import React, { useState } from "react";
import {
  Box,
  Paper,
  Typography,
  TextField,
  Button,
  FormControl,
  InputLabel,
  Select,
  MenuItem,
  Stack,
  Grid,
  CircularProgress,
  Alert,
} from "@mui/material";
import RocketLaunchIcon from "@mui/icons-material/RocketLaunch";
import CheckCircleOutlineIcon from "@mui/icons-material/CheckCircleOutline";
import { alpha } from "@mui/material/styles";
import InfoIconWithTooltip from "../../../../components/shared/InfoIconWithTooltip";
import { MODEL_TYPES } from "../../../../pages/LeaderboardPage/components/Leaderboard/constants/modelTypes";
import { SUBMISSION_PRECISIONS } from "../../../../pages/LeaderboardPage/components/Leaderboard/constants/defaults";
import AuthContainer from "../../../../components/shared/AuthContainer";

const WEIGHT_TYPES = [
  { value: "Original", label: "Original" },
  { value: "Delta", label: "Delta" },
  { value: "Adapter", label: "Adapter" },
];

const HELP_TEXTS = {
  modelName: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Model Name on Hugging Face Hub
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        Your model must be public and loadable with AutoClasses without
        trust_remote_code. The model should be in Safetensors format for better
        safety and loading performance. Example: braindecode/EEGNetv4
      </Typography>
    </Box>
  ),
  revision: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Model Revision
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        Git branch, tag or commit hash. The evaluation will be strictly tied to
        this specific commit to ensure consistency. Make sure this version is
        stable and contains all necessary files.
      </Typography>
    </Box>
  ),
  modelType: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Adapter / Fine-tuning Method
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        LoRA: Low-Rank Adaptation (~98% param reduction){" "}
        IA3: Scaling vectors only (~99.5% reduction){" "}
        AdaLoRA: Adaptive rank allocation{" "}
        DoRA: Weight-decomposed adaptation{" "}
        OFT: Orthogonal fine-tuning{" "}
        Probe: Linear probing (head only){" "}
        Full Fine-tune: All parameters updated
      </Typography>
    </Box>
  ),
  baseModel: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Base Model Reference
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        Required for delta weights or adapters. This information is used to
        identify the original model and calculate the total parameter count by
        combining base model and adapter/delta parameters.
      </Typography>
    </Box>
  ),
  precision: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Model Precision
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        Size limits vary by precision: FP16/BF16: up to 500M parameters.
        8-bit: up to 1B parameters. 4-bit: up to 2B parameters.
        Choose carefully as incorrect precision can cause evaluation errors.
      </Typography>
    </Box>
  ),
  weightsType: (
    <Box sx={{ p: 1 }}>
      <Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 0.5 }}>
        Weights Format
      </Typography>
      <Typography variant="body2" sx={{ opacity: 0.9, lineHeight: 1.4 }}>
        Original: Complete model weights in safetensors format Delta: Weight
        differences from base model (requires base model for size calculation)
        Adapter: Lightweight fine-tuning layers (requires base model for size
        calculation)
      </Typography>
    </Box>
  ),
};

// Convert MODEL_TYPES to format expected by Select component
const modelTypeOptions = Object.entries(MODEL_TYPES).map(
  ([value, { label }]) => ({
    value,
    label,
  })
);

function ModelSubmissionForm({ user, isAuthenticated }) {
  const [formData, setFormData] = useState({
    modelName: "",
    revision: "main",
    modelType: "lora",
    precision: "float16",
    weightsType: "Original",
    baseModel: "",
  });
  const [error, setError] = useState(null);
  const [submitting, setSubmitting] = useState(false);
  const [success, setSuccess] = useState(false);
  const [submittedData, setSubmittedData] = useState(null);

  const handleChange = (event) => {
    const { name, value, checked } = event.target;
    setFormData((prev) => ({
      ...prev,
      [name]: event.target.type === "checkbox" ? checked : value,
    }));
  };

  const handleSubmit = async (e) => {
    e.preventDefault();
    setError(null);
    setSubmitting(true);

    try {
      const response = await fetch("/api/models/submit", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          model_id: formData.modelName,
          revision: formData.revision,
          model_type: formData.modelType,
          precision: formData.precision,
          weight_type: formData.weightsType,
          base_model: formData.baseModel,
          user_id: user.username,
        }),
      });

      if (!response.ok) {
        const error = await response.json();
        throw new Error(error.detail || "Failed to submit model");
      }

      setSubmittedData(formData);
      setSuccess(true);
    } catch (error) {
      setError(error.message);
    } finally {
      setSubmitting(false);
    }
  };

  if (success && submittedData) {
    return (
      <Paper
        variant="outlined"
        sx={(theme) => ({
          p: 6,
          mb: 3,
          bgcolor: alpha(theme.palette.success.main, 0.05),
          borderColor: alpha(theme.palette.success.main, 0.2),
        })}
      >
        <Stack spacing={3}>
          <Stack direction="row" spacing={2} alignItems="center">
            <CheckCircleOutlineIcon color="success" sx={{ fontSize: 28 }} />
            <Typography
              variant="h5"
              sx={{ fontWeight: 600, color: "success.800" }}
            >
              Model submitted successfully!
            </Typography>
          </Stack>

