import React, {useEffect, useState} from 'react';
import {
    Container, Box, Typography, Button, IconButton, Dialog, DialogTitle, DialogContent
} from '@mui/material';
import CloseIcon from '@mui/icons-material/Close';
import AutoFixHighIcon from '@mui/icons-material/AutoFixHigh';
import ListIcon from '@mui/icons-material/List';

import BuildDetailsDialog from '../../components/BuildDetailsDialog';
import BuildCard from '../../components/BuildCard';

import {onGetApprovedBuilds, onGetAuthState, onCloneBuild} from '../+Layout.telefunc';

export default function HomePage() {
    const [data, setData] = useState<any>(null);
    const [allRanked, setAllRanked] = useState<any[]>([]);

    const [selectedBuildId, setSelectedBuildId] = useState<number | null>(null);
    const [openRankedPopup, setOpenRankedPopup] = useState(false);

    useEffect(() => {
        async function loadSite() {
            try {
                const [
                    authData,
                    highestRankedBuilds,
                    communityBuilds,
                    fullRankedList
                ] = await Promise.all([
                    onGetAuthState(),
                    onGetApprovedBuilds({limit: 5, sort: 'rating_desc'}),
                    onGetApprovedBuilds({limit: 12}),
                    onGetApprovedBuilds({limit: 20, sort: 'rating_desc'})
                ]);

                setData({
                    isLoggedIn: authData.isLoggedIn,
                    userId: authData.userId,
                    prebuilts: highestRankedBuilds,
                    communityBuilds: communityBuilds
                });
                setAllRanked(fullRankedList);
            } catch (error) {
                console.error("Error loading homepage data:", error);
            }
        }

        loadSite();
    }, []);

    const handleCloneWrapper = async (buildId: number) => {
        if (!data?.isLoggedIn) return alert("Please login to clone builds!");
        if (confirm(`Clone this build to your dashboard?`)) {
            await onCloneBuild({buildId});
            alert("Build cloned! Check your dashboard.");
            setSelectedBuildId(null);
        }
    };

    if (!data) return <Box sx={{p: 10, textAlign: 'center'}}>Loading Forge...</Box>;

    return (
        <Box>
            <Box sx={{
                position: 'relative', height: '500px',
                display: 'flex', alignItems: 'center', justifyContent: 'center', color: 'white',
                '&::before': {
                    content: '""', position: 'absolute', top: 0, left: 0, width: '100%', height: '100%',
                    backgroundColor: 'rgba(0,0,0,0.6)'
                }
            }}>
                <Box sx={{position: 'relative', textAlign: 'center', zIndex: 1, p: 2}}>
                    <Typography variant="h2" fontWeight="bold" gutterBottom>Forge Your Ultimate Machine</Typography>
                    <Typography variant="h5" sx={{maxWidth: '800px', mx: 'auto', mb: 1}}>
                        Build, share, discuss, and discover custom PC configurations.
                    </Typography>
                    <Button variant="contained" size="large" href="/forge" startIcon={<AutoFixHighIcon/>}
                            sx={{fontSize: '1.2rem', px: 4, py: 1.5, mt: 2}}>
                        Start Forging
                    </Button>
                </Box>
            </Box>

            <Container maxWidth="xl" sx={{mt: 6, mb: 10}}>
                <Box sx={{
                    mb: 2, borderLeft: '5px solid #ff8201', pl: 1,
                    display: 'flex', justifyContent: 'space-between', alignItems: 'end'
                }}>
                    <Box>
                        <Typography variant="h4" fontWeight="bold">Hall of Fame</Typography>
                        <Typography variant="subtitle1" color="text.secondary">
                            The highest rated configurations from across the community.
                        </Typography>
                    </Box>
                    <Button variant="outlined" startIcon={<ListIcon/>} onClick={() => setOpenRankedPopup(true)}>
                        Show All Top Ranked
                    </Button>
                </Box>
                <Box
                    sx={{
                        display: 'grid',
                        gridTemplateColumns: {
                            xs: '1fr',
                            sm: 'repeat(2, 1fr)',
                            md: 'repeat(3, 1fr)',
                            lg: 'repeat(4, 1fr)',
                            xl: 'repeat(5, 1fr)',
                        },
                        gap: 3,
                        width: '100%',
                        mb: 8
                    }}
                >
                    {data.prebuilts.map((build: any) => (
                        <BuildCard
                            key={build.id}
                            build={build}
                            onClick={() => setSelectedBuildId(build.id)}
                        />
                    ))}
                </Box>

