import BN from 'bn.js';
import { ElectionStage, Seat } from '@joystream/types/council';
import { Option, Text } from '@polkadot/types';
import { Constructor } from '@polkadot/types/types';
import { Struct, Vec } from '@polkadot/types/codec';
import { u32 } from '@polkadot/types/primitive';
import { BlockNumber, Balance, AccountId } from '@polkadot/types/interfaces';
import { DerivedBalances } from '@polkadot/api-derive/types';
import { KeyringPair } from '@polkadot/keyring/types';
import { WorkerId } from '@joystream/types/working-group';
import { Profile, MemberId } from '@joystream/types/members';
import {
    GenericJoyStreamRoleSchema,
    JobSpecifics,
    ApplicationDetails,
    QuestionSections,
    QuestionSection,
    QuestionsFields,
    QuestionField,
    EntryInMembershipModuke,
    HiringProcess,
    AdditionalRolehiringProcessDetails,
    CreatorDetails
} from '@joystream/types/hiring/schemas/role.schema.typings';
import ajv from 'ajv';
import { Opening, StakingPolicy, ApplicationStageKeys } from '@joystream/types/hiring';

// KeyringPair type extended with mandatory "meta.name"
// It's used for accounts/keys management within CLI.
// If not provided in the account json file, the meta.name value is set to "Unnamed Account"
export type NamedKeyringPair = KeyringPair & {
    meta: {
        name: string
    }
}

// Summary of the account information fetched from the api for "account:current" purposes (currently just balances)
export type AccountSummary = {
    balances: DerivedBalances
}

// Object/Tuple containing council/councilElection information (council:info).
// The tuple is useful, because that's how api.queryMulti returns the results.
export type CouncilInfoTuple = Parameters<typeof createCouncilInfoObj>;
export type CouncilInfoObj = ReturnType<typeof createCouncilInfoObj>;
// This function allows us to easily transform the tuple into the object
// and simplifies the creation of consitent Object and Tuple types (seen above).
export function createCouncilInfoObj(
    activeCouncil: Seat[],
    termEndsAt: BlockNumber,
    autoStart: Boolean,
    newTermDuration: BN,
    candidacyLimit: BN,
    councilSize: BN,
    minCouncilStake: Balance,
    minVotingStake: Balance,
    announcingPeriod: BlockNumber,
    votingPeriod: BlockNumber,
    revealingPeriod: BlockNumber,
    round: BN,
    stage: Option<ElectionStage>
) {
    return {
        activeCouncil,
        termEndsAt,
        autoStart,
        newTermDuration,
        candidacyLimit,
        councilSize,
        minCouncilStake,
        minVotingStake,
        announcingPeriod,
        votingPeriod,
        revealingPeriod,
        round,
        stage
    };
}

// Object with "name" and "value" properties, used for rendering simple CLI tables like:
// Total balance:   100 JOY
// Free calance:     50 JOY
export type NameValueObj = { name: string, value: string };

// Working groups related types
export enum WorkingGroups {
    StorageProviders = 'storageProviders'
}

// In contrast to Pioneer, currently only StorageProviders group is available in CLI
export const AvailableGroups: readonly WorkingGroups[] = [
  WorkingGroups.StorageProviders
] as const;

// Compound working group types
export type GroupMember = {
    workerId: WorkerId;
    memberId: MemberId;
    roleAccount: AccountId;
    profile: Profile;
    stake: Balance;
    earned: Balance;
}

export type GroupApplication = {
    wgApplicationId: number;
    applicationId: number;
    member: Profile | null;
    roleAccout: AccountId;
    stakes: {
        application: number;
        role: number;
    },
    humanReadableText: string;
    stage: ApplicationStageKeys;
}

export enum OpeningStatus {
    WaitingToBegin = 'WaitingToBegin',
    AcceptingApplications = 'AcceptingApplications',
    InReview = 'InReview',
    Complete = 'Complete',
    Cancelled = 'Cancelled',
    Unknown = 'Unknown'
}

export type GroupOpeningStage = {
    status: OpeningStatus;
    block?: number;
    date?: Date;
}

export type GroupOpeningStakes = {
    application?: StakingPolicy;
    role?: StakingPolicy;
}

export type GroupOpening = {
    wgOpeningId: number;
    openingId: number;
    stage: GroupOpeningStage;
    opening: Opening;
    stakes: GroupOpeningStakes;
    applications: GroupApplication[];
}