          <Typography variant="body1">
            Your model <strong>{submittedData.modelName}</strong> has been added
            to the evaluation queue with the following parameters:
          </Typography>

          <Paper
            variant="outlined"
            sx={{
              p: 2,
              borderColor: "divider",
            }}
          >
            <Stack spacing={1.5}>
              <Stack direction="row" spacing={2}>
                <Typography
                  variant="body2"
                  color="text.secondary"
                  sx={{ width: 120 }}
                >
                  Model:
                </Typography>
                <Typography variant="body2" sx={{ fontFamily: "monospace" }}>
                  {submittedData.modelName}
                </Typography>
              </Stack>
              <Stack direction="row" spacing={2}>
                <Typography
                  variant="body2"
                  color="text.secondary"
                  sx={{ width: 120 }}
                >
                  Type:
                </Typography>
                <Typography variant="body2">
                  {submittedData.modelType}
                </Typography>
              </Stack>
              <Stack direction="row" spacing={2}>
                <Typography
                  variant="body2"
                  color="text.secondary"
                  sx={{ width: 120 }}
                >
                  Revision:
                </Typography>
                <Typography variant="body2" sx={{ fontFamily: "monospace" }}>
                  {submittedData.revision}
                </Typography>
              </Stack>
              <Stack direction="row" spacing={2}>
                <Typography
                  variant="body2"
                  color="text.secondary"
                  sx={{ width: 120 }}
                >
                  Precision:
                </Typography>
                <Typography variant="body2">
                  {submittedData.precision}
                </Typography>
              </Stack>
              <Stack direction="row" spacing={2}>
                <Typography
                  variant="body2"
                  color="text.secondary"
                  sx={{ width: 120 }}
                >
                  Weight type:
                </Typography>
                <Typography variant="body2">
                  {submittedData.weightsType}
                </Typography>
              </Stack>
              {submittedData.baseModel && (
                <Stack direction="row" spacing={2}>
                  <Typography
                    variant="body2"
                    color="text.secondary"
                    sx={{ width: 120 }}
                  >
                    Base model:
                  </Typography>
                  <Typography variant="body2">
                    {submittedData.baseModel}
                  </Typography>
                </Stack>
              )}
            </Stack>
          </Paper>

          <Typography variant="body2" color="text.secondary">
            An automatic upvote has been added to your model to help with
            prioritization.
          </Typography>

          <Stack direction="row" spacing={2}>
            <Button
              variant="outlined"
              size="large"
              onClick={() => {
                setSuccess(false);
                setSubmittedData(null);
                setFormData({
                  modelName: "",
                  revision: "main",
                  modelType: "lora",
                  precision: "float16",
                  weightsType: "Original",
                  baseModel: "",
                });
              }}
            >
              Submit another model
            </Button>
          </Stack>
        </Stack>
      </Paper>
    );
  }

  return (
    <>
      {error && (
        <Alert severity="error" sx={{ mb: 2 }}>
          {error}
        </Alert>
      )}
      <AuthContainer actionText="submit a model" />
      {isAuthenticated && (
        <Paper
          elevation={0}
          component="form"
          onSubmit={handleSubmit}
          sx={{
            p: 0,
            border: "1px solid",
            borderColor: "grey.300",
            mb: 3,
            overflow: "hidden",
          }}
        >
          {/* Header */}
          <Box
            sx={{
              px: 3,
              py: 2,
              borderBottom: "1px solid",
              borderColor: (theme) =>
                theme.palette.mode === "dark"
                  ? alpha(theme.palette.divider, 0.1)
                  : "grey.200",
              bgcolor: (theme) =>
                theme.palette.mode === "dark"
                  ? alpha(theme.palette.background.paper, 0.5)
                  : "grey.50",
            }}
          >
            <Typography
              variant="h6"
              sx={{ fontWeight: 600, color: "text.primary" }}
            >
              Model Submission Form
            </Typography>
          </Box>

          {/* Form Content */}
          <Box sx={{ p: 3 }}>
            <Grid container spacing={3}>
              {/* Model Information */}
              <Grid item xs={12}>
                <Stack direction="row" spacing={1} alignItems="center">
                  <Typography variant="h6">Model Information</Typography>
                  <InfoIconWithTooltip tooltip={HELP_TEXTS.modelName} />
                </Stack>
              </Grid>

