import { Hono, type Context } from 'hono';
import { fromHono, OpenAPIRoute, contentJson } from 'chanfana';
import { z } from 'zod';

export type Env = {
    DB: D1Database;
};
export type AppContext = Context<{ Bindings: Env }>;

class HelloEndpoint extends OpenAPIRoute {
    schema = {
        responses: {
            "200": {
                description: 'Successful response',
                ...contentJson(z.object({ message: z.string() })),
            },
        },
    };

    async handle(c: AppContext) {
        return { message: 'Hello, Chanfana!' };
    }
}

const app = new Hono<{ Bindings: Env }>();
const openapi = fromHono(app);
openapi.get('/hello', HelloEndpoint);

export default app;

import { Router } from 'itty-router';
import { fromIttyRouter, OpenAPIRoute, contentJson } from 'chanfana';
import { z } from 'zod';

class HelloEndpoint extends OpenAPIRoute {
    schema = {
        responses: {
            "200": {
                description: 'Successful response',
                ...contentJson(z.object({ message: z.string() })),
            },
        },
    };

    async handle(request: Request, env, ctx) {
        return { message: 'Hello, Chanfana!' };
    }
}

const router = Router();
const openapi = fromIttyRouter(router);
openapi.get('/hello', HelloEndpoint);
router.all('*', () => new Response("Not Found.", { status: 404 }));

export const fetch = router.handle;

import { OpenAPIRoute, contentJson } from 'chanfana';
import { z } from 'zod';

class CreateUserEndpoint extends OpenAPIRoute {
    schema = {
        request: {
            body: contentJson(z.object({
                username: z.string().min(3).max(20),
                password: z.string().min(8),
                email: z.email(),
                fullName: z.string().optional(),
            })),
            query: z.object({
                notify: z.boolean().optional().default(true),
            }),
            params: z.object({
                orgId: z.uuid(),
            }),
            headers: z.object({
                'X-API-Key': z.string(),
            }),
        },
        responses: {
            "200": {
                description: 'User created successfully',
                ...contentJson(z.object({
                    id: z.uuid(),
                    username: z.string(),
                    email: z.email(),
                })),
            },
            "400": {
                description: 'Validation error',
                ...contentJson(z.object({
                    success: z.literal(false),
                    errors: z.array(z.object({
                        code: z.number(),
                        message: z.string(),
                    })),
                })),
            },
        },
    };

    async handle(c) {
        const data = await this.getValidatedData<typeof this.schema>();
        // data.body, data.query, data.params, data.headers are all typed
        return { id: crypto.randomUUID(), username: data.body.username, email: data.body.email };
    }
}

// WRONG - Zod v3 syntax (deprecated)
z.string().email()
z.string().uuid()
z.string().datetime()
z.string().date()
z.string().url()
z.string().ip({ version: "v4" })
z.object({}).strict()
z.nativeEnum(MyEnum)

// CORRECT - Zod v4 syntax
z.email()
z.uuid()
z.iso.datetime()
z.iso.date()
z.url()
z.ipv4()
z.strictObject({})
z.enum(['option1', 'option2'])

import { z } from 'zod';

// String with constraints
const nameSchema = z.string()
    .min(3)
    .max(50)
    .describe("User's name")
    .openapi({ example: 'John Doe' });

// Number with range
const priceSchema = z.number()
    .min(0)
    .describe('Product price')
    .openapi({ example: 99.99 });

// Integer
const ageSchema = z.number()
    .int()
    .min(0)
    .max(120)
    .describe("User's age");

// Boolean with default
const isActiveSchema = z.boolean()
    .default(true)
    .describe('User active status');

// Date/time (ISO 8601)
const createdAtSchema = z.iso.datetime()
    .describe('Creation timestamp')
    .openapi({ example: '2024-01-20T10:30:00Z' });

// Date only (YYYY-MM-DD)
const birthDateSchema = z.iso.date()
    .describe('Birth date')
    .openapi({ example: '1990-05-15' });

// Email, UUID
const emailSchema = z.email().describe('Email address');
const userIdSchema = z.uuid().describe('User ID');

// Enumeration
const statusSchema = z.enum(['pending', 'processing', 'shipped', 'delivered'])
    .default('pending')
    .describe('Order status');

// Array
const tagsSchema = z.array(z.string()).openapi({
    description: 'Tags',
});

// Object
const addressSchema = z.object({
    street: z.string().describe('Street address'),
    city: z.string().describe('City'),
    zipCode: z.string().describe('Zip code'),
});

// Regex pattern
const phoneSchema = z.string()
    .regex(/^\+?[1-9]\d{1,14}$/, 'Invalid phone number format')
    .describe('Phone number');

// IP addresses
const ipv4Schema = z.ipv4();
const ipv6Schema = z.ipv6();
const ipSchema = z.union([z.ipv4(), z.ipv6()]);

// Hostname (regex pattern)
const hostnameSchema = z.string().regex(
    /^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9-]*[A-Za-z0-9])$/
);

class MyEndpoint extends OpenAPIRoute {
    async handle(c) {
        // CORRECT - with await and type annotation
        const data = await this.getValidatedData<typeof this.schema>();

        // Type-safe access
        const username = data.body.username;
        const page = data.query.page;
        const userId = data.params.userId;
        const apiKey = data.headers['X-API-Key'];

        return { success: true };
    }
}

class UpdateUser extends OpenAPIRoute {
    schema = {
        request: {
            body: contentJson(z.object({
                name: z.string().optional(),
                status: z.enum(['active', 'inactive']).default('active'),
            })),
        },
    };

    async handle() {
        const validated = await this.getValidatedData<typeof this.schema>();
        // validated.body.status is 'active' even if not sent

        const raw = await this.getUnvalidatedData();
        // raw.body = {} if nothing was sent

