using FoodLabeling.Application.Contracts.Dtos.LabelTemplate;
using FoodLabeling.Application.Services.DbModels;
using FoodLabeling.Domain.Entities;
using SqlSugar;
using Volo.Abp;
using Volo.Abp.Guids;

namespace FoodLabeling.Application.Helpers;

/// <summary>
/// 标签模板适用 Company / Region / Location：各维度独立 ALL/SPECIFIED + 多选落库。
/// </summary>
public static class LabelTemplateScopeHelper
{
    public const string ScopeAll = "ALL";
    public const string ScopeSpecified = "SPECIFIED";

    public const string AllCompaniesDisplay = "All Companies";
    public const string AllRegionsDisplay = "All Regions";
    public const string AllLocationsDisplay = "All Locations";
    public const string EmptyDisplay = "无";

    public sealed class LabelTemplateScopeSaveResult
    {
        public string AppliedPartnerType { get; init; } = ScopeAll;

        public string AppliedRegionType { get; init; } = ScopeAll;

        public string AppliedLocationType { get; init; } = ScopeAll;

        public List<string> PartnerIds { get; init; } = new();

        public List<string> RegionIds { get; init; } = new();

        public List<string> LocationIds { get; init; } = new();
    }

    public sealed class LabelTemplateScopeDisplay
    {
        public string Company { get; init; } = AllCompaniesDisplay;

        public string Region { get; init; } = AllRegionsDisplay;

        public string Location { get; init; } = AllLocationsDisplay;

        public string AppliedPartnerType { get; init; } = ScopeAll;

        public string AppliedRegionType { get; init; } = ScopeAll;

        public string AppliedLocationType { get; init; } = ScopeAll;

        public List<string> PartnerIds { get; init; } = new();

        public List<string> RegionIds { get; init; } = new();

        public List<string> LocationIds { get; init; } = new();
    }

    /// <summary>
    /// 解析新增/编辑入参中的 Company / Region / Location 范围。
    /// </summary>
    public static async Task<LabelTemplateScopeSaveResult> ResolveScopeForSaveAsync(
        ISqlSugarClient db,
        LabelTemplateCreateInputVo input)
    {
        var partnerIds = NormalizePartnerIds(input);
        var regionIds = NormalizeRegionIds(input);
        var locationIds = MergeExplicitLocationIds(input);

        var partnerType = ResolveDimensionType(
            input.AppliedPartnerType,
            partnerIds,
            input.PartnerIds is not null || input.CompanyIds is not null);
        var regionType = ResolveDimensionType(
            input.AppliedRegionType,
            regionIds,
            input.RegionIds is not null || input.GroupIds is not null);
        var locationType = ResolveDimensionType(
            input.AppliedLocationType,
            locationIds,
            input.LocationIds is not null || input.AppliedLocationIds is not null);

        ValidateDimensionType("Company", partnerType);
        ValidateDimensionType("Region", regionType);
        ValidateDimensionType("Location", locationType);

        if (string.Equals(partnerType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) && partnerIds.Count == 0)
        {
            throw new UserFriendlyException("指定适用 Company 时，partnerIds/companyIds 不能为空");
        }

        if (string.Equals(regionType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) && regionIds.Count == 0)
        {
            throw new UserFriendlyException("指定适用 Region 时，regionIds/groupIds 不能为空");
        }

        if (string.Equals(locationType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) && locationIds.Count == 0)
        {
            throw new UserFriendlyException("指定适用门店时，locationIds/appliedLocationIds 不能为空");
        }

        if (partnerIds.Count > 0)
        {
            await ValidatePartnerIdsExistAsync(db, partnerIds);
        }

        if (regionIds.Count > 0)
        {
            await ValidateRegionIdsExistAsync(db, regionIds);
        }

        if (locationIds.Count > 0)
        {
            await LocationScopeBindingHelper.ValidateLocationIdsExistAsync(db, locationIds);
        }

        var anySpecified = string.Equals(partnerType, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
                           || string.Equals(regionType, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
                           || string.Equals(locationType, ScopeSpecified, StringComparison.OrdinalIgnoreCase);

        if (anySpecified)
        {
            var merged = await LocationScopeBindingHelper.MergeToLocationIdsAsync(
                db,
                string.Equals(partnerType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) ? partnerIds : null,
                string.Equals(regionType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) ? regionIds : null,
                string.Equals(locationType, ScopeSpecified, StringComparison.OrdinalIgnoreCase) ? locationIds : null);
            if (merged.Count == 0)
            {
                throw new UserFriendlyException("指定适用范围后至少需要匹配到一个有效门店");
            }
        }

