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 = &AppInstanceResource{}
var _ resource.ResourceWithImportState = &AppInstanceResource{}

func NewAppInstanceResource() resource.Resource {
	return &AppInstanceResource{}
}

type AppInstanceResource struct {
	client *edgeclient.Client
}

type AppInstanceResourceModel struct {
	Id              types.String `tfsdk:"id"`
	Name            types.String `tfsdk:"name"`
	Organization    types.String `tfsdk:"organization"`
	Region          types.String `tfsdk:"region"`
	CloudletOrg     types.String `tfsdk:"cloudlet_org"`
	CloudletName    types.String `tfsdk:"cloudlet_name"`
	AppName         types.String `tfsdk:"app_name"`
	AppVersion      types.String `tfsdk:"app_version"`
	AppOrganization types.String `tfsdk:"app_organization"`
	FlavorName      types.String `tfsdk:"flavor_name"`
	State           types.String `tfsdk:"state"`
	PowerState      types.String `tfsdk:"power_state"`
}

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

func (r *AppInstanceResource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "EdgeConnect AppInstance deployment resource",

		Attributes: map[string]schema.Attribute{
			"id": schema.StringAttribute{
				Computed:            true,
				MarkdownDescription: "AppInstance identifier",
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.UseStateForUnknown(),
				},
			},
			"name": schema.StringAttribute{
				MarkdownDescription: "AppInstance name",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"organization": schema.StringAttribute{
				MarkdownDescription: "Organization name",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"region": schema.StringAttribute{
				MarkdownDescription: "Region (e.g., US, EU)",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"cloudlet_org": schema.StringAttribute{
				MarkdownDescription: "Cloudlet organization",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"cloudlet_name": schema.StringAttribute{
				MarkdownDescription: "Cloudlet name",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"app_name": schema.StringAttribute{
				MarkdownDescription: "Application name",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"app_version": schema.StringAttribute{
				MarkdownDescription: "Application version",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"app_organization": schema.StringAttribute{
				MarkdownDescription: "Application organization",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"flavor_name": schema.StringAttribute{
				MarkdownDescription: "Flavor name",
				Required:            true,
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.RequiresReplace(),
				},
			},
			"state": schema.StringAttribute{
				MarkdownDescription: "AppInstance state",
				Computed:            true,
			},
			"power_state": schema.StringAttribute{
				MarkdownDescription: "AppInstance power state",
				Computed:            true,
			},
		},
	}
}

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

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

	if resp.Diagnostics.HasError() {
		return
	}

	appInstInput := &edgeclient.NewAppInstanceInput{
		Region: data.Region.ValueString(),
		AppInst: edgeclient.AppInstance{
			Key: edgeclient.AppInstanceKey{
				Organization: data.Organization.ValueString(),
				Name:         data.Name.ValueString(),
				CloudletKey: edgeclient.CloudletKey{
					Organization: data.CloudletOrg.ValueString(),
					Name:         data.CloudletName.ValueString(),
				},
			},
			AppKey: edgeclient.AppKey{
				Organization: data.AppOrganization.ValueString(),
				Name:         data.AppName.ValueString(),
				Version:      data.AppVersion.ValueString(),
			},
			Flavor: edgeclient.Flavor{Name: data.FlavorName.ValueString()},
		},
	}

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

	data.Id = types.StringValue(appInstInput.AppInst.Key.Name)
	data.State = types.StringValue("created")

	appInstance, err := r.client.ShowAppInstance(ctx, appInstInput.AppInst.Key, appInstInput.AppInst.AppKey, data.Region.ValueString())
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to read app instance %s, got error: %s", data.Id.ValueString(), err))
		return
	}

	// Update state from API response
	UpdateDataFromAppInstance(&appInstance, &data)

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

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

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

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

	if resp.Diagnostics.HasError() {
		return
	}

	appInstKey := edgeclient.AppInstanceKey{
		Organization: data.Organization.ValueString(),
		Name:         data.Id.ValueString(),
		CloudletKey: edgeclient.CloudletKey{
			Organization: data.CloudletOrg.ValueString(),
			Name:         data.CloudletName.ValueString(),
		},
	}
	appKey := edgeclient.AppKey{
		Name: data.AppName.ValueString(),
	}

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

	// Update state from API response
	UpdateDataFromAppInstance(&appInstance, &data)

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

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

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

	if resp.Diagnostics.HasError() {
		return
	}

	updateInput := &edgeclient.UpdateAppInstanceInput{
		Region: data.Region.ValueString(),
		AppInst: edgeclient.AppInstance{
			Key: edgeclient.AppInstanceKey{
				Organization: data.Organization.ValueString(),
				Name:         data.Name.ValueString(),
				CloudletKey: edgeclient.CloudletKey{
					Organization: data.CloudletOrg.ValueString(),
					Name:         data.CloudletName.ValueString(),
				},
			},
			AppKey: edgeclient.AppKey{
				Organization: data.AppOrganization.ValueString(),
				Name:         data.AppName.ValueString(),
				Version:      data.AppVersion.ValueString(),
			},
			Flavor: edgeclient.Flavor{Name: data.FlavorName.ValueString()},
		},
	}
	appInput := edgeclient.AppKey{
		Name: data.AppName.ValueString(),
	}

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

	appInstance, err := r.client.ShowAppInstance(ctx, updateInput.AppInst.Key, appInput, data.Region.ValueString())
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to read app instance %s, got error: %s", data.Id.ValueString(), err))
		return
	}

	// Update state from API response
	UpdateDataFromAppInstance(&appInstance, &data)
	data.State = types.StringValue("updated")

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

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

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

	if resp.Diagnostics.HasError() {
		return
	}

	appInstKey := edgeclient.AppInstanceKey{
		Organization: data.Organization.ValueString(),
		Name:         data.Id.ValueString(),
		CloudletKey: edgeclient.CloudletKey{
			Organization: data.CloudletOrg.ValueString(),
			Name:         data.CloudletName.ValueString(),
		},
	}

	err := r.client.DeleteAppInstance(ctx, appInstKey, data.Region.ValueString())
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to delete app instance, got error: %s", err))
		return
	}
}

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

func UpdateDataFromAppInstance(appInstance *edgeclient.AppInstance, data *AppInstanceResourceModel) {
	data.Name = types.StringValue(appInstance.Key.Name)
	data.Organization = types.StringValue(appInstance.Key.Organization)
	data.CloudletOrg = types.StringValue(appInstance.Key.CloudletKey.Organization)
	data.CloudletName = types.StringValue(appInstance.Key.CloudletKey.Name)
	data.AppName = types.StringValue(appInstance.AppKey.Name)
	data.AppVersion = types.StringValue(appInstance.AppKey.Version)
	data.AppOrganization = types.StringValue(appInstance.AppKey.Organization)
	data.FlavorName = types.StringValue(appInstance.Flavor.Name)
	data.State = types.StringValue(appInstance.State)
	data.PowerState = types.StringValue(appInstance.PowerState)
}