// Game Renderer - handles all canvas drawing operations

import { GameState, Block, Enemy, PlayerState, Position } from './types';
import { GAME_CONFIG } from '../constants';
import { LevelTheme } from './LevelManager';

const { CANVAS_WIDTH, CANVAS_HEIGHT, TILE_SIZE, COLORS } = GAME_CONFIG;

const THEME_COLORS = {
    overworld: { sky: COLORS.SKY, ground: COLORS.GROUND },
    underground: { sky: '#1a1a2e', ground: '#4a4a4a' },
    castle: { sky: '#2d1b1b', ground: '#5a3030' },
};

export class Renderer {
    private ctx: CanvasRenderingContext2D;
    private animationFrame: number = 0;

    constructor(ctx: CanvasRenderingContext2D) {
        this.ctx = ctx;
    }

    private currentTheme: LevelTheme = 'overworld';

    clear(): void {
        // Draw sky background based on theme
        this.ctx.fillStyle = THEME_COLORS[this.currentTheme].sky;
        this.ctx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);
    }

    drawClouds(cameraX: number): void {
        this.ctx.fillStyle = '#ffffff';
        const clouds = [
            { x: 100, y: 60, width: 80, height: 30 },
            { x: 400, y: 80, width: 100, height: 35 },
            { x: 700, y: 50, width: 70, height: 25 },
            { x: 1100, y: 70, width: 90, height: 30 },
            { x: 1500, y: 55, width: 75, height: 28 },
            { x: 1900, y: 85, width: 85, height: 32 },
            { x: 2300, y: 60, width: 95, height: 35 },
            { x: 2700, y: 75, width: 80, height: 30 },
        ];

        clouds.forEach(cloud => {
            const screenX = cloud.x - cameraX * 0.3; // Parallax effect
            if (screenX > -cloud.width && screenX < CANVAS_WIDTH + cloud.width) {
                // Draw cloud as overlapping circles
                this.ctx.beginPath();
                this.ctx.arc(screenX, cloud.y, cloud.height * 0.6, 0, Math.PI * 2);
                this.ctx.arc(screenX + cloud.width * 0.3, cloud.y - 5, cloud.height * 0.7, 0, Math.PI * 2);
                this.ctx.arc(screenX + cloud.width * 0.6, cloud.y, cloud.height * 0.5, 0, Math.PI * 2);
                this.ctx.fill();
            }
        });
    }

    drawBlock(block: Block, cameraX: number): void {
        const screenX = block.x - cameraX;

        // Skip if off screen
        if (screenX < -block.width || screenX > CANVAS_WIDTH) return;

        switch (block.type) {
            case 'ground':
                this.drawGroundBlock(screenX, block.y, block.width, block.height);
                break;
            case 'brick':
                this.drawBrickBlock(screenX, block.y, block.width, block.height);
                break;
            case 'question':
                this.drawQuestionBlock(screenX, block.y, block.width, block.height, block.isHit);
                break;
            case 'pipe':
                this.drawPipe(screenX, block.y, block.width, block.height);
                break;
            case 'coin':
                this.drawCoin(screenX, block.y, block.width, block.height);
                break;
        }
    }

    private drawGroundBlock(x: number, y: number, width: number, height: number): void {
        // Main color
        this.ctx.fillStyle = COLORS.GROUND;
        this.ctx.fillRect(x, y, width, height);

        // Texture pattern
        this.ctx.fillStyle = '#8B4513';
        this.ctx.fillRect(x + 2, y + 2, 4, 4);
        this.ctx.fillRect(x + width - 8, y + height - 8, 4, 4);
        this.ctx.fillRect(x + width / 2, y + height / 2 - 2, 3, 3);

        // Border
        this.ctx.strokeStyle = '#5a3000';
        this.ctx.lineWidth = 1;
        this.ctx.strokeRect(x, y, width, height);
    }

    private drawBrickBlock(x: number, y: number, width: number, height: number): void {
        this.ctx.fillStyle = COLORS.BRICK;
        this.ctx.fillRect(x, y, width, height);

        // Brick pattern
        this.ctx.strokeStyle = '#5a3000';
        this.ctx.lineWidth = 2;
        this.ctx.strokeRect(x, y, width, height);