              <Grid item xs={12} sm={8}>
                <TextField
                  required
                  fullWidth
                  name="modelName"
                  label="Model Name"
                  placeholder="organization/model-name"
                  value={formData.modelName}
                  onChange={handleChange}
                  helperText="Example: braindecode/EEGNetv4"
                  InputProps={{
                    endAdornment: (
                      <InfoIconWithTooltip tooltip={HELP_TEXTS.modelName} />
                    ),
                  }}
                />
              </Grid>

              <Grid item xs={12} sm={4}>
                <TextField
                  fullWidth
                  name="revision"
                  label="Revision commit"
                  value={formData.revision}
                  onChange={handleChange}
                  helperText="Default: main"
                  InputProps={{
                    endAdornment: (
                      <InfoIconWithTooltip tooltip={HELP_TEXTS.revision} />
                    ),
                  }}
                />
              </Grid>

              {/* Model Configuration */}
              <Grid item xs={12}>
                <Stack direction="row" spacing={1} alignItems="center">
                  <Typography variant="h6">Model Configuration</Typography>
                </Stack>
              </Grid>

              <Grid item xs={12} sm={6}>
                <FormControl fullWidth>
                  <InputLabel>Model Type</InputLabel>
                  <Select
                    name="modelType"
                    value={formData.modelType}
                    onChange={handleChange}
                    label="Model Type"
                    endAdornment={
                      <InfoIconWithTooltip
                        tooltip={HELP_TEXTS.modelType}
                        sx={{ mr: 2 }}
                      />
                    }
                  >
                    {modelTypeOptions.map((type) => (
                      <MenuItem key={type.value} value={type.value}>
                        {type.label}
                      </MenuItem>
                    ))}
                  </Select>
                </FormControl>
              </Grid>

              <Grid item xs={12} sm={6}>
                <FormControl fullWidth>
                  <InputLabel>Precision</InputLabel>
                  <Select
                    name="precision"
                    value={formData.precision}
                    onChange={handleChange}
                    label="Precision"
                    endAdornment={
                      <InfoIconWithTooltip
                        tooltip={HELP_TEXTS.precision}
                        sx={{ mr: 2 }}
                      />
                    }
                  >
                    {SUBMISSION_PRECISIONS.map((option) => (
                      <MenuItem key={option.value} value={option.value}>
                        {option.label}
                      </MenuItem>
                    ))}
                  </Select>
                </FormControl>
              </Grid>

              <Grid item xs={12} sm={6}>
                <FormControl fullWidth>
                  <InputLabel>Weights Type</InputLabel>
                  <Select
                    name="weightsType"
                    value={formData.weightsType}
                    onChange={handleChange}
                    label="Weights Type"
                    endAdornment={
                      <InfoIconWithTooltip
                        tooltip={HELP_TEXTS.weightsType}
                        sx={{ mr: 2 }}
                      />
                    }
                  >
                    {WEIGHT_TYPES.map((type) => (
                      <MenuItem key={type.value} value={type.value}>
                        {type.label}
                      </MenuItem>
                    ))}
                  </Select>
                </FormControl>
              </Grid>

              {formData.weightsType !== "Original" && (
                <Grid item xs={12}>
                  <TextField
                    fullWidth
                    required={
                      formData.weightsType === "Delta" ||
                      formData.weightsType === "Adapter"
                    }
                    name="baseModel"
                    label="Base Model"
                    value={formData.baseModel}
                    onChange={handleChange}
                    InputProps={{
                      endAdornment: (
                        <InfoIconWithTooltip tooltip={HELP_TEXTS.baseModel} />
                      ),
                    }}
                  />
                </Grid>
              )}

              {/* Submit Button */}
              <Grid item xs={12}>
                <Box
                  sx={{
                    display: "flex",
                    justifyContent: "space-between",
                    alignItems: "center",
                    mt: 2,
                  }}
                >
                  <Typography variant="body2" color="text.secondary">
                    All fields marked with * are required
                  </Typography>
                  <Button
                    type="submit"
                    variant="contained"
                    disabled={submitting}
                    endIcon={submitting ? null : <RocketLaunchIcon />}
                    sx={{
                      minWidth: 120,
                      position: "relative",
                    }}
                  >
                    {submitting ? (
                      <CircularProgress size={24} color="inherit" />
                    ) : (
                      "Submit"
                    )}
                  </Button>
                </Box>
              </Grid>
            </Grid>
          </Box>
        </Paper>
      )}
    </>
  );
}

export default ModelSubmissionForm;