        return new LabelTemplateScopeSaveResult
        {
            AppliedPartnerType = partnerType,
            AppliedRegionType = regionType,
            AppliedLocationType = locationType,
            PartnerIds = partnerIds,
            RegionIds = regionIds,
            LocationIds = locationIds
        };
    }

    public static async Task SaveTemplateScopeAsync(
        ISqlSugarClient db,
        IGuidGenerator guidGenerator,
        string templateId,
        LabelTemplateScopeSaveResult scope,
        string? currentUserId,
        DateTime now)
    {
        var hasExtendedScope = await LabelTemplateScopeSchemaHelper.HasPartnerRegionScopeTablesAsync(db);

        if (hasExtendedScope)
        {
            await db.Deleteable<FlLabelTemplatePartnerDbEntity>()
                .Where(x => x.TemplateId == templateId)
                .ExecuteCommandAsync();
            await db.Deleteable<FlLabelTemplateRegionDbEntity>()
                .Where(x => x.TemplateId == templateId)
                .ExecuteCommandAsync();
        }

        await db.Deleteable<FlLabelTemplateLocationDbEntity>()
            .Where(x => x.TemplateId == templateId)
            .ExecuteCommandAsync();

        if (hasExtendedScope
            && string.Equals(scope.AppliedPartnerType, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
            && scope.PartnerIds.Count > 0)
        {
            var rows = scope.PartnerIds.Select(pid => new FlLabelTemplatePartnerDbEntity
            {
                Id = guidGenerator.Create().ToString(),
                TemplateId = templateId,
                PartnerId = pid,
                CreationTime = now,
                CreatorId = currentUserId
            }).ToList();
            await db.Insertable(rows).ExecuteCommandAsync();
        }

        if (hasExtendedScope
            && string.Equals(scope.AppliedRegionType, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
            && scope.RegionIds.Count > 0)
        {
            var rows = scope.RegionIds.Select(gid => new FlLabelTemplateRegionDbEntity
            {
                Id = guidGenerator.Create().ToString(),
                TemplateId = templateId,
                GroupId = gid,
                CreationTime = now,
                CreatorId = currentUserId
            }).ToList();
            await db.Insertable(rows).ExecuteCommandAsync();
        }

        if (string.Equals(scope.AppliedLocationType, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
            && scope.LocationIds.Count > 0)
        {
            var rows = scope.LocationIds.Select(locId => new FlLabelTemplateLocationDbEntity
            {
                Id = guidGenerator.Create().ToString(),
                TemplateId = templateId,
                LocationId = locId
            }).ToList();
            await db.Insertable(rows).ExecuteCommandAsync();
        }
    }

    /// <summary>
    /// 批量加载模板适用范围展示与 Id 数组（详情/列表）。
    /// </summary>
    public static async Task<Dictionary<string, LabelTemplateScopeDisplay>> BuildScopeDisplayMapAsync(
        ISqlSugarClient db,
        IReadOnlyList<FlLabelTemplateDbEntity> templates)
    {
        var result = new Dictionary<string, LabelTemplateScopeDisplay>(StringComparer.Ordinal);
        if (templates.Count == 0)
        {
            return result;
        }

        var templateIds = templates.Select(x => x.Id).Distinct(StringComparer.Ordinal).ToList();

        var hasExtendedScope = await LabelTemplateScopeSchemaHelper.HasPartnerRegionScopeTablesAsync(db);

        var partnerLinks = hasExtendedScope
            ? await db.Queryable<FlLabelTemplatePartnerDbEntity>()
                .Where(x => templateIds.Contains(x.TemplateId))
                .ToListAsync()
            : new List<FlLabelTemplatePartnerDbEntity>();
        var regionLinks = hasExtendedScope
            ? await db.Queryable<FlLabelTemplateRegionDbEntity>()
                .Where(x => templateIds.Contains(x.TemplateId))
                .ToListAsync()
            : new List<FlLabelTemplateRegionDbEntity>();
        var locationLinks = await db.Queryable<FlLabelTemplateLocationDbEntity>()
            .Where(x => templateIds.Contains(x.TemplateId))
            .ToListAsync();

