using Microsoft.Extensions.Logging;
using QYZH.InteractiveMagazine.IService;
using QYZH.InteractiveMagazine.Models.Common;
using QYZH.InteractiveMagazine.Models.Dto;
using QYZH.InteractiveMagazine.Models.Entity;
using QYZH.InteractiveMagazine.Repository;
using SqlSugar;

namespace QYZH.InteractiveMagazine.Service;

/// <summary>
/// 勋章服务实现
/// </summary>
public class MedalService(BaseRepository<Medal> medalRepository, ILogger<MedalService> logger) : BaseRepository<Medal>, IMedalService
{

    /// <summary>
    /// 创建勋章（含规则，事务）
    /// </summary>
    public async Task<MedalOutput> CreateAsync(MedalInput input)
    {
        logger.LogInformation("正在创建勋章，勋章名称: {Name}", input.Name);

        if (string.IsNullOrWhiteSpace(input.Name))
        {
            throw new BusinessException("勋章名称不能为空", 400);
        }

        if (string.IsNullOrWhiteSpace(input.Type))
        {
            throw new BusinessException("勋章类型不能为空", 400);
        }

        var medal = new Medal
        {
            Name = input.Name.Trim(),
            Description = input.Description,
            ImageUrl = input.ImageUrl,
            SortOrder = input.SortOrder,
            Type = input.Type,
            JournalId = input.JournalId,
            CreatedBy = "System",
            UpdatedBy = "System",
            CreatedAt = DateTime.Now,
            UpdatedAt = DateTime.Now,
            IsDeleted = false
        };

        try
        {
            await UseTranAsync(async () =>
            {
                var result = await medalRepository.InsertAsync(medal);
                if (!result)
                {
                    throw new BusinessException("创建勋章失败", 500);
                }

                if (input.Rules != null && input.Rules.Count > 0)
                {
                    await InsertRulesAsync(medal.Id, input.Rules);
                }
            });
        }
        catch (BusinessException)
        {
            throw;
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "勋章创建事务失败，勋章名称: {Name}", input.Name);
            throw new BusinessException("创建勋章失败", 500);
        }

        logger.LogInformation("勋章创建成功，勋章名称: {Name}, ID: {Id}", input.Name, medal.Id);

        var rules = await GetRulesByMedalIdAsync(medal.Id);
        return BuildMedalOutput(medal, rules);
    }

    /// <summary>
    /// 更新勋章（含规则，事务）
    /// </summary>
    public async Task<MedalOutput> UpdateAsync(long id, MedalInput input)
    {
        logger.LogInformation("正在更新勋章，ID: {Id}", id);

        var medal = await medalRepository.GetByIdAsync(id);
        if (medal == null)
        {
            logger.LogWarning("未找到要更新的勋章，ID: {Id}", id);
            throw new BusinessException("勋章不存在", 404);
        }

        if (string.IsNullOrWhiteSpace(input.Name))
        {
            throw new BusinessException("勋章名称不能为空", 400);
        }

        if (string.IsNullOrWhiteSpace(input.Type))
        {
            throw new BusinessException("勋章类型不能为空", 400);
        }

        medal.Name = input.Name.Trim();
        medal.Description = input.Description;
        medal.ImageUrl = input.ImageUrl;
        medal.SortOrder = input.SortOrder;
        medal.Type = input.Type;
        medal.JournalId = input.JournalId;
        medal.UpdatedBy = "System";
        medal.UpdatedAt = DateTime.Now;

        try
        {
            await UseTranAsync(async () =>
            {
                var result = await medalRepository.UpdateAsync(medal);
                if (!result)
                {
                    throw new BusinessException("更新勋章失败", 500);
                }

                // 删除旧规则，重新插入新规则
                await Context.Updateable<MedalRule>()
                    .SetColumns(r => new MedalRule { IsDeleted = true, UpdatedBy = "System", UpdatedAt = DateTime.Now })
                    .Where(r => r.MedalId == medal.Id)
                    .ExecuteCommandAsync();

                if (input.Rules != null && input.Rules.Count > 0)
                {
                    await InsertRulesAsync(medal.Id, input.Rules);
                }
            });
        }
        catch (BusinessException)
        {
            throw;
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "勋章更新事务失败，ID: {Id}", id);
            throw new BusinessException("更新勋章失败", 500);
        }

        logger.LogInformation("勋章更新成功，ID: {Id}", id);

        var rules = await GetRulesByMedalIdAsync(medal.Id);
        return BuildMedalOutput(medal, rules);
    }

