/**
 * PERENNIAL CROPS SYSTEM
 * Handles multi-season crops like Apple Trees
 */
class PerennialCropSystem {
    constructor(scene) {
        this.scene = scene;
        this.perennials = []; // Array of perennial objects

        // Perennial definitions
        this.perennialData = {
            'apple_tree': {
                name: 'Apple Tree',
                growthTime: 120000, // 2 minutes to maturity
                harvestSeason: 'autumn', // Only harvest in autumn
                harvestYield: { 'apple': 5 },
                regrowthTime: 30000, // 30s to regrow apples
                texture: 'apple_tree',
                stages: ['sapling', 'young', 'mature', 'fruiting']
            }
        };
    }

    /**
     * Plant a perennial crop
     */
    plant(gridX, gridY, type) {
        if (!this.perennialData[type]) {
            console.error('Unknown perennial type:', type);
            return false;
        }

        const perennial = {
            type,
            gridX,
            gridY,
            plantedTime: Date.now(),
            stage: 0, // 0=sapling, 1=young, 2=mature, 3=fruiting
            canHarvest: false,
            sprite: null,
            healthBar: null
        };

        this.perennials.push(perennial);
        this.createSprite(perennial);
        console.log(`🌳 Planted ${type} at ${gridX},${gridY}`);
        return true;
    }

    createSprite(perennial) {
        const data = this.perennialData[perennial.type];
        const screenPos = this.scene.iso.toScreen(perennial.gridX, perennial.gridY);

        // Create tree sprite
        perennial.sprite = this.scene.add.sprite(
            screenPos.x + this.scene.terrainOffsetX,
            screenPos.y + this.scene.terrainOffsetY,
            data.texture || 'tree'
        );
        perennial.sprite.setOrigin(0.5, 1);
        perennial.sprite.setScale(0.5);
        perennial.sprite.setDepth(this.scene.iso.getDepth(perennial.gridX, perennial.gridY, this.scene.iso.LAYER_OBJECTS));

        this.updateSprite(perennial);
    }

    updateSprite(perennial) {
        const data = this.perennialData[perennial.type];

        // Update tint based on stage
        if (perennial.stage === 0) {
            perennial.sprite.setTint(0x88aa88); // Light green (sapling)
            perennial.sprite.setScale(0.3);
        } else if (perennial.stage === 1) {
            perennial.sprite.setTint(0x44aa44); // Medium green (young)
            perennial.sprite.setScale(0.4);
        } else if (perennial.stage === 2) {
            perennial.sprite.clearTint(); // Normal (mature)
            perennial.sprite.setScale(0.5);
        } else if (perennial.stage === 3) {
            perennial.sprite.setTint(0xff8844); // Orange tint (fruiting)
            perennial.sprite.setScale(0.5);
        }
    }

    update(delta, currentSeason) {
        this.perennials.forEach(perennial => {
            const data = this.perennialData[perennial.type];
            const age = Date.now() - perennial.plantedTime;

            // Growth stages
            if (perennial.stage < 3) {
                const stageTime = data.growthTime / 3;
                const newStage = Math.min(3, Math.floor(age / stageTime));

                if (newStage !== perennial.stage) {
                    perennial.stage = newStage;
                    this.updateSprite(perennial);

                    if (perennial.stage === 3) {
                        console.log(`🌳 ${data.name} reached maturity!`);
                    }
                }
            }

            // Fruiting logic (only in correct season and when mature)
            if (perennial.stage === 3 && currentSeason === data.harvestSeason) {
                if (!perennial.canHarvest) {
                    perennial.canHarvest = true;
                    perennial.sprite.setTint(0xff6644); // Bright orange (ready to harvest)
                }
            } else if (perennial.canHarvest && currentSeason !== data.harvestSeason) {
                perennial.canHarvest = false;
                perennial.sprite.clearTint();
            }
        });
    }

    /**
     * Attempt to harvest perennial
     */
    harvest(gridX, gridY) {
        const perennial = this.perennials.find(p =>
            p.gridX === gridX && p.gridY === gridY
        );

        if (!perennial) return null;

        if (!perennial.canHarvest) {
            return { error: 'Not ready to harvest' };
        }

        const data = this.perennialData[perennial.type];

        // Reset harvest state (will regrow)
        perennial.canHarvest = false;
        perennial.sprite.setTint(0x88aa88); // Back to green

        console.log(`🍎 Harvested ${data.name}!`);
        return data.harvestYield;
    }

    /**
     * Check if position has perennial
     */
    hasPerennial(gridX, gridY) {
        return this.perennials.some(p => p.gridX === gridX && p.gridY === gridY);
    }

    /**
     * Get perennial at position
     */
    getPerennial(gridX, gridY) {
        return this.perennials.find(p => p.gridX === gridX && p.gridY === gridY);
    }

    destroy() {
        this.perennials.forEach(p => {
            if (p.sprite) p.sprite.destroy();
        });
        this.perennials = [];
    }
}