package sqlserverflexbeta

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

	"github.com/hashicorp/terraform-plugin-framework/datasource"
	"github.com/hashicorp/terraform-plugin-framework/types"
	"github.com/hashicorp/terraform-plugin-log/tflog"

	"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/sqlserverflexbeta/utils"
	"tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/utils"

	sqlserverflexbetaPkg "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/pkg_gen/sqlserverflexbeta"
	sqlserverflexbetaGen "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexbeta/user/datasources_gen"
)

var _ datasource.DataSource = (*userDataSource)(nil)

const errorPrefix = "[Sqlserverflexbeta - User]"

func NewUserDataSource() datasource.DataSource {
	return &userDataSource{}
}

type dataSourceModel struct {
	DefaultDatabase types.String `tfsdk:"default_database"`
	Host            types.String `tfsdk:"host"`
	Id              types.String `tfsdk:"id"`
	InstanceId      types.String `tfsdk:"instance_id"`
	Port            types.Int64  `tfsdk:"port"`
	ProjectId       types.String `tfsdk:"project_id"`
	Region          types.String `tfsdk:"region"`
	Roles           types.List   `tfsdk:"roles"`
	Status          types.String `tfsdk:"status"`
	UserId          types.Int64  `tfsdk:"user_id"`
	Username        types.String `tfsdk:"username"`
}

type userDataSource struct {
	client       *sqlserverflexbetaPkg.APIClient
	providerData core.ProviderData
}

func (d *userDataSource) Metadata(
	_ context.Context,
	req datasource.MetadataRequest,
	resp *datasource.MetadataResponse,
) {
	resp.TypeName = req.ProviderTypeName + "_sqlserverflexbeta_user"
}

func (d *userDataSource) Schema(ctx context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	resp.Schema = sqlserverflexbetaGen.UserDataSourceSchema(ctx)
}

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

	apiClient := sqlserverflexUtils.ConfigureClient(ctx, &d.providerData, &resp.Diagnostics)
	if resp.Diagnostics.HasError() {
		return
	}
	d.client = apiClient
	tflog.Info(ctx, "SQL SERVER Flex alpha database client configured")
}

func (d *userDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
	var model dataSourceModel
	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()
	userId := model.UserId.ValueInt64()
	region := d.providerData.GetRegionWithOverride(model.Region)
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "instance_id", instanceId)
	ctx = tflog.SetField(ctx, "user_id", userId)
	ctx = tflog.SetField(ctx, "region", region)

	recordSetResp, err := d.client.GetUserRequest(ctx, projectId, region, instanceId, userId).Execute()
	if err != nil {
		utils.LogError(
			ctx,
			&resp.Diagnostics,
			err,
			"Reading user",
			fmt.Sprintf(
				"User with ID %q or instance with ID %q does not exist in project %q.",
				userId,
				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)

	// Map response body to schema and populate Computed attribute values
	err = mapDataSourceFields(recordSetResp, &model, region)
	if err != nil {
		core.LogAndAddError(
			ctx,
			&resp.Diagnostics,
			"Error reading user",
			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 beta instance read")
}