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use crate::core::logic::*;
use crate::core::enums::*;
use std::collections::HashMap;

fn create_test_db() -> CardDatabase {
    CardDatabase {
        members: HashMap::new(),
        lives: HashMap::new(),
        members_vec: vec![None; 1000],
        lives_vec: vec![None; 40000],
    }
}

fn create_test_state() -> GameState {
    let mut state = GameState::default();
    state.players[0].player_id = 0;
    state.players[1].player_id = 1;
    state.phase = Phase::Main;
    state
}

#[test]
fn test_opcode_draw_discard() {
    let db = create_test_db();
    let mut state = create_test_state();
    state.players[0].deck = vec![1, 2, 3, 4, 5];

    let ctx = AbilityContext { player_id: 0, ..Default::default() };

    // O_DRAW 2
    let bc = vec![O_DRAW, 2, 0, 0, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].hand.len(), 2);
    assert_eq!(state.players[0].deck.len(), 3);
    assert_eq!(state.phase, Phase::Main); // Phase should not change

    // O_MOVE_TO_DISCARD 1 (attr 2 = Hand)
    let bc = vec![O_MOVE_TO_DISCARD, 1, 2, 0, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].hand.len(), 1);
    assert_eq!(state.players[0].discard.len(), 1);
    assert_eq!(state.phase, Phase::Main);
}

#[test]
fn test_opcode_stats_boost() {
    let db = create_test_db();
    let mut state = create_test_state();
    state.players[0].stage[0] = 10;

    let ctx = AbilityContext { player_id: 0, area_idx: 0, ..Default::default() };

    // O_BLADES 2 to SELF (Slot 4)
    let bc = vec![O_BLADES, 2, 0, 4, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].blade_buffs[0], 2);

    // O_HEARTS 3 (Pink=0) to SELF (Slot 4)
    let bc = vec![O_HEARTS, 3, 0, 4, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].heart_buffs[0][0], 3);

    // O_BOOST 5 to SELF
    let bc = vec![O_BOOST, 5, 0, 0, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].live_score_bonus, 5);
}

#[test]
fn test_opcode_tap_untap() {
    let db = create_test_db();
    let mut state = create_test_state();
    state.players[0].stage[1] = 20;
    state.players[0].tapped_members[1] = false;

    let ctx = AbilityContext { player_id: 0, area_idx: 1, ..Default::default() };

    // O_SET_TAPPED 1 SELF
    let bc = vec![O_SET_TAPPED, 1, 0, 4, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert!(state.players[0].tapped_members[1]);

    // O_SET_TAPPED 0 SELF
    let bc = vec![O_SET_TAPPED, 0, 0, 4, O_RETURN, 0, 0, 0];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert!(!state.players[0].tapped_members[1]);
}

#[test]
fn test_conditions_basic() {
    let db = create_test_db();
    let mut state = create_test_state();
    state.players[0].hand = vec![1, 2, 3];

    let ctx = AbilityContext { player_id: 0, ..Default::default() };

    // C_HND GE 3 -> Draw 1
    // Bytecode: [C_HND, 3, 0, 0, O_JUMP_F, 1, 0, 0, O_DRAW, 1, 0, 0, O_RETURN, 0, 0, 0]
    let bc = vec![
        C_HND, 3, 0, 0,
        O_JUMP_F, 1, 0, 0,
        O_DRAW, 1, 0, 0,
        O_RETURN, 0, 0, 0
    ];

    state.players[0].deck = vec![100];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].hand.len(), 4);

    // C_HND GE 5 (False) -> Draw 1
    let mut state = create_test_state();
    state.players[0].hand = vec![1, 2, 3];
    state.players[0].deck = vec![100];
    let bc = vec![
        C_HND, 5, 0, 0,
        O_JUMP_F, 1, 0, 0,
        O_DRAW, 1, 0, 0,
        O_RETURN, 0, 0, 0
    ];
    state.resolve_bytecode(&db, &bc, &ctx);
    assert_eq!(state.players[0].hand.len(), 3);
}

// TODO: test_modal_select_mode requires understanding of the exact SELECT_MODE bytecode format.
// The jump table calculation in logic.rs line 1576:
//   jump_ip = (ip / 4) + 1 + choice
//   offset = cur_bc[jump_ip * 4 + 1]
//   new_ip = (jump_ip + offset) * 4
// This test is commented out until the bytecode format is confirmed.
/*

#[test]

fn test_modal_select_mode() {

    // ... test code ...

}

*/