package provider

import (
	"context"
	"fmt"

	"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"

	edgeclient "edp.buildth.ing/DevFW-CICD/edge-connect-client/v2/sdk/edgeconnect/v2"
)

var _ datasource.DataSource = &AppDataSource{}

func NewAppDataSource() datasource.DataSource {
	return &AppDataSource{}
}

type AppDataSource struct {
	client *edgeclient.Client
}

type AppDataSourceModel struct {
	Name         types.String `tfsdk:"name"`
	Organization types.String `tfsdk:"organization"`
	Version      types.String `tfsdk:"version"`
	Region       types.String `tfsdk:"region"`
}

func (d *AppDataSource) Metadata(ctx context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_app"
}

func (d *AppDataSource) Schema(ctx context.Context, req datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "App data source",

		Attributes: map[string]schema.Attribute{
			"name": schema.StringAttribute{
				MarkdownDescription: "App name (primary key)",
				Required:            true,
			},
			"organization": schema.StringAttribute{
				MarkdownDescription: "Organization name (primary key)",
				Required:            true,
			},
			"version": schema.StringAttribute{
				MarkdownDescription: "App version (primary key)",
				Required:            true,
			},
			"region": schema.StringAttribute{
				MarkdownDescription: "Region (EU or US)",
				Required:            true,
			},
		},
	}
}

func (d *AppDataSource) Configure(ctx context.Context, req datasource.ConfigureRequest, resp *datasource.ConfigureResponse) {
	if req.ProviderData == nil {
		return
	}

	client, ok := req.ProviderData.(*edgeclient.Client)

	if !ok {
		resp.Diagnostics.AddError(
			"Unexpected Data Source Configure Type",
			fmt.Sprintf("Expected *edgeclient.Client, got: %T. Please report this issue to the provider developers.", req.ProviderData),
		)

		return
	}

	d.client = client
}

func (d *AppDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
	var data AppDataSourceModel

	resp.Diagnostics.Append(req.Config.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	appKey := edgeclient.AppKey{
		Organization: data.Organization.ValueString(),
		Name:         data.Name.ValueString(),
		Version:      data.Version.ValueString(),
	}

	region := data.Region.ValueString()

	app, err := d.client.ShowApp(ctx, appKey, region)
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to read app %s/%s/%s in region %s, got error: %s",
			data.Organization.ValueString(), data.Name.ValueString(), data.Version.ValueString(), region, err))
		return
	}

	data.Name = types.StringValue(app.Key.Name)
	data.Organization = types.StringValue(app.Key.Organization)
	data.Version = types.StringValue(app.Key.Version)

	tflog.Trace(ctx, "read an app data source")

	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
}