    /// <summary>
    /// 删除勋章（软删除，含规则）
    /// </summary>
    public async Task DeleteAsync(long id)
    {
        logger.LogInformation("正在删除勋章，ID: {Id}", id);

        var medal = await medalRepository.GetByIdAsync(id);
        if (medal == null)
        {
            logger.LogWarning("未找到要删除的勋章，ID: {Id}", id);
            throw new BusinessException("勋章不存在", 404);
        }

        try
        {
            await UseTranAsync(async () =>
            {
                var result = await medalRepository.DeleteByIdAsync(id);
                if (!result)
                {
                    throw new BusinessException("删除勋章失败", 500);
                }

                // 同时软删除关联规则
                await Context.Updateable<MedalRule>()
                    .SetColumns(r => new MedalRule { IsDeleted = true, UpdatedBy = "System", UpdatedAt = DateTime.Now })
                    .Where(r => r.MedalId == id)
                    .ExecuteCommandAsync();
            });
        }
        catch (BusinessException)
        {
            throw;
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "勋章删除事务失败，ID: {Id}", id);
            throw new BusinessException("删除勋章失败", 500);
        }

        logger.LogInformation("勋章删除成功，ID: {Id}", id);
    }

    /// <summary>
    /// 根据ID获取勋章（含规则）
    /// </summary>
    public async Task<MedalOutput> GetByIdAsync(long id)
    {
        logger.LogInformation("正在获取勋章信息，ID: {Id}", id);

        var medal = await medalRepository.GetByIdAsync(id);
        if (medal == null)
        {
            logger.LogWarning("未找到勋章，ID: {Id}", id);
            throw new BusinessException("勋章不存在", 404);
        }

        var rules = await GetRulesByMedalIdAsync(medal.Id);
        return BuildMedalOutput(medal, rules);
    }

    /// <summary>
    /// 分页查询勋章列表（含规则）
    /// </summary>
    public async Task<PageListModel<MedalOutput>> GetListAsync(MedalQueryInput input)
    {
        logger.LogInformation("正在查询勋章列表，页码: {PageIndex}, 每页条数: {PageSize}", input.PageIndex, input.PageSize);

        if (input.PageIndex <= 0)
        {
            throw new BusinessException("页码必须大于0", 400);
        }

        if (input.PageSize <= 0 || input.PageSize > 100)
        {
            throw new BusinessException("每页条数必须在1-100之间", 400);
        }

        RefAsync<int> totalNumber = 0;
        var medals = await medalRepository.Queryable()
                .WhereIF(!string.IsNullOrWhiteSpace(input.Name), m => m.Name.Contains(input.Name))
                .WhereIF(!string.IsNullOrWhiteSpace(input.Type), m => m.Type == input.Type)
                .OrderBy(m => m.SortOrder)
                .OrderByDescending(m => m.CreatedAt)
                .ToPageListAsync(input.PageIndex, input.PageSize, totalNumber);

        // 批量查询所有勋章的规则
        var medalIds = medals.Select(m => m.Id).ToList();
        var allRules = await Context.Queryable<MedalRule>()
            .Where(r => medalIds.Contains(r.MedalId) && !r.IsDeleted)
            .ToListAsync();

        var rulesDict = allRules.GroupBy(r => r.MedalId)
            .ToDictionary(g => g.Key, g => g.OrderBy(r => r.RuleOrder).Select(r => MapRuleOutput(r)).ToList());

        var pageResult = medals.Select(m => BuildMedalOutput(m, rulesDict.GetValueOrDefault(m.Id))).ToList();

        var result = new PageListModel<MedalOutput>(new List<MedalOutput>(), input.PageIndex, input.PageSize, totalNumber);
        result.Result = pageResult;
        return result;
    }