        // Horizontal line
        this.ctx.beginPath();
        this.ctx.moveTo(x, y + height / 2);
        this.ctx.lineTo(x + width, y + height / 2);
        this.ctx.stroke();

        // Vertical lines
        this.ctx.beginPath();
        this.ctx.moveTo(x + width / 2, y);
        this.ctx.lineTo(x + width / 2, y + height / 2);
        this.ctx.stroke();

        this.ctx.beginPath();
        this.ctx.moveTo(x + width / 4, y + height / 2);
        this.ctx.lineTo(x + width / 4, y + height);
        this.ctx.stroke();

        this.ctx.beginPath();
        this.ctx.moveTo(x + width * 3 / 4, y + height / 2);
        this.ctx.lineTo(x + width * 3 / 4, y + height);
        this.ctx.stroke();
    }

    private drawQuestionBlock(x: number, y: number, width: number, height: number, isHit?: boolean): void {
        // Animate if not hit
        const bounce = isHit ? 0 : Math.sin(this.animationFrame * 0.1) * 2;

        this.ctx.fillStyle = isHit ? '#8B7355' : COLORS.QUESTION;
        this.ctx.fillRect(x, y + bounce, width, height);

        // Border
        this.ctx.strokeStyle = '#8B4513';
        this.ctx.lineWidth = 2;
        this.ctx.strokeRect(x, y + bounce, width, height);

        // Question mark or empty
        this.ctx.fillStyle = isHit ? '#666' : '#fff';
        this.ctx.font = 'bold 20px Arial';
        this.ctx.textAlign = 'center';
        this.ctx.textBaseline = 'middle';
        this.ctx.fillText(isHit ? '' : '?', x + width / 2, y + height / 2 + bounce);
    }

    private drawPipe(x: number, y: number, width: number, height: number): void {
        // Pipe body
        this.ctx.fillStyle = COLORS.PIPE;
        this.ctx.fillRect(x, y, width, height);

        // Pipe rim (top part is wider)
        if (y <= GAME_CONFIG.LEVEL_HEIGHT - TILE_SIZE * 2 - height + TILE_SIZE) {
            this.ctx.fillStyle = '#00c800';
            this.ctx.fillRect(x - 4, y, width + 8, TILE_SIZE / 2);
        }

        // Highlights
        this.ctx.fillStyle = '#00e000';
        this.ctx.fillRect(x + 4, y, 8, height);

        // Shadow
        this.ctx.fillStyle = '#006800';
        this.ctx.fillRect(x + width - 8, y, 6, height);

        // Border
        this.ctx.strokeStyle = '#004000';
        this.ctx.lineWidth = 2;
        this.ctx.strokeRect(x, y, width, height);
    }

    private drawCoin(x: number, y: number, width: number, height: number): void {
        // Animate coin
        const scale = 0.7 + Math.abs(Math.sin(this.animationFrame * 0.15)) * 0.3;
        const centerX = x + width / 2;
        const centerY = y + height / 2;

        this.ctx.save();
        this.ctx.translate(centerX, centerY);
        this.ctx.scale(scale, 1);

        // Coin circle
        this.ctx.beginPath();
        this.ctx.arc(0, 0, width / 2 - 2, 0, Math.PI * 2);
        this.ctx.fillStyle = COLORS.COIN;
        this.ctx.fill();
        this.ctx.strokeStyle = '#cc9900';
        this.ctx.lineWidth = 2;
        this.ctx.stroke();

        // Inner detail
        this.ctx.beginPath();
        this.ctx.arc(0, 0, width / 4, 0, Math.PI * 2);
        this.ctx.strokeStyle = '#ffeb3b';
        this.ctx.stroke();

        this.ctx.restore();
    }

    drawPlayer(player: PlayerState, cameraX: number): void {
        const screenX = player.x - cameraX;

        if (!player.isAlive) {
            // Death animation - player falling
            this.ctx.save();
            this.ctx.globalAlpha = 0.7;
        }

        // Body (blue overalls)
        this.ctx.fillStyle = COLORS.MARIO_BLUE;
        this.ctx.fillRect(screenX + 4, player.y + 20, 24, 28);

        // Head
        this.ctx.fillStyle = COLORS.MARIO_SKIN;
        this.ctx.fillRect(screenX + 6, player.y + 4, 20, 16);

