package provider

import (
	"context"
	"fmt"

	"github.com/hashicorp/terraform-plugin-framework/path"
	"github.com/hashicorp/terraform-plugin-framework/resource"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
	"github.com/hashicorp/terraform-plugin-framework/types"
	"github.com/immich-app/terraform-provider-immich/internal/client"
)

// Ensure the implementation satisfies the expected interfaces.
var _ resource.Resource = &apiKeyResource{}
var _ resource.ResourceWithImportState = &apiKeyResource{}

func NewApiKeyResource() resource.Resource {
	return &apiKeyResource{}
}

// apiKeyResource defines the resource implementation.
type apiKeyResource struct {
	client *client.Client
}

// apiKeyResourceModel describes the resource data model.
type apiKeyResourceModel struct {
	ID          types.String   `tfsdk:"id"`
	Name        types.String   `tfsdk:"name"`
	Permissions []types.String `tfsdk:"permissions"`
	Secret      types.String   `tfsdk:"secret"`
}

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

func (r *apiKeyResource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
	resp.Schema = schema.Schema{
		MarkdownDescription: "Manages an Immich personal API key. Note that the secret is only available upon creation.",

		Attributes: map[string]schema.Attribute{
			"id": schema.StringAttribute{
				Computed:            true,
				MarkdownDescription: "Unique identifier for the API key.",
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.UseStateForUnknown(),
				},
			},
			"name": schema.StringAttribute{
				Optional:            true,
				MarkdownDescription: "Display name for the API key.",
			},
			"permissions": schema.ListAttribute{
				ElementType:         types.StringType,
				Required:            true,
				MarkdownDescription: "List of permissions granted to this API key (e.g. `asset.read`, `asset.upload`).",
			},
			"secret": schema.StringAttribute{
				Computed:            true,
				Sensitive:           true,
				MarkdownDescription: "The generated API key secret. This value is only returned when the key is created.",
				PlanModifiers: []planmodifier.String{
					stringplanmodifier.UseStateForUnknown(),
				},
			},
		},
	}
}

func (r *apiKeyResource) Configure(ctx context.Context, req resource.ConfigureRequest, resp *resource.ConfigureResponse) {
	if req.ProviderData == nil {
		return
	}

	client, ok := req.ProviderData.(*client.Client)

	if !ok {
		resp.Diagnostics.AddError(
			"Unexpected Resource Configure Type",
			fmt.Sprintf("Expected *client.Client, got: %T. Please report this issue to the provider developers.", req.ProviderData),
		)

		return
	}

	r.client = client
}

func (r *apiKeyResource) Create(ctx context.Context, req resource.CreateRequest, resp *resource.CreateResponse) {
	var data apiKeyResourceModel

	resp.Diagnostics.Append(req.Plan.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	permissions := make([]string, len(data.Permissions))
	for i, p := range data.Permissions {
		permissions[i] = p.ValueString()
	}

	createReq := client.ApiKeyCreateRequest{
		Name:        data.Name.ValueString(),
		Permissions: permissions,
	}

	apiKeyResp, err := r.client.CreateApiKey(createReq)
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to create API key, got error: %s", err))
		return
	}

	data.ID = types.StringValue(apiKeyResp.ApiKey.ID)
	data.Secret = types.StringValue(apiKeyResp.Secret)

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

func (r *apiKeyResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) {
	var data apiKeyResourceModel

	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	apiKey, err := r.client.GetApiKey(data.ID.ValueString())
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to read API key, got error: %s", err))
		return
	}

	data.Name = types.StringValue(apiKey.Name)
	permissions := make([]types.String, len(apiKey.Permissions))
	for i, p := range apiKey.Permissions {
		permissions[i] = types.StringValue(p)
	}
	data.Permissions = permissions

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

func (r *apiKeyResource) Update(ctx context.Context, req resource.UpdateRequest, resp *resource.UpdateResponse) {
	var data apiKeyResourceModel

	resp.Diagnostics.Append(req.Plan.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	permissions := make([]string, len(data.Permissions))
	for i, p := range data.Permissions {
		permissions[i] = p.ValueString()
	}

	updateReq := client.ApiKeyUpdateRequest{
		Name:        data.Name.ValueString(),
		Permissions: permissions,
	}

	_, err := r.client.UpdateApiKey(data.ID.ValueString(), updateReq)
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to update API key, got error: %s", err))
		return
	}

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

func (r *apiKeyResource) Delete(ctx context.Context, req resource.DeleteRequest, resp *resource.DeleteResponse) {
	var data apiKeyResourceModel

	resp.Diagnostics.Append(req.State.Get(ctx, &data)...)

	if resp.Diagnostics.HasError() {
		return
	}

	err := r.client.DeleteApiKey(data.ID.ValueString())
	if err != nil {
		resp.Diagnostics.AddError("Client Error", fmt.Sprintf("Unable to delete API key, got error: %s", err))
		return
	}
}

func (r *apiKeyResource) ImportState(ctx context.Context, req resource.ImportStateRequest, resp *resource.ImportStateResponse) {
	resource.ImportStatePassthroughID(ctx, path.Root("id"), req, resp)
}