import { Farmer, Gravekeeper } from './Entity.js';


export class UI {
    constructor(ctx, game) {
        console.log("UI Version 1.1 Loaded");
        this.ctx = ctx;
        this.game = game;
        this.messageLog = document.getElementById('message-log');
        this.spellsList = document.getElementById('spells-list');
        this.inventoryLink = docugment.getElementById('inventory-link');
        this.inventoryLabel = document.querySelector('#inventory-panel .group-box-label');
        
        if (this.inventoryLink) {
            this.inventoryLink.onclick = (e) => {
                e.preventDefault();
                this.game.toggleInventory();
            };
        }

        if (this.inventoryLabel) {
            this.inventoryLabel.style.cursor = 'pointer';
            this.inventoryLabel.onclick = () => this.game.toggleInventory();
        }

        this.popup = null;
        this.popupTimeout = null;
    }

    log(message) {
        if (!this.messageLog) return;
        const div = document.createElement('div');
        div.textContent = message;
        this.messageLog.appendChild(div);
        this.messageLog.scrollTop = this.messageLog.scrollHeight;
    }

    renderMap(map, player, monsters, items, projectiles, tileSize) {
        // Fill background
        this.ctx.fillStyle = '#000000';
        this.ctx.fillRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);

        this.ctx.font = `${tileSize}px monospace`;
        this.ctx.textBaseline = 'top';

        // Calculate viewport (center on player)
        const viewWidth = Math.ceil(this.ctx.canvas.width / tileSize);
        const viewHeight = Math.ceil(this.ctx.canvas.height / tileSize);

        const startX = player.x - Math.floor(viewWidth / 2);
        const startY = player.y - Math.floor(viewHeight / 2);

        for (let y = 0; y < viewHeight; y++) {
            for (let x = 0; x < viewWidth; x++) {
                const mapX = startX + x;
                const mapY = startY + y;

                if (mapX >= 0 && mapX < map.width && mapY >= 0 && mapY < map.height) {
                    const tile = map.tiles[mapY][mapX];
                    const isLit = map.isLit(mapX, mapY);
                    const dist = Math.sqrt(Math.pow(player.x - mapX, 2) + Math.pow(player.y - mapY, 2));
                    const inRadius = dist <= 3.5; 
                    const isExplored = map.explored[mapY][mapX];

                    // Tiles are visible if lit, in radius, or remembered
                    if (isLit || inRadius || isExplored) {
                        // Check if it's currently in Line of Sight to draw it "bright"
                        const hasLOS = map.hasLineOfSight(player.x, player.y, mapX, mapY);
                        const isCurrentlyVisible = (isLit || inRadius) && hasLOS;
                        
                        this.drawTile(x * tileSize, y * tileSize, tile, tileSize, !isCurrentlyVisible);
                    } else {
                        // Draw nothing for unseen areas
                        this.ctx.fillStyle = '#000000';
                        this.ctx.fillRect(x * tileSize, y * tileSize, tileSize, tileSize);
                    }
                }
            }
        }

        // Draw Traps
        if (map.traps) {
            for (const trap of map.traps) {
                if (!trap.revealed) continue;
                
                const isLit = map.isLit(trap.x, trap.y);
                const dist = Math.sqrt(Math.pow(player.x - trap.x, 2) + Math.pow(player.y - trap.y, 2));
                const inRadius = dist <= 3.5;

                if (!(isLit || inRadius)) continue;
                if (!map.hasLineOfSight(player.x, player.y, trap.x, trap.y)) continue;

                const screenX = (trap.x - startX) * tileSize;
                const screenY = (trap.y - startY) * tileSize;
                if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                    screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                    this.ctx.fillStyle = '#ff0000';
                    this.ctx.fillText('^', screenX + tileSize / 4, screenY);
                }
            }
        }

