namespace TaxBaik.Web.Services.AdminClients;

using System.Text.Json;
using TaxBaik.Domain.Entities;

public interface IConsultingActivityBrowserClient
{
    Task<List<ConsultingActivity>> GetAllAsync(CancellationToken ct = default);
    Task<List<ConsultingActivity>> GetByClientIdAsync(int clientId, CancellationToken ct = default);
    Task<List<ConsultingActivity>> GetPendingFollowupsAsync(CancellationToken ct = default);
    Task<int> CreateAsync(int clientId, string activityType, DateTime activityDate, string description,
        int? consultantId = null, DateTime? nextFollowupDate = null, CancellationToken ct = default);
    Task UpdateAsync(int id, string? outcome = null, DateTime? nextFollowupDate = null, CancellationToken ct = default);
    Task DeleteAsync(int id, CancellationToken ct = default);
}

public class ConsultingActivityBrowserClient(HttpClient httpClient, ITokenStore tokenStore, ILogger<ConsultingActivityBrowserClient> logger)
    : IConsultingActivityBrowserClient
{
    private const string BaseUrl = "/api/consultingactivity";

    private void EnsureAuthHeader()
    {
        if (!string.IsNullOrEmpty(tokenStore.AccessToken))
            httpClient.DefaultRequestHeaders.Authorization = new("Bearer", tokenStore.AccessToken);
        else
            httpClient.DefaultRequestHeaders.Authorization = null;
    }

    public async Task<List<ConsultingActivity>> GetAllAsync(CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            return await httpClient.GetFromJsonAsync<List<ConsultingActivity>>($"{BaseUrl}", ct) ?? [];
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to get consulting activities");
            return [];
        }
    }

    public async Task<List<ConsultingActivity>> GetByClientIdAsync(int clientId, CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            return await httpClient.GetFromJsonAsync<List<ConsultingActivity>>($"{BaseUrl}/client/{clientId}", ct) ?? [];
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to get activities for client {ClientId}", clientId);
            return [];
        }
    }

    public async Task<List<ConsultingActivity>> GetPendingFollowupsAsync(CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            var response = await httpClient.GetFromJsonAsync<JsonElement>($"{BaseUrl}/pending-followups", ct);
            if (response.TryGetProperty("data", out var data))
                return System.Text.Json.JsonSerializer.Deserialize<List<ConsultingActivity>>(data.GetRawText()) ?? [];
            return [];
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to get pending followups");
            return [];
        }
    }

    public async Task<int> CreateAsync(int clientId, string activityType, DateTime activityDate, string description,
        int? consultantId = null, DateTime? nextFollowupDate = null, CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            var request = new { clientId, activityType, activityDate, description, consultantId, nextFollowupDate };
            var response = await httpClient.PostAsJsonAsync(BaseUrl, request, ct);
            response.EnsureSuccessStatusCode();
            var result = await response.Content.ReadFromJsonAsync<JsonElement>(cancellationToken: ct);
            return result.TryGetProperty("id", out var idProp) ? idProp.GetInt32() : 0;
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to create consulting activity");
            return 0;
        }
    }

    public async Task UpdateAsync(int id, string? outcome = null, DateTime? nextFollowupDate = null, CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            var request = new { outcome, nextFollowupDate };
            var response = await httpClient.PutAsJsonAsync($"{BaseUrl}/{id}", request, ct);
            response.EnsureSuccessStatusCode();
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to update consulting activity {Id}", id);
        }
    }

    public async Task DeleteAsync(int id, CancellationToken ct = default)
    {
        try
        {
            EnsureAuthHeader();
            var response = await httpClient.DeleteAsync($"{BaseUrl}/{id}", ct);
            response.EnsureSuccessStatusCode();
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to delete consulting activity {Id}", id);
        }
    }
}