// src/routes/resources/history.ts
import { FastifyInstance } from "fastify";

const columnMap: Record<string, string> = {
    customers: "customer",
    vendors: "vendor",
    projects: "project",
    plants: "plant",
    contracts: "contract",
    contacts: "contact",
    tasks: "task",
    vehicles: "vehicle",
    events: "event",
    files: "file",
    products: "product",
    inventoryitems: "inventoryitem",
    inventoryitemgroups: "inventoryitemgroup",
    absencerequests: "absencerequest",
    checks: "check",
    costcentres: "costcentre",
    ownaccounts: "ownaccount",
    documentboxes: "documentbox",
    hourrates: "hourrate",
    services: "service",
    roles: "role",
};

export default async function resourceHistoryRoutes(server: FastifyInstance) {
    server.get<{
        Params: { resource: string; id: string }
    }>("/resource/:resource/:id/history", {
        schema: {
            tags: ["History"],
            summary: "Get history entries for a resource",
            params: {
                type: "object",
                required: ["resource", "id"],
                properties: {
                    resource: { type: "string" },
                    id: { type: "string" },
                },
            },
        },
    }, async (req, reply) => {
        const { resource, id } = req.params;

        const column = columnMap[resource];
        if (!column) {
            return reply.code(400).send({ error: `History not supported for resource '${resource}'` });
        }

        const { data, error } = await server.supabase
            .from("historyitems")
            .select("*")
            .eq(column, id)
            .order("created_at", { ascending: true });

        if (error) {
            server.log.error(error);
            return reply.code(500).send({ error: "Failed to fetch history" });
        }

        const {data:users, error:usersError} = await server.supabase
            .from("auth_users")
            .select("*, auth_profiles(*), tenants!auth_tenant_users(*)")

        const filteredUsers = (users ||[]).filter(i => i.tenants.find((t:any) => t.id === req.user?.tenant_id))

        const dataCombined = data.map(historyitem => {
            return {
                ...historyitem,
                created_by_profile: filteredUsers.find(i => i.id === historyitem.created_by) ? filteredUsers.find(i => i.id === historyitem.created_by).auth_profiles[0] : null
            }
        })



        return dataCombined;
    });

    // Neuen HistoryItem anlegen
    server.post<{
        Params: { resource: string; id: string };
        Body: {
            text: string;
            old_val?: string | null;
            new_val?: string | null;
            config?: Record<string, any>;
        };
    }>("/resource/:resource/:id/history", {
        schema: {
            tags: ["History"],
            summary: "Create new history entry",
            params: {
                type: "object",
                properties: {
                    resource: { type: "string" },
                    id: { type: "string" }
                },
                required: ["resource", "id"]
            },
            body: {
                type: "object",
                properties: {
                    text: { type: "string" },
                    old_val: { type: "string", nullable: true },
                    new_val: { type: "string", nullable: true },
                    config: { type: "object", nullable: true }
                },
                required: ["text"]
            },
            response: {
                201: {
                    type: "object",
                    properties: {
                        id: { type: "number" },
                        text: { type: "string" },
                        created_at: { type: "string" },
                        created_by: { type: "string" }
                    }
                }
            }
        }
    }, async (req, reply) => {
        const { resource, id } = req.params;
        const { text, old_val, new_val, config } = req.body;

        const userId = (req.user as any)?.user_id;


        const fkField = columnMap[resource];
        if (!fkField) {
            return reply.code(400).send({ error: `Unknown resource: ${resource}` });
        }

        const { data, error } = await server.supabase
            .from("historyitems")
            .insert({
                text,
                [fkField]: id,
                oldVal: old_val || null,
                newVal: new_val || null,
                config: config || null,
                tenant: (req.user as any)?.tenant_id,
                created_by: userId
            })
            .select()
            .single();

        if (error) {
            return reply.code(500).send({ error: error.message });
        }

        return reply.code(201).send(data);
    });
}