        // Draw Fountains
        if (map.fountains) {
            for (const fountain of map.fountains) {
                const isLit = map.isLit(fountain.x, fountain.y);
                const dist = Math.sqrt(Math.pow(player.x - fountain.x, 2) + Math.pow(player.y - fountain.y, 2));
                const inRadius = dist <= 3.5;

                if (!(isLit || inRadius)) continue;
                if (!map.hasLineOfSight(player.x, player.y, fountain.x, fountain.y)) continue;

                const screenX = (fountain.x - startX) * tileSize;
                const screenY = (fountain.y - startY) * tileSize;
                if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                    screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                    
                    const asset = this.game.assets['fountain'];
                    if (asset && !fountain.used) {
                        this.ctx.drawImage(asset, screenX, screenY, tileSize, tileSize);
                    } else {
                        this.ctx.fillStyle = fountain.used ? '#808080' : '#00ffff';
                        this.ctx.fillText('&', screenX + tileSize / 4, screenY);
                    }
                }
            }
        }

        // Draw Signs
        if (map.signs) {
            for (const sign of map.signs) {
                const isLit = map.isLit(sign.x, sign.y);
                const dist = Math.sqrt(Math.pow(player.x - sign.x, 2) + Math.pow(player.y - sign.y, 2));
                const inRadius = dist <= 3.5;
                const isExplored = map.explored[sign.y][sign.x];

                if (!(isLit || inRadius || isExplored)) continue;
                
                // Only show bright if in LOS
                const hasLOS = map.hasLineOfSight(player.x, player.y, sign.x, sign.y);
                const isCurrentlyVisible = (isLit || inRadius) && hasLOS;

                const screenX = (sign.x - startX) * tileSize;
                const screenY = (sign.y - startY) * tileSize;
                if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                    screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                    this.ctx.fillStyle = isCurrentlyVisible ? '#8b4513' : '#4a250a'; // Darker brown if not visible
                    this.ctx.fillRect(screenX + 4, screenY + 4, tileSize - 8, tileSize - 8);
                    this.ctx.fillStyle = isCurrentlyVisible ? '#ffffff' : '#888888';
                    this.ctx.font = `bold ${tileSize/2}px monospace`;
                    this.ctx.textAlign = 'center';
                    this.ctx.fillText('?', screenX + tileSize / 2, screenY + tileSize / 1.5);
                }
            }
        }

        // Draw Items
        if (items) {
            for (const item of items) {
                const isLit = map.isLit(item.x, item.y);
                const dist = Math.sqrt(Math.pow(player.x - item.x, 2) + Math.pow(player.y - item.y, 2));
                const inRadius = dist <= 3.5;
                
                if (!(isLit || inRadius)) continue;
                if (!map.hasLineOfSight(player.x, player.y, item.x, item.y)) continue;

                const screenX = (item.x - startX) * tileSize;
                const screenY = (item.y - startY) * tileSize;
                if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                    screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                    this.drawEntity(screenX, screenY, item, tileSize);
                }
            }
        }

        // Draw Monsters
        for (const monster of monsters) {
            const isLit = map.isLit(monster.x, monster.y);
            const dist = Math.sqrt(Math.pow(player.x - monster.x, 2) + Math.pow(player.y - monster.y, 2));
            const inRadius = dist <= 3.5;
            
            if (!(isLit || inRadius)) continue;
            if (!map.hasLineOfSight(player.x, player.y, monster.x, monster.y)) continue;

            const screenX = (monster.x - startX) * tileSize;
            const screenY = (monster.y - startY) * tileSize;
            // Only draw if visible
            if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                this.drawEntity(screenX, screenY, monster, tileSize);
            }
        }

