/**
 * DOOM 3D - Pickups, Keycards & Explosive Barrels System
 * 3D rotating items, bobbing animations, and chain reaction explosive toxic barrels.
 */

class DoomItems {
    constructor(engine, player, sound, map) {
        this.engine = engine;
        this.player = player;
        this.sound = sound;
        this.map = map;

        this.items = [];
        this.barrels = [];
        this.itemTextures = {};

        this.generateItemTextures();
        this.spawnMapItems();
        this.spawnMapBarrels();
    }

    generateItemTextures() {
        this.itemTextures.medikit = this.createMedikitTexture();
        this.itemTextures.armorGreen = this.createArmorTexture('#22aa22');
        this.itemTextures.armorBlue = this.createArmorTexture('#0088ff');
        this.itemTextures.ammoClip = this.createAmmoTexture('CLIP');
        this.itemTextures.ammoShells = this.createAmmoTexture('SHELLS');
        this.itemTextures.ammoRocket = this.createAmmoTexture('ROCKETS');
        this.itemTextures.ammoCell = this.createAmmoTexture('CELLS');
    }

    createMedikitTexture() {
        const c = document.createElement('canvas');
        c.width = 64;
        c.height = 64;
        const ctx = c.getContext('2d');
        ctx.fillStyle = '#eeeeee';
        ctx.fillRect(0, 0, 64, 64);
        ctx.fillStyle = '#cc0000';
        // Red cross
        ctx.fillRect(24, 10, 16, 44);
        ctx.fillRect(10, 24, 44, 16);
        const tex = new THREE.CanvasTexture(c);
        return tex;
    }

    createArmorTexture(color) {
        const c = document.createElement('canvas');
        c.width = 64;
        c.height = 64;
        const ctx = c.getContext('2d');
        ctx.fillStyle = color;
        ctx.fillRect(8, 8, 48, 48);
        ctx.fillStyle = '#ffffff';
        ctx.fillRect(18, 18, 28, 28);
        const tex = new THREE.CanvasTexture(c);
        return tex;
    }

    createAmmoTexture(label) {
        const c = document.createElement('canvas');
        c.width = 64;
        c.height = 64;
        const ctx = c.getContext('2d');
        ctx.fillStyle = '#3a3a30';
        ctx.fillRect(0, 0, 64, 64);
        ctx.fillStyle = '#ddaa00';
        ctx.font = 'bold 12px monospace';
        ctx.fillText(label, 6, 36);
        const tex = new THREE.CanvasTexture(c);
        return tex;
    }

    // ----------------------------------------------------
    // SPAWNING ITEMS & KEYCARDS
    // ----------------------------------------------------

    spawnMapItems() {
        const spawns = (this.map && this.map.spawns) ? this.map.spawns.items : (window.game && window.game.map ? window.game.map.spawns.items : []);
        if (!spawns || spawns.length === 0) return;

        for (let i = 0; i < spawns.length; i++) {
            const s = spawns[i];
            this.spawnItem(s.type, s.x, s.y, s.z);
        }
    }

    spawnItem(type, x, y, z) {
        let mesh = null;
        let light = null;
        let scale = 1.0;

        if (type.startsWith('key_')) {
            // 3D Keycard with colored glowing point light
            const colorName = type.replace('key_', '');
            let colorHex = 0x0088ff;
            if (colorName === 'red') colorHex = 0xff1122;
            if (colorName === 'yellow') colorHex = 0xffbb00;

