/**
 * TUTORIAL SYSTEM
 * Shows helpful tips and keyboard shortcuts to new players
 */
class TutorialSystem {
    constructor(scene) {
        this.scene = scene;
        this.enabled = true;
        this.currentStep = 0;
        this.completed = false;

        // Tutorial steps
        this.steps = [
            {
                title: '💀 Welcome to Mrtva Dolina!',
                message: 'Use W/A/S/D to move around\nPress SPACE to attack\nPress E to interact with objects',
                icon: '👋',
                duration: 5000
            },
            {
                title: '🏗️ Building',
                message: 'Press B to enter Build Mode\nSelect buildings with 1-5\nClick to place buildings',
                icon: '🏗️',
                duration: 5000
            },
            {
                title: '🔨 Crafting',
                message: 'Press C to open Crafting Menu\nCraft tools and items\nUse resources from your inventory',
                icon: '🔨',
                duration: 5000
            },
            {
                title: '🎣 Fishing',
                message: 'Press R to cast fishing rod\nPress SPACE to catch fish\nUse LEFT/RIGHT to move bobber',
                icon: '🎣',
                duration: 5000
            },
            {
                title: '💾 Save & Load',
                message: 'Press F5 to Quick Save\nPress F9 to Load Game\nYour progress is saved automatically',
                icon: '💾',
                duration: 5000
            },
            {
                title: '📋 More Controls',
                message: 'Press TAB for Stats Panel\nPress M for Map\nPress ESC for Pause Menu\n\nPress H anytime for help!',
                icon: '⌨️',
                duration: 6000
            }
        ];

        // Load progress
        this.loadProgress();

        // Show tutorial if not completed
        if (!this.completed && this.enabled) {
            this.scene.time.delayedCall(2000, () => {
                this.showNextStep();
            });
        }

        console.log('📚 Tutorial System initialized');
    }

    /**
     * Show next tutorial step
     */
    showNextStep() {
        if (this.currentStep >= this.steps.length) {
            this.completeTutorial();
            return;
        }

        const step = this.steps[this.currentStep];
        this.showTutorialPopup(step);
        this.currentStep++;
    }

    /**
     * Show tutorial popup
     */
    showTutorialPopup(step) {
        const uiScene = this.scene.scene.get('UIScene');
        if (!uiScene) return;

        // Create container
        const container = uiScene.add.container(
            uiScene.scale.width / 2,
            uiScene.scale.height / 2
        );
        container.setDepth(99998); // Below epilepsy warning
        container.setScrollFactor(0);

        // Semi-transparent background
        const overlay = uiScene.add.rectangle(
            0, 0,
            uiScene.scale.width * 2,
            uiScene.scale.height * 2,
            0x000000, 0.5
        );
        container.add(overlay);

        // Popup background
        const bg = uiScene.add.graphics();
        bg.fillStyle(0x2a4a2a, 0.95); // Dark green
        bg.fillRoundedRect(-300, -150, 600, 300, 16);
        bg.lineStyle(4, 0x90EE90, 1); // Light green border
        bg.strokeRoundedRect(-300, -150, 600, 300, 16);
        container.add(bg);

        // Icon
        const icon = uiScene.add.text(-280, -130, step.icon, {
            fontSize: '48px'
        });
        container.add(icon);

        // Title
        const title = uiScene.add.text(0, -100, step.title, {
            fontSize: '28px',
            fontFamily: 'Arial',
            fill: '#FFD700',
            fontStyle: 'bold',
            align: 'center'
        }).setOrigin(0.5);
        container.add(title);

        // Message
        const message = uiScene.add.text(0, 0, step.message, {
            fontSize: '20px',
            fontFamily: 'Arial',
            fill: '#ffffff',
            align: 'center',
            lineSpacing: 8,
            wordWrap: { width: 550 }
        }).setOrigin(0.5);
        container.add(message);

        // Progress indicator
        const progress = uiScene.add.text(
            0, 100,
            `Step ${this.currentStep + 1} of ${this.steps.length}`,
            {
                fontSize: '14px',
                fill: '#aaaaaa'
            }
        ).setOrigin(0.5);
        container.add(progress);