// Some helper structs for generating human_readable_text in working group opening extrinsic
// Note those types are not part of the runtime etc., we just use them to simplify prompting for values
// (since there exists functionality that handles that for substrate types like: Struct, Vec etc.)
interface WithJSONable<T> {
    toJSON: () => T;
}
export class HRTJobSpecificsStruct extends Struct implements WithJSONable<JobSpecifics> {
    constructor (value?: JobSpecifics) {
        super({
          title: "Text",
          description: "Text",
        }, value);
    }
    get title(): string {
        return (this.get('title') as Text).toString();
    }
    get description(): string {
        return (this.get('description') as Text).toString();
    }
    toJSON(): JobSpecifics {
        const { title, description } = this;
        return { title, description };
    }
}
export class HRTEntryInMembershipModukeStruct extends Struct implements WithJSONable<EntryInMembershipModuke> {
    constructor (value?: EntryInMembershipModuke) {
        super({
          handle: "Text",
        }, value);
    }
    get handle(): string {
        return (this.get('handle') as Text).toString();
    }
    toJSON(): EntryInMembershipModuke {
        const { handle } = this;
        return { handle };
    }
}
export class HRTCreatorDetailsStruct extends Struct implements WithJSONable<CreatorDetails> {
    constructor (value?: CreatorDetails) {
        super({
          membership: HRTEntryInMembershipModukeStruct,
        }, value);
    }
    get membership(): EntryInMembershipModuke {
        return (this.get('membership') as HRTEntryInMembershipModukeStruct).toJSON();
    }
    toJSON(): CreatorDetails {
        const { membership } = this;
        return { membership };
    }
}
export class HRTHiringProcessStruct extends Struct implements WithJSONable<HiringProcess> {
    constructor (value?: HiringProcess) {
        super({
          details: "Vec<Text>",
        }, value);
    }
    get details(): AdditionalRolehiringProcessDetails {
        return (this.get('details') as Vec<Text>).toArray().map(v => v.toString());
    }
    toJSON(): HiringProcess {
        const { details } = this;
        return { details };
    }
}
export class HRTQuestionFieldStruct extends Struct implements WithJSONable<QuestionField> {
    constructor (value?: QuestionField) {
        super({
            title: "Text",
            type: "Text"
        }, value);
    }
    get title(): string {
        return (this.get('title') as Text).toString();
    }
    get type(): string {
        return (this.get('type') as Text).toString();
    }
    toJSON(): QuestionField {
        const { title, type } = this;
        return { title, type };
    }
}
class HRTQuestionsFieldsVec extends Vec.with(HRTQuestionFieldStruct) implements WithJSONable<QuestionsFields> {
    toJSON(): QuestionsFields {
        return this.toArray().map(v => v.toJSON());
    }
}
export class HRTQuestionSectionStruct extends Struct implements WithJSONable<QuestionSection> {
    constructor (value?: QuestionSection) {
        super({
            title: "Text",
            questions: HRTQuestionsFieldsVec
        }, value);
    }
    get title(): string {
        return (this.get('title') as Text).toString();
    }
    get questions(): QuestionsFields {
        return (this.get('questions') as HRTQuestionsFieldsVec).toJSON();
    }
    toJSON(): QuestionSection {
        const { title, questions } = this;
        return { title, questions };
    }
}
export class HRTQuestionSectionsVec extends Vec.with(HRTQuestionSectionStruct) implements WithJSONable<QuestionSections> {
    toJSON(): QuestionSections {
        return this.toArray().map(v => v.toJSON());
    }
};
export class HRTApplicationDetailsStruct extends Struct implements WithJSONable<ApplicationDetails> {
    constructor (value?: ApplicationDetails) {
        super({
            sections: HRTQuestionSectionsVec
        }, value);
    }
    get sections(): QuestionSections {
        return (this.get('sections') as HRTQuestionSectionsVec).toJSON();
    }
    toJSON(): ApplicationDetails {
        const { sections } = this;
        return { sections };
    }
}
export class HRTStruct extends Struct implements WithJSONable<GenericJoyStreamRoleSchema> {
    constructor (value?: GenericJoyStreamRoleSchema) {
        super({
            version: "u32",
            headline: "Text",
            job: HRTJobSpecificsStruct,
            application: HRTApplicationDetailsStruct,
            reward: "Text",
            creator: HRTCreatorDetailsStruct,
            process: HRTHiringProcessStruct
        }, value);
    }
    get version(): number {
        return (this.get('version') as u32).toNumber();
    }
    get headline(): string {
        return (this.get('headline') as Text).toString();
    }
    get job(): JobSpecifics {
        return (this.get('job') as HRTJobSpecificsStruct).toJSON();
    }
    get application(): ApplicationDetails {
        return (this.get('application') as HRTApplicationDetailsStruct).toJSON();
    }
    get reward(): string {
        return (this.get('reward') as Text).toString();
    }
    get creator(): CreatorDetails {
        return (this.get('creator') as HRTCreatorDetailsStruct).toJSON();
    }
    get process(): HiringProcess {
        return (this.get('process') as HRTHiringProcessStruct).toJSON();
    }
    toJSON(): GenericJoyStreamRoleSchema {
        const { version, headline, job, application, reward, creator, process } = this;
        return { version, headline, job, application, reward, creator, process };
    }
};

// A mapping of argName to json struct and schemaValidator
// It is used to map arguments of type "Bytes" that are in fact a json string
// (and can be validated against a schema)
export type JSONArgsMapping = { [argName: string]: {
    struct: Constructor<Struct>,
    schemaValidator: ajv.ValidateFunction
} };