using Admin.NET.Plugin.AiDOP.Entity.DataPlatform;
using Microsoft.Extensions.Logging;

namespace Admin.NET.Plugin.AiDOP.DataPlatform;

/// <summary>数据源配置 API（供配置中心 sources 页读取与保存）。</summary>
[ApiDescriptionSettings(Order = 324, Description = "数据中台数据源")]
[Route("api/DataPlatform")]
[NonUnify]
public class MdpSourceConfigService : IDynamicApiController, ITransient
{
    private readonly ISqlSugarClient _db;
    private readonly UserManager _user;
    private readonly MdpSourceScopeFactory _scopes;
    private readonly MdpSourcePasswordResolver _passwords;
    private readonly ILogger<MdpSourceConfigService> _logger;

    public MdpSourceConfigService(
        ISqlSugarClient db,
        UserManager user,
        MdpSourceScopeFactory scopes,
        MdpSourcePasswordResolver passwords,
        ILogger<MdpSourceConfigService> logger)
    {
        _db = db;
        _user = user;
        _scopes = scopes;
        _passwords = passwords;
        _logger = logger;
    }

    [DisplayName("数据源列表")]
    [HttpGet("sources")]
    public async Task<object> GetList([FromQuery] string? keyword, [FromQuery] string? type)
    {
        var q = _db.Queryable<MdpSource>();
        if (!_user.SuperAdmin && !_user.SysAdmin)
            q = q.Where(x => x.TenantId == _user.TenantId);
        if (!string.IsNullOrWhiteSpace(keyword))
        {
            var kw = keyword.Trim();
            q = q.Where(x => x.SourceCode.Contains(kw) || x.SourceName.Contains(kw));
        }
        if (!string.IsNullOrWhiteSpace(type))
            q = q.Where(x => x.SourceType == type.Trim());

        var list = await q.OrderBy(x => x.SourceCode).ToListAsync();
        return new
        {
            list = list.Select(x => new
            {
                id = x.Id,
                sourceCode = x.SourceCode,
                systemCode = string.IsNullOrWhiteSpace(x.SystemCode) ? x.SourceCode : x.SystemCode,
                connMode = string.IsNullOrWhiteSpace(x.ConnMode) ? "EXTERNAL" : x.ConnMode,
                sourceName = x.SourceName,
                sourceType = x.SourceType,
                status = x.Status,
                direction = string.Equals(x.SourceType, "API", StringComparison.OrdinalIgnoreCase) ? "拉取"
                    : string.Equals(x.SourceType, "FILE_EXCEL", StringComparison.OrdinalIgnoreCase) ? "文件入站" : "入站",
                dbType = x.DbType ?? "-",
                dbHost = x.DbHost,
                dbPort = x.DbPort,
                dbName = x.DbName,
                dbUser = x.DbUser,
                apiBaseUrl = x.ApiBaseUrl,
                host = string.Equals(x.SourceType, "API", StringComparison.OrdinalIgnoreCase)
                    ? (x.ApiBaseUrl ?? "-")
                    : string.Equals(x.SourceType, "FILE_EXCEL", StringComparison.OrdinalIgnoreCase)
                        ? "-"
                        : $"{x.DbHost}/{x.DbName}",
                health = string.Equals(x.SourceType, "FILE_EXCEL", StringComparison.OrdinalIgnoreCase)
                    ? (string.IsNullOrWhiteSpace(x.SourceCode) ? "配置异常" : "可用")
                    : x.HealthStatus switch
                {
                    1 => "正常",
                    0 => "异常",
                    _ => "未知"
                },
                healthType = x.HealthStatus switch
                {
                    1 => "success",
                    0 => "danger",
                    _ => "info"
                },
                lastCheck = x.LastHealthCheck?.ToString("yyyy-MM-dd HH:mm:ss") ?? "-",
                healthMsg = x.HealthMsg,
                dbExtraParams = x.DbExtraParams,
                remark = x.Remark,
                secretSource = string.Equals(x.SourceType, "DB", StringComparison.OrdinalIgnoreCase)
                    ? _passwords.Classify(x.SourceCode, x.DbPasswordEnc)
                    : null
            })
        };
    }