        var partnerIdSet = partnerLinks.Select(x => x.PartnerId).Distinct(StringComparer.Ordinal).ToList();
        var regionIdSet = regionLinks.Select(x => x.GroupId).Distinct(StringComparer.Ordinal).ToList();
        var locationIdSet = locationLinks.Select(x => x.LocationId).Distinct(StringComparer.Ordinal).ToList();

        var partnerNameById = new Dictionary<string, string>(StringComparer.Ordinal);
        if (partnerIdSet.Count > 0)
        {
            var partners = await db.Queryable<FlPartnerDbEntity>()
                .Where(x => !x.IsDeleted && partnerIdSet.Contains(x.Id))
                .ToListAsync();
            foreach (var p in partners)
            {
                var name = p.PartnerName?.Trim();
                partnerNameById[p.Id] = string.IsNullOrEmpty(name) ? p.Id : name;
            }
        }

        var regionNameById = new Dictionary<string, string>(StringComparer.Ordinal);
        if (regionIdSet.Count > 0)
        {
            var groups = await db.Queryable<FlGroupDbEntity>()
                .Where(x => !x.IsDeleted && regionIdSet.Contains(x.Id))
                .ToListAsync();
            foreach (var g in groups)
            {
                var name = g.GroupName?.Trim();
                regionNameById[g.Id] = string.IsNullOrEmpty(name) ? g.Id : name;
            }
        }

        var locById = new Dictionary<string, LocationAggregateRoot>(StringComparer.Ordinal);
        if (locationIdSet.Count > 0)
        {
            var guidList = locationIdSet.Where(x => Guid.TryParse(x, out _)).Select(Guid.Parse).ToList();
            if (guidList.Count > 0)
            {
                var locs = await db.Queryable<LocationAggregateRoot>()
                    .Where(x => !x.IsDeleted && guidList.Contains(x.Id))
                    .ToListAsync();
                foreach (var loc in locs)
                {
                    locById[loc.Id.ToString()] = loc;
                }
            }
        }

        foreach (var template in templates)
        {
            var locationType = NormalizeScopeType(template.AppliedLocationType, ScopeAll);

            var pIds = LocationScopeBindingHelper.NormalizeIds(
                partnerLinks.Where(x => x.TemplateId == template.Id).Select(x => x.PartnerId).ToList());
            var rIds = LocationScopeBindingHelper.NormalizeIds(
                regionLinks.Where(x => x.TemplateId == template.Id).Select(x => x.GroupId).ToList());
            var lIds = LocationScopeBindingHelper.NormalizeIds(
                locationLinks.Where(x => x.TemplateId == template.Id).Select(x => x.LocationId).ToList());

            var partnerType = pIds.Count > 0 ? ScopeSpecified : ScopeAll;
            var regionType = rIds.Count > 0 ? ScopeSpecified : ScopeAll;

            if (hasExtendedScope
                && pIds.Count == 0
                && lIds.Count > 0)
            {
                pIds = await LocationScopeBindingHelper.ResolvePartnerIdsFromLocationIdsAsync(db, lIds);
                if (pIds.Count > 0)
                {
                    partnerType = ScopeSpecified;
                }
            }

            if (hasExtendedScope
                && rIds.Count == 0
                && lIds.Count > 0)
            {
                rIds = await LocationScopeBindingHelper.ResolveGroupIdsFromLocationIdsAsync(db, lIds);
                if (rIds.Count > 0)
                {
                    regionType = ScopeSpecified;
                }
            }

            if (lIds.Count == 0 && !string.Equals(locationType, ScopeSpecified, StringComparison.OrdinalIgnoreCase))
            {
                locationType = ScopeAll;
            }
            else if (lIds.Count > 0)
            {
                locationType = ScopeSpecified;
            }

            var companyDisplay = string.Equals(partnerType, ScopeAll, StringComparison.OrdinalIgnoreCase)
                ? AllCompaniesDisplay
                : FormatNames(pIds.Select(id => partnerNameById.TryGetValue(id, out var n) ? n : id));
            var regionDisplay = string.Equals(regionType, ScopeAll, StringComparison.OrdinalIgnoreCase)
                ? AllRegionsDisplay
                : FormatNames(rIds.Select(id => regionNameById.TryGetValue(id, out var n) ? n : id));
            var locationDisplay = string.Equals(locationType, ScopeAll, StringComparison.OrdinalIgnoreCase)
                ? AllLocationsDisplay
                : FormatLocationNames(lIds, locById);

