import { createSlice, createAsyncThunk, PayloadAction } from '@reduxjs/toolkit';
import axios from '../../axios';

// =====================
// Типы
// =====================

type Status = 'idle' | 'loading' | 'successful' | 'failed';

// Основной профиль
export interface ProfileIdentity {
    userId: number;
    username: string;
    email: string;
    createdAt: string;
}

export interface ProfileSolutions {
    totalSolved: number;
    solvedLast7Days: number;
}

export interface ProfileContestsInfo {
    totalParticipations: number;
    participationsLast7Days: number;
}

export interface ProfileCreationStats {
    missions: { total: number; last7Days: number };
    contests: { total: number; last7Days: number };
    articles: { total: number; last7Days: number };
}

export interface ProfileResponse {
    identity: ProfileIdentity;
    solutions: ProfileSolutions;
    contests: ProfileContestsInfo;
    creation: ProfileCreationStats;
}

// Missions
export interface MissionsBucket {
    key: string;
    label: string;
    solved: number;
    total: number;
}

export interface MissionItem {
    missionId: number;
    missionName: string;
    difficultyLabel: string;
    difficultyValue: number;
    createdAt: string;
    timeLimitMilliseconds: number;
    memoryLimitBytes: number;
}

export interface MissionsResponse {
    summary: {
        total: MissionsBucket;
        buckets: MissionsBucket[];
    };
    recent: {
        items: MissionItem[];
        page: number;
        pageSize: number;
        hasNextPage: boolean;
    };
    authored: {
        items: MissionItem[];
        page: number;
        pageSize: number;
        hasNextPage: boolean;
    };
}

// Articles
export interface ProfileArticleItem {
    articleId: number;
    title: string;
    createdAt: string;
    updatedAt: string;
}
export interface ProfileArticlesResponse {
    articles: {
        items: ProfileArticleItem[];
        page: number;
        pageSize: number;
        hasNextPage: boolean;
    };
}

// Contests
export interface ContestItem {
    contestId: number;
    name: string;
    scheduleType: 'AlwaysOpen' | 'FixedWindow' | 'RollingWindow';
    visibility: string;
    startsAt: string;
    endsAt: string;
    attemptDurationMinutes: number;
    role: 'None' | 'Participant' | 'Organizer';
}

export interface ContestsList {
    items: ContestItem[];
    page: number;
    pageSize: number;
    hasNextPage: boolean;
}

export interface ProfileContestsResponse {
    upcoming: ContestsList;
    past: ContestsList;
    mine: ContestsList;
}

// =====================
// Состояние
// =====================

interface ProfileState {
    profile: {
        data?: ProfileResponse;
        status: Status;
        error?: string;
    };

    missions: {
        data?: MissionsResponse;
        status: Status;
        error?: string;
    };

    articles: {
        data?: ProfileArticlesResponse;
        status: Status;
        error?: string;
    };

    contests: {
        data?: ProfileContestsResponse;
        status: Status;
        error?: string;
    };
}

const initialState: ProfileState = {
    profile: {
        data: undefined,
        status: 'idle',
        error: undefined,
    },
    missions: {
        data: undefined,
        status: 'idle',
        error: undefined,
    },
    articles: {
        data: undefined,
        status: 'idle',
        error: undefined,
    },
    contests: {
        data: undefined,
        status: 'idle',
        error: undefined,
    },
};

// =====================
// Async Thunks
// =====================

// Основной профиль
export const fetchProfile = createAsyncThunk(
    'profile/fetch',
    async (username: string, { rejectWithValue }) => {
        try {
            const res = await axios.get<ProfileResponse>(
                `/profile/${username}`,
            );
            return res.data;
        } catch (err: any) {
            return rejectWithValue(
                err.response?.data?.message || 'Ошибка загрузки профиля',
            );
        }
    },
);

// Missions
export const fetchProfileMissions = createAsyncThunk(
    'profile/fetchMissions',
    async (
        {
            username,
            recentPage = 0,
            recentPageSize = 100,
            authoredPage = 0,
            authoredPageSize = 100,
        }: {
            username: string;
            recentPage?: number;
            recentPageSize?: number;
            authoredPage?: number;
            authoredPageSize?: number;
        },
        { rejectWithValue },
    ) => {
        try {
            const res = await axios.get<MissionsResponse>(
                `/profile/${username}/missions`,
                {
                    params: {
                        recentPage,
                        recentPageSize,
                        authoredPage,
                        authoredPageSize,
                    },
                },
            );
            return res.data;
        } catch (err: any) {
            return rejectWithValue(
                err.response?.data?.message || 'Ошибка загрузки задач',
            );
        }
    },
);

