package {{.PackageName}}

import (
	"context"
	_ "embed"
	"fmt"
	"strings"

	"github.com/hashicorp/terraform-plugin-framework/path"
	"github.com/hashicorp/terraform-plugin-framework/resource"
	"github.com/hashicorp/terraform-plugin-framework/resource/identityschema"
	"github.com/hashicorp/terraform-plugin-framework/types"
	"github.com/hashicorp/terraform-plugin-log/tflog"
	"github.com/stackitcloud/stackit-sdk-go/core/config"
	"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/pkg_gen/{{.PackageName}}"

	"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"

	{{.PackageName}}ResGen "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/{{.PackageName}}/{{.NameSnake}}/resources_gen"
)

var (
	_ resource.Resource                = &{{.NameCamel}}Resource{}
	_ resource.ResourceWithConfigure   = &{{.NameCamel}}Resource{}
	_ resource.ResourceWithImportState = &{{.NameCamel}}Resource{}
	_ resource.ResourceWithModifyPlan  = &{{.NameCamel}}Resource{}
	_ resource.ResourceWithIdentity    = &{{.NameCamel}}Resource{}
)

func New{{.NamePascal}}Resource() resource.Resource {
	return &{{.NameCamel}}Resource{}
}

type {{.NameCamel}}Resource struct{
	client       *{{.PackageName}}.APIClient
	providerData core.ProviderData
}

// resourceModel represents the Terraform resource state
type resourceModel = {{.PackageName}}.{{.NamePascal}}Model

type {{.NamePascal}}ResourceIdentityModel struct {
	ProjectID  types.String `tfsdk:"project_id"`
	Region     types.String `tfsdk:"region"`
	// TODO: implement further needed parts
	{{.NamePascal}}ID types.String `tfsdk:"{{.NameSnake}}_id"`
}

// Metadata defines terraform resource name
func (r *{{.NameCamel}}Resource) Metadata(ctx context.Context, req resource.MetadataRequest, resp *resource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_{{.PackageName}}_{{.NameSnake}}"
}

//go:embed planModifiers.yaml
var modifiersFileByte []byte

// Schema loads the schema from generated files and adds plan modifiers
func (r *{{.NameCamel}}Resource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
	schema = {{.PackageName}}ResGen.{{.NamePascal}}ResourceSchema(ctx)

    fields, err := {{.PackageName}}Utils.ReadModifiersConfig(modifiersFileByte)
    if err != nil {
        resp.Diagnostics.AddError("error during read modifiers config file", err.Error())
        return
    }

    err = {{.PackageName}}Utils.AddPlanModifiersToResourceSchema(fields, &schema)
    if err != nil {
        resp.Diagnostics.AddError("error adding plan modifiers", err.Error())
        return
    }
    resp.Schema = schema
}

// IdentitySchema defines the identity schema
func (r *instanceResource) IdentitySchema(_ context.Context, _ resource.IdentitySchemaRequest, resp *resource.IdentitySchemaResponse) {
	resp.IdentitySchema = identityschema.Schema{
		Attributes: map[string]identityschema.Attribute{
			"project_id": identityschema.StringAttribute{
				RequiredForImport: true, // must be set during import by the practitioner
			},
			"region": identityschema.StringAttribute{
				RequiredForImport: true, // can be defaulted by the provider configuration
			},
			"instance_id": identityschema.StringAttribute{
				RequiredForImport: true, // can be defaulted by the provider configuration
			},
			// TODO: implement remaining schema parts
		},
	}
}

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

	apiClientConfigOptions := []config.ConfigurationOption{
		config.WithCustomAuth(r.providerData.RoundTripper),
		utils.UserAgentConfigOption(r.providerData.Version),
	}
	if r.providerData.{{.PackageNamePascal}}CustomEndpoint != "" {
		apiClientConfigOptions = append(apiClientConfigOptions, config.WithEndpoint(r.providerData.{{.PackageName}}CustomEndpoint))
	} else {
		apiClientConfigOptions = append(apiClientConfigOptions, config.WithRegion(r.providerData.GetRegion()))
	}
	apiClient, err := {{.PackageName}}.NewAPIClient(apiClientConfigOptions...)
	if err != nil {
		resp.Diagnostics.AddError(
		    "Error configuring API client",
		    fmt.Sprintf(
		        "Configuring client: %v. This is an error related to the provider configuration, not to the resource configuration",
		        err,
            ),
        )
		return
	}
	r.client = apiClient
	tflog.Info(ctx, "{{.PackageName}}.{{.NamePascal}} client configured")
}

