import 'package:flutter/material.dart';
import '../../../core/theme/app_theme.dart';

/// Mirrors `FinlyticCore.Dtos.Trading.OutcomeReason` (`TradeEnums.cs`), which the
/// `/api/v1/admin/evaluations` endpoint serializes as a `JsonStringEnumConverter`
/// string using the exact C# member name (e.g. `"Approved"`, `"BelowScoreThreshold"`).
///
/// [unknown] is the fallback both for the server's own `Unknown = 0` default (an
/// honest "we don't know" rather than a fabricated reason, Rules.md §4) and for any
/// future server-side member this client doesn't recognize yet.
enum OutcomeReason {
  unknown,
  approved,
  belowScoreThreshold,
  earningsLockout,
  simulationVeto,
  aiRejected,
  noTechnicalSetups,
  duplicateActiveProposal,
  dividendGate;

  static OutcomeReason fromJson(String? raw) {
    switch (raw) {
      case 'Approved':
        return OutcomeReason.approved;
      case 'BelowScoreThreshold':
        return OutcomeReason.belowScoreThreshold;
      case 'EarningsLockout':
        return OutcomeReason.earningsLockout;
      case 'SimulationVeto':
        return OutcomeReason.simulationVeto;
      case 'AiRejected':
        return OutcomeReason.aiRejected;
      case 'NoTechnicalSetups':
        return OutcomeReason.noTechnicalSetups;
      case 'DuplicateActiveProposal':
        return OutcomeReason.duplicateActiveProposal;
      case 'DividendGate':
        return OutcomeReason.dividendGate;
      case 'Unknown':
      default:
        return OutcomeReason.unknown;
    }
  }

  /// Exact server-side enum member name. `[FromQuery] OutcomeReason?` on
  /// `AdminEvaluationHistoryController` model-binds a bare enum member name from
  /// the query string (ASP.NET Core's default `Enum.TryParse`-based binder), not a
  /// JSON string — so this is what must be sent back as the `outcome` filter value.
  String toApiValue() {
    switch (this) {
      case OutcomeReason.approved:
        return 'Approved';
      case OutcomeReason.belowScoreThreshold:
        return 'BelowScoreThreshold';
      case OutcomeReason.earningsLockout:
        return 'EarningsLockout';
      case OutcomeReason.simulationVeto:
        return 'SimulationVeto';
      case OutcomeReason.aiRejected:
        return 'AiRejected';
      case OutcomeReason.noTechnicalSetups:
        return 'NoTechnicalSetups';
      case OutcomeReason.duplicateActiveProposal:
        return 'DuplicateActiveProposal';
      case OutcomeReason.dividendGate:
        return 'DividendGate';
      case OutcomeReason.unknown:
        return 'Unknown';
    }
  }

  String get label {
    switch (this) {
      case OutcomeReason.approved:
        return 'Freigegeben';
      case OutcomeReason.belowScoreThreshold:
        return 'Score zu niedrig';
      case OutcomeReason.earningsLockout:
        return 'Earnings-Sperre';
      case OutcomeReason.simulationVeto:
        return 'Simulation-Veto';
      case OutcomeReason.aiRejected:
        return 'KI abgelehnt';
      case OutcomeReason.noTechnicalSetups:
        return 'Kein Setup';
      case OutcomeReason.duplicateActiveProposal:
        return 'Bereits aktiver Vorschlag';
      case OutcomeReason.dividendGate:
        return 'Dividend-Sperre';
      case OutcomeReason.unknown:
        return 'Unbekannt';
    }
  }

  /// Color-coding for the history-list badge, reusing only colors already
  /// established elsewhere in the app (`AppTheme.primaryEmerald`/`accentRed` plus
  /// the `Colors.amber`/`Colors.purpleAccent` already used by
  /// `EvaluationScoreBreakdownSheet`) rather than introducing a new palette.
  Color get color {
    switch (this) {
      case OutcomeReason.approved:
        return AppTheme.primaryEmerald;
      case OutcomeReason.aiRejected:
      case OutcomeReason.simulationVeto:
        return AppTheme.accentRed;
      case OutcomeReason.belowScoreThreshold:
      case OutcomeReason.earningsLockout:
      case OutcomeReason.duplicateActiveProposal:
      case OutcomeReason.dividendGate:
        return Colors.amber;
      case OutcomeReason.noTechnicalSetups:
      case OutcomeReason.unknown:
        return AppTheme.textMuted;
    }
  }
}

/// Mirrors `FinlyticCore.Dtos.Trading.TriggerSource`.
enum TriggerSource {
  unknown,
  automatic,
  manual;

  static TriggerSource fromJson(String? raw) {
    switch (raw) {
      case 'Automatic':
        return TriggerSource.automatic;
      case 'Manual':
        return TriggerSource.manual;
      case 'Unknown':
      default:
        return TriggerSource.unknown;
    }
  }

  String toApiValue() {
    switch (this) {
      case TriggerSource.automatic:
        return 'Automatic';
      case TriggerSource.manual:
        return 'Manual';
      case TriggerSource.unknown:
        return 'Unknown';
    }
  }

  String get label {
    switch (this) {
      case TriggerSource.automatic:
        return 'Automatisch';
      case TriggerSource.manual:
        return 'Manuell';
      case TriggerSource.unknown:
        return 'Unbekannt';
    }
  }

  Color get color {
    switch (this) {
      case TriggerSource.automatic:
        return AppTheme.accentCyan;
      case TriggerSource.manual:
        return Colors.purpleAccent;
      case TriggerSource.unknown:
        return AppTheme.textMuted;
    }
  }
}

/// Mirrors `FinlyticCore.Dtos.TechnicalAnalysis.UniverseSource` - which recurring
/// FinlyticTechnicals selection mechanism added the ISIN to the continuously
/// scanned universe before this evaluation ran. `null` on the Dart side (not
/// modeled as its own enum value here) means the evaluation happened outside
/// that universe entirely (e.g. a manual "Analyze now" call).
enum UniverseSource {
  sentimentSpike,
  userFavorite,
  discovery;

  static UniverseSource? fromJson(String? raw) {
    switch (raw) {
      case 'SentimentSpike':
        return UniverseSource.sentimentSpike;
      case 'UserFavorite':
        return UniverseSource.userFavorite;
      case 'Discovery':
        return UniverseSource.discovery;
      default:
        return null;
    }
  }

  String get label {
    switch (this) {
      case UniverseSource.sentimentSpike:
        return 'Sentiment-Spike';
      case UniverseSource.userFavorite:
        return 'Nutzer-Favorit';
      case UniverseSource.discovery:
        return 'Discovery-Liste';
    }
  }
}