        // Draw Projectiles
        if (projectiles) {
            for (const proj of projectiles) {
                const isLit = map.isLit(proj.x, proj.y);
                const dist = Math.sqrt(Math.pow(player.x - proj.x, 2) + Math.pow(player.y - proj.y, 2));
                if (!(isLit || dist <= 3.5)) continue;

                const screenX = (proj.x - startX) * tileSize;
                const screenY = (proj.y - startY) * tileSize;
                if (screenX >= -tileSize && screenX < this.ctx.canvas.width &&
                    screenY >= -tileSize && screenY < this.ctx.canvas.height) {
                    this.drawEntity(screenX, screenY, proj, tileSize);
                }
            }
        }

        // Draw Player
        const playerScreenX = (player.x - startX) * tileSize;
        const playerScreenY = (player.y - startY) * tileSize;

        this.drawEntity(playerScreenX, playerScreenY, player, tileSize);

        this.drawPopup();
    }

    updateStats(player, depth) {
        const hpElem = document.getElementById('stat-hp');
        hpElem.textContent = player.hp;
        hpElem.style.color = player.poisoned ? '#00ff00' : '#ffffff';
        
        document.getElementById('stat-max-hp').textContent = player.maxHp;
        document.getElementById('stat-str').textContent = player.stats.str;
        document.getElementById('stat-level').textContent = player.level;
        document.getElementById('stat-xp').textContent = player.xp;
        document.getElementById('stat-max-xp').textContent = player.maxXp;
        document.getElementById('stat-ac').textContent = player.getDefense();
        document.getElementById('stat-floor').textContent = depth;
        document.getElementById('stat-gold').textContent = player.gold;
        document.getElementById('stat-mana').textContent = `${player.mana}/${player.maxMana}`;
        document.getElementById('stat-int').textContent = player.stats.int;

        const statusElem = document.getElementById('stat-status');
        if (statusElem) {
            statusElem.textContent = player.poisoned ? "POISONED" : "";
        }
    }

    updateInventory(player) {
        // Now handled by canvas-based inventory box
        if (this.inventoryLink) {
            this.inventoryLink.textContent = `[ View Inventory (${player.inventory.length}) ]`;
        }
    }

    drawOverviewMap(map, player) {
        const width = 500;
        const height = 500;
        const x = (this.ctx.canvas.width - width) / 2;
        const y = (this.ctx.canvas.height - height) / 2;

        // Background
        this.ctx.fillStyle = 'rgba(0, 0, 0, 0.85)';
        this.ctx.fillRect(x, y, width, height);
        this.ctx.strokeStyle = '#ffffff';
        this.ctx.lineWidth = 2;
        this.ctx.strokeRect(x, y, width, height);

        // Title
        this.ctx.fillStyle = '#ffffff';
        this.ctx.font = 'bold 20px monospace';
        this.ctx.textAlign = 'center';
        this.ctx.fillText('MAP OVERVIEW', x + width / 2, y + 30);

        // Map Scale
        const padding = 50;
        const mapAreaWidth = width - padding * 2;
        const mapAreaHeight = height - padding * 2;
        const scaleX = mapAreaWidth / map.width;
        const scaleY = mapAreaHeight / map.height;
        const scale = Math.min(scaleX, scaleY);
        
        const offsetX = x + (width - (map.width * scale)) / 2;
        const offsetY = y + (height - (map.height * scale)) / 2;

        for (let my = 0; my < map.height; my++) {
            for (let mx = 0; mx < map.width; mx++) {
                if (map.explored[my][mx]) {
                    const tile = map.tiles[my][mx];
                    if (tile === '#') {
                        this.ctx.fillStyle = '#555555';
                    } else if (tile === '>') {
                        this.ctx.fillStyle = '#ffffff'; // Highlight stairs down
                    } else if (tile === '<') {
                        this.ctx.fillStyle = '#ffffff'; // Highlight stairs up
                    } else if (tile === 't') {
                        // Tombstone
                        this.ctx.fillStyle = '#222222';
                    } else {
                        this.ctx.fillStyle = '#222222';
                    }
                    this.ctx.fillRect(offsetX + mx * scale, offsetY + my * scale, scale, scale);
                }
            }
        }