    /// <summary>
    /// 更新勋章启用/禁用状态
    /// </summary>
    public async Task UpdateStatusAsync(long id, int status)
    {
        logger.LogInformation("正在更新勋章状态，ID: {Id}, Status: {Status}", id, status);

        if (status != 0 && status != 1)
        {
            throw new BusinessException("状态值无效，只能为0(禁用)或1(启用)", 400);
        }

        var medal = await medalRepository.GetByIdAsync(id);
        if (medal == null)
        {
            logger.LogWarning("未找到要更新状态的勋章，ID: {Id}", id);
            throw new BusinessException("勋章不存在", 404);
        }

        medal.Status = status;
        medal.UpdatedBy = "System";
        medal.UpdatedAt = DateTime.Now;

        var result = await medalRepository.UpdateAsync(medal);
        if (!result)
        {
            logger.LogError("勋章状态更新失败，ID: {Id}", id);
            throw new BusinessException("更新勋章状态失败", 500);
        }

        logger.LogInformation("勋章状态更新成功，ID: {Id}, Status: {Status}", id, status);
    }

    /// <summary>
    /// 获取勋章的规则列表
    /// </summary>
    public async Task<List<MedalRuleOutput>> GetRulesByMedalIdAsync(long medalId)
    {
        var rules = await Context.Queryable<MedalRule>()
            .Where(r => r.MedalId == medalId && !r.IsDeleted)
            .OrderBy(r => r.RuleOrder)
            .ToListAsync();

        return rules.Select(r => MapRuleOutput(r)).ToList();
    }

    /// <summary>
    /// 获取所有启用勋章列表（含当前用户拥有状态）
    /// </summary>
    public async Task<List<WxMedalListOutput>> GetAllMedalsAsync(long userId)
    {
        logger.LogInformation("正在获取所有勋章列表，用户ID: {UserId}", userId);

        var medals = await medalRepository.Queryable()
            .Where(m => m.Status == 1)
            .OrderBy(m => m.SortOrder)
            .OrderByDescending(m => m.CreatedAt)
            .ToListAsync();

        var userMedals = await Context.Queryable<UserMedal>()
            .Where(um => um.UserId == userId && um.Status == "Awarded")
            .ToListAsync();

        var userMedalDict = userMedals.ToDictionary(um => um.MedalId, um => um.AwardedAt);

        return medals.Select(m => new WxMedalListOutput
        {
            Id = m.Id,
            Name = m.Name,
            Description = m.Description,
            ImageUrl = m.ImageUrl,
            SortOrder = m.SortOrder,
            Type = m.Type,
            IsOwned = userMedalDict.ContainsKey((int)m.Id),
            AwardedAt = userMedalDict.TryGetValue((int)m.Id, out var awardedAt) ? awardedAt : null
        }).ToList();
    }

    /// <summary>
    /// 获取用户已拥有的勋章列表
    /// </summary>
    public async Task<List<WxUserMedalOutput>> GetUserMedalsAsync(long userId)
    {
        logger.LogInformation("正在获取用户勋章列表，用户ID: {UserId}", userId);

        var result = await Context.Queryable<UserMedal>()
            .InnerJoin<Medal>((um, m) => um.MedalId == m.Id)
            .Where((um, m) => um.UserId == userId && um.Status == "Awarded")
            .OrderByDescending((um, m) => um.AwardedAt)
            .Select((um, m) => new WxUserMedalOutput
            {
                MedalId = m.Id,
                Name = m.Name,
                Description = m.Description,
                ImageUrl = m.ImageUrl,
                Type = m.Type,
                AwardedAt = um.AwardedAt,
                Status = um.Status
            })
            .ToListAsync();

        return result;
    }

    /// <summary>
    /// 激活/获得勋章
    /// </summary>
    public async Task ActivateMedalAsync(long userId, WxMedalActivateInput input)
    {
        logger.LogInformation("用户正在激活勋章，用户ID: {UserId}, 勋章ID: {MedalId}", userId, input.MedalId);

        if (input.MedalId <= 0)
        {
            throw new BusinessException("勋章ID无效", 400);
        }

        var medal = await medalRepository.GetByIdAsync(input.MedalId);
        if (medal == null)
        {
            logger.LogWarning("未找到要激活的勋章，勋章ID: {MedalId}", input.MedalId);
            throw new BusinessException("勋章不存在", 404);
        }