        // Hat
        this.ctx.fillStyle = COLORS.MARIO_RED;
        this.ctx.fillRect(screenX + 4, player.y, 24, 8);
        if (player.facingRight) {
            this.ctx.fillRect(screenX + 24, player.y + 4, 6, 6);
        } else {
            this.ctx.fillRect(screenX + 2, player.y + 4, 6, 6);
        }

        // Eyes
        this.ctx.fillStyle = '#000';
        if (player.facingRight) {
            this.ctx.fillRect(screenX + 18, player.y + 8, 4, 4);
        } else {
            this.ctx.fillRect(screenX + 10, player.y + 8, 4, 4);
        }

        // Mustache
        this.ctx.fillStyle = '#4a2800';
        this.ctx.fillRect(screenX + 8, player.y + 14, 16, 4);

        // Buttons on overalls
        this.ctx.fillStyle = COLORS.COIN;
        this.ctx.fillRect(screenX + 10, player.y + 24, 4, 4);
        this.ctx.fillRect(screenX + 18, player.y + 24, 4, 4);

        if (!player.isAlive) {
            this.ctx.restore();
        }
    }

    drawEnemy(enemy: Enemy, cameraX: number): void {
        const screenX = enemy.x - cameraX;

        // Skip if off screen
        if (screenX < -enemy.width || screenX > CANVAS_WIDTH) return;

        if (!enemy.isAlive) return;

        if (enemy.type === 'koopa') {
            this.drawKoopa(screenX, enemy);
            return;
        }

        // Goomba body
        this.ctx.fillStyle = COLORS.GOOMBA;

        // Head (mushroom shape)
        this.ctx.beginPath();
        this.ctx.arc(screenX + enemy.width / 2, enemy.y + 10, 14, Math.PI, 0);
        this.ctx.fill();

        // Body
        this.ctx.fillRect(screenX + 4, enemy.y + 10, enemy.width - 8, 14);

        // Feet (animated)
        const footOffset = Math.sin(this.animationFrame * 0.3) * 2;
        this.ctx.fillStyle = '#000';
        this.ctx.fillRect(screenX + 2, enemy.y + 24, 10, 8 + footOffset);
        this.ctx.fillRect(screenX + enemy.width - 12, enemy.y + 24, 10, 8 - footOffset);

        // Eyes
        this.ctx.fillStyle = '#fff';
        this.ctx.fillRect(screenX + 8, enemy.y + 8, 6, 8);
        this.ctx.fillRect(screenX + enemy.width - 14, enemy.y + 8, 6, 8);

        // Pupils
        this.ctx.fillStyle = '#000';
        const pupilOffset = enemy.direction > 0 ? 2 : 0;
        this.ctx.fillRect(screenX + 10 + pupilOffset, enemy.y + 12, 3, 4);
        this.ctx.fillRect(screenX + enemy.width - 13 + pupilOffset, enemy.y + 12, 3, 4);

        // Eyebrows (angry)
        this.ctx.strokeStyle = '#000';
        this.ctx.lineWidth = 2;
        this.ctx.beginPath();
        this.ctx.moveTo(screenX + 6, enemy.y + 6);
        this.ctx.lineTo(screenX + 14, enemy.y + 8);
        this.ctx.stroke();
        this.ctx.beginPath();
        this.ctx.moveTo(screenX + enemy.width - 6, enemy.y + 6);
        this.ctx.lineTo(screenX + enemy.width - 14, enemy.y + 8);
        this.ctx.stroke();
    }

    private drawKoopa(screenX: number, enemy: Enemy): void {
        // Shell (green)
        this.ctx.fillStyle = '#00aa00';
        this.ctx.beginPath();
        this.ctx.ellipse(screenX + enemy.width / 2, enemy.y + enemy.height - 12, 14, 10, 0, 0, Math.PI * 2);
        this.ctx.fill();

        // Shell pattern
        this.ctx.strokeStyle = '#006600';
        this.ctx.lineWidth = 2;
        this.ctx.beginPath();
        this.ctx.arc(screenX + enemy.width / 2, enemy.y + enemy.height - 12, 8, 0, Math.PI * 2);
        this.ctx.stroke();

        // Head
        this.ctx.fillStyle = '#ffcc00';
        this.ctx.beginPath();
        this.ctx.arc(screenX + enemy.width / 2, enemy.y + 10, 10, 0, Math.PI * 2);
        this.ctx.fill();

