using Microsoft.Extensions.Configuration;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Web;
using YY.Admin.Core;
using YY.Admin.Core.Entity;
using YY.Admin.Core.Services;

namespace YY.Admin.Services.Service.MixerMaterial;

public class MixerMaterialService : IMixerMaterialService, ISingletonDependency
{
    private readonly IHttpClientFactory _httpClientFactory;
    private readonly IConfiguration _configuration;
    private readonly ILoggerService _logger;

    private static readonly JsonSerializerOptions _jsonOpts = new()
    {
        PropertyNameCaseInsensitive = true,
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        Converters = { new NullableDateTimeJsonConverter() }
    };

    public MixerMaterialService(
        IHttpClientFactory httpClientFactory,
        IConfiguration configuration,
        ILoggerService logger)
    {
        _httpClientFactory = httpClientFactory;
        _configuration = configuration;
        _logger = logger;
    }

    private string BaseUrl => (_configuration.GetValue<string>("JeecgIntegration:BaseUrl") ?? "http://localhost:8080/jeecg-boot").TrimEnd('/');
    private HttpClient CreateClient() => _httpClientFactory.CreateClient("JeecgApi");

    public async Task<MixerMaterialPageResult> PageAsync(
        int pageNo,
        int pageSize,
        string? materialCode = null,
        string? materialName = null,
        string? erpCode = null,
        string? majorCategoryId = null,
        string? minorCategoryId = null,
        CancellationToken ct = default)
    {
        var query = HttpUtility.ParseQueryString(string.Empty);
        query["pageNo"] = pageNo.ToString();
        query["pageSize"] = pageSize.ToString();
        if (!string.IsNullOrWhiteSpace(materialCode)) query["materialCode"] = materialCode;
        if (!string.IsNullOrWhiteSpace(materialName)) query["materialName"] = materialName;
        if (!string.IsNullOrWhiteSpace(erpCode)) query["erpCode"] = erpCode;
        if (!string.IsNullOrWhiteSpace(majorCategoryId)) query["majorCategoryId"] = majorCategoryId;
        if (!string.IsNullOrWhiteSpace(minorCategoryId)) query["minorCategoryId"] = minorCategoryId;

        var url = $"{BaseUrl}/mes/material/mixerMaterial/anon/list?{query}";
        using var client = CreateClient();
        var resp = await client.GetAsync(url, ct).ConfigureAwait(false);
        resp.EnsureSuccessStatusCode();

        var json = await resp.Content.ReadAsStringAsync(ct).ConfigureAwait(false);
        using var doc = JsonDocument.Parse(json);
        var result = doc.RootElement.GetProperty("result");
        var records = result.GetProperty("records").Deserialize<List<MesMixerMaterial>>(_jsonOpts) ?? new();
        var total = result.TryGetProperty("total", out var totalEl) ? totalEl.GetInt64() : records.Count;
        return new MixerMaterialPageResult(records, total, pageNo, pageSize);
    }

    public async Task<MesMixerMaterial?> GetByIdAsync(string id, CancellationToken ct = default)
    {
        var url = $"{BaseUrl}/mes/material/mixerMaterial/anon/queryById?id={Uri.EscapeDataString(id)}";
        using var client = CreateClient();
        var resp = await client.GetAsync(url, ct).ConfigureAwait(false);
        if (!resp.IsSuccessStatusCode) return null;

        var json = await resp.Content.ReadAsStringAsync(ct).ConfigureAwait(false);
        using var doc = JsonDocument.Parse(json);
        if (!doc.RootElement.TryGetProperty("result", out var resultEl)) return null;
        return resultEl.Deserialize<MesMixerMaterial>(_jsonOpts);
    }

    public Task<bool> AddAsync(MesMixerMaterial material, CancellationToken ct = default)
        => PostJsonAsync($"{BaseUrl}/mes/material/mixerMaterial/anon/add", material, ct);

    public Task<bool> EditAsync(MesMixerMaterial material, CancellationToken ct = default)
        => PostJsonAsync($"{BaseUrl}/mes/material/mixerMaterial/anon/edit", material, ct);

    public async Task<bool> DeleteAsync(string id, CancellationToken ct = default)
    {
        var url = $"{BaseUrl}/mes/material/mixerMaterial/anon/delete?id={Uri.EscapeDataString(id)}";
        using var client = CreateClient();
        var resp = await client.DeleteAsync(url, ct).ConfigureAwait(false);
        return resp.IsSuccessStatusCode && await IsSuccessResultAsync(resp, ct).ConfigureAwait(false);
    }

    public async Task<bool> DeleteBatchAsync(string ids, CancellationToken ct = default)
    {
        var url = $"{BaseUrl}/mes/material/mixerMaterial/anon/deleteBatch?ids={Uri.EscapeDataString(ids)}";
        using var client = CreateClient();
        var resp = await client.DeleteAsync(url, ct).ConfigureAwait(false);
        return resp.IsSuccessStatusCode && await IsSuccessResultAsync(resp, ct).ConfigureAwait(false);
    }

