import { EmbedBuilder, ActionRowBuilder, ButtonBuilder, ButtonStyle, StringSelectMenuBuilder, StringSelectMenuOptionBuilder } from "discord.js";

/**
 * Quest entry with quest details and progress
 */
interface QuestEntry {
    progress: number | null;
    completedAt: Date | null;
    quest: {
        id: number;
        name: string;
        description: string | null;
        triggerEvent: string;
        requirements: any;
        rewards: any;
    };
}

/**
 * Available quest interface
 */
interface AvailableQuest {
    id: number;
    name: string;
    description: string | null;
    rewards: any;
    requirements: any;
}

/**
 * Formats quest rewards object into a human-readable string
 */
function formatQuestRewards(rewards: { xp?: number, balance?: number }): string {
    const rewardStr: string[] = [];
    if (rewards?.xp) rewardStr.push(`${rewards.xp} XP`);
    if (rewards?.balance) rewardStr.push(`${rewards.balance} 🪙`);
    return rewardStr.join(", ");
}

/**
 * Returns the quest status display string
 */
function getQuestStatus(completedAt: Date | null): string {
    return completedAt ? "✅ Completed" : "📝 In Progress";
}

/**
 * Renders a simple progress bar
 */
function renderProgressBar(current: number, total: number, size: number = 10): string {
    const percentage = Math.min(current / total, 1);
    const progress = Math.round(size * percentage);
    const empty = size - progress;

    const progressText = "▰".repeat(progress);
    const emptyText = "▱".repeat(empty);

    return `${progressText}${emptyText} ${Math.round(percentage * 100)}% (${current}/${total})`;
}

/**
 * Creates an embed displaying a user's quest log
 */
export function getQuestListEmbed(userQuests: QuestEntry[]): EmbedBuilder {
    const embed = new EmbedBuilder()
        .setTitle("📜 Quest Log")
        .setDescription("Your active and completed quests.")
        .setColor(0x3498db); // Blue

    if (userQuests.length === 0) {
        embed.setDescription("You have no active quests. Check available quests!");
    }

    userQuests.forEach(entry => {
        const status = getQuestStatus(entry.completedAt);
        const rewards = entry.quest.rewards as { xp?: number, balance?: number };
        const rewardsText = formatQuestRewards(rewards);
        
        const requirements = entry.quest.requirements as { target?: number };
        const target = requirements?.target || 1;
        const progress = entry.progress || 0;

        const progressBar = entry.completedAt ? "✅ Fully completed" : renderProgressBar(progress, target);

        embed.addFields({
            name: `${entry.quest.name} (${status})`,
            value: `${entry.quest.description}\n**Rewards:** ${rewardsText}\n**Progress:** ${progressBar}`,
            inline: false
        });
    });

    return embed;
}

/**
 * Creates an embed for available quests
 */
export function getAvailableQuestsEmbed(availableQuests: AvailableQuest[]): EmbedBuilder {
    const embed = new EmbedBuilder()
        .setTitle("🗺️ Available Quests")
        .setDescription("Quests you can accept right now.")
        .setColor(0x2ecc71); // Green

    if (availableQuests.length === 0) {
        embed.setDescription("There are no new quests available for you at the moment.");
    }

    availableQuests.forEach(quest => {
        const rewards = quest.rewards as { xp?: number, balance?: number };
        const rewardsText = formatQuestRewards(rewards);
        
        const requirements = quest.requirements as { target?: number };
        const target = requirements?.target || 1;

        embed.addFields({
            name: quest.name,
            value: `${quest.description}\n**Goal:** Reach ${target} for this activity.\n**Rewards:** ${rewardsText}`,
            inline: false
        });
    });

    return embed;
}

/**
 * Returns action rows for the quest view
 */
export function getQuestActionRows(viewType: 'active' | 'available', availableQuests: AvailableQuest[] = []): ActionRowBuilder<any>[] {
    const rows: ActionRowBuilder<any>[] = [];

    const navRow = new ActionRowBuilder<ButtonBuilder>().addComponents(
        new ButtonBuilder()
            .setCustomId("quest_view_active")
            .setLabel("Active Quests")
            .setStyle(viewType === 'active' ? ButtonStyle.Primary : ButtonStyle.Secondary)
            .setDisabled(viewType === 'active'),
        new ButtonBuilder()
            .setCustomId("quest_view_available")
            .setLabel("Available Quests")
            .setStyle(viewType === 'available' ? ButtonStyle.Primary : ButtonStyle.Secondary)
            .setDisabled(viewType === 'available')
    );
    rows.push(navRow);

    if (viewType === 'available' && availableQuests.length > 0) {
        const selectMenu = new StringSelectMenuBuilder()
            .setCustomId("quest_accept_select")
            .setPlaceholder("Select a quest to accept")
            .addOptions(
                availableQuests.slice(0, 25).map(q => 
                    new StringSelectMenuOptionBuilder()
                        .setLabel(q.name)
                        .setDescription(q.description?.substring(0, 100) || "")
                        .setValue(q.id.toString())
                )
            );
        
        rows.push(new ActionRowBuilder().addComponents(selectMenu));
    }

    return rows;
}