        // Draw Player Position
        this.ctx.fillStyle = '#ffff00';
        this.ctx.beginPath();
        this.ctx.arc(offsetX + player.x * scale + scale / 2, offsetY + player.y * scale + scale / 2, scale * 1.5, 0, Math.PI * 2);
        this.ctx.fill();

        // Legend/Instructions
        this.ctx.fillStyle = '#888888';
        this.ctx.font = '12px monospace';
        this.ctx.fillText('Yellow: You | White: Stairs | [M] to Close', x + width / 2, y + height - 15);
        
        this.ctx.textAlign = 'start';
    }

    drawIntro(textLines) {
        const width = 750;
        const height = 550;
        const x = (this.ctx.canvas.width - width) / 2;
        const y = (this.ctx.canvas.height - height) / 2;

        // Shadow
        this.ctx.fillStyle = 'rgba(0, 0, 0, 0.7)';
        this.ctx.fillRect(x + 10, y + 10, width, height);

        // Background
        this.ctx.fillStyle = '#000000';
        this.ctx.fillRect(x, y, width, height);
        this.ctx.strokeStyle = '#ffffff';
        this.ctx.lineWidth = 3;
        this.ctx.strokeRect(x, y, width, height);

        // Title
        this.ctx.fillStyle = '#ffff00';
        this.ctx.font = 'bold 24px "Courier New", monospace';
        this.ctx.textAlign = 'center';
        this.ctx.fillText('THE LEGEND OF OAKHAVEN', x + width / 2, y + 40);

        // Text
        this.ctx.fillStyle = '#ffffff';
        this.ctx.font = '16px "Courier New", monospace';
        let lineY = y + 80;
        textLines.forEach(line => {
            this.ctx.fillText(line, x + width / 2, lineY);
            lineY += 20;
        });

        this.ctx.textAlign = 'start';
    }

    drawInventory(player, selectedIndex) {
        const ctx = this.ctx;
        const width = 500;
        const height = 400;
        const x = (ctx.canvas.width - width) / 2;
        const y = (ctx.canvas.height - height) / 2;

        // Background
        ctx.fillStyle = '#000000';
        ctx.fillRect(x, y, width, height);
        ctx.strokeStyle = '#ffffff';
        ctx.lineWidth = 2;
        ctx.strokeRect(x, y, width, height);

        // Title
        ctx.fillStyle = '#ffffff';
        ctx.font = '20px monospace';
        ctx.textAlign = 'center';
        ctx.fillText('Inventory', x + width / 2, y + 30);

        // Items
        ctx.font = '16px monospace';
        ctx.textAlign = 'left';
        let itemY = y + 70;

        const groupedItems = this.game.getGroupedInventory();

        if (groupedItems.length === 0) {
            ctx.fillStyle = '#888888';
            ctx.textAlign = 'center';
            ctx.fillText('Empty', x + width / 2, itemY + 20);
        } else {
            groupedItems.forEach((group, index) => {
                const isSelected = index === selectedIndex;
                const isEquipped = group.indices.some(idx => {
                    const item = player.inventory[idx];
                    return player.equipment.weapon === item || player.equipment.armor === item || player.equipment.shield === item;
                });

                if (isSelected) {
                    ctx.fillStyle = '#333333';
                    ctx.fillRect(x + 20, itemY - 5, width - 40, 25);
                    ctx.fillStyle = '#ffff00';
                    ctx.fillText('>', x + 25, itemY + 10);
                } else {
                    // Color based on quality if identified
                    if (!group.item.identified) {
                        ctx.fillStyle = '#aaaaaa'; // Gray for unidentified
                    } else if (group.item.isCursed) {
                        ctx.fillStyle = '#ff4444'; // Red for cursed
                    } else if (group.item.modifier > 0) {
                        ctx.fillStyle = '#00ffff'; // Cyan for enchanted
                    } else {
                        ctx.fillStyle = '#aaaaaa';
                    }
                }

                let displayName = group.item.getDisplayName();
                if (group.count > 1) displayName += ` (${group.count})`;
                if (isEquipped) displayName += " (E)";
                