            result[template.Id] = new LabelTemplateScopeDisplay
            {
                Company = companyDisplay,
                Region = regionDisplay,
                Location = locationDisplay,
                AppliedPartnerType = partnerType,
                AppliedRegionType = regionType,
                AppliedLocationType = locationType,
                PartnerIds = pIds,
                RegionIds = rIds,
                LocationIds = lIds
            };
        }

        return result;
    }

    /// <summary>
    /// 列表权限：按当前用户可见门店筛选模板（各维度 AND）。
    /// </summary>
    public static async Task<ISugarQueryable<FlLabelTemplateDbEntity>> ApplyTemplateScopeFilterAsync(
        ISqlSugarClient db,
        ISugarQueryable<FlLabelTemplateDbEntity> query,
        List<string>? scopedLocationIds)
    {
        if (scopedLocationIds is null)
        {
            return query;
        }

        var hasExtendedScope = await LabelTemplateScopeSchemaHelper.HasPartnerRegionScopeTablesAsync(db);

        if (scopedLocationIds.Count == 0)
        {
            return hasExtendedScope
                ? query.Where(t =>
                    t.AppliedLocationType == ScopeAll
                    && !SqlFunc.Subqueryable<FlLabelTemplateLocationDbEntity>()
                        .Where(l => l.TemplateId == t.Id)
                        .Any()
                    && !SqlFunc.Subqueryable<FlLabelTemplatePartnerDbEntity>()
                        .Where(p => p.TemplateId == t.Id)
                        .Any()
                    && !SqlFunc.Subqueryable<FlLabelTemplateRegionDbEntity>()
                        .Where(r => r.TemplateId == t.Id)
                        .Any())
                : query.Where(t =>
                    t.AppliedLocationType == ScopeAll
                    && !SqlFunc.Subqueryable<FlLabelTemplateLocationDbEntity>()
                        .Where(l => l.TemplateId == t.Id)
                        .Any());
        }

        if (!hasExtendedScope)
        {
            return query.Where(t =>
                t.AppliedLocationType == ScopeAll
                || SqlFunc.Subqueryable<FlLabelTemplateLocationDbEntity>()
                    .Where(l => l.TemplateId == t.Id && scopedLocationIds.Contains(l.LocationId))
                    .Any());
        }

        var scopedPartnerIds = await LocationScopeBindingHelper.ResolvePartnerIdsFromLocationIdsAsync(
            db, scopedLocationIds);
        var scopedGroupIds = await LocationScopeBindingHelper.ResolveGroupIdsFromLocationIdsAsync(
            db, scopedLocationIds);

        return query.Where(t =>
            (
                t.AppliedLocationType == ScopeAll
                && !SqlFunc.Subqueryable<FlLabelTemplateLocationDbEntity>()
                    .Where(l => l.TemplateId == t.Id)
                    .Any()
                && !SqlFunc.Subqueryable<FlLabelTemplatePartnerDbEntity>()
                    .Where(p => p.TemplateId == t.Id)
                    .Any()
                && !SqlFunc.Subqueryable<FlLabelTemplateRegionDbEntity>()
                    .Where(r => r.TemplateId == t.Id)
                    .Any()
            )
            || (
                (!SqlFunc.Subqueryable<FlLabelTemplatePartnerDbEntity>()
                     .Where(p => p.TemplateId == t.Id)
                     .Any()
                 || SqlFunc.Subqueryable<FlLabelTemplatePartnerDbEntity>()
                     .Where(p => p.TemplateId == t.Id && scopedPartnerIds.Contains(p.PartnerId))
                     .Any())
                && (!SqlFunc.Subqueryable<FlLabelTemplateRegionDbEntity>()
                        .Where(r => r.TemplateId == t.Id)
                        .Any()
                    || SqlFunc.Subqueryable<FlLabelTemplateRegionDbEntity>()
                        .Where(r => r.TemplateId == t.Id && scopedGroupIds.Contains(r.GroupId))
                        .Any())
                && (t.AppliedLocationType == ScopeAll
                    || SqlFunc.Subqueryable<FlLabelTemplateLocationDbEntity>()
                        .Where(l => l.TemplateId == t.Id && scopedLocationIds.Contains(l.LocationId))
                        .Any())
            ));
    }