// ModifyPlan implements resource.ResourceWithModifyPlan.
// Use the modifier to set the effective region in the current plan.
func (r *{{.NameCamel}}Resource) ModifyPlan(
	ctx context.Context,
	req resource.ModifyPlanRequest,
	resp *resource.ModifyPlanResponse,
) { // nolint:gocritic // function signature required by Terraform

	// skip initial empty configuration to avoid follow-up errors
	if req.Config.Raw.IsNull() {
		return
	}
	var configModel {{.PackageName}}ResGen.{{.NamePascal}}Model
	resp.Diagnostics.Append(req.Config.Get(ctx, &configModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

	if req.Plan.Raw.IsNull() {
		return
	}
	var planModel {{.PackageName}}ResGen.{{.NamePascal}}Model
	resp.Diagnostics.Append(req.Plan.Get(ctx, &planModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

	utils.AdaptRegion(ctx, configModel.Region, &planModel.Region, r.providerData.GetRegion(), resp)
	if resp.Diagnostics.HasError() {
		return
	}

	resp.Diagnostics.Append(resp.Plan.Set(ctx, planModel)...)
	if resp.Diagnostics.HasError() {
		return
	}
}

// Create creates a new resource
func (r *{{.NameCamel}}Resource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) {
	var data {{.PackageName}}ResGen.{{.NamePascal}}Model

	// Read Terraform plan data into the model
	resp.Diagnostics.Append(req.Plan.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	ctx = core.InitProviderContext(ctx)

	projectId := data.ProjectId.ValueString()
	region := data.Region.ValueString()
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "region", region)
	// TODO: add remaining fields

	// TODO: Create API call logic
	/*
		// Generate API request body from model
    	payload, err := toCreatePayload(ctx, &model)
    	if err != nil {
    		core.LogAndAddError(
    			ctx,
    			&resp.Diagnostics,
    			"Error creating {{.NamePascal}}",
    			fmt.Sprintf("Creating API payload: %v", err),
    		)
    		return
    	}
    	// Create new {{.NamePascal}}
    	createResp, err := r.client.Create{{.NamePascal}}Request(
    		ctx,
    		projectId,
    		region,
    	).Create{{.NamePascal}}RequestPayload(*payload).Execute()
    	if err != nil {
    		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating {{.NamePascal}}", fmt.Sprintf("Calling API: %v", err))
    		return
    	}

    	ctx = core.LogResponse(ctx)

    	{{.NamePascal}}Id := *createResp.Id
    */

	// Example data value setting
	data.{{.NameCamel | ucfirst}}Id = types.StringValue("id-from-response")

	// TODO: Set data returned by API in identity
	identity := {{.NamePascal}}ResourceIdentityModel{
		ProjectID:  types.StringValue(projectId),
		Region:     types.StringValue(region),
		// TODO: add missing values
		{{.NamePascal}}ID: types.StringValue({{.NamePascal}}Id),
	}
	resp.Diagnostics.Append(resp.Identity.Set(ctx, identity)...)
	if resp.Diagnostics.HasError() {
		return
	}

	// TODO: implement wait handler if needed
	/*

		waitResp, err := wait.Create{{.NamePascal}}WaitHandler(
    		ctx,
    		r.client,
    		projectId,
    		{{.NamePascal}}Id,
    		region,
    	).SetSleepBeforeWait(
    		30 * time.Second,
    	).SetTimeout(
    		90 * time.Minute,
    	).WaitWithContext(ctx)
    	if err != nil {
    		core.LogAndAddError(
    			ctx,
    			&resp.Diagnostics,
    			"Error creating {{.NamePascal}}",
    			fmt.Sprintf("{{.NamePascal}} creation waiting: %v", err),
    		)
    		return
    	}

    	if waitResp.Id == nil {
    		core.LogAndAddError(
    			ctx,
    			&resp.Diagnostics,
    			"Error creating {{.NamePascal}}",
    			"{{.NamePascal}} creation waiting: returned id is nil",
    		)
    		return
    	}

    	// Map response body to schema
    	err = mapResponseToModel(ctx, waitResp, &model, resp.Diagnostics)
    	if err != nil {
    		core.LogAndAddError(
    			ctx,
    			&resp.Diagnostics,
    			"Error creating {{.NamePascal}}",
    			fmt.Sprintf("Processing API payload: %v", err),
    		)
    		return
    	}

