import Fastify from 'fastify'
import prismaPlugin from './plugins/prisma'
import vodsRoutes from './plugins/vods'
import uploadsRoutes from './plugins/uploads'
import vtubersRoutes from './plugins/vtubers'
import usersRoutes from './plugins/users'
import indexRoutes from './plugins/index'
import streamsRoutes from './plugins/streams'
import adminRoutes from './plugins/admin'
import hls from './plugins/hls.ts'
import fastifyStatic from '@fastify/static'
import fastifySecureSession from '@fastify/secure-session'
import path, { basename } from 'node:path'
import fastifyFormbody from '@fastify/formbody'
import fastifyView from "@fastify/view"
import { env } from './config/env'
import { constants } from './config/constants'
import authRoutes from './plugins/auth'
import Handlebars from 'handlebars'
import graphileWorker from './plugins/graphileWorker'
import fastifySwagger from "@fastify/swagger"
import fastifySwaggerUi from "@fastify/swagger-ui"
import { join } from 'node:path'
import { format } from 'date-fns'
import * as jdenticon from 'jdenticon'
import { Role } from '../generated/prisma'
import fastifyFlash from '@fastify/flash'
import { isModerator, hasRole } from './utils/privs'
import { signUrl } from './utils/cdn'
import { extractBasePath } from './utils/filesystem'
import { truncate } from './utils/formatters.ts'
import { icons } from './utils/icons.ts'
import logger from './utils/logger.ts'
import fastifyCaching from '@fastify/caching'

export function buildApp() {
    const app = Fastify()

    Handlebars.registerHelper('formatDate', function (dateString) {
        if (!dateString) return ''
        return format(new Date(dateString), 'yyyy-MM-dd')
    })
    Handlebars.registerHelper('identicon', function (str, size = 48) {
        return jdenticon.toSvg(str, size)
    })
    Handlebars.registerHelper('safeJson', function (context) {
        return new Handlebars.SafeString(JSON.stringify(context));
    });
    Handlebars.registerHelper('json', function (context) {
        return JSON.stringify(context)
    })
    Handlebars.registerHelper('patron', function (user) {
        if (!user.roles) {
            throw new Error(
                'patron hbs helper was called without roles. This usually means you forgot to include roles relationship in the query.'
            );
        }
        return user.roles.some((r: Role) => r.name.startsWith('supporter'));
    });
    Handlebars.registerHelper('notEqual', function (a, b) {
        return a !== b;
    });
    Handlebars.registerHelper('isEqual', function (a, b) {
        logger.trace(`isEqual a=${a} b=${b}`)
        return a == b
    });
    Handlebars.registerHelper('isModerator', function (user) {
        return isModerator(user)
    })
    Handlebars.registerHelper('hasRole', hasRole)
    Handlebars.registerHelper('breaklines', function (text) {
        text = Handlebars.Utils.escapeExpression(text);
        text = text.replace(/(\r\n|\n|\r)/gm, '<br>');
        return new Handlebars.SafeString(text);
    });
    Handlebars.registerHelper('getCdnUrl', function (s3Key) {
        // Before you remove this log, find a way to memoize this function!
        logger.info(`getCdnUrl called with CDN_ORIGIN=${env.CDN_ORIGIN} and CDN_TOKEN_SECRET=${env.CDN_TOKEN_SECRET}`)
        return signUrl(`${env.CDN_ORIGIN}/${s3Key}`, {
            securityKey: env.CDN_TOKEN_SECRET,
            expirationTime: constants.timeUnits.sevenDaysInSeconds,
        })
    })
    /**
     * @see https://github.com/video-dev/hls.js/issues/2152
     */
    Handlebars.registerHelper('signedHlsUrl', function (s3Key) {
        if (!s3Key) throw new Error(`signedHlsUrl called with falsy s3Key=${s3Key}`);
        const pathAllowed = extractBasePath(s3Key)
        const url = signUrl(`${env.CDN_ORIGIN}/${s3Key}`, {
            securityKey: env.CDN_TOKEN_SECRET,
            pathAllowed,
            isDirectory: true,
            expirationTime: constants.timeUnits.sevenDaysInSeconds,
        })
        logger.debug(`pathAllowed=${pathAllowed} url=${url}`)
        return url
    })
    Handlebars.registerHelper('basename', function (url: string) {
        return basename(url)
    })
    Handlebars.registerHelper('trunc', function (str, length = 6) {
        return truncate(str, length)
    });
    Handlebars.registerHelper('icon', function (name: string, size = 20) {
        const svg = icons[name];

        if (!svg) {
            return new Handlebars.SafeString(`<!-- icon "${name}" not found -->`);
        }

        // Inject width/height if not already set
        const sizedSvg = svg
            .replace(/<svg([^>]*)>/, `<svg$1 width="${size}" height="${size}">`);

        return new Handlebars.SafeString(sizedSvg);
    });

    const __dirname = import.meta.dirname;
    const swaggerOptions = {
        swagger: {
            info: {
                title: constants.site.title,
                description: constants.site.description,
                version: constants.site.version,
            },
            host: env.ORIGIN,
            schemes: ["http", "https"],
            consumes: ["application/json"],
            produces: ["application/json"],
        },
    };

    const swaggerUiOptions = {
        routePrefix: "/api/docs",
        exposeRoute: true,
    };

    app.register(fastifySwagger, swaggerOptions);
    app.register(fastifySwaggerUi, swaggerUiOptions);

    app.register(fastifyStatic, {
        root: path.join(__dirname, 'assets'),
        prefix: '/', // optional: default '/'
        constraints: {} // optional: default {}
    })
    app.register(fastifyFormbody)
    // app.register(fastifyMultipart, {
    //     limits: {
    //         fileSize: 30 * 1024 * 1024 // 30MB
    //     }
    // })
    app.register(fastifySecureSession, {
        // the name of the attribute decorated on the request-object, defaults to 'session'
        sessionName: 'session',
        cookieName: 'fp-session',
        // adapt this to point to the directory where secret-key is located
        key: Buffer.from(env.COOKIE_SECRET, 'hex'),
        // the amount of time the session is considered valid; this is different from the cookie options
        // and based on value within the session.
        expiry: 24 * 60 * 60, // Default 1 day
        cookie: {
            path: '/'
            // options for setCookie, see https://github.com/fastify/fastify-cookie
        }
    })
    app.register(fastifyFlash)
    app.register(fastifyView, {
        engine: {
            handlebars: Handlebars,
        },
        templates: join(__dirname, '..', 'src', 'views'),
        viewExt: 'hbs',
        options: {
            partials: {
                navbar: 'partials/navbar.hbs',
                footer: 'partials/footer.hbs',
                commentForm: 'partials/commentForm.hbs'
            }
        }
    })

    // @todo we are going to need to use redis or similar https://github.com/fastify/fastify-caching
    // app.register(fastifyCaching, {
    //     expiresIn: 300,
    //     privacy: 'private',
    //     serverExpiresIn: 300,
    // })

    app.register(graphileWorker)
    app.register(prismaPlugin)
    app.register(hls)
    app.register(vodsRoutes)

    app.register(streamsRoutes)
    app.register(vtubersRoutes)
    app.register(uploadsRoutes)
    app.register(usersRoutes)
    app.register(indexRoutes)
    app.register(adminRoutes)
    app.register(authRoutes)

    return app
}