// Copyright (c) EZSCALE.
// SPDX-License-Identifier: MPL-2.0

package provider

import (
	"context"
	"encoding/json"
	"fmt"

	"terraform-provider-virtfusion/internal/client"

	"github.com/hashicorp/terraform-plugin-framework/datasource"
	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
	"github.com/hashicorp/terraform-plugin-framework/types"
)

var (
	_ datasource.DataSource              = &PackageDataSource{}
	_ datasource.DataSourceWithConfigure = &PackageDataSource{}
)

// NewPackageDataSource returns a new package data source.
func NewPackageDataSource() datasource.DataSource {
	return &PackageDataSource{}
}

// PackageDataSource defines the data source implementation.
type PackageDataSource struct {
	client *client.Client
}

// PackageDataSourceModel describes the data source data model.
type PackageDataSourceModel struct {
	ID                   types.Int64  `tfsdk:"id"`
	Name                 types.String `tfsdk:"name"`
	Enabled              types.Bool   `tfsdk:"enabled"`
	CPUCores             types.Int64  `tfsdk:"cpu_cores"`
	Memory               types.Int64  `tfsdk:"memory"`
	Storage              types.Int64  `tfsdk:"storage"`
	Traffic              types.Int64  `tfsdk:"traffic"`
	NetworkSpeedInbound  types.Int64  `tfsdk:"network_speed_inbound"`
	NetworkSpeedOutbound types.Int64  `tfsdk:"network_speed_outbound"`
	Ipv4                 types.Int64  `tfsdk:"ipv4"`
}

func (d *PackageDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
	resp.TypeName = req.ProviderTypeName + "_package"
}

func (d *PackageDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "Fetches a single VirtFusion package by ID.",
		Attributes: map[string]schema.Attribute{
			"id": schema.Int64Attribute{
				MarkdownDescription: "The package ID.",
				Required:            true,
			},
			"name": schema.StringAttribute{
				MarkdownDescription: "The package name.",
				Computed:            true,
			},
			"enabled": schema.BoolAttribute{
				MarkdownDescription: "Whether the package is enabled.",
				Computed:            true,
			},
			"cpu_cores": schema.Int64Attribute{
				MarkdownDescription: "The number of CPU cores in the package.",
				Computed:            true,
			},
			"memory": schema.Int64Attribute{
				MarkdownDescription: "The amount of memory in the package.",
				Computed:            true,
			},
			"storage": schema.Int64Attribute{
				MarkdownDescription: "The amount of storage in the package.",
				Computed:            true,
			},
			"traffic": schema.Int64Attribute{
				MarkdownDescription: "The traffic limit in the package.",
				Computed:            true,
			},
			"network_speed_inbound": schema.Int64Attribute{
				MarkdownDescription: "The inbound network speed in the package.",
				Computed:            true,
			},
			"network_speed_outbound": schema.Int64Attribute{
				MarkdownDescription: "The outbound network speed in the package.",
				Computed:            true,
			},
			"ipv4": schema.Int64Attribute{
				MarkdownDescription: "The number of IPv4 addresses in the package.",
				Computed:            true,
			},
		},
	}
}

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

	c, ok := req.ProviderData.(*client.Client)
	if !ok {
		resp.Diagnostics.AddError(
			"Unexpected Data Source Configure Type",
			fmt.Sprintf("Expected *client.Client, got: %T.", req.ProviderData),
		)
		return
	}

	d.client = c
}

func (d *PackageDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
	var data PackageDataSourceModel
	resp.Diagnostics.Append(req.Config.Get(ctx, &data)...)
	if resp.Diagnostics.HasError() {
		return
	}

	rawResp, err := d.client.Get(ctx, fmt.Sprintf("/packages/%d", data.ID.ValueInt64()))
	if err != nil {
		resp.Diagnostics.AddError("Error Reading Package", err.Error())
		return
	}

	var pkgResp client.PackageResponse
	if err := json.Unmarshal(rawResp, &pkgResp); err != nil {
		resp.Diagnostics.AddError("Error Parsing Package Response", err.Error())
		return
	}

	data.ID = types.Int64Value(pkgResp.Data.ID)
	data.Name = types.StringValue(pkgResp.Data.Name)
	data.Enabled = types.BoolValue(pkgResp.Data.Enabled)
	data.CPUCores = types.Int64Value(pkgResp.Data.CPUCores)
	data.Memory = types.Int64Value(pkgResp.Data.Memory)
	data.Storage = types.Int64Value(pkgResp.Data.Storage)
	data.Traffic = types.Int64Value(pkgResp.Data.Traffic)
	data.NetworkSpeedInbound = types.Int64Value(pkgResp.Data.NetworkSpeedInbound)
	data.NetworkSpeedOutbound = types.Int64Value(pkgResp.Data.NetworkSpeedOutbound)
	data.Ipv4 = types.Int64Value(pkgResp.Data.Ipv4)

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