using System.Net.Http.Json;
using System.Text.Json;
using System.Text.Json.Nodes;
using FsToolbox.Cli.Helper;
using NLog;

namespace FsToolbox.Cli.Tasks
{
    public static partial class StoreTasks
    {
        private static readonly Logger Logger = LoggingService.GetLogger(nameof(StoreTasks));

        #region Public Method GetPickupsAsync

        /// <summary>
        ///     Retrieves all pickups for the specified store with authentication handled automatically.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier to query.</param>
        /// <returns>A list of pickups, or an empty list when no data is available.</returns>
        public static async Task<List<Pickup>> GetPickupsAsync(HttpClient httpClient, int storeId)
        {
            await AuthHelper.EnsureAuthenticationAsync(httpClient);

            var uri = string.Format(Endpoints.StorePickups, storeId);
            var response = await httpClient.GetAsync(uri);
            var responseBody = await response.Content.ReadAsStringAsync();

            // handle unsuccessful response
            if (!response.IsSuccessStatusCode) Logger.Error("Pickup retrieval failed ({Status} {Reason}): {Body}", (int)response.StatusCode, response.ReasonPhrase, responseBody);

            var root = JsonNode.Parse(responseBody);
            if (root == null) return [];

            // Deserialize JsonNode to List<Pickup>
            var opts = new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                PropertyNamingPolicy = null // <── WICHTIG
            };

            return root["pickups"].Deserialize<List<Pickup>>(opts) ?? [];
        }

        #endregion

        #region Public Method GetStoreMembersAsync

        /// <summary>
        ///     Retrieves the members of the specified store, requiring authentication before the request.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier to query.</param>
        /// <returns>A list of store members, or an empty list when the call fails.</returns>
        public static async Task<List<Member>> GetStoreMembersAsync(HttpClient httpClient, int storeId)
        {
            await AuthHelper.EnsureAuthenticationAsync(httpClient);

            var uri = string.Format(Endpoints.StoreMembers, storeId);
            var response = await httpClient.GetAsync(uri);
            var responseBody = await response.Content.ReadAsStringAsync();

            // handle unsuccessful response
            if (!response.IsSuccessStatusCode)
            {
                Logger.Error("Store members retrieval failed ({Status} {Reason}): {Body}", (int)response.StatusCode, response.ReasonPhrase, responseBody);
                return [];
            }

            var root = JsonNode.Parse(responseBody);
            if (root == null) return [];

            // Deserialize JsonNode to List<Pickup>
            var opts = new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                PropertyNamingPolicy = null // <── WICHTIG
            };

            return root.Deserialize<List<Member>>(opts) ?? [];
        }

        #endregion

        #region Public Method GetStoreInformationAsync

        /// <summary>
        ///     Retrieves store information including the calendar interval.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier to query.</param>
        /// <returns>The store information, or null when the call fails.</returns>
        public static async Task<StoreInformation?> GetStoreInformationAsync(HttpClient httpClient, int storeId)
        {
            await AuthHelper.EnsureAuthenticationAsync(httpClient);

            var uri = string.Format(Endpoints.StoreInformation, storeId);
            var response = await httpClient.GetAsync(uri);
            var responseBody = await response.Content.ReadAsStringAsync();

            if (!response.IsSuccessStatusCode)
            {
                Logger.Error("Store information retrieval failed ({Status} {Reason}): {Body}", (int)response.StatusCode, response.ReasonPhrase, responseBody);
                return null;
            }

            var opts = new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                PropertyNamingPolicy = null
            };

            try
            {
                return JsonSerializer.Deserialize<StoreInformation>(responseBody, opts);
            }
            catch (JsonException ex)
            {
                Logger.Error(ex, "Failed to parse store information response.");
                return null;
            }
        }

        #endregion

        #region Public Method GetStoreLogAsync

        /// <summary>
        ///     Retrieves the store log for a specified store and date range.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier to query.</param>
        /// <param name="fromDate">Start date (formatted for the API).</param>
        /// <param name="toDate">End date (formatted for the API).</param>
        /// <param name="storeLogActionIds">Comma-separated action IDs.</param>
        /// <returns>The raw response body from the API.</returns>
        public static async Task<string> GetStoreLogAsync(HttpClient httpClient, int storeId, string fromDate, string toDate, string storeLogActionIds)
        {
            await AuthHelper.EnsureAuthenticationAsync(httpClient);

            var uri = string.Format(Endpoints.StoreLog, storeId, fromDate, toDate, storeLogActionIds);
            var response = await httpClient.GetAsync(uri);
            var responseBody = await response.Content.ReadAsStringAsync();

            // handle unsuccessful response
            if (!response.IsSuccessStatusCode)
                Logger.Error("Store log retrieval failed ({Status} {Reason}): {Body}", (int)response.StatusCode, response.ReasonPhrase, responseBody);

            return responseBody;
        }

        #endregion

        #region Public Method GetStoreLogEntriesAsync

        /// <summary>
        ///     Retrieves and deserializes store log entries for a specified store and date range.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier to query.</param>
        /// <param name="fromDate">Start date (formatted for the API).</param>
        /// <param name="toDate">End date (formatted for the API).</param>
        /// <param name="storeLogActionIds">Comma-separated action IDs.</param>
        /// <returns>A list of store log entries, or an empty list when parsing fails.</returns>
        public static async Task<List<StoreLogEntry>> GetStoreLogEntriesAsync(HttpClient httpClient, int storeId, string fromDate, string toDate, string storeLogActionIds)
        {
            var responseBody = await GetStoreLogAsync(httpClient, storeId, fromDate, toDate, storeLogActionIds);

            var opts = new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                PropertyNamingPolicy = null
            };

            try
            {
                return JsonSerializer.Deserialize<List<StoreLogEntry>>(responseBody, opts) ?? [];
            }
            catch (JsonException ex)
            {
                Logger.Error(ex, "Failed to parse store log response.");
                return [];
            }
        }

        #endregion

        #region Public Method PatchPickupAsync

        /// <summary>
        ///     Marks a pickup slot as confirmed for the specified store, date, and user.
        /// </summary>
        /// <param name="httpClient">The HTTP client used to send the request.</param>
        /// <param name="storeId">The store identifier containing the pickup.</param>
        /// <param name="pickupDate">The date of the pickup to patch.</param>
        /// <param name="fsId">The Foodsharing user identifier associated with the slot.</param>
        /// <returns>A task representing the asynchronous operation.</returns>
        public static async Task PatchPickupAsync(HttpClient httpClient, int storeId, string pickupDate, int fsId)
        {
            await AuthHelper.EnsureAuthenticationAsync(httpClient);

            var uri = string.Format(Endpoints.StorePickupsSlot, storeId, pickupDate, fsId);
            var payload = new JsonObject
            {
                ["isConfirmed"] = true
            };
            var response = await httpClient.PatchAsync(uri, JsonContent.Create(payload));
            var responseBody = await response.Content.ReadAsStringAsync();

            // handle unsuccessful response
            if (!response.IsSuccessStatusCode)
                Logger.Error("Pickup patch failed ({Status} {Reason}): {Body}", (int)response.StatusCode, response.ReasonPhrase, responseBody);
            else
                Logger.Info("Pickup patch succeeded {FsId} on {PickupDate}", fsId, pickupDate);
        }

        #endregion
    }
}