                // Draw Icon if available
                const assetName = this.getAssetName(group.item);
                const asset = this.game.assets[assetName];
                if (asset) {
                    this.ctx.drawImage(asset, x + 50, itemY, 20, 20);
                    this.ctx.fillText(displayName, x + 80, itemY + 10);
                } else {
                    this.ctx.fillText(displayName, x + 50, itemY + 10);
                }
                
                itemY += 30;
            });
        }

        // Instructions
        ctx.fillStyle = '#888888';
        ctx.font = '12px monospace';
        ctx.textAlign = 'center';
        ctx.fillText('1:Laser|2:Fire|3:Light|4:Heal|5:Ret|6:Det|7:Cure|Up/Down:Sel|Enter:Use|Esc/i:Close', x + width / 2, y + height - 20);

        // Reset
        ctx.textAlign = 'start';
    }

    updateSpells(player) {
        if (!this.spellsList) return;
        this.spellsList.innerHTML = '';
        player.spells.forEach((spell, index) => {
            const li = document.createElement('li');
            li.textContent = `${index + 1}. ${spell}`;
            li.style.cursor = 'pointer';
            li.style.padding = '2px';
            li.onmouseover = () => li.style.backgroundColor = 'rgba(255,255,255,0.1)';
            li.onmouseout = () => li.style.backgroundColor = 'transparent';
            li.onclick = () => {
                if (spell === 'zappy laser') this.game.startTargeting('zappy laser');
                else if (spell === 'Fireball') this.game.startTargeting('Fireball');
                else if (spell === 'Light') this.game.castLightSpell();
                else if (spell === 'Heal') this.game.castHealSpell();
                else if (spell === 'Return') this.game.castReturnSpell();
                else if (spell === 'Detect Traps') this.game.castDetectTrapsSpell();
                else if (spell === 'Cure Poison') this.game.castCurePoisonSpell();
            };
            this.spellsList.appendChild(li);
        });
    }

    drawTile(screenX, screenY, tile, size, isMemorized = false) {
        const ctx = this.ctx;
        if (tile === '#') {
            ctx.fillStyle = isMemorized ? '#404040' : '#808080'; // Darker gray for memorized walls
            ctx.fillRect(screenX, screenY, size, size);
            
            // Wall highlights
            ctx.strokeStyle = isMemorized ? '#606060' : '#ffffff';
            ctx.lineWidth = 1;
            ctx.strokeRect(screenX + 1, screenY + 1, size - 2, size - 2);

        } else if (tile === '>') {
            // Stairs Down
            ctx.fillStyle = '#202020';
            ctx.fillRect(screenX, screenY, size, size);
            ctx.fillStyle = isMemorized ? '#888888' : '#ffffff';
            ctx.fillText('>', screenX + size / 4, screenY);
        } else if (tile === '<') {
            // Stairs Up
            ctx.fillStyle = '#202020';
            ctx.fillRect(screenX, screenY, size, size);
            ctx.fillStyle = isMemorized ? '#888888' : '#ffffff';
            ctx.fillText('<', screenX + size / 4, screenY);
        } else if (tile === '"' || tile === ',') {
            // Field
            if (tile === '"') ctx.fillStyle = isMemorized ? '#3d2b25' : '#5d4037';
            else ctx.fillStyle = isMemorized ? '#1b4a1e' : '#2e7d32';
            ctx.fillRect(screenX, screenY, size, size);
        } else if (tile === 't') {
            // Tombstone
            ctx.fillStyle = '#202020';
            ctx.fillRect(screenX, screenY, size, size);
            ctx.fillStyle = isMemorized ? '#404040' : '#888888';
            ctx.fillText('†', screenX + size / 4, screenY);
        } else {
            // Floor
            ctx.fillStyle = '#202020';
            ctx.fillRect(screenX, screenY, size, size);
            ctx.fillStyle = isMemorized ? '#222222' : '#404040'; // Very dark for memorized floor
            ctx.fillText('.', screenX + size / 4, screenY);
        }
    }

