import { postgrestLocalUrl, siteUrl } from './constants';
import { getDateFromSafeDate, getSafeDate } from './dates';
import { IVtuber, IStream, ITimestamp, IVod } from '@futureporn/types';
import qs from 'qs';
import { ITagVodRelation } from './tag-vod-relations';
import { IMeta, IMuxAsset, IMuxAssetResponse } from '@futureporn/types';
import { IS3File, IS3FileResponse } from '@/app/lib/b2File';
import fetchAPI from './fetch-api';
import { IUserResponse } from './users';
import { getCountFromHeaders } from './fetchers';

/**
 * Dec 2024 UUIDs were introduced.
 * Going forward, use UUIDs where possible.
 * safeDates are retained for backwards compatibility.
 * 
 * @see https://www.w3.org/Provider/Style/URI
 */
export interface IVodPageProps {
    params: {
        safeDateOrUUID: string;
        slug: string;
    };
}




const fetchVodsOptions = {
    next: {
        tags: ['vods']
    }
}


export async function getVodFromSafeDateOrUUID(safeDateOrUUID: string): Promise<IVod | null> {
    let vod: IVod | null;
    let date: Date;
    if (!safeDateOrUUID) {
        console.log(`safeDateOrUUID was missing`);
        return null;
    } else if (/^[0-9a-f]{8}-[0-9a-f]{4}-[0-5][0-9a-f]{3}-[089ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(safeDateOrUUID)) {
        console.log('this is a UUID!');
        vod = await getVodByUUID(safeDateOrUUID);
        if (!vod) return null;
    } else {
        console.log(`this is a safe date. ${safeDateOrUUID}`)
        date = getDateFromSafeDate(safeDateOrUUID);
        console.log(`date=${date.toISOString()}`)
        if (!date) {
            console.log('there is no date')
            return null;
        }
        vod = await getVodForDate(date);
    }
    return vod;
}



export function getUrl(vod: IVod, slug: string, date: string): string {
    return `/vt/${slug}/vod/${getSafeDate(date)}`
}


export function getPaginatedUrl(): (slug: string, pageNumber: number) => string {
    return (slug: string, pageNumber: number) => {
        return `${siteUrl}/vt/${slug}/vods/${pageNumber}`
    }
}


/** @deprecated old format for futureporn.net/api/v1.json, which is deprecated. Please use getUrl() instead */
export function getDeprecatedUrl(vod: IVod): string {
    return `${siteUrl}/vods/${getSafeDate(vod.date_2)}`
}


export async function getNextVod(vod: IVod): Promise<IVod|null> {
    const query = new URLSearchParams({
        select: 'date_2,title,announce_title,vtuber:vtubers(slug)',
        [`date_2`]: `gt.${vod.date_2}`,
        [`vtuber.slug`]: `eq.${vod.vtuber.slug}`,
        ['published_at']: 'not.is.null',
        limit: '1',
        order: 'date_2.asc',
    }).toString();
    const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions)
    const data = await res.json()
    if (!res.ok) {
        throw new Error(`res.status=${res.status} res.statusText=${res.statusText} \ndata=${JSON.stringify(data, null, 2)}`);
    }
    return data[0];
}


export function getLocalizedDate(vod: IVod): string {
    return new Date(vod.date_2).toLocaleDateString()
}

export async function getPreviousVod(vod: IVod): Promise<IVod> {
    const query = new URLSearchParams({
        select: 'date_2,title,announce_title,vtuber:vtubers(slug)',
        [`date_2`]: `lt.${vod.date_2}`,
        [`vtuber.slug`]: `eq.${vod.vtuber.slug}`,
        limit: '1',
        order: 'date_2.desc',
    }).toString();
    const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions)
    const data = await res.json()
    if (!res.ok) {
        throw new Error(`res.status=${res.status} res.statusText=${res.statusText} \ndata=${JSON.stringify(data, null, 2)}`);
    }
    return data[0];
}

