import {
    TemplateStoreManager,
    AgreementStoreManager,
    ConditionStoreManager
} from '../managers'
import DIDRegistry from '../DIDRegistry'
import { LockRewardCondition } from '../conditions/LockRewardCondition'
import { AccessSecretStoreCondition } from '../conditions/AccessSecretStoreCondition'
import { EscrowReward } from '../conditions/EscrowReward'
import { DDO } from '../../../ddo/DDO'
import { generateId, LoggerInstance, Logger, zeroX } from '../../../utils'

import {
    ComputeExecutionCondition,
    Condition,
    ConditionState,
    conditionStateNames
} from '../conditions'
import { ServiceType } from '../../../ddo/Service'

export interface Conditions {
    lockRewardCondition: LockRewardCondition
    accessSecretStoreCondition?: AccessSecretStoreCondition
    computeExecutionCondition?: ComputeExecutionCondition
    escrowReward: EscrowReward
}

export interface AgreementConditionsStatus {
    [condition: string]: {
        condition: string
        contractName: string
        state: ConditionState
        blocked: boolean
        blockedBy: string[]
    }
}

export class AgreementTemplateBase {
    public templateName: string

    public templateManager: TemplateStoreManager

    public agreementStoreManager: AgreementStoreManager

    public didRegistry: DIDRegistry

    public conditions: Conditions

    private logger: Logger

    public constructor(
        templateManager: TemplateStoreManager,
        agreementStoreManager: AgreementStoreManager,
        didRegistry: DIDRegistry,
        conditions: Conditions
    ) {
        this.templateManager = templateManager
        this.agreementStoreManager = agreementStoreManager
        this.didRegistry = didRegistry
        this.conditions = conditions

        this.logger = LoggerInstance
        this.templateName = 'invalid'
    }

    public async createAgreementFromDDO(
        agreementId: string,
        ddo: DDO,
        serviceType: ServiceType,
        consumer: string,
        provider: string,
        from?: string
    ) {
        return !!(await this.createFullAgreement(
            ddo.shortId(),
            ddo.findServiceByType(serviceType).attributes.main.price,
            consumer,
            provider,
            from,
            agreementId
        ))
    }

    public async getConditionIdsFromDDO(
        agreementId: string,
        ddo: DDO,
        consumer: string,
        from?: string
    ) {
        return this.createFullAgreementData(
            agreementId,
            ddo.shortId(),
            ddo.findServiceByType('metadata').attributes.main.price,
            consumer
        )
    }

    public getName() {
        return this.templateName
    }

    public getId() {
        return this.templateManager.generateId(this.getName())
    }

    /**
     * Create a agreement using EscrowAccessSecretStoreTemplate using only the most important information.
     * @param  {string}          did    Asset DID.
     * @param  {number}          amount Asset price.
     * @param  {string}          consumer ethereum address of consumer.
     * @param  {string}          provider ethereum address of service provider (brizo address)
     * @param  {string}          from   Consumer address.
     * @param  {string}          agreementId bytes32 agreement id.
     *
     * @return {Promise<string>}        Agreement ID.
     */
    public async createFullAgreement(
        did: string,
        amount: number | string,
        consumer: string,
        provider: string,
        from?: string,
        agreementId: string = generateId()
    ): Promise<string> {
        const conditionIds = await this.createFullAgreementData(
            agreementId,
            did,
            amount,
            consumer
        )

        const timeouts = [0, 0, 0]
        const timelocks = [0, 0, 0]
        await this.agreementStoreManager.createAgreement(
            agreementId,
            did,
            this.getId(),
            conditionIds,
            timelocks,
            timeouts,
            [consumer, provider],
            from
        )
        return zeroX(agreementId)
    }

    protected async createFullAgreementData(
        agreementId: string,
        did: string,
        amount: number | string,
        consumer: string
    ): Promise<string[]> {
        return null
    }

    /**
     * Conditions address list.
     * @return {Promise<string[]>} Conditions address.
     */
    public async getConditionTypes(): Promise<string[]> {
        return this.templateManager.getConditionTypes(this.getId())
    }