    [DisplayName("新建或更新数据源")]
    [HttpPost("sources")]
    public async Task<object> Save([FromBody] MdpSourceSaveInput input)
    {
        if (string.IsNullOrWhiteSpace(input.SourceCode) || string.IsNullOrWhiteSpace(input.SourceName) || string.IsNullOrWhiteSpace(input.SourceType))
            throw Oops.Oh("sourceCode、sourceName、sourceType 必填");
        var code = input.SourceCode.Trim();
        var tenantId = _user.TenantId;
        var mode = string.IsNullOrWhiteSpace(input.ConnMode) ? "EXTERNAL" : input.ConnMode.Trim().ToUpperInvariant();
        if (mode is not ("SELF" or "EXTERNAL"))
            throw Oops.Oh("connMode 只能是 SELF 或 EXTERNAL");
        if (tenantId == 0)
            throw Oops.Oh("系统种子来源只能由迁移脚本维护");
        var sourceType = input.SourceType.Trim();
        ValidateDbSource(input, sourceType, mode);
        var existing = await _db.Queryable<MdpSource>()
            .Where(x => x.TenantId == tenantId && x.SourceCode == code)
            .FirstAsync();
        if (existing == null)
        {
            await _db.Insertable(new MdpSource
            {
                TenantId = tenantId,
                SourceCode = code,
                SourceName = input.SourceName.Trim(),
                SourceType = sourceType,
                SystemCode = input.SystemCode?.Trim(),
                ConnMode = mode,
                Status = 1,
                DbType = NormalizeDbType(input.DbType),
                DbHost = mode == "SELF" ? null : input.DbHost?.Trim(),
                DbPort = mode == "SELF" ? null : input.DbPort,
                DbName = mode == "SELF" ? null : input.DbName?.Trim(),
                DbUser = mode == "SELF" ? null : input.DbUser?.Trim(),
                DbPasswordEnc = mode == "SELF" ? null : EncryptPassword(input.DbPassword),
                DbExtraParams = mode == "SELF" ? null : MdpSourceScopeFactory.SanitizeStoredExtra(input.DbType, input.DbExtraParams),
                ApiBaseUrl = input.ApiBaseUrl?.Trim(),
                Remark = input.Remark?.Trim(),
                CreateTime = DateTime.Now,
                UpdateTime = DateTime.Now
            }).ExecuteCommandAsync();
        }
        else
        {
            if (existing.TenantId == 0)
                throw Oops.Oh("系统种子来源只能由迁移脚本维护");
            existing.SourceName = input.SourceName.Trim();
            existing.SourceType = sourceType;
            existing.SystemCode = input.SystemCode?.Trim();
            existing.ConnMode = mode;
            existing.DbType = NormalizeDbType(input.DbType);
            existing.DbHost = mode == "SELF" ? null : input.DbHost?.Trim();
            existing.DbPort = mode == "SELF" ? null : input.DbPort;
            existing.DbName = mode == "SELF" ? null : input.DbName?.Trim();
            existing.DbUser = mode == "SELF" ? null : input.DbUser?.Trim();
            if (mode == "SELF")
                existing.DbPasswordEnc = null;
            else if (!string.IsNullOrEmpty(input.DbPassword))
                existing.DbPasswordEnc = EncryptPassword(input.DbPassword);
            existing.DbExtraParams = mode == "SELF" ? null : MdpSourceScopeFactory.SanitizeStoredExtra(input.DbType, input.DbExtraParams);
            existing.ApiBaseUrl = input.ApiBaseUrl?.Trim();
            existing.Remark = input.Remark?.Trim();
            existing.UpdateTime = DateTime.Now;
            await _db.Updateable(existing).ExecuteCommandAsync();
        }
        return new { sourceCode = code };
    }

    private static void ValidateDbSource(MdpSourceSaveInput input, string sourceType, string mode)
    {
        if (!string.Equals(sourceType, "DB", StringComparison.OrdinalIgnoreCase))
            return;
        var dbType = NormalizeDbType(input.DbType);
        if (!MdpDbSyncRules.IsSupportedDbType(dbType))
            throw Oops.Oh("数据库类型只支持 SQLSERVER 或 MYSQL");
        if (mode == "EXTERNAL" && (string.IsNullOrWhiteSpace(input.DbHost) || input.DbPort is null or <= 0
            || string.IsNullOrWhiteSpace(input.DbName) || string.IsNullOrWhiteSpace(input.DbUser)))
            throw Oops.Oh("外部数据库必须填写主机、端口、库名和账号");
    }

    private static string? NormalizeDbType(string? dbType) =>
        string.IsNullOrWhiteSpace(dbType) ? null : dbType.Trim().ToUpperInvariant();

    private static string? EncryptPassword(string? password) =>
        string.IsNullOrEmpty(password) ? null : CryptogramUtil.Encrypt(password);

