import { InternshipReportAction, InternshipReportActions } from "@/state/actions";
import { Serializable } from "@/serialization/types";
import {
    createSubmissionReducer,
    defaultDeanApprovalsState,
    defaultSubmissionState,
    SubmissionState
} from "@/state/reducer/submission";
import { Reducer } from "react";
import { SubmissionAction } from "@/state/actions/submission";
import { InternshipDocument, SubmissionState as ApiSubmissionState } from "@/api/dto/internship-registration";
import { Report } from "@/data/report";
import { reportSerializationTransformer } from "@/serialization/report";

export type InternshipReportState = SubmissionState & {
    report: Serializable<Report> | null;
    evaluation: InternshipDocument | null;
}

const defaultInternshipReportState: InternshipReportState = {
    ...defaultDeanApprovalsState,
    ...defaultSubmissionState,
    report: null,
    evaluation: null,
}

export const getInternshipReport = ({ report }: InternshipReportState): Report | null =>
    report && reportSerializationTransformer.reverseTransform(report);

const internshipReportSubmissionReducer: Reducer<InternshipReportState, InternshipReportAction> = createSubmissionReducer({
    [InternshipReportActions.Approve]: SubmissionAction.Approve,
    [InternshipReportActions.Decline]: SubmissionAction.Decline,
    [InternshipReportActions.Receive]: SubmissionAction.Receive,
    [InternshipReportActions.Save]: SubmissionAction.Save,
    [InternshipReportActions.Send]: SubmissionAction.Send,
})

const internshipReportReducer = (state: InternshipReportState = defaultInternshipReportState, action: InternshipReportAction): InternshipReportState => {
    state = internshipReportSubmissionReducer(state, action);

    switch (action.type) {
        case InternshipReportActions.Reset:
            return defaultInternshipReportState;
        case InternshipReportActions.Save:
        case InternshipReportActions.Send:
            return {
                ...state,
            }
        case InternshipReportActions.Receive:
            if (state.overwritten) {
                return state;
            }

            return {
                ...state,
                accepted: action.state === ApiSubmissionState.Accepted,
                declined: action.state === ApiSubmissionState.Rejected,
                sent: [
                    ApiSubmissionState.Accepted,
                    ApiSubmissionState.Rejected,
                    ApiSubmissionState.Submitted
                ].includes(action.state),
                report: reportSerializationTransformer.transform(action.report),
                comment: action.comment,
                evaluation: action.evaluation,
            }
        default:
            return state;
    }
}

export default internshipReportReducer;