            const geo = new THREE.BoxGeometry(0.8, 1.2, 0.15);
            const mat = new THREE.MeshStandardMaterial({
                color: colorHex,
                emissive: colorHex,
                emissiveIntensity: 0.8
            });
            mesh = new THREE.Mesh(geo, mat);
            light = new THREE.PointLight(colorHex, 2.5, 6, 2);
            light.position.set(x, y + 0.6, z);
            this.engine.scene.add(light);
        } else if (type === 'soulsphere') {
            // Blue glowing soulsphere
            const geo = new THREE.SphereGeometry(0.6, 16, 16);
            const mat = new THREE.MeshStandardMaterial({
                color: 0x00d4ff,
                emissive: 0x00d4ff,
                emissiveIntensity: 0.9,
                transparent: true,
                opacity: 0.85
            });
            mesh = new THREE.Mesh(geo, mat);
            light = new THREE.PointLight(0x00d4ff, 3.5, 10, 2);
            light.position.set(x, y + 0.6, z);
            this.engine.scene.add(light);
        } else if (type === 'medikit') {
            const geo = new THREE.BoxGeometry(0.8, 0.6, 0.8);
            const mat = new THREE.MeshStandardMaterial({ map: this.itemTextures.medikit });
            mesh = new THREE.Mesh(geo, mat);
        } else if (type.startsWith('armor_')) {
            const isBlue = type.includes('blue');
            const geo = new THREE.BoxGeometry(0.9, 0.9, 0.9);
            const mat = new THREE.MeshStandardMaterial({
                map: isBlue ? this.itemTextures.armorBlue : this.itemTextures.armorGreen,
                emissive: isBlue ? 0x0044ff : 0x008800,
                emissiveIntensity: 0.3
            });
            mesh = new THREE.Mesh(geo, mat);
        } else {
            // Ammo / Weapon box
            const geo = new THREE.BoxGeometry(0.7, 0.5, 0.7);
            const mat = new THREE.MeshStandardMaterial({ map: this.itemTextures.ammoClip });
            mesh = new THREE.Mesh(geo, mat);
        }

        mesh.position.set(x, y + 0.4, z);
        mesh.castShadow = true;
        this.engine.scene.add(mesh);

        const itemObj = {
            type,
            mesh,
            light,
            baseY: y + 0.4,
            rotationSpeed: 1.5,
            bobTimer: Math.random() * 5,
            isCollected: false
        };

        this.items.push(itemObj);
        return itemObj;
    }

    // ----------------------------------------------------
    // EXPLOSIVE TOXIC BARRELS
    // ----------------------------------------------------

    spawnMapBarrels() {
        const spawns = (this.map && this.map.spawns) ? this.map.spawns.barrels : (window.game && window.game.map ? window.game.map.spawns.barrels : []);
        if (!spawns || spawns.length === 0) return;

        for (let i = 0; i < spawns.length; i++) {
            const s = spawns[i];
            this.spawnBarrel(s.x, s.y, s.z);
        }
    }

    spawnBarrel(x, y, z) {
        const geo = new THREE.CylinderGeometry(0.55, 0.55, 1.4, 16);
        const mat = this.engine.materials.barrel;
        const mesh = new THREE.Mesh(geo, mat);
        mesh.position.set(x, y + 0.7, z);
        mesh.castShadow = true;
        mesh.receiveShadow = true;
        this.engine.scene.add(mesh);

        // Add to map colliders
        const min = new THREE.Vector3(x - 0.55, y, z - 0.55);
        const max = new THREE.Vector3(x + 0.55, y + 1.4, z + 0.55);
        const box = new THREE.Box3(min, max);
        this.engine.scene.colliders = this.engine.scene.colliders || [];

        const barrelObj = {
            mesh,
            box,
            hp: 20,
            isExploded: false,
            takeDamage: (dmg) => this.damageBarrel(barrelObj, dmg)
        };

        this.barrels.push(barrelObj);
        return barrelObj;
    }

    damageBarrel(b, amount) {
        if (b.isExploded) return;
        b.hp -= amount;
        if (b.hp <= 0) {
            this.explodeBarrel(b);
        }
    }

    explodeBarrel(b) {
        b.isExploded = true;
        const pos = b.mesh.position;

        this.sound.playExplosion(1.5);
        this.engine.spawnExplosion(pos, 5.5, 0x88ff00); // Toxic radioactive green blast!

        // Remove mesh
        this.engine.scene.remove(b.mesh);

        // Area Damage & Chain Reactions
        if (window.game && window.game.weapons) {
            window.game.weapons.applySplashDamage(pos, 180, 5.5);
        }
    }

    // ----------------------------------------------------
    // ITEM COLLECTION & UPDATE
    // ----------------------------------------------------

    update(delta) {
        const playerPos = this.player.position;

        for (let i = this.items.length - 1; i >= 0; i--) {
            const item = this.items[i];
            if (item.isCollected) continue;

