import 'package:flutter/material.dart';
import 'word_model.dart';

/// One of the 10 Archons that rules over a triad of 3 columns (e.g. cols 0..2, 3..5, etc.).
class ArchonSector {
  final int index; // 0..9
  final WordItem archonWord;
  final int startCol;
  final int endCol;
  final Color sectorColor;
  final String title;

  Color get color => sectorColor;

  const ArchonSector({
    required this.index,
    required this.archonWord,
    required this.startCol,
    required this.endCol,
    required this.sectorColor,
    required this.title,
  });
}

/// A cell representing a House in the 33x30 field.
class HouseCell {
  final int row; // 0..32
  final int col; // 0..29
  final int houseIndex; // 0..989 (position in grid)
  final WordItem houseWord; // The Host / Spirit of this House
  final int sectorIndex; // 0..9

  // Assigned during divination
  WordItem? guestWord; // The Guest symbol that enters this house
  int? selectionOrder; // 1..9 (order in which the user selected this house)

  HouseCell({
    required this.row,
    required this.col,
    required this.houseIndex,
    required this.houseWord,
    required this.sectorIndex,
    this.guestWord,
    this.selectionOrder,
  });

  bool get isSelected => selectionOrder != null;

  HouseCell copyWith({
    WordItem? guestWord,
    int? selectionOrder,
    bool clearGuest = false,
    bool clearOrder = false,
  }) {
    return HouseCell(
      row: row,
      col: col,
      houseIndex: houseIndex,
      houseWord: houseWord,
      sectorIndex: sectorIndex,
      guestWord: clearGuest ? null : (guestWord ?? this.guestWord),
      selectionOrder: clearOrder ? null : (selectionOrder ?? this.selectionOrder),
    );
  }
}

enum ChainEndType {
  loop, // Петля судьбы: энергия замкнулась на дом из цепочки
  archonThrone, // Престол Архонта: цепь увенчалась верховным Архонтом
  fieldVector, // Длинный вектор: открытый импульс сквозь матрицу
}

/// A step in a House Chain: House A -> Guest B -> House of B...
class HouseChainStep {
  final HouseCell house;
  final WordItem guest;
  final bool isLoopClosing;
  final bool leadsToArchon;
  final bool computed;
  final ArchonSector? destinationArchon;

  const HouseChainStep({
    required this.house,
    required this.guest,
    this.isLoopClosing = false,
    this.leadsToArchon = false,
    this.computed = false,
    this.destinationArchon,
  });
}

/// A full trajectory of energy moving between houses across the 990 field.
class HouseChain {
  final int chainIndex;
  final HouseCell startingHouse;
  final List<HouseChainStep> steps;
  final ChainEndType endType;
  final String description;

  const HouseChain({
    required this.chainIndex,
    required this.startingHouse,
    required this.steps,
    required this.endType,
    required this.description,
  });


  bool get hasLoop => endType == ChainEndType.loop;

  String get endTypeTitle {
    switch (endType) {
      case ChainEndType.loop:
        return 'Петля Судьбы';
      case ChainEndType.archonThrone:
        return 'Престол Архонта';
      case ChainEndType.fieldVector:
        return 'Вектор в поле';
    }
  }

  Color get statusColor {
    switch (endType) {
      case ChainEndType.loop:
        return const Color(0xFFE57373);
      case ChainEndType.archonThrone:
        return const Color(0xFFFFD54F);
      case ChainEndType.fieldVector:
        return const Color(0xFF64B5F6);
    }
  }
}

/// The entire state of a Houses divination session.
class HousesSession {
  final String id;
  final DateTime createdAt;
  final String? question;
  final WordItem? querentWord; // Карта Кверента (субъект / объект гадания)
  final int? querentHouseIndex; // Индекс дома кверента на поле 33x30 (если есть)
  final List<ArchonSector> sectors; // 10 Archons
  final List<HouseCell> grid; // 990 House cells (33 rows x 30 cols)
  final List<HouseCell> selectedHouses; // 1..9 houses in order of selection
  final List<HouseChain> chains; // Calculated house chains
  final String? aiInterpretation;

  const HousesSession({
    required this.id,
    required this.createdAt,
    this.question,
    this.querentWord,
    this.querentHouseIndex,
    required this.sectors,
    required this.grid,
    required this.selectedHouses,
    required this.chains,
    this.aiInterpretation,
  });

  HousesSession copyWith({
    String? question,
    WordItem? querentWord,
    int? querentHouseIndex,
    String? aiInterpretation,
    List<HouseCell>? selectedHouses,
    List<HouseChain>? chains,
  }) {
    return HousesSession(
      id: id,
      createdAt: createdAt,
      question: question ?? this.question,
      querentWord: querentWord ?? this.querentWord,
      querentHouseIndex: querentHouseIndex ?? this.querentHouseIndex,
      sectors: sectors,
      grid: grid,
      selectedHouses: selectedHouses ?? this.selectedHouses,
      chains: chains ?? this.chains,
      aiInterpretation: aiInterpretation ?? this.aiInterpretation,
    );
  }
}