// Articles
export const fetchProfileArticles = createAsyncThunk(
    'profile/fetchArticles',
    async (
        {
            username,
            page = 0,
            pageSize = 100,
        }: { username: string; page?: number; pageSize?: number },
        { rejectWithValue },
    ) => {
        try {
            const res = await axios.get<ProfileArticlesResponse>(
                `/profile/${username}/articles`,
                { params: { page, pageSize } },
            );
            return res.data;
        } catch (err: any) {
            return rejectWithValue(
                err.response?.data?.message || 'Ошибка загрузки статей',
            );
        }
    },
);

// Contests
export const fetchProfileContests = createAsyncThunk(
    'profile/fetchContests',
    async (
        {
            username,
            upcomingPage = 0,
            upcomingPageSize = 100,
            pastPage = 0,
            pastPageSize = 100,
            minePage = 0,
            minePageSize = 100,
        }: {
            username: string;
            upcomingPage?: number;
            upcomingPageSize?: number;
            pastPage?: number;
            pastPageSize?: number;
            minePage?: number;
            minePageSize?: number;
        },
        { rejectWithValue },
    ) => {
        try {
            const res = await axios.get<ProfileContestsResponse>(
                `/profile/${username}/contests`,
                {
                    params: {
                        upcomingPage,
                        upcomingPageSize,
                        pastPage,
                        pastPageSize,
                        minePage,
                        minePageSize,
                    },
                },
            );
            return res.data;
        } catch (err: any) {
            return rejectWithValue(
                err.response?.data?.message || 'Ошибка загрузки контестов',
            );
        }
    },
);

// =====================
// Slice
// =====================

const profileSlice = createSlice({
    name: 'profile',
    initialState,
    reducers: {
        setProfileStatus: (
            state,
            action: PayloadAction<{
                key: keyof ProfileState;
                status: Status;
            }>,
        ) => {
            state[action.payload.key].status = action.payload.status;
        },
    },

    extraReducers: (builder) => {
        // PROFILE
        builder.addCase(fetchProfile.pending, (state) => {
            state.profile.status = 'loading';
            state.profile.error = undefined;
        });
        builder.addCase(
            fetchProfile.fulfilled,
            (state, action: PayloadAction<ProfileResponse>) => {
                state.profile.status = 'successful';
                state.profile.data = action.payload;
            },
        );
        builder.addCase(fetchProfile.rejected, (state, action: any) => {
            state.profile.status = 'failed';
            state.profile.error = action.payload;
        });

        // MISSIONS
        builder.addCase(fetchProfileMissions.pending, (state) => {
            state.missions.status = 'loading';
            state.missions.error = undefined;
        });
        builder.addCase(
            fetchProfileMissions.fulfilled,
            (state, action: PayloadAction<MissionsResponse>) => {
                state.missions.status = 'successful';
                state.missions.data = action.payload;
            },
        );
        builder.addCase(fetchProfileMissions.rejected, (state, action: any) => {
            state.missions.status = 'failed';
            state.missions.error = action.payload;
        });

        // ARTICLES
        builder.addCase(fetchProfileArticles.pending, (state) => {
            state.articles.status = 'loading';
            state.articles.error = undefined;
        });
        builder.addCase(
            fetchProfileArticles.fulfilled,
            (state, action: PayloadAction<ProfileArticlesResponse>) => {
                state.articles.status = 'successful';
                state.articles.data = action.payload;
            },
        );
        builder.addCase(fetchProfileArticles.rejected, (state, action: any) => {
            state.articles.status = 'failed';
            state.articles.error = action.payload;
        });

        // CONTESTS
        builder.addCase(fetchProfileContests.pending, (state) => {
            state.contests.status = 'loading';
            state.contests.error = undefined;
        });
        builder.addCase(
            fetchProfileContests.fulfilled,
            (state, action: PayloadAction<ProfileContestsResponse>) => {
                state.contests.status = 'successful';
                state.contests.data = action.payload;
            },
        );
        builder.addCase(fetchProfileContests.rejected, (state, action: any) => {
            state.contests.status = 'failed';
            state.contests.error = action.payload;
        });
    },
});

export const { setProfileStatus } = profileSlice.actions;
export const profileReducer = profileSlice.reducer;