using Elsa.Workflows.Helpers;
using Elsa.Workflows.Runtime.Exceptions;
using Elsa.Workflows.Runtime.Filters;
using Elsa.Workflows.Runtime.Messages;
using Elsa.Workflows.Runtime.Options;
using Microsoft.Extensions.Logging;

namespace Elsa.Workflows.Runtime;

/// <inheritdoc />
[Obsolete("Use WorkflowResumer instead.")]
public class BookmarkResumer(IWorkflowRuntime workflowRuntime, IBookmarkStore bookmarkStore, IStimulusHasher stimulusHasher, ILogger<BookmarkResumer> logger) : IBookmarkResumer
{
    /// <inheritdoc />
    public Task<ResumeBookmarkResult> ResumeAsync<TActivity>(object stimulus, ResumeBookmarkOptions? options = null, CancellationToken cancellationToken = default) where TActivity : IActivity
    {
        return ResumeAsync<TActivity>(stimulus, null, options, cancellationToken);
    }

    /// <inheritdoc />
    public async Task<ResumeBookmarkResult> ResumeAsync<TActivity>(object stimulus, string? workflowInstanceId = null, ResumeBookmarkOptions? options = null, CancellationToken cancellationToken = default) where TActivity : IActivity
    {
        var activityTypeName = ActivityTypeNameHelper.GenerateTypeName<TActivity>();
        var stimulusHash = stimulusHasher.Hash(activityTypeName, stimulus);
        var bookmarkFilter = new BookmarkFilter
        {
            Name = activityTypeName,
            WorkflowInstanceId = workflowInstanceId,
            Hash = stimulusHash,
        };
        return await ResumeAsync(bookmarkFilter, options, cancellationToken);
    }

    /// <inheritdoc />
    public async Task<ResumeBookmarkResult> ResumeAsync(string bookmarkId, IDictionary<string, object> input, CancellationToken cancellationToken = default)
    {
        var bookmarkFilter = new BookmarkFilter
        {
            BookmarkId = bookmarkId
        };
        var options = new ResumeBookmarkOptions
        {
            Input = input
        };
        return await ResumeAsync(bookmarkFilter, options, cancellationToken);
    }

    /// <inheritdoc />
    public async Task<ResumeBookmarkResult> ResumeAsync<TActivity>(string bookmarkId, ResumeBookmarkOptions? options = null, CancellationToken cancellationToken = default) where TActivity : IActivity
    {
        var activityTypeName = ActivityTypeNameHelper.GenerateTypeName<TActivity>();
        var bookmarkFilter = new BookmarkFilter
        {
            Name = activityTypeName,
            BookmarkId = bookmarkId
        };
        return await ResumeAsync(bookmarkFilter, options, cancellationToken);
    }

    public async Task<ResumeBookmarkResult> ResumeAsync(ResumeBookmarkRequest request, CancellationToken cancellationToken = default)
    {
        var runRequest = new RunWorkflowInstanceRequest
        {
            Input = request.Input,
            Properties = request.Properties,
            ActivityHandle = request.ActivityHandle,
            BookmarkId = request.BookmarkId
        };

        var workflowInstanceId = request.WorkflowInstanceId;
        var workflowClient = await workflowRuntime.CreateClientAsync(workflowInstanceId, cancellationToken);
        var response = await workflowClient.RunInstanceAsync(runRequest, cancellationToken);
        return ResumeBookmarkResult.Found(response);
    }

    /// <inheritdoc />
    public async Task<ResumeBookmarkResult> ResumeAsync(BookmarkFilter filter, ResumeBookmarkOptions? options = null, CancellationToken cancellationToken = default)
    {
        var bookmark = await bookmarkStore.FindAsync(filter, cancellationToken);

        if (bookmark == null)
        {
            logger.LogDebug("Bookmark not found in store for filter {@Filter}", filter);
            return ResumeBookmarkResult.NotFound();
        }

        var workflowClient = await workflowRuntime.CreateClientAsync(bookmark.WorkflowInstanceId, cancellationToken);
        var runRequest = new RunWorkflowInstanceRequest
        {
            Input = options?.Input,
            Properties = options?.Properties,
            BookmarkId = bookmark.Id
        };

        try
        {
            var response = await workflowClient.RunInstanceAsync(runRequest, cancellationToken);
            logger.LogDebug("Resumed workflow instance {WorkflowInstanceId} with bookmark {BookmarkId}", bookmark.WorkflowInstanceId, bookmark.Id);
            return ResumeBookmarkResult.Found(response);
        }
        catch (WorkflowInstanceNotFoundException)
        {
            // The workflow instance does not (yet) exist in the DB.
            logger.LogDebug("No workflow instance with ID {WorkflowInstanceId} found for bookmark {BookmarkId} at this time.", bookmark.WorkflowInstanceId, bookmark.Id);
            return ResumeBookmarkResult.NotFound();
        }
    }
}