                <Box sx={{
                    mb: 2, mt: 2, borderLeft: '5px solid #ff8201', pl: 1,
                }}>
                    <Typography variant="h4" fontWeight="bold" color="text.primary">Community Forge</Typography>
                    <Typography variant="subtitle1" color="text.secondary" sx={{mb: 2}}>Fresh builds from users around the world.</Typography>
                </Box>
                <Box
                    sx={{
                        display: 'grid',
                        gridTemplateColumns: {
                            xs: '1fr',
                            sm: 'repeat(2, 1fr)',
                            md: 'repeat(3, 1fr)',
                            lg: 'repeat(4, 1fr)',
                            xl: 'repeat(5, 1fr)',
                        },
                        gap: 3,
                        width: '100%',
                    }}
                >
                    {data.communityBuilds.map((build: any) => (
                        <BuildCard
                            key={build.id}
                            build={build}
                            onClick={() => setSelectedBuildId(build.id)}
                        />
                    ))}
                </Box>

                <Box sx={{display: 'flex', justifyContent: 'center', mt: 6}}>
                    <Button variant="outlined" size="large" href="/completed-builds">View All Community Builds</Button>
                </Box>
            </Container>

            <BuildDetailsDialog
                open={!!selectedBuildId}
                buildId={selectedBuildId}
                currentUser={data.userId}
                onClose={() => setSelectedBuildId(null)}
                onClone={handleCloneWrapper}
            />

            <Dialog open={openRankedPopup} onClose={() => setOpenRankedPopup(false)} maxWidth="xl" fullWidth scroll="paper">
                <DialogTitle sx={{display: 'flex', justifyContent: 'space-between', alignItems: 'center'}}>
                    Hall of Fame (Top Rated)
                    <IconButton onClick={() => setOpenRankedPopup(false)}><CloseIcon/></IconButton>
                </DialogTitle>
                <DialogContent dividers sx={{p: 3}}>
                    <Box
                        sx={{
                            display: 'grid',
                            gridTemplateColumns: {
                                xs: '1fr',
                                sm: 'repeat(2, 1fr)',
                                md: 'repeat(3, 1fr)',
                                lg: 'repeat(4, 1fr)',
                                xl: 'repeat(5, 1fr)',
                            },
                            gap: 3,
                            width: '100%'
                        }}
                    >
                        {allRanked.map((build: any, index: number) => (
                            <Box key={`ranked-${build.id}`} sx={{position: 'relative', width: '100%'}}>
                                <Box sx={{
                                    position: 'absolute',
                                    top: -10,
                                    left: -10,
                                    zIndex: 1,
                                    width: 35,
                                    height: 35,
                                    borderRadius: '50%',
                                    bgcolor: index < 3 ? '#ff8201' : 'grey.800',
                                    color: 'white',
                                    display: 'flex',
                                    alignItems: 'center',
                                    justifyContent: 'center',
                                    fontWeight: 'bold',
                                    border: '2px solid white',
                                    boxShadow: 2,
                                }}>
                                    #{index + 1}
                                </Box>
                                <BuildCard
                                    build={build}
                                    onClick={() => {
                                        setOpenRankedPopup(false);
                                        setSelectedBuildId(build.id);
                                    }}
                                />
                            </Box>
                        ))}
                    </Box>
                </DialogContent>
            </Dialog>
        </Box>
    );
}