        // Next button
        const nextBtn = uiScene.add.text(0, 130, '[ NEXT ]', {
            fontSize: '20px',
            color: '#00ff00',
            backgroundColor: '#003300',
            padding: { x: 30, y: 10 },
            fontStyle: 'bold'
        }).setOrigin(0.5);

        nextBtn.setInteractive({ useHandCursor: true });
        nextBtn.on('pointerover', () => nextBtn.setScale(1.1));
        nextBtn.on('pointerout', () => nextBtn.setScale(1.0));
        nextBtn.on('pointerdown', () => {
            container.destroy();
            this.showNextStep();
        });
        container.add(nextBtn);

        // Skip button
        const skipBtn = uiScene.add.text(250, -130, 'Skip Tutorial', {
            fontSize: '14px',
            color: '#888888'
        }).setOrigin(1, 0);

        skipBtn.setInteractive({ useHandCursor: true });
        skipBtn.on('pointerover', () => skipBtn.setColor('#ffffff'));
        skipBtn.on('pointerout', () => skipBtn.setColor('#888888'));
        skipBtn.on('pointerdown', () => {
            container.destroy();
            this.completeTutorial();
        });
        container.add(skipBtn);

        // Animate in
        container.setScale(0.8);
        container.setAlpha(0);
        uiScene.tweens.add({
            targets: container,
            scale: 1,
            alpha: 1,
            duration: 300,
            ease: 'Back.easeOut'
        });

        // Auto-advance after duration
        uiScene.time.delayedCall(step.duration, () => {
            if (container.active) {
                uiScene.tweens.add({
                    targets: container,
                    scale: 0.8,
                    alpha: 0,
                    duration: 200,
                    onComplete: () => {
                        container.destroy();
                        this.showNextStep();
                    }
                });
            }
        });
    }

    /**
     * Complete tutorial
     */
    completeTutorial() {
        this.completed = true;
        this.saveProgress();
        console.log('✅ Tutorial completed!');

        // Show completion message
        const uiScene = this.scene.scene.get('UIScene');
        if (uiScene && uiScene.centralPopup) {
            uiScene.centralPopup.showNotification(
                'Tutorial completed! Press H anytime for help.',
                'success'
            );
        }
    }

    /**
     * Show help popup (H key)
     */
    showHelp() {
        const uiScene = this.scene.scene.get('UIScene');
        if (!uiScene || !uiScene.centralPopup) return;

        uiScene.centralPopup.showPopup({
            title: '⌨️ Keyboard Shortcuts',
            message:
                '🎮 MOVEMENT:\n' +
                'W/A/S/D - Move\n' +
                'SPACE - Attack\n' +
                'E - Interact\n\n' +
                '🏗️ BUILD & CRAFT:\n' +
                'B - Build Mode\n' +
                'C - Crafting Menu\n\n' +
                '🎣 FISHING:\n' +
                'R - Cast Rod\n' +
                'SPACE - Catch Fish\n\n' +
                '💾 SAVE/LOAD:\n' +
                'F5 - Quick Save\n' +
                'F9 - Load Game\n\n' +
                '📋 OTHER:\n' +
                'TAB - Stats Panel\n' +
                'M - Map\n' +
                'ESC - Pause',
            type: 'info',
            icon: '📋',
            buttons: [{ text: 'OK', action: 'close' }],
            autoClose: false
        });
    }

    /**
     * Reset tutorial
     */
    reset() {
        this.currentStep = 0;
        this.completed = false;
        this.saveProgress();
        console.log('🔄 Tutorial reset');
    }

    /**
     * Save progress
     */
    saveProgress() {
        localStorage.setItem('novafarma_tutorial', JSON.stringify({
            completed: this.completed,
            currentStep: this.currentStep
        }));
    }

    /**
     * Load progress
     */
    loadProgress() {
        const saved = localStorage.getItem('novafarma_tutorial');
        if (saved) {
            const data = JSON.parse(saved);
            this.completed = data.completed || false;
            this.currentStep = data.currentStep || 0;
        }
    }
}