    /**
     * List of condition contracts.
     * @return {Promise<Condition[]>} Conditions contracts.
     */
    public async getConditions(): Promise<Condition[]> {
        return this.templateManager.getConditions(await this.getConditionTypes())
    }

    public async getServiceAgreementTemplate() {
        return null
    }

    public async getServiceAgreementTemplateConditions() {
        const serviceAgreementTemplate = await this.getServiceAgreementTemplate()
        return serviceAgreementTemplate.conditions
    }

    public async getServiceAgreementTemplateConditionByRef(ref: string) {
        const name = (await this.getServiceAgreementTemplateConditions()).find(
            ({ name: conditionRef }) => conditionRef === ref
        ).contractName
        return (await this.getConditions()).find(
            (condition) => condition.contractName === name
        )
    }

    public async getServiceAgreementTemplateDependencies() {
        const serviceAgreementTemplate = await this.getServiceAgreementTemplate()
        return serviceAgreementTemplate.conditionDependency
    }

    /**
     * Returns the status of the conditions.
     * @param  {string}  agreementId Agreement ID.
     * @param  {ConditionStoreManager} conditionStoreManager
     * @return {Promise}             Conditions status.
     */
    public async getAgreementStatus(
        agreementId: string,
        conditionStoreManager: ConditionStoreManager
    ): Promise<AgreementConditionsStatus | false> {
        const dependencies = await this.getServiceAgreementTemplateDependencies()
        const { conditionIds } = await this.agreementStoreManager.getAgreement(
            agreementId
        )
        if (!conditionIds.length) {
            // this.logger.error(`Agreement not creeated yet: "${agreementId}"`)
            return false
        }

        const conditionIdByCondition = (await this.getConditions()).reduce(
            (acc, { contractName }, i) => ({
                ...acc,
                [contractName]: conditionIds[i]
            }),
            {}
        )

        const statesPromises = Object.keys(dependencies).map(async (ref, i) => {
            const { contractName } = await this.getServiceAgreementTemplateConditionByRef(
                ref
            )
            return {
                ref,
                contractName,
                state: (
                    await conditionStoreManager.getCondition(
                        conditionIdByCondition[contractName]
                    )
                ).state
            }
        })
        const states = await Promise.all(statesPromises)

        return states.reduce((acc, { contractName, ref, state }) => {
            const blockers = dependencies[ref]
                .map((dependency) => states.find((_) => _.ref === dependency))
                .filter((condition) => condition.state !== ConditionState.Fulfilled)
            return {
                ...acc,
                [ref]: {
                    condition: ref,
                    contractName,
                    state,
                    blocked: !!blockers.length,
                    blockedBy: blockers.map((_) => _.ref)
                }
            }
        }, {})
    }

    /**
     * Prints the agreement status.
     * @param {string} agreementId Agreement ID.
     * @param {ConditionStoreManager} conditionStoreManager
     */
    public async printAgreementStatus(
        agreementId: string,
        conditionStoreManager: ConditionStoreManager
    ) {
        const status = await this.getAgreementStatus(agreementId, conditionStoreManager)

        this.logger.bypass('-'.repeat(80))
        this.logger.bypass('Template:', this.templateName)
        this.logger.bypass('Agreement ID:', agreementId)
        this.logger.bypass('-'.repeat(40))
        if (!status) {
            this.logger.bypass('Agreement not created yet!')
        }
        Object.values(status || []).forEach(
            ({ condition, contractName, state, blocked, blockedBy }, i) => {
                if (i) {
                    this.logger.bypass('-'.repeat(20))
                }
                this.logger.bypass(`${condition} (${contractName})`)
                this.logger.bypass('  Status:', state, `(${conditionStateNames[state]})`)
                if (blocked) {
                    this.logger.bypass('  Blocked by:', blockedBy)
                }
            }
        )
        this.logger.bypass('-'.repeat(80))
    }

    /**
     * Generates and returns the agreement creation event.
     * @param  {string} agreementId Agreement ID.
     * @return {Event}              Agreement created event.
     */
    public getAgreementCreatedEvent(agreementId: string) {
        return this.agreementStoreManager.getAgreementCreatedEvent(agreementId)
    }

    /**
     * Return actor type ids for this template (specified by subclass)
     *
     */
    public async getActorTypeIds() {
        const { actorTypeIds } = await this.templateManager.getTemplate(this.getId())
        return actorTypeIds
    }

    /**
     * Return actor types (strings) for this template (specified by subclass)
     *
     */
    public async getActorTypes() {
        const actorTypeIds = await this.getActorTypeIds()
        return actorTypeIds.map((typeId) =>
            this.templateManager.getActorTypeValue(typeId)
        )
    }
}