// 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              = &QueueItemDataSource{}
	_ datasource.DataSourceWithConfigure = &QueueItemDataSource{}
)

// NewQueueItemDataSource returns a new queue item data source.
func NewQueueItemDataSource() datasource.DataSource {
	return &QueueItemDataSource{}
}

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

// QueueItemDataSourceModel describes the data source data model.
type QueueItemDataSourceModel struct {
	ID        types.Int64  `tfsdk:"id"`
	Status    types.String `tfsdk:"status"`
	Action    types.String `tfsdk:"action"`
	CreatedAt types.String `tfsdk:"created_at"`
}

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

func (d *QueueItemDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "Fetches a single VirtFusion queue item by ID.",
		Attributes: map[string]schema.Attribute{
			"id": schema.Int64Attribute{
				MarkdownDescription: "The queue item ID.",
				Required:            true,
			},
			"status": schema.StringAttribute{
				MarkdownDescription: "The queue item status.",
				Computed:            true,
			},
			"action": schema.StringAttribute{
				MarkdownDescription: "The queue item action.",
				Computed:            true,
			},
			"created_at": schema.StringAttribute{
				MarkdownDescription: "The creation timestamp.",
				Computed:            true,
			},
		},
	}
}

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

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

	var queueResp client.QueueResponse
	if err := json.Unmarshal(rawResp, &queueResp); err != nil {
		resp.Diagnostics.AddError("Error Parsing Queue Item Response", err.Error())
		return
	}

	data.ID = types.Int64Value(queueResp.Data.ID)
	data.Status = types.StringValue(queueResp.Data.Status)
	data.Action = types.StringValue(queueResp.Data.Action)
	data.CreatedAt = types.StringValue(queueResp.Data.CreatedAt)

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