import { firstLetterUpperCase } from "~~/shared/utils/text";

export function useExplanations(projectType: Ref<string>, stat: Ref<string>) {
	const explanation = computed(() => {
		return getExplanations(projectType.value, stat.value);
	});

	const title = computed(() => {
		return getTitle(projectType.value, stat.value);
	});

	const description = computed(() => {
		return getDescription(projectType.value, stat.value);
	});

	return { explanation, title, description };
}

function getTitle(type: string, stat: string): string | undefined {
	function getDescriptionContext(s: string, t: string): string {
		const statLower = s.toLowerCase();
		const typeLower = t.toLowerCase();

		switch (statLower) {
			case "downloads":
				return `Analyze ${typeLower} downloads overtime`;
			case "versions":
				return `Analyze number of ${typeLower} versions overtime`;
			case "count":
				return `Analyze number of ${typeLower} projects overtime`;
			default:
				return `${typeLower} ${statLower} analytics`;
		}
	}

	switch (type.toLowerCase()) {
		case "mod":
		case "plugin":
		case "datapack":
		case "shader":
		case "resourcepack":
		case "modpack":
			return `Modrinth ${firstLetterUpperCase(type)} ${firstLetterUpperCase(stat)} - ${getDescriptionContext(stat, type)}`;
		case "projects":
			return `Modrinth Projects Statistics - Platform Analytics`;
		case "versions":
			return `Modrinth Versions Statistics - Platform Analytics`;
		case "authors":
			return `Modrinth Authors Statistics - Platform Analytics`;
		case "files":
			return `Modrinth Files Statistics - Platform Analytics`;
		case "revenue":
			return `Modrinth Revenue Statistics - Platform Analytics`;
	}
}

function getDescription(type: string, stat: string): string | undefined {
	function getDescriptionContext(s: string, t: string): string {
		const statLower = s.toLowerCase();
		const typeLower = t.toLowerCase();

		switch (statLower) {
			case "downloads":
				return `${typeLower} download trends and popularity across minecraft verions and modding loaders`;
			case "versions":
				return `${typeLower} versions uploaded to modrinth across minecraft verions and modding loaders`;
			case "count":
				return `the total number of unique ${typeLower} projects on all of modrinth across minecraft verions and modding loaders`;
			default:
				return `${typeLower} ${statLower} analytics`;
		}
	}

	switch (type.toLowerCase()) {
		case "mod":
		case "plugin":
		case "datapack":
		case "shader":
		case "resourcepack":
		case "modpack":
			return `Analyze ${getDescriptionContext(stat, type)}. Get deep insights into game version growth, loader distribution (Fabric/Forge/Quilt), and community adoption.`;
		case "projects":
			return `Analyze how the number of unique projects on Modrinth has changed over time.`;
		case "versions":
			return `Analyze how the number of versions uploaded to Modrinth has changed over time.`;
		case "authors":
			return `Analyze how the number of unique authors on Modrinth has changed over time.`;
		case "files":
			return `Analyze how the number of files uploaded to Modrinth has changed over time.`;
		case "revenue":
			return `Analyze how the revenue generated by Modrinth has changed over time. See how much money has generated and distributed to creators.`;
	}
}

function getExplanations(type: string, stat: string): string | undefined {
	switch (type.toLowerCase()) {
		case "mod":
		case "plugin":
		case "datapack":
		case "shader":
		case "resourcepack":
		case "modpack":
			return getProjectStatsExplanation(stat, type);
		case "projects":
			return `
                <h4>Number of Projects across all ProjectTypes</h4>
                <p>This chart tracks the combined number of <strong>Mods, Plugins, Datapacks, Shaders, and Modpacks</strong>.
                It represents the overall scale of Modrinth and the amount of different content available to players.</p>
            `;
		case "versions":
			return `
			          <h4>Number of Versions across all ProjectTypes</h4>
                <p>This chart tracks the combined number of versions across <strong>Mods, Plugins, Datapacks, Shaders, and Modpacks</strong>. This metric highlights how active
                creators are in maintaining their content across all of Modrinth's supported project types.</p>
            `;
		case "authors":
			return `
			          <h4>Number of Authors on Modrinth</h4>
                <p>This tracks the number of unique developers and artists contributing to the platform.
                A growing author count indicates a healthy, expanding modding ecosystem.</p>
            `;
		case "files":
			return `
			          <h4>Number of Files hosted on Modrinth</h4>
                <p>The total count of individual files hosted on Modrinth. This reflects the massive
                amount of data managed by Modrinth.</p>
            `;
		case "revenue":
			return `
			          <h4>Revenue Generated by Modrinth in USD</h4>
                <p>Total revenue generated in USD. Modrinth operates on a <strong>creator-first model</strong>,
                where funds are split between platform maintenance and direct payouts to the developers who make the community possible.</p>
            `;
	}
}

function getProjectStatsExplanation(stat: string, type: string) {
	const typeUpper = firstLetterUpperCase(type);

	switch (stat.toLowerCase()) {
		case "versions":
			return `
                <h4>${typeUpper} Versions Support by each Loader/Game-Version</h4>
                <p>This tracks how many individual versions support specific loaders (like <strong>Fabric, Forge, or Quilt</strong>).
                A single version supporting three loaders will count three times here to accurately reflect loader availability.
                This can cause a bias though <strong>multi-loader</strong> projects, as they may increase popularity of niche loaders (such as Quilt) due to their cross-platform nature.</p>
            `;
		case "count":
			return `
                <h4>Number of ${typeUpper}s Supporting Each Loader/Game-Version</h4>
                <p>Unlike the versions metric, this tracks <strong>unique ${typeUpper}s</strong>. Even if a mod has 20 updates for
                Minecraft 1.20.1 or multiple versions within a version group, it is only counted once here to show the actual variety of projects available.
                A single mod supporting three loaders will count three times here to accurately reflect loader availability.
                This can cause a bias though <strong>multi-loader</strong> projects, as they may increase popularity of niche loaders (such as Quilt) due to their cross-platform nature.</p>
            `;
		case "downloads":
			return `
			          <h4>${typeUpper} Downloads per Loader/Game-Version</h4>
                <p>Analysis of downloads across different game versions and loaders. When a file supports multiple versions or loaders,
                downloads are split. This can cause a bias though <strong>multi-loader</strong> projects, as they may increase popularity of niche loaders (such as Quilt) due to their cross-platform nature.</p>
            `;
	}
}