    showPopup(text, duration) {
        this.popup = text;
        if (this.popupTimeout) clearTimeout(this.popupTimeout);
        this.game.render();

        this.popupTimeout = setTimeout(() => {
            this.popup = null;
            this.game.render();
        }, duration);
    }

    drawPopup() {
        if (!this.popup) return;

        const ctx = this.ctx;
        ctx.font = '16px "Courier New", monospace';
        const textMetrics = ctx.measureText(this.popup);
        const textWidth = textMetrics.width;

        const width = textWidth + 40; // Add padding
        const height = 50;
        const x = (this.ctx.canvas.width - width) / 2;
        const y = (this.ctx.canvas.height - height) / 2 - 50; // Slightly above center

        // Background
        ctx.fillStyle = '#ffffff';
        ctx.fillRect(x, y, width, height);

        // Border
        ctx.strokeStyle = '#000000';
        ctx.lineWidth = 2;
        ctx.strokeRect(x, y, width, height);

        // Text
        ctx.fillStyle = '#000000';
        ctx.textAlign = 'center';
        ctx.textBaseline = 'middle';
        ctx.fillText(this.popup, x + width / 2, y + height / 2);

        // Reset text align
        ctx.textAlign = 'start';
        ctx.textBaseline = 'alphabetic';
    }

    drawEntity(screenX, screenY, entity, size) {
        const assetName = this.getAssetName(entity);
        const asset = this.game.assets[assetName];

        if (asset) {
            this.ctx.drawImage(asset, screenX, screenY, size, size);
        } else {
            this.ctx.fillStyle = entity.color;
            this.ctx.fillText(entity.symbol, screenX + size / 4, screenY);
        }
    }

    getAssetName(entity) {
        if (!entity) return null;
        const name = entity.name || "";
        
        if (name === 'Player') return 'hero';
        if (name === 'Rat') return 'rat';
        if (name === 'Kobold') return 'kobold';
        if (name === 'Orc') return 'orc';
        if (name === 'Skeleton Archer') return 'skeleton archer';
        if (name === 'Elite Archer' || name === 'Sniper' || name === 'Archer') return 'archer';
        if (name === 'Ogre' || name === 'Troll') return 'ogre';
        if (name === 'Cobra') return 'cobra';
        if (name === 'Dragon') return 'dragon';
        if (name === 'The Dungeon Lord') return 'dungeon lord';
        
        // Town NPCs
        if (name === 'Peasant' || name.startsWith('Traveler') || name.startsWith('Farmer') || entity instanceof Farmer) {
            // Consistent but "random" assignment based on coordinates
            return (entity.x + entity.y) % 2 === 0 ? 'peasant1' : 'peasant2';
        }
        if (name === 'Villager' || name === 'Old Man' || name === 'Woman') return 'house questgiver';
        if (name === 'Priest' || name === 'Father Sun' || name === 'Smith' || name === 'Merchant' || name === 'Mort' || entity instanceof Gravekeeper) return 'mysterious figure';

        // Items
        if (name === 'Dagger') return 'dagger';
        if (name.includes('Sword') || name.includes('Blade')) return 'sword';
        if (name.includes('Axe') || name.includes('Hammer')) return 'axe';
        if (name === 'Buckler') return 'buckler';
        if (name === 'Wooden Shield') return 'wooden shield';
        if (name.includes('Shield')) return 'kite shield';
        if (entity.type === 'spellbook' || name.includes('Spellbook')) return 'spellbook';
        