        if (medal.Status != 1)
        {
            throw new BusinessException("该勋章当前不可获得", 400);
        }

        var existingUserMedal = await Context.Queryable<UserMedal>()
            .Where(um => um.UserId == userId && um.MedalId == (int)input.MedalId && um.Status == "Awarded")
            .FirstAsync();

        if (existingUserMedal != null)
        {
            throw new BusinessException("您已拥有该勋章", 400);
        }

        var userMedal = new UserMedal
        {
            UserId = userId,
            MedalId = (int)input.MedalId,
            AwardedAt = DateTime.Now,
            Type = medal.Type,
            Status = "Awarded",
            CreatedBy = "System",
            UpdatedBy = "System",
            CreatedAt = DateTime.Now,
            UpdatedAt = DateTime.Now,
            IsDeleted = false
        };

        var insertResult = await Context.Insertable(userMedal).ExecuteCommandAsync();
        if (insertResult <= 0)
        {
            logger.LogError("勋章激活失败，用户ID: {UserId}, 勋章ID: {MedalId}", userId, input.MedalId);
            throw new BusinessException("激活勋章失败", 500);
        }

        logger.LogInformation("勋章激活成功，用户ID: {UserId}, 勋章ID: {MedalId}", userId, input.MedalId);
    }

    #region 私有辅助方法

    /// <summary>
    /// 批量插入规则
    /// </summary>
    private async Task InsertRulesAsync(long medalId, List<MedalRuleInput> ruleInputs)
    {
        var rules = ruleInputs.Select(r => new MedalRule
        {
            MedalId = medalId,
            TargetTable = r.TargetTable,
            TargetField = r.TargetField,
            Operator = r.Operator,
            ThresholdValue = r.ThresholdValue,
            FilterCondition = r.FilterCondition,
            DateRangeType = r.DateRangeType,
            DateRangeStart = r.DateRangeStart,
            DateRangeEnd = r.DateRangeEnd,
            LogicOperator = r.LogicOperator,
            RuleOrder = r.RuleOrder,
            Description = r.Description,
            CreatedBy = "System",
            UpdatedBy = "System",
            CreatedAt = DateTime.Now,
            UpdatedAt = DateTime.Now,
            IsDeleted = false
        }).ToList();

        var count = await Context.Insertable(rules).ExecuteCommandAsync();
        if (count <= 0)
        {
            logger.LogError("勋章规则插入失败，MedalId: {MedalId}", medalId);
            throw new BusinessException("创建勋章规则失败", 500);
        }

        logger.LogInformation("勋章规则创建成功，MedalId: {MedalId}, 规则数: {Count}", medalId, rules.Count);
    }

    /// <summary>
    /// 构建MedalOutput
    /// </summary>
    private static MedalOutput BuildMedalOutput(Medal medal, List<MedalRuleOutput>? rules)
    {
        return new MedalOutput
        {
            Id = medal.Id,
            Name = medal.Name,
            Description = medal.Description,
            ImageUrl = medal.ImageUrl,
            SortOrder = medal.SortOrder,
            Type = medal.Type,
            JournalId = medal.JournalId,
            Rules = rules,
            CreatedBy = medal.CreatedBy,
            CreatedAt = medal.CreatedAt,
            UpdatedBy = medal.UpdatedBy,
            UpdatedAt = medal.UpdatedAt
        };
    }

    /// <summary>
    /// 映射规则实体到输出DTO
    /// </summary>
    private static MedalRuleOutput MapRuleOutput(MedalRule r)
    {
        return new MedalRuleOutput
        {
            Id = r.Id,
            MedalId = r.MedalId,
            TargetTable = r.TargetTable,
            TargetField = r.TargetField,
            Operator = r.Operator,
            ThresholdValue = r.ThresholdValue,
            FilterCondition = r.FilterCondition,
            DateRangeType = r.DateRangeType,
            DateRangeStart = r.DateRangeStart,
            DateRangeEnd = r.DateRangeEnd,
            LogicOperator = r.LogicOperator,
            RuleOrder = r.RuleOrder,
            Description = r.Description,
            CreatedAt = r.CreatedAt,
            UpdatedAt = r.UpdatedAt
        };
    }

    #endregion
}