	*/

	// Save data into Terraform state
	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)

	tflog.Info(ctx, "{{.PackageName}}.{{.NamePascal}} created")
}

func (r *{{.NameCamel}}Resource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) {
	var data {{.PackageName}}ResGen.{{.NamePascal}}Model

	// Read Terraform prior state data into the model
	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
	if resp.Diagnostics.HasError() {
		return
	}

	// Read identity data
	var identityData {{.NamePascal}}ResourceIdentityModel
	resp.Diagnostics.Append(req.Identity.Get(ctx, &identityData)...)
	if resp.Diagnostics.HasError() {
		return
	}


	ctx = core.InitProviderContext(ctx)

	projectId := identityData.ProjectID.ValueString()
	region := identityData.Region.ValueString()
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "region", region)

	// TODO: Read API call logic

	// Save updated data into Terraform state
	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)

	// TODO: Set data returned by API in identity
	identity := {{.NamePascal}}ResourceIdentityModel{
		ProjectID:  types.StringValue(projectId),
		Region:     types.StringValue(region),
		// InstanceID: types.StringValue(instanceId),
	}
	resp.Diagnostics.Append(resp.Identity.Set(ctx, identity)...)
	if resp.Diagnostics.HasError() {
		return
	}

	tflog.Info(ctx, "{{.PackageName}}.{{.NamePascal}} read")
}

func (r *{{.NameCamel}}Resource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) {
	var data {{.PackageName}}ResGen.{{.NamePascal}}Model

	// Read Terraform prior state data into the model
	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
	if resp.Diagnostics.HasError() {
		return
	}

	ctx = core.InitProviderContext(ctx)

	projectId := data.ProjectId.ValueString()
	region := data.Region.ValueString()
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "region", region)

	// TODO: Update API call logic

	// TODO: Set data returned by API in identity
	identity := {{.NamePascal}}ResourceIdentityModel{
		ProjectID:  types.StringValue(projectId),
		Region:     types.StringValue(region),
		// TODO: add missing values
		{{.NamePascal}}ID: types.StringValue({{.NamePascal}}Id),
	}
	resp.Diagnostics.Append(resp.Identity.Set(ctx, identity)...)
	if resp.Diagnostics.HasError() {
		return
	}

	// Save updated data into Terraform state
	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)

	tflog.Info(ctx, "{{.PackageName}}.{{.NamePascal}} updated")
}

func (r *{{.NameCamel}}Resource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
	var data {{.PackageName}}ResGen.{{.NamePascal}}Model

	// Read Terraform prior state data into the model
	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)
	if resp.Diagnostics.HasError() {
		return
	}

	// Read identity data
	var identityData {{.NamePascal}}ResourceIdentityModel
	resp.Diagnostics.Append(req.Identity.Get(ctx, &identityData)...)
	if resp.Diagnostics.HasError() {
		return
	}


	ctx = core.InitProviderContext(ctx)

	projectId := identityData.ProjectID.ValueString()
	region := identityData.Region.ValueString()
	ctx = tflog.SetField(ctx, "project_id", projectId)
	ctx = tflog.SetField(ctx, "region", region)

	// TODO: Delete API call logic

	tflog.Info(ctx, "{{.PackageName}}.{{.NamePascal}} deleted")
}

// ImportState imports a resource into the Terraform state on success.
// The expected format of the resource import identifier is: project_id,zone_id,record_set_id
func (r *{{.NameCamel}}Resource) ImportState(
	ctx context.Context,
	req resource.ImportStateRequest,
	resp *resource.ImportStateResponse,
) {
	idParts := strings.Split(req.ID, core.Separator)

	// TODO: Import logic
	// TODO: fix len and parts itself
	if len(idParts) < 2 || idParts[0] == "" || idParts[1] == "" {
		core.LogAndAddError(
			ctx, &resp.Diagnostics,
			"Error importing database",
			fmt.Sprintf(
				"Expected import identifier with format [project_id],[region],..., got %q",
				req.ID,
			),
		)
		return
	}

	resp.Diagnostics.Append(resp.State.SetAttribute(ctx, path.Root("project_id"), idParts[0])...)
	resp.Diagnostics.Append(resp.State.SetAttribute(ctx, path.Root("region"), idParts[1])...)
	// ... more ...

	core.LogAndAddWarning(
		ctx,
		&resp.Diagnostics,
		"{{.PackageName | ucfirst}} database imported with empty password",
		"The database password is not imported as it is only available upon creation of a new database. The password field will be empty.",
	)
	tflog.Info(ctx, "{{.PackageName | ucfirst}} {{.NameCamel}} state imported")
}