        // Projectiles / Special
        if (name === 'zappy laser') return 'zappy laser';

        return null;
    }

    drawShop(shopkeeper, player, selectedIndex, mode = 'BUY') {
        const ctx = this.ctx;
        const width = 500;
        const height = 400;
        const x = (ctx.canvas.width - width) / 2;
        const y = (ctx.canvas.height - height) / 2;

        // Background
        ctx.fillStyle = '#000000';
        ctx.fillRect(x, y, width, height);
        ctx.strokeStyle = '#ffffff';
        ctx.lineWidth = 2;
        ctx.strokeRect(x, y, width, height);

        // Title
        ctx.fillStyle = '#ffffff';
        ctx.font = '20px monospace';
        ctx.textAlign = 'center';
        ctx.fillText(`${shopkeeper.shopName} - ${mode}`, x + width / 2, y + 30);

        // Items
        ctx.font = '16px monospace';
        ctx.textAlign = 'left';
        let itemY = y + 70;

        const list = mode === 'BUY' ? shopkeeper.inventory : this.game.getGroupedInventory();

        if (list.length === 0) {
            ctx.fillStyle = '#888888';
            ctx.textAlign = 'center';
            ctx.fillText(mode === 'BUY' ? 'Sold Out' : 'Nothing to sell', x + width / 2, itemY + 20);
        } else {
            list.forEach((entry, index) => {
                const isSelected = index === selectedIndex;
                const item = mode === 'BUY' ? entry.item : entry.item;
                const count = mode === 'SELL' ? entry.count : 1;
                
                let price = 0;
                if (mode === 'BUY') {
                    price = entry.price;
                } else {
                    // Calc sell price
                    let baseValue = 40;
                    if (item.type === 'weapon') baseValue = 100 * item.level;
                    if (item.type === 'shield') baseValue = 40 * item.level;
                    if (item.type === 'potion') baseValue = 20;
                    price = Math.floor(baseValue / 4);
                }

                if (isSelected) {
                    ctx.fillStyle = '#333333';
                    ctx.fillRect(x + 20, itemY - 5, width - 40, 25);
                    ctx.fillStyle = '#ffff00';
                    ctx.fillText('>', x + 25, itemY + 10);
                } else {
                    if (mode === 'SELL') {
                        if (!item.identified) ctx.fillStyle = '#aaaaaa';
                        else if (item.isCursed) ctx.fillStyle = '#ff4444';
                        else if (item.modifier > 0) ctx.fillStyle = '#00ffff';
                        else ctx.fillStyle = '#aaaaaa';
                    } else {
                        ctx.fillStyle = '#aaaaaa';
                    }
                }

                // Draw Icon if available
                const assetName = this.getAssetName(item);
                const asset = this.game.assets[assetName];
                let itemName = item.getDisplayName ? item.getDisplayName() : item.name;
                if (count > 1) itemName += ` (${count})`;

                if (asset) {
                    this.ctx.drawImage(asset, x + 50, itemY, 20, 20);
                    this.ctx.fillText(`${itemName}`, x + 80, itemY + 10);
                } else {
                    this.ctx.fillText(`${itemName}`, x + 50, itemY + 10);
                }

                ctx.textAlign = 'right';
                ctx.fillText(`${price}g`, x + width - 50, itemY + 10);
                ctx.textAlign = 'left';

                itemY += 30;
            });
        }

        // Player Gold
        ctx.fillStyle = '#ffd700';
        ctx.textAlign = 'center';
        ctx.fillText(`Gold: ${player.gold}`, x + width / 2, y + height - 50);

        // Instructions
        ctx.fillStyle = '#888888';
        ctx.font = '12px monospace';
        ctx.fillText('Tab: Mode | Up/Down: Sel | Enter: Action | Esc: Exit', x + width / 2, y + height - 20);

        // Reset
        ctx.textAlign = 'start';
    }
}