export async function getVodByUUID(uuid: string): Promise<IVod | null> {
    const query = new URLSearchParams({
        uuid: `eq.${uuid}`,
        select: `
            vtuber(slug,displayName,image,imageBlur,themeColor),
            muxAsset(playbackId,assetId),
            thumbnail(cdnUrl,url),
            tagVodRelations(tag,createdAt,creatorId,tag(*)),
            videoSrcB2(url,key,uploadId,cdnUrl),
            stream(archiveStatus,date,tweet,uuid),
            timestamps_vod_links(timestamps(timestamps_tag_links(tags(id,name))))
        `.replace(/\s+/g, ''), // Remove whitespace for URL encoding
    });
    

    try {
        const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, { cache: 'no-store', next: { tags: ['vods'] } })
        if (!res.ok) {
            throw new Error('failed to fetch getVodByUUID')
        }
        const json = await res.json()
        const vod = json.data[0]
        if (!vod) return null;
        return vod;
    } catch (e) {
        if (e instanceof Error) {
            console.error(e)
        }
        return null;
    }
}
export async function getVodForDate(date: Date): Promise<IVod | null> {
    const iso8601DateString = date.toISOString();
    console.log(`getVodForDate ison8601DateString=${iso8601DateString}`)

    const selectFields = [
        'id',
        'date_2',
        'title',
        'announce_title',
        'vtuber:vtubers(slug,display_name,image,image_blur,theme_color)',
        'timestamps_vod_links(timestamps(timestamps_tag_links(tags(id,name))))',
    ].join(',');
    
    const queryParams = {
        select: selectFields,
        date_2: `eq.${iso8601DateString}`,
        published_at: 'not.is.null',
        limit: '1',
    };

    const query = new URLSearchParams(queryParams).toString();

    console.log(query)
    
    const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, {
        cache: 'no-store',
        next: { tags: ['vods'] }
    });

    const json = await res.json();
    if (!res.ok) {
        console.log(`res.status=${res.status} res.statusText=${res.statusText} body=${JSON.stringify(json, null, 2)}`)
        throw new Error('Failed to fetch vodForDate');
    }

    const vod = json[0]; // PostgREST returns an array of results
    if (!vod) return null;

    return vod;

}


export async function getVod(id: number): Promise<IVod | null> {
    const query = qs.stringify(
        {
            filters: {
                id: {
                    $eq: id
                }
            }
        }
    )
    const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions);
    if (!res.ok) return null;
    const data = await res.json();
    return data;
}

export async function getVods(page: number = 1, pageSize: number = 25, sortDesc = true): Promise<{ vods: IVod[], count: number }> {
    // const query = qs.stringify(
    //     {
    //         populate: {
    //             vtuber: {
    //                 fields: ['slug', 'displayName', 'image', 'imageBlur']
    //             },
    //             muxAsset: {
    //                 fields: ['playbackId', 'assetId']
    //             },
    //             thumbnail: {
    //                 fields: ['cdnUrl', 'url']
    //             },
    //             tagVodRelations: {
    //                 fields: ['tag'],
    //                 populate: ['tag']
    //             },
    //             videoSrcB2: {
    //                 fields: ['url', 'key', 'uploadId', 'cdnUrl']
    //             }
    //         },
    //         sort: {
    //             date: (sortDesc) ? 'desc' : 'asc'
    //         },
    //         pagination: {
    //             pageSize: pageSize,
    //             page: page
    //         }
    //     }
    // )

    // console.log(`postgrestLocalUrl=${postgrestLocalUrl} query=${query}`)
    // const url = `${configs.postgrestUrl}/vods?select=*,segments(*),recording:recordings(is_aborted)&id=eq.${vodId}`
    const selects = [
        '*',
        'vtuber:vtubers(id,slug,image,display_name,image_blur)',
        // 'mux_asset:mux_assets(playback_id,asset_id)',
        'thumbnail:b2_files(cdn_url)'
    ]
    const queryObject = {
        select: selects.join(','),
        limit: pageSize,
        offset: page*pageSize
    };
    const query = qs.stringify(queryObject, { encode: false });

    const res = await fetch(
        `${postgrestLocalUrl}/vods?${query}`,
        Object.assign({}, fetchVodsOptions, { headers: {
            'Prefer': 'count=exact'
        }})
    );
    const data = await res.json()
    if (!res.ok) {
        throw new Error(`Failed to fetch vods status=${res.status}, statusText=${res.statusText}, data=${data}`);
    }