        // Eyes
        this.ctx.fillStyle = '#fff';
        this.ctx.fillRect(screenX + enemy.width / 2 - 6, enemy.y + 6, 5, 6);
        this.ctx.fillRect(screenX + enemy.width / 2 + 1, enemy.y + 6, 5, 6);

        // Pupils
        this.ctx.fillStyle = '#000';
        const pupilOffset = enemy.direction > 0 ? 2 : 0;
        this.ctx.fillRect(screenX + enemy.width / 2 - 4 + pupilOffset, enemy.y + 8, 2, 3);
        this.ctx.fillRect(screenX + enemy.width / 2 + 2 + pupilOffset, enemy.y + 8, 2, 3);

        // Feet
        const footOffset = Math.sin(this.animationFrame * 0.3) * 2;
        this.ctx.fillStyle = '#ffcc00';
        this.ctx.fillRect(screenX + 4, enemy.y + enemy.height - 6, 8, 6 + footOffset);
        this.ctx.fillRect(screenX + enemy.width - 12, enemy.y + enemy.height - 6, 8, 6 - footOffset);
    }

    drawFlag(position: Position, cameraX: number): void {
        const screenX = position.x - cameraX;

        // Skip if off screen
        if (screenX < -100 || screenX > CANVAS_WIDTH + 100) return;

        // Flag pole
        this.ctx.fillStyle = '#00aa00';
        this.ctx.fillRect(screenX, position.y, 8, GAME_CONFIG.LEVEL_HEIGHT - position.y - TILE_SIZE * 2);

        // Pole ball on top
        this.ctx.beginPath();
        this.ctx.arc(screenX + 4, position.y - 5, 8, 0, Math.PI * 2);
        this.ctx.fillStyle = COLORS.COIN;
        this.ctx.fill();

        // Flag
        const flagWave = Math.sin(this.animationFrame * 0.1) * 3;
        this.ctx.fillStyle = COLORS.FLAG;
        this.ctx.beginPath();
        this.ctx.moveTo(screenX + 8, position.y);
        this.ctx.lineTo(screenX + 50 + flagWave, position.y + 20);
        this.ctx.lineTo(screenX + 8, position.y + 40);
        this.ctx.closePath();
        this.ctx.fill();

        // Star on flag
        this.ctx.fillStyle = '#fff';
        this.ctx.font = '16px Arial';
        this.ctx.fillText('★', screenX + 22 + flagWave / 2, position.y + 25);
    }

    drawUI(player: PlayerState, levelNumber: number = 1): void {
        // UI Background
        this.ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
        this.ctx.fillRect(10, 10, 280, 60);

        // Score
        this.ctx.fillStyle = '#fff';
        this.ctx.font = 'bold 16px "Press Start 2P", monospace';
        this.ctx.textAlign = 'left';
        this.ctx.fillText(`SCORE`, 20, 32);
        this.ctx.fillText(`${player.score.toString().padStart(6, '0')}`, 20, 52);

        // Coins
        this.ctx.fillStyle = COLORS.COIN;
        this.ctx.beginPath();
        this.ctx.arc(150, 35, 10, 0, Math.PI * 2);
        this.ctx.fill();

        this.ctx.fillStyle = '#fff';
        this.ctx.fillText(`×${player.coins}`, 165, 40);

        // Level indicator
        this.ctx.fillStyle = '#fff';
        this.ctx.fillText(`WORLD`, 220, 32);
        this.ctx.fillText(`1-${levelNumber}`, 220, 52);
    }

    update(): void {
        this.animationFrame++;
    }

    render(state: GameState, theme: LevelTheme = 'overworld', levelNumber: number = 1): void {
        this.currentTheme = theme;
        this.clear();

        // Only draw clouds in overworld
        if (theme === 'overworld') {
            this.drawClouds(state.camera.x);
        }

        // Draw all blocks
        state.blocks.forEach(block => this.drawBlock(block, state.camera.x));

        // Draw flag
        this.drawFlag(state.level.flagPosition, state.camera.x);

        // Draw enemies
        state.enemies.forEach(enemy => this.drawEnemy(enemy, state.camera.x));

        // Draw player
        this.drawPlayer(state.player, state.camera.x);

        // Draw UI
        this.drawUI(state.player, levelNumber);

        this.update();
    }
}