            // Rotation & Bobbing Animation
            item.bobTimer += delta * 3.0;
            item.mesh.rotation.y += item.rotationSpeed * delta;
            item.mesh.position.y = item.baseY + Math.sin(item.bobTimer) * 0.15;
            if (item.light) {
                item.light.position.copy(item.mesh.position);
            }

            // Player proximity pickup check
            const dist = item.mesh.position.distanceTo(playerPos);
            if (dist < 1.6) {
                this.collectItem(item, i);
            }
        }
    }

    collectItem(item, index) {
        let collected = false;
        const type = item.type;

        if (type === 'medikit') {
            collected = this.player.heal(25);
            if (collected) this.sound.playItemPickup('health');
        } else if (type === 'soulsphere') {
            collected = this.player.heal(100, true);
            if (collected) {
                this.sound.playItemPickup('weapon');
                if (window.game && window.game.hud) window.game.hud.showNotification('SOULSPHERE! +100 HP');
            }
        } else if (type === 'armor_green') {
            collected = this.player.addArmor(100);
            if (collected) this.sound.playItemPickup('armor');
        } else if (type === 'armor_blue') {
            collected = this.player.addArmor(200, true);
            if (collected) this.sound.playItemPickup('armor');
        } else if (type === 'ammo_clip') {
            collected = this.player.addAmmo('bullets', 10);
            if (collected) this.sound.playItemPickup('ammo');
        } else if (type === 'ammo_box') {
            collected = this.player.addAmmo('bullets', 50);
            if (collected) this.sound.playItemPickup('ammo');
        } else if (type === 'ammo_shells') {
            collected = this.player.addAmmo('shells', 8);
            if (collected) this.sound.playItemPickup('ammo');
        } else if (type === 'ammo_rocket') {
            collected = this.player.addAmmo('rockets', 5);
            if (collected) this.sound.playItemPickup('ammo');
        } else if (type === 'ammo_cell') {
            collected = this.player.addAmmo('cells', 40);
            if (collected) this.sound.playItemPickup('ammo');
        } else if (type === 'shotgun') {
            this.player.addAmmo('shells', 8);
            if (window.game && window.game.weapons) window.game.weapons.unlockWeapon(2);
            collected = true;
            this.sound.playItemPickup('weapon');
            if (window.game && window.game.hud) window.game.hud.showNotification('YOU GOT THE SHOTGUN!');
        } else if (type === 'chaingun') {
            this.player.addAmmo('bullets', 40);
            if (window.game && window.game.weapons) window.game.weapons.unlockWeapon(3);
            collected = true;
            this.sound.playItemPickup('weapon');
            if (window.game && window.game.hud) window.game.hud.showNotification('YOU GOT THE CHAINGUN!');
        } else if (type === 'rocket_launcher') {
            this.player.addAmmo('rockets', 5);
            if (window.game && window.game.weapons) window.game.weapons.unlockWeapon(4);
            collected = true;
            this.sound.playItemPickup('weapon');
            if (window.game && window.game.hud) window.game.hud.showNotification('YOU GOT THE ROCKET LAUNCHER!');
        } else if (type === 'plasma') {
            this.player.addAmmo('cells', 50);
            if (window.game && window.game.weapons) window.game.weapons.unlockWeapon(5);
            collected = true;
            this.sound.playItemPickup('weapon');
            if (window.game && window.game.hud) window.game.hud.showNotification('YOU GOT THE PLASMA RIFLE!');
        } else if (type === 'bfg') {
            this.player.addAmmo('cells', 100);
            if (window.game && window.game.weapons) window.game.weapons.unlockWeapon(6);
            collected = true;
            this.sound.playItemPickup('weapon');
            if (window.game && window.game.hud) window.game.hud.showNotification('YOU GOT THE BFG 9000! OH YES.');
        } else if (type.startsWith('key_')) {
            const keyColor = type.replace('key_', '');
            this.player.keysInventory[keyColor] = true;
            collected = true;
            this.sound.playItemPickup('key');
            if (window.game && window.game.hud) window.game.hud.showNotification(`PICKED UP THE ${keyColor.toUpperCase()} KEYCARD`);
        }

        if (collected) {
            item.isCollected = true;
            this.engine.scene.remove(item.mesh);
            if (item.light) this.engine.scene.remove(item.light);
            this.items.splice(index, 1);
        }
    }
}

window.DoomItems = DoomItems;