        // Check what was actually sent
        const updates: Record<string, any> = {};
        if ('name' in raw.body) updates.name = validated.body.name;
        if ('status' in raw.body) updates.status = validated.body.status;

        return { updated: updates };
    }
}

import { z } from 'zod';

// Define the model schema
const UserSchema = z.object({
    id: z.uuid(),
    username: z.string().min(3).max(20),
    email: z.email(),
    role: z.enum(['user', 'admin']),
    createdAt: z.iso.datetime(),
});

// Define the meta object
const userMeta = {
    model: {
        schema: UserSchema,              // Required: Zod schema for the model
        primaryKeys: ['id'],             // Required: Array of primary key fields
        tableName: 'users',              // Required for D1 endpoints
        serializer: (user: any) => {     // Optional: Transform output
            const { passwordHash, ...safe } = user;
            return safe;
        },
        serializerSchema: UserSchema.omit({ passwordHash: true }), // Optional: Schema for serialized output
    },
    pathParameters: ['id'],              // Optional: Explicit path params for nested routes
    tags: ['Users'],                     // Optional: OpenAPI tags for grouping operations
};

import { CreateEndpoint, type O } from 'chanfana';

class CreateUser extends CreateEndpoint {
    _meta = userMeta;

    // Optional: Pre-processing hook
    async before(data: O<typeof this._meta>): Promise<O<typeof this._meta>> {
        return {
            ...data,
            id: crypto.randomUUID(),
            createdAt: new Date().toISOString(),
        };
    }

    // Required: Create logic
    async create(data: O<typeof this._meta>) {
        await db.users.insert(data);
        return data;
    }

    // Optional: Post-processing hook
    async after(data: O<typeof this._meta>): Promise<O<typeof this._meta>> {
        await sendWelcomeEmail(data.email);
        return data;
    }
}

// Register route
openapi.post('/users', CreateUser);

import { ReadEndpoint, type Filters, type O } from 'chanfana';

class GetUser extends ReadEndpoint {
    _meta = userMeta;

    async before(filters: Filters): Promise<Filters> {
        // Pre-fetch validation
        return filters;
    }

    async fetch(filters: Filters): Promise<O<typeof this._meta> | null> {
        const userId = filters.filters[0].value;
        return await db.users.findById(userId);
    }

    async after(data: O<typeof this._meta>): Promise<O<typeof this._meta>> {
        // Post-fetch processing
        return data;
    }
}

// Register route with path parameter
openapi.get('/users/:id', GetUser);

import { ListEndpoint, type ListFilters, type ListResult, type O } from 'chanfana';

class ListUsers extends ListEndpoint {
    _meta = userMeta;

    // Configure filtering, search, and sorting
    filterFields = ['role', 'status'];           // Exact match filtering
    searchFields = ['username', 'email'];         // Full-text search (LIKE)
    orderByFields = ['createdAt', 'username'];    // Available sort fields
    defaultOrderBy = 'createdAt';                 // Default sort field

    async before(filters: ListFilters): Promise<ListFilters> {
        // Add tenant filter, etc.
        return filters;
    }

    async list(filters: ListFilters): Promise<ListResult<O<typeof this._meta>>> {
        const users = await db.users.findMany(filters);
        return { result: users };
    }

    async after(data: ListResult<O<typeof this._meta>>): Promise<ListResult<O<typeof this._meta>>> {
        return data;
    }
}

// Register route
openapi.get('/users', ListUsers);

// API calls:
// GET /users?page=2&per_page=10
// GET /users?role=admin
// GET /users?search=john
// GET /users?order_by=createdAt&order_by_direction=desc

import { UpdateEndpoint, type UpdateFilters, type O } from 'chanfana';

class UpdateUser extends UpdateEndpoint {
    _meta = userMeta;

    async before(oldObj: O<typeof this._meta>, filters: UpdateFilters): Promise<UpdateFilters> {
        filters.updatedData = {
            ...filters.updatedData,
            updatedAt: new Date().toISOString(),
        };
        return filters;
    }

    async getObject(filters: UpdateFilters): Promise<O<typeof this._meta> | null> {
        const userId = filters.filters[0].value;
        return await db.users.findById(userId);
    }

    async update(oldObj: O<typeof this._meta>, filters: UpdateFilters): Promise<O<typeof this._meta>> {
        const userId = filters.filters[0].value;
        return await db.users.update(userId, { ...oldObj, ...filters.updatedData });
    }

    async after(data: O<typeof this._meta>): Promise<O<typeof this._meta>> {
        await cache.invalidate(`user:${data.id}`);
        return data;
    }
}

// Register route
openapi.put('/users/:id', UpdateUser);

import { DeleteEndpoint, type Filters, type O } from 'chanfana';

class DeleteUser extends DeleteEndpoint {
    _meta = userMeta;

    async before(oldObj: O<typeof this._meta>, filters: Filters): Promise<Filters> {
        await checkDeletionPermissions(oldObj.id);
        return filters;
    }

    async getObject(filters: Filters): Promise<O<typeof this._meta> | null> {
        const userId = filters.filters[0].value;
        return await db.users.findById(userId);
    }

    async delete(oldObj: O<typeof this._meta>, filters: Filters): Promise<O<typeof this._meta> | null> {
        const userId = filters.filters[0].value;
        await db.users.delete(userId);
        return oldObj;
    }

    async after(data: O<typeof this._meta>): Promise<O<typeof this._meta>> {
        await auditLog.record('user_deleted', data.id);
        return data;
    }
}

// Register route
openapi.delete('/users/:id', DeleteUser);