    console.log(`${data.length} vods. sample as follows.`)
    console.log(data[0])

    const count = getCountFromHeaders(res)
    
    return {
        vods: data,
        count: count
    }
}



export async function getAllVods(): Promise<IVod[] | null> {
    const pageSize = 100; // Adjust this value as needed
    const sortDesc = true; // Adjust the sorting direction as needed

    const allVods: IVod[] = [];
    let currentPage = 1;

    while (true) {
        const query = qs.stringify({
            populate: {
                vtuber: {
                    fields: ['slug', 'displayName', 'image', 'imageBlur'],
                },
                muxAsset: {
                    fields: ['playbackId', 'assetId'],
                },
                thumbnail: {
                    fields: ['cdnUrl', 'url'],
                },
                tagVodRelations: {
                    fields: ['tag'],
                    populate: ['tag'],
                },
                videoSrcB2: {
                    fields: ['url', 'key', 'uploadId', 'cdnUrl'],
                },
            },
            sort: {
                date: sortDesc ? 'desc' : 'asc',
            },
            pagination: {
                pageSize,
                page: currentPage,
            },
        });

        try {
            const response = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions);

            if (!response.ok) {
                // Handle non-successful response (e.g., HTTP error)
                throw new Error(`HTTP error! Status: ${response.status}`);
            }

            const responseData = await response.json();

            if (!responseData.data || responseData.data.length === 0) {
                // No more data to fetch
                break;
            }

            allVods.push(...responseData.data);
            currentPage++;
        } catch (error) {
            // Handle fetch error
            if (error instanceof Error) {
                console.error('Error fetching data:', error.message);
            }
            return null;
        }
    }

    return allVods;
}



export async function getVodsForVtuber(vtuberId: number, page: number = 1, pageSize: number = 25, sortDesc = true): Promise<{ vods: IVod[] | null, count: number }> {
    const res = await fetch(`${postgrestLocalUrl}/vods?limit=${pageSize}&offset=${page*pageSize}&select=*,thumbnail:b2_files(cdn_url),vtuber:vtubers(id,slug,image,display_name,image_blur)&vtuber.id=eq.${vtuberId}`, fetchVodsOptions)
    if (!res.ok) {
        const body = await res.text()
        console.error(`getVodsForVtuber() failed. ok=${res.ok} status=${res.status} statusText=${res.statusText} body=${body}`);
        return { vods: null, count: 0 };
    }
    const vods = await res.json() as IVod[];
    const count = getCountFromHeaders(res)
    return { vods, count };
}


export async function getVodsForTag(tag: string): Promise<IVod[] | null> {
    // const query = qs.stringify(
    //     {
    //         populate: {
    //             vtuber: {
    //                 fields: ['slug', 'displayName', 'image', 'imageBlur']
    //             },
    //             videoSrcB2: {
    //                 fields: ['url', 'key', 'uploadId', 'cdnUrl']
    //             }
    //         },
    //         filters: {
    //             tagVodRelations: {
    //                 tag: {
    //                     name: {
    //                         $eq: tag
    //                     }
    //                 }
    //             }
    //         }
    //     }
    // )
    const query = 'select(*),vtuber:vtubers(id,slug,image,display_name,image_blur),thumbnail:b2_files(cdn_url)'
    const res = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions)
    if (!res.ok) return null;
    const vods = await res.json()
    return vods;
}

/**
 * This returns stale data, because futureporn-historian is broken.
 * @todo get live data from historian
 * @see https://git.futureporn.net/futureporn/futureporn-historian/issues/1
 */
export async function getProgress(vtuberSlug: string): Promise<{ complete: number; total: number }> {
    const query = qs.stringify({
        filters: {
            vtuber: {
                slug: {
                    $eq: vtuberSlug
                }
            }
        }
    })
    const data = await fetch(`${postgrestLocalUrl}/vods?${query}`, fetchVodsOptions)
        .then((res) => res.json())
        .then((g) => {
            return g
        })

    const total = data.meta.pagination.total

    return {
        complete: total,
        total: total
    }
}