    [DisplayName("测试数据源连接")]
    [HttpPost("sources/{sourceCode}/test")]
    public async Task<object> Test([FromRoute] string sourceCode)
    {
        var source = await FindOwnSourceAsync(sourceCode);
        if (string.Equals(source.SourceType, "DB", StringComparison.OrdinalIgnoreCase))
        {
            try
            {
                var started = DateTime.UtcNow;
                var scope = await _scopes.GetScopeAsync(source);
                await scope.Ado.GetScalarAsync("SELECT 1");
                var elapsed = (int)(DateTime.UtcNow - started).TotalMilliseconds;
                return new { ok = true, message = "数据库连接成功", dbType = source.DbType, elapsedMs = elapsed };
            }
            catch (Exception ex)
            {
                _logger.LogWarning(ex, "数据源 {SourceCode} 测试连接失败，tenant={TenantId}", source.SourceCode, source.TenantId);
                var error = MdpDbConnectionError.Describe(ex);
                return new { ok = false, code = error.Code, message = error.Message };
            }
        }
        if (string.Equals(source.SourceType, "API", StringComparison.OrdinalIgnoreCase))
        {
            if (string.IsNullOrWhiteSpace(source.ApiBaseUrl))
                return new { ok = false, message = "未填写接口地址" };
            try
            {
                using var http = new HttpClient { Timeout = TimeSpan.FromSeconds(5) };
                using var resp = await http.GetAsync(source.ApiBaseUrl);
                return new { ok = resp.IsSuccessStatusCode, message = $"HTTP {(int)resp.StatusCode}" };
            }
            catch (Exception)
            {
                return new { ok = false, message = "接口探测失败" };
            }
        }
        return new { ok = true, message = "对方推送不需要探测对端连接" };
    }

    [DisplayName("停用数据源前的登记检查")]
    [HttpGet("sources/{sourceCode}/bindings")]
    public async Task<object> Bindings([FromRoute] string sourceCode)
    {
        var source = await FindOwnSourceAsync(sourceCode);
        var system = string.IsNullOrWhiteSpace(source.SystemCode) ? source.SourceCode : source.SystemCode;
        var rows = await _db.Ado.SqlQueryAsync<dynamic>(
            """
            SELECT tenant_id AS tenantId, std_object AS stdObject
            FROM mdp_tenant_std_source
            WHERE source_system=@sys
            ORDER BY tenant_id, std_object
            """,
            new { sys = system });
        return new { systemCode = system, bindings = rows };
    }

    [DisplayName("停用数据源")]
    [HttpPost("sources/{sourceCode}/disable")]
    public async Task<object> Disable([FromRoute] string sourceCode, [FromBody] MdpSourceDisableInput input)
    {
        var source = await FindOwnSourceAsync(sourceCode);
        var system = string.IsNullOrWhiteSpace(source.SystemCode) ? source.SourceCode : source.SystemCode;
        var rows = await _db.Ado.SqlQueryAsync<dynamic>(
            "SELECT std_object AS stdObject FROM mdp_tenant_std_source WHERE source_system=@sys",
            new { sys = system });
        if (rows.Count > 0 && input.Confirm != true)
            return new { disabled = false, needConfirm = true, bindings = rows };
        source.Status = 0;
        source.UpdateTime = DateTime.Now;
        await _db.Updateable(source).UpdateColumns(x => new { x.Status, x.UpdateTime }).ExecuteCommandAsync();
        return new { disabled = true, sourceCode = source.SourceCode };
    }

    private async Task<MdpSource> FindOwnSourceAsync(string sourceCode)
    {
        var code = sourceCode.Trim();
        var source = await _db.Queryable<MdpSource>().Where(x => x.SourceCode == code).FirstAsync()
            ?? throw Oops.Oh($"未找到来源 {code}");
        if (!_user.SuperAdmin && !_user.SysAdmin && source.TenantId != _user.TenantId)
            throw Oops.Oh("不能操作其他租户的数据源");
        return source;
    }
}

public sealed class MdpSourceSaveInput
{
    public string SourceCode { get; set; } = "";
    public string SourceName { get; set; } = "";
    public string SourceType { get; set; } = "DB";
    public string? SystemCode { get; set; }
    public string? ConnMode { get; set; }
    public string? DbType { get; set; }
    public string? DbHost { get; set; }
    public int? DbPort { get; set; }
    public string? DbName { get; set; }
    public string? DbUser { get; set; }
    public string? DbPassword { get; set; }
    public string? DbExtraParams { get; set; }
    public string? ApiBaseUrl { get; set; }
    public string? Remark { get; set; }
}

public sealed class MdpSourceDisableInput
{
    public bool? Confirm { get; set; }
}