package provider

import (
	"context"
	"fmt"

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

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

var _ resource.Resource = &AppResource{}
var _ resource.ResourceWithImportState = &AppResource{}

func NewAppResource() resource.Resource {
	return &AppResource{}
}

type AppResource struct {
	client *edgeclient.Client
}

type AppResourceModel struct {
	Id          types.String `tfsdk:"id"`
	Name        types.String `tfsdk:"name"`
	Description types.String `tfsdk:"description"`
	Version     types.String `tfsdk:"version"`
	Status      types.String `tfsdk:"status"`
}

func (r *AppResource) Metadata(ctx context.Context, req resource.MetadataRequest, resp *resource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_app"
}

func (r *AppResource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "App resource",

		Attributes: map[string]schema.Attribute{
			"id": schema.StringAttribute{
				Computed:            true,
				MarkdownDescription: "App identifier",
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.UseStateForUnknown(),
				},
			},
			"name": schema.StringAttribute{
				MarkdownDescription: "App name",
				Required:            true,
			},
			"description": schema.StringAttribute{
				MarkdownDescription: "App description",
				Optional:            true,
			},
			"version": schema.StringAttribute{
				MarkdownDescription: "App version",
				Optional:            true,
			},
			"status": schema.StringAttribute{
				MarkdownDescription: "App status",
				Computed:            true,
			},
		},
	}
}

func (r *AppResource) Configure(ctx context.Context, req resource.ConfigureRequest, resp *resource.ConfigureResponse) {
	if req.ProviderData == nil {
		return
	}

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

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

		return
	}

	r.client = client
}

func (r *AppResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) {
	var data AppResourceModel

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

	if resp.Diagnostics.HasError() {
		return
	}

	appInput := &edgeclient.NewAppInput{
		Region: "default",
		App: edgeclient.App{
			Key: edgeclient.AppKey{
				Organization: "default",
				Name:         data.Name.ValueString(),
				Version:      data.Version.ValueString(),
			},
			Deployment:          "kubernetes",
			ImageType:           "docker",
			ImagePath:          "nginx:latest",
		},
	}

	err := r.client.CreateApp(ctx, appInput)
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to create app, got error: %s", err))
		return
	}

	data.Id = types.StringValue(appInput.App.Key.Name)
	data.Name = types.StringValue(appInput.App.Key.Name)
	data.Description = types.StringValue("")
	data.Version = types.StringValue(appInput.App.Key.Version)
	data.Status = types.StringValue("created")

	tflog.Trace(ctx, "created an app resource")

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

func (r *AppResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) {
	var data AppResourceModel

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

	if resp.Diagnostics.HasError() {
		return
	}

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

	app, err := r.client.ShowApp(ctx, appKey, "default")
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to read app %s, got error: %s", data.Id.ValueString(), err))
		return
	}

	data.Name = types.StringValue(app.Key.Name)
	data.Description = types.StringValue("")
	data.Version = types.StringValue(app.Key.Version)
	data.Status = types.StringValue("")

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

func (r *AppResource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) {
	var data AppResourceModel

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

	if resp.Diagnostics.HasError() {
		return
	}

	updateInput := &edgeclient.UpdateAppInput{
		Region: "default",
		App: edgeclient.App{
			Key: edgeclient.AppKey{
				Organization: "default",
				Name:         data.Name.ValueString(),
				Version:      data.Version.ValueString(),
			},
			Deployment:          "kubernetes",
			ImageType:           "docker",
			ImagePath:          "nginx:latest",
		},
	}

	err := r.client.UpdateApp(ctx, updateInput)
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to update app, got error: %s", err))
		return
	}

	data.Name = types.StringValue(updateInput.App.Key.Name)
	data.Description = types.StringValue("")
	data.Version = types.StringValue(updateInput.App.Key.Version)
	data.Status = types.StringValue("updated")

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

func (r *AppResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
	var data AppResourceModel

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

	if resp.Diagnostics.HasError() {
		return
	}

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

	err := r.client.DeleteApp(ctx, appKey, "default")
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to delete app, got error: %s", err))
		return
	}
}

func (r *AppResource) ImportState(ctx context.Context, req resource.ImportStateRequest, resp *resource.ImportStateResponse) {
	resource.ImportStatePassthroughID(ctx, path.Root("id"), req, resp)
}