    private static string ResolveDimensionType(string? type, List<string> ids, bool hasArrayInPayload)
    {
        if (ids.Count > 0)
        {
            return ScopeSpecified;
        }

        var normalized = (type ?? ScopeAll).Trim().ToUpperInvariant();
        if (hasArrayInPayload && string.Equals(normalized, ScopeAll, StringComparison.OrdinalIgnoreCase))
        {
            return ScopeAll;
        }

        return string.Equals(normalized, ScopeSpecified, StringComparison.OrdinalIgnoreCase)
            ? ScopeSpecified
            : ScopeAll;
    }

    private static void ValidateDimensionType(string label, string type)
    {
        if (type != ScopeAll && type != ScopeSpecified)
        {
            throw new UserFriendlyException($"适用{label}范围不合法（ALL/SPECIFIED）");
        }
    }

    private static string NormalizeScopeType(string? type, string fallback)
    {
        var t = (type ?? fallback).Trim().ToUpperInvariant();
        return t == ScopeSpecified ? ScopeSpecified : ScopeAll;
    }

    public static List<string> NormalizePartnerIds(LabelTemplateCreateInputVo input)
    {
        var merged = new HashSet<string>(StringComparer.Ordinal);
        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.PartnerIds))
        {
            merged.Add(id);
        }

        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.CompanyIds))
        {
            merged.Add(id);
        }

        return merged.OrderBy(x => x, StringComparer.Ordinal).ToList();
    }

    public static List<string> NormalizeRegionIds(LabelTemplateCreateInputVo input)
    {
        var merged = new HashSet<string>(StringComparer.Ordinal);
        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.RegionIds))
        {
            merged.Add(id);
        }

        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.GroupIds))
        {
            merged.Add(id);
        }

        return merged.OrderBy(x => x, StringComparer.Ordinal).ToList();
    }

    public static List<string> MergeExplicitLocationIds(LabelTemplateCreateInputVo input)
    {
        var merged = new HashSet<string>(StringComparer.Ordinal);
        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.LocationIds))
        {
            merged.Add(id);
        }

        foreach (var id in LocationScopeBindingHelper.NormalizeIds(input.AppliedLocationIds))
        {
            merged.Add(id);
        }

        return merged.OrderBy(x => x, StringComparer.Ordinal).ToList();
    }

    private static async Task ValidatePartnerIdsExistAsync(ISqlSugarClient db, List<string> partnerIds)
    {
        if (partnerIds.Count == 0)
        {
            return;
        }

        var count = await db.Queryable<FlPartnerDbEntity>()
            .Where(x => !x.IsDeleted && partnerIds.Contains(x.Id))
            .CountAsync();
        if (count != partnerIds.Count)
        {
            throw new UserFriendlyException("存在无效的 Company（partnerIds/companyIds），请刷新后重试");
        }
    }

    private static async Task ValidateRegionIdsExistAsync(ISqlSugarClient db, List<string> regionIds)
    {
        if (regionIds.Count == 0)
        {
            return;
        }

        var count = await db.Queryable<FlGroupDbEntity>()
            .Where(x => !x.IsDeleted && regionIds.Contains(x.Id))
            .CountAsync();
        if (count != regionIds.Count)
        {
            throw new UserFriendlyException("存在无效的 Region（regionIds/groupIds），请刷新后重试");
        }
    }

    private static string FormatNames(IEnumerable<string> names)
    {
        var list = names
            .Select(x => x?.Trim())
            .Where(x => !string.IsNullOrEmpty(x))
            .Distinct(StringComparer.OrdinalIgnoreCase)
            .OrderBy(x => x, StringComparer.OrdinalIgnoreCase)
            .ToList();
        return list.Count > 0 ? string.Join(", ", list) : EmptyDisplay;
    }

    private static string FormatLocationNames(
        List<string> locationIds,
        Dictionary<string, LocationAggregateRoot> locById)
    {
        var names = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
        foreach (var lid in locationIds)
        {
            if (!locById.TryGetValue(lid, out var loc))
            {
                continue;
            }

            var locName = loc.LocationName?.Trim();
            if (string.IsNullOrEmpty(locName))
            {
                locName = loc.LocationCode?.Trim();
            }

            if (!string.IsNullOrEmpty(locName))
            {
                names.Add(locName);
            }
        }

        return names.Count > 0
            ? string.Join(", ", names.OrderBy(x => x, StringComparer.OrdinalIgnoreCase))
            : EmptyDisplay;
    }
}