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

package provider

import (
	"context"
	"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              = &SelfServiceHourlyStatsDataSource{}
	_ datasource.DataSourceWithConfigure = &SelfServiceHourlyStatsDataSource{}
)

// NewSelfServiceHourlyStatsDataSource returns a new self-service hourly stats data source.
func NewSelfServiceHourlyStatsDataSource() datasource.DataSource {
	return &SelfServiceHourlyStatsDataSource{}
}

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

// SelfServiceHourlyStatsDataSourceModel describes the data source data model.
type SelfServiceHourlyStatsDataSourceModel struct {
	UserID    types.Int64  `tfsdk:"user_id"`
	GroupID   types.Int64  `tfsdk:"group_id"`
	StatsJSON types.String `tfsdk:"stats_json"`
}

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

func (d *SelfServiceHourlyStatsDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "Fetches VirtFusion self-service hourly stats for a user and group.",
		Attributes: map[string]schema.Attribute{
			"user_id": schema.Int64Attribute{
				MarkdownDescription: "The user ID to fetch hourly stats for.",
				Required:            true,
			},
			"group_id": schema.Int64Attribute{
				MarkdownDescription: "The group ID to fetch hourly stats for.",
				Required:            true,
			},
			"stats_json": schema.StringAttribute{
				MarkdownDescription: "The raw JSON response containing hourly stats.",
				Computed:            true,
			},
		},
	}
}

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

	rawResp, err := d.client.Get(ctx, fmt.Sprintf("/selfService/hourlyStats/byUser/%d/group/%d", data.UserID.ValueInt64(), data.GroupID.ValueInt64()))
	if err != nil {
		resp.Diagnostics.AddError("Error Reading Self-Service Hourly Stats", err.Error())
		return
	}

	data.StatsJSON = types.StringValue(string(rawResp))

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