const PortainerClient = require('portainer-api-client')
const fs = require('fs')
const figlet = require('figlet')

const TYPES = {
    swarm: 1,
    compose: 2
}

const createClient = (config) => {
    config = Object.assign({
        url: null,
        username: null,
        password: null
    }, config)
    const log = config.log || console.log

    const warning = `# ${figlet.textSync('WARNING!', 'Colossal').split('\n').join('\n# ')}\n# This stack was deployed automatically. Any changes made here may be overwritten.\n#\n\n`

    const client = new PortainerClient(config.url, config.username, config.password);

    const call = async (method, path, data) => {
        if (config.verbose) log(method, path, data ? JSON.stringify(data, null, 4) : '')
        const result = await client.callApiWithKey(method, path, data)
        if (config.verbose) log(JSON.stringify(result, null, 4))
        return result
    }

    const getEndpointSwarm = async (endpointId) => await call('get', `/api/endpoints/${encodeURIComponent(endpointId)}/docker/swarm`)
    const getEndpoints = async () => await call('get', '/api/endpoints')
    const getSwarms = async () => await call('get', '/api/swarms')
    const getStacks = async () => await call('get', '/api/stacks')
    const deleteStack = async (opts) => {
        opts = Object.assign({
            name: null,
            id: null,
            endpointId: null
        }, opts)
        if (!opts.id) {
            if (!opts.name) {
                throw new Error('Either name or id required')
            }
            const stacks = await getStacks()
            const stack = stacks.find(x => x.Name === opts.name)
            if (!stack) throw new Error(`Stack ${opts.name} not found.`)
            opts.id = stack.Id
        }
        if (!opts.endpointId) {
            const endpoints = await getEndpoints()
            if (!endpoints || !endpoints.length) throw new Error('Could not find any endpoints')
            opts.endpointId = endpoints[0].Id
        }
        console.log(`Deleting stack ${opts.id}`)
        return call('delete', `/api/stacks/${encodeURIComponent(opts.id)}`)
    }
    const upsertStack = async (opts) => {
        opts = Object.assign({
            name: null,
            stackFile: null,
            stackFileContent: null,
            swarmId: null,
            endpointId: null,
            type: 'swarm',
            method: 'string',
            prune: true,
            warning: true
        }, opts)
        if (!opts.name) throw new Error('name required')
        if (!opts.stackFileContent) {
            if (!opts.stackFile) {
                throw new Error('stackFile or stackFileContent required')
            }
            opts.stackFileContent = fs.readFileSync(opts.stackFile, 'utf-8')
        }
        const type = TYPES[opts.type] || opts.type
        if (!opts.endpointId) {
            const endpoints = await getEndpoints()
            if (!endpoints || !endpoints.length) throw new Error('Could not find any endpoints')
            opts.endpointId = endpoints[0].Id
        }
        if (!opts.swarmId) {
            const swarm = await getEndpointSwarm(opts.endpointId)
            opts.swarmId = swarm.ID
        }
        const stacks = await getStacks()
        const stack = stacks.find(x => x.Name === opts.name)
        if (stack) {
            log(`Found existing stack ${opts.name}. Updating...`)
            return await call('PUT', `/api/stacks/${encodeURIComponent(stack.Id)}?method=${encodeURIComponent(opts.method)}&type=${encodeURIComponent(type)}&endpointId=${encodeURIComponent(opts.endpointId)}`, {
                Name: opts.name,
                StackFileContent: (opts.warning ? warning : '') + opts.stackFileContent,
                SwarmID: opts.swarmId,
                Prune: opts.prune
            })
        } else {
            log(`New stack ${opts.name}`)
            const stack = await call('POST', `/api/stacks?method=${encodeURIComponent(opts.method)}&type=${encodeURIComponent(type)}&endpointId=${encodeURIComponent(opts.endpointId)}`, {
                Name: opts.name,
                StackFileContent: (opts.warning ? warning : '') + opts.stackFileContent,
                SwarmID: opts.swarmId
            })
            await call('POST', '/api/resource_controls', {
                Type: 'stack',
                Public: true,
                ResourceID: opts.name,
                Users: [],
                Teams: [],
                SubResourceIDs: []
            })
            return stack
        }
    }
    return { getEndpoints, getSwarms, getStacks, upsertStack, deleteStack }
}

module.exports = { createClient }