    public async Task<List<KeyValuePair<string, string>>> GetMajorCategoryOptionsAsync(CancellationToken ct = default)
    {
        var url = $"{BaseUrl}/sys/category/anon/loadTreeData?pcode=XSLMES_MATERIAL";
        using var client = CreateClient();
        var resp = await client.GetAsync(url, ct).ConfigureAwait(false);
        if (!resp.IsSuccessStatusCode) return [];
        var json = await resp.Content.ReadAsStringAsync(ct).ConfigureAwait(false);
        using var doc = JsonDocument.Parse(json);
        var arr = doc.RootElement.TryGetProperty("result", out var resultEl) ? resultEl : doc.RootElement;
        return ParseTreeOptions(arr);
    }

    public async Task<List<KeyValuePair<string, string>>> GetMinorCategoryOptionsAsync(string majorCategoryId, CancellationToken ct = default)
    {
        if (string.IsNullOrWhiteSpace(majorCategoryId)) return [];
        var url = $"{BaseUrl}/sys/category/anon/loadTreeData?pid={Uri.EscapeDataString(majorCategoryId)}";
        using var client = CreateClient();
        var resp = await client.GetAsync(url, ct).ConfigureAwait(false);
        if (!resp.IsSuccessStatusCode) return [];
        var json = await resp.Content.ReadAsStringAsync(ct).ConfigureAwait(false);
        using var doc = JsonDocument.Parse(json);
        var arr = doc.RootElement.TryGetProperty("result", out var resultEl) ? resultEl : doc.RootElement;
        return ParseTreeOptions(arr);
    }

    private static List<KeyValuePair<string, string>> ParseTreeOptions(JsonElement root)
    {
        var list = new List<KeyValuePair<string, string>>();
        if (root.ValueKind != JsonValueKind.Array) return list;
        foreach (var item in root.EnumerateArray())
        {
            var text = item.TryGetProperty("title", out var titleEl) ? titleEl.GetString() : null;
            var key = item.TryGetProperty("key", out var keyEl) ? keyEl.GetString() : null;
            if (!string.IsNullOrWhiteSpace(text) && !string.IsNullOrWhiteSpace(key))
            {
                list.Add(new KeyValuePair<string, string>(text!, key!));
            }
        }
        return list;
    }

    private async Task<bool> PostJsonAsync(string url, object body, CancellationToken ct)
    {
        var content = new StringContent(JsonSerializer.Serialize(body, _jsonOpts), Encoding.UTF8, "application/json");
        using var client = CreateClient();
        var resp = await client.PostAsync(url, content, ct).ConfigureAwait(false);
        return resp.IsSuccessStatusCode && await IsSuccessResultAsync(resp, ct).ConfigureAwait(false);
    }

    private static async Task<bool> IsSuccessResultAsync(HttpResponseMessage resp, CancellationToken ct)
    {
        try
        {
            var json = await resp.Content.ReadAsStringAsync(ct).ConfigureAwait(false);
            using var doc = JsonDocument.Parse(json);
            if (doc.RootElement.TryGetProperty("code", out var code))
            {
                return code.GetInt32() == 200;
            }
            if (doc.RootElement.TryGetProperty("success", out var success))
            {
                return success.GetBoolean();
            }
            return true;
        }
        catch
        {
            return true;
        }
    }

    private sealed class NullableDateTimeJsonConverter : JsonConverter<DateTime?>
    {
        private static readonly string[] SupportedFormats =
        [
            "yyyy-MM-dd HH:mm:ss",
            "yyyy-MM-dd HH:mm:ss.fff",
            "yyyy-MM-ddTHH:mm:ss",
            "yyyy-MM-ddTHH:mm:ss.fff",
            "yyyy-MM-ddTHH:mm:ssZ",
            "yyyy-MM-ddTHH:mm:ss.fffZ"
        ];

        public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.Null) return null;
            if (reader.TokenType == JsonTokenType.String)
            {
                var raw = reader.GetString();
                if (string.IsNullOrWhiteSpace(raw)) return null;
                if (DateTime.TryParseExact(raw, SupportedFormats, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.AssumeLocal, out var exact))
                {
                    return exact;
                }
                if (DateTime.TryParse(raw, out var fallback))
                {
                    return fallback;
                }
            }
            throw new JsonException($"无法将 JSON 值转换为 DateTime?，token={reader.TokenType}");
        }

        public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
        {
            if (value.HasValue) writer.WriteStringValue(value.Value.ToString("yyyy-MM-dd HH:mm:ss"));
            else writer.WriteNullValue();
        }
    }
}