package sqlserverflexbeta

import (
	"context"
	"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/sqlserverflexbeta"

	"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"

	sqlserverflexbetaResGen "tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/stackit/internal/services/sqlserverflexbeta/user/resources_gen"
)

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

func NewUserResource() resource.Resource {
	return &userResource{}
}

type userResource struct {
	client       *sqlserverflexbeta.APIClient
	providerData core.ProviderData
}

type UserResourceIdentityModel struct {
	ProjectID types.String `tfsdk:"project_id"`
	Region    types.String `tfsdk:"region"`
	UserID    types.String `tfsdk:"instance_id"`
	// TODO: implement further needed parts
}

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

func (r *userResource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
	resp.Schema = sqlserverflexbetaResGen.UserResourceSchema(ctx)
}

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
			},
		},
	}
}

// Configure adds the provider configured client to the resource.
func (r *userResource) 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.SqlserverflexbetaCustomEndpoint != "" {
		apiClientConfigOptions = append(apiClientConfigOptions, config.WithEndpoint(r.providerData.sqlserverflexbetaCustomEndpoint))
	} else {
		apiClientConfigOptions = append(apiClientConfigOptions, config.WithRegion(r.providerData.GetRegion()))
	}
	apiClient, err := sqlserverflexbeta.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, "sqlserverflexbeta.User client configured")
}

func (r *userResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) {
	var data sqlserverflexbetaResGen.UserModel

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

	if resp.Diagnostics.HasError() {
		return
	}

	// Read identity data
	var identityData UserResourceIdentityModel
	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: 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 User",
		    			fmt.Sprintf("Creating API payload: %v", err),
		    		)
		    		return
		    	}
		    	// Create new User
		    	createResp, err := r.client.CreateUserRequest(
		    		ctx,
		    		projectId,
		    		region,
		    	).CreateUserRequestPayload(*payload).Execute()
		    	if err != nil {
		    		core.LogAndAddError(ctx, &resp.Diagnostics, "Error creating User", fmt.Sprintf("Calling API: %v", err))
		    		return
		    	}

		    	ctx = core.LogResponse(ctx)

		    	UserId := *createResp.Id
	*/

	// Example data value setting
	data.UserId = types.StringValue("id-from-response")

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

	// TODO: implement wait handler if needed
	/*

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

		    	if waitResp.Id == nil {
		    		core.LogAndAddError(
		    			ctx,
		    			&resp.Diagnostics,
		    			"Error creating User",
		    			"User 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 User",
		    			fmt.Sprintf("Processing API payload: %v", err),
		    		)
		    		return
		    	}

	*/

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

	tflog.Info(ctx, "sqlserverflexbeta.User created")
}

func (r *userResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) {
	var data sqlserverflexbetaResGen.UserModel

	// 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 UserResourceIdentityModel
	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 := UserResourceIdentityModel{
		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, "sqlserverflexbeta.User read")
}

func (r *userResource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) {
	var data sqlserverflexbetaResGen.UserModel

	// 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 UserResourceIdentityModel
	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: Update API call logic

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

	tflog.Info(ctx, "sqlserverflexbeta.User updated")
}

func (r *userResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
	var data sqlserverflexbetaResGen.UserModel

	// 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 UserResourceIdentityModel
	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, "sqlserverflexbeta.User deleted")
}

// ModifyPlan implements resource.ResourceWithModifyPlan.
// Use the modifier to set the effective region in the current plan.
func (r *userResource) ModifyPlan(
	ctx context.Context,
	req resource.ModifyPlanRequest,
	resp *resource.ModifyPlanResponse,
) { // nolint:gocritic // function signature required by Terraform
	var configModel sqlserverflexbetaResGen.UserModel
	// skip initial empty configuration to avoid follow-up errors
	if req.Config.Raw.IsNull() {
		return
	}
	resp.Diagnostics.Append(req.Config.Get(ctx, &configModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

	var planModel sqlserverflexbetaResGen.UserModel
	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
	}

	var identityModel UserResourceIdentityModel
	identityModel.ProjectID = planModel.ProjectId
	identityModel.Region = planModel.Region
	// TODO: complete
	//if !planModel.InstanceId.IsNull() && !planModel.InstanceId.IsUnknown() {
	//	identityModel.InstanceID = planModel.InstanceId
	//}

	resp.Diagnostics.Append(resp.Identity.Set(ctx, identityModel)...)
	if resp.Diagnostics.HasError() {
		return
	}

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

// 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 *userResource) ImportState(
	ctx context.Context,
	req resource.ImportStateRequest,
	resp *resource.ImportStateResponse,
) {
	idParts := strings.Split(req.ID, core.Separator)

	// Todo: Import logic
	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,
		"Sqlserverflexbeta 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, "Sqlserverflexbeta user state imported")
}