed:    true,
	//		},
	//		"is_deletable": schema.BoolAttribute{
	//			Description: descriptions["is_deletable"],
	//			Computed:    true,
	//		},
	//		"flavor": schema.SingleNestedAttribute{
	//			Computed: true,
	//			Attributes: map[string]schema.Attribute{
	//				"id": schema.StringAttribute{
	//					Computed: true,
	//				},
	//				"description": schema.StringAttribute{
	//					Computed: true,
	//				},
	//				"cpu": schema.Int64Attribute{
	//					Computed: true,
	//				},
	//				"ram": schema.Int64Attribute{
	//					Computed: true,
	//				},
	//				"node_type": schema.StringAttribute{
	//					Computed: true,
	//				},
	//			},
	//		},
	//		"replicas": schema.Int64Attribute{
	//			Computed: true,
	//		},
	//		"storage": schema.SingleNestedAttribute{
	//			Computed: true,
	//			Attributes: map[string]schema.Attribute{
	//				"class": schema.StringAttribute{
	//					Computed: true,
	//				},
	//				"size": schema.Int64Attribute{
	//					Computed: true,
	//				},
	//			},
	//		},
	//		"version": schema.StringAttribute{
	//			Computed: true,
	//		},
	//		"status": schema.StringAttribute{
	//			Computed: true,
	//		},
	//		"edition": schema.StringAttribute{
	//			Computed: true,
	//		},
	//		"retention_days": schema.Int64Attribute{
	//			Computed: true,
	//		},
	//		"region": schema.StringAttribute{
	//			// the region cannot be found, so it has to be passed
	//			Optional:    true,
	//			Description: descriptions["region"],
	//		},
	//		"encryption": schema.SingleNestedAttribute{
	//			Computed: true,
	//			Attributes: map[string]schema.Attribute{
	//				"key_id": schema.StringAttribute{
	//					Description: descriptions["key_id"],
	//					Computed:    true,
	//				},
	//				"key_version": schema.StringAttribute{
	//					Description: descriptions["key_version"],
	//					Computed:    true,
	//				},
	//				"keyring_id": schema.StringAttribute{
	//					Description: descriptions["keyring_id"],
	//					Computed:    true,
	//				},
	//				"service_account": schema.StringAttribute{
	//					Description: descriptions["service_account"],
	//					Computed:    true,
	//				},
	//			},
	//			Description: descriptions["encryption"],
	//		},
	//		"network": schema.SingleNestedAttribute{
	//			Computed: true,
	//			Attributes: map[string]schema.Attribute{
	//				"access_scope": schema.StringAttribute{
	//					Description: descriptions["access_scope"],
	//					Computed:    true,
	//				},
	//				"instance_address": schema.StringAttribute{
	//					Description: descriptions["instance_address"],
	//					Computed:    true,
	//				},
	//				"router_address": schema.StringAttribute{
	//					Description: descriptions["router_address"],
	//					Computed:    true,
	//				},
	//				"acl": schema.ListAttribute{
	//					Description: descriptions["acl"],
	//					ElementType: types.StringType,
	//					Computed:    true,
	//				},
	//			},
	//			Description: descriptions["network"],
	//		},
	//	},
	//}
}

// Read refreshes the Terraform state with the latest data.
func (r *instanceDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) { // nolint:gocritic // function signature required by Terraform
	var model sqlserverflexalpha2.InstanceModel
	diags := req.Config.Get(ctx, &model)
	resp.Diagnostics.Append(diags...)
	if resp.Diagnostics.HasError() {
		return
	}

	ctx = core.InitProviderContext(ctx)

	projectId := model.ProjectId.ValueString()
	instanceId := model.InstanceId.ValueString()
	region := r.providerData.GetRegionWithOverride(model.Region)
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "instance_id", instanceId)
	ctx = tflog.SetField(ctx, "region", region)
	instanceResp, err := r.client.GetInstanceRequest(ctx, projectId, region, instanceId).Execute()
	if err != nil {
		utils.LogError(
			ctx,
			&resp.Diagnostics,
			err,
			"Reading instance",
			fmt.Sprintf("Instance with ID %q does not exist in project %q.", instanceId, 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)

	//var storage = &storageModel{}
	//if !model.Storage.IsNull() && !model.Storage.IsUnknown() {
	//	diags = model.Storage.As(ctx, storage, basetypes.ObjectAsOptions{})
	//	resp.Diagnostics.Append(diags...)
	//	if resp.Diagnostics.HasError() {
	//		return
	//	}
	//}
	//
	//var encryption = &encryptionModel{}
	//if !model.Encryption.IsNull() && !model.Encryption.IsUnknown() {
	//	diags = model.Encryption.As(ctx, encryption, basetypes.ObjectAsOptions{})
	//	resp.Diagnostics.Append(diags...)
	//	if resp.Diagnostics.HasError() {
	//		return
	//	}
	//}
	//
	//var network = &networkModel{}
	//if !model.Network.IsNull() && !model.Network.IsUnknown() {
	//	diags = model.Network.As(ctx, network, basetypes.ObjectAsOptions{})
	//	resp.Diagnostics.Append(diags...)
	//	if resp.Diagnostics.HasError() {
	//		return
	//	}
	//}

	err = mapResponseToModel(ctx, instanceResp, &model, resp.Diagnostics)
	//err = mapFields(ctx, instanceResp, &model, storage, encryption, network, region)
	if err != nil {
		core.LogAndAddError(ctx, &resp.Diagnostics, "Error reading instance", 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, "SQLServer Flex instance read")
}