import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { ghostApiClient } from './ghostApi';
import { Post, User, Member, Tier, Offer, Newsletter } from './models'; // Import data models

// Type definitions compatible with MCP SDK resource handler expectations
type Variables = Record<string, string | string[]>;
type ReadResourceTemplateCallback = (uri: URL, variables: Variables) => Promise<any>;

// Handler for the user resource
export const handleUserResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const userId = variables.user_id as string; // Access parameter from variables
        if (!userId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing user_id parameter");
        }
        // TODO: Use ghostApiClient to fetch user data by ID
        // const user: User = await ghostApiClient.users.read({ id: userId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(user, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `User resource requested for ID: ${userId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching user ${variables.user_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the member resource
export const handleMemberResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const memberId = variables.member_id as string; // Access parameter from variables
         if (!memberId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing member_id parameter");
        }
        // TODO: Use ghostApiClient to fetch member data by ID
        // const member: Member = await ghostApiClient.members.read({ id: memberId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(member, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Member resource requested for ID: ${memberId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching member ${variables.member_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the tier resource
export const handleTierResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const tierId = variables.tier_id as string; // Access parameter from variables
         if (!tierId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing tier_id parameter");
        }
        // TODO: Use ghostApiClient to fetch tier data by ID
        // const tier: Tier = await ghostApiClient.tiers.read({ id: tierId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(tier, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Tier resource requested for ID: ${tierId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching tier ${variables.tier_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the offer resource
export const handleOfferResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const offerId = variables.offer_id as string; // Access parameter from variables
         if (!offerId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing offer_id parameter");
        }
        // TODO: Use ghostApiClient to fetch offer data by ID
        // const offer: Offer = await ghostApiClient.offers.read({ id: offerId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(offer, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Offer resource requested for ID: ${offerId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching offer ${variables.offer_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the newsletter resource
export const handleNewsletterResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const newsletterId = variables.newsletter_id as string; // Access parameter from variables
         if (!newsletterId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing newsletter_id parameter");
        }
        // TODO: Use ghostApiClient to fetch newsletter data by ID
        // const newsletter: Newsletter = await ghostApiClient.newsletters.read({ id: newsletterId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(newsletter, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Newsletter resource requested for ID: ${newsletterId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching newsletter ${variables.newsletter_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the post resource
export const handlePostResource: ReadResourceTemplateCallback = async (uri: URL, variables: Variables): Promise<any> => {
    try {
        const postId = variables.post_id as string; // Access parameter from variables
         if (!postId) {
            // TODO: Return a structured MCP error for missing parameter
            throw new Error("Missing post_id parameter");
        }
        // TODO: Use ghostApiClient to fetch post data by ID
        // const post: Post = await ghostApiClient.posts.read({ id: postId });
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(post, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Post resource requested for ID: ${postId}`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching post ${variables.post_id}:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
};

// Handler for the blog info resource
export async function handleBlogInfoResource(uri: URL): Promise<any> {
    try {
        // TODO: Use ghostApiClient to fetch blog info
        // const blogInfo = await ghostApiClient.site.read();
        // return {
        //     contents: [{
        //         uri: uri.href,
        //         text: JSON.stringify(blogInfo, null, 2), // Or format as needed
        //         mimeType: 'application/json'
        //     }]
        // };
        return {
            contents: [{
                uri: uri.href,
                text: `Blog info resource requested`,
                mimeType: 'text/plain'
            }]
        };
    } catch (error) {
        console.error(`Error fetching blog info:`, error);
        // TODO: Return an error result in the MCP format
        throw error;
    }
}