import React, { useState, useEffect } from "react";
import {
  Card,
  Title,
  Text,
  Tab,
  TabList,
  TabGroup,
  TabPanel,
  TabPanels,
  Grid,
  Badge,
  Button as TremorButton,
  TextInput,
} from "@tremor/react";
import NumericalInput from "./shared/numerical_input";
import { ArrowLeftIcon, TrashIcon, KeyIcon } from "@heroicons/react/outline";
import { modelDeleteCall, modelUpdateCall, CredentialItem, credentialGetCall, credentialCreateCall, modelInfoCall, modelInfoV1Call } from "./networking";
import { Button, Form, Input, InputNumber, message, Select, Modal } from "antd";
import EditModelModal from "./edit_model/edit_model_modal";
import { handleEditModelSubmit } from "./edit_model/edit_model_modal";
import { getProviderLogoAndName } from "./provider_info_helpers";
import { getDisplayModelName } from "./view_model/model_name_display";
import AddCredentialsModal from "./model_add/add_credentials_tab";
import ReuseCredentialsModal from "./model_add/reuse_credentials";

interface ModelInfoViewProps {
  modelId: string;
  onClose: () => void;
  modelData: any;
  accessToken: string | null;
  userID: string | null;
  userRole: string | null;
  editModel: boolean;
  setEditModalVisible: (visible: boolean) => void;
  setSelectedModel: (model: any) => void;
  onModelUpdate?: (updatedModel: any) => void;
}

export default function ModelInfoView({ 
  modelId, 
  onClose, 
  modelData, 
  accessToken,
  userID,
  userRole,
  editModel,
  setEditModalVisible,
  setSelectedModel,
  onModelUpdate
}: ModelInfoViewProps) {
  const [form] = Form.useForm();
  const [localModelData, setLocalModelData] = useState<any>(null);
  const [isDeleteModalOpen, setIsDeleteModalOpen] = useState(false);
  const [isCredentialModalOpen, setIsCredentialModalOpen] = useState(false);
  const [isDirty, setIsDirty] = useState(false);
  const [isSaving, setIsSaving] = useState(false);
  const [isEditing, setIsEditing] = useState(false);
  const [existingCredential, setExistingCredential] = useState<CredentialItem | null>(null);

  const canEditModel = userRole === "Admin" || modelData.model_info.created_by === userID;
  const isAdmin = userRole === "Admin";

  const usingExistingCredential = modelData.litellm_params?.litellm_credential_name != null && modelData.litellm_params?.litellm_credential_name != undefined;
  console.log("usingExistingCredential, ", usingExistingCredential);
  console.log("modelData.litellm_params.litellm_credential_name, ", modelData.litellm_params.litellm_credential_name);
  

  useEffect(() => {
    const getExistingCredential = async () => {
      console.log("accessToken, ", accessToken);
      if (!accessToken) return;
      if (usingExistingCredential) return;
      let existingCredentialResponse = await credentialGetCall(accessToken, null, modelId);
      console.log("existingCredentialResponse, ", existingCredentialResponse);
      setExistingCredential({
        credential_name: existingCredentialResponse["credential_name"],
        credential_values: existingCredentialResponse["credential_values"], 
        credential_info: existingCredentialResponse["credential_info"]
      });
    }

    const getModelInfo = async () => {
      if (!accessToken) return;
      let modelInfoResponse = await modelInfoV1Call(accessToken, modelId);
      console.log("modelInfoResponse, ", modelInfoResponse);
      let specificModelData = modelInfoResponse.data[0];
      setLocalModelData(specificModelData);
    }
    getExistingCredential();
    getModelInfo();
  }, [accessToken, modelId]);

  const handleReuseCredential = async (values: any) => {
    console.log("values, ", values);
    if (!accessToken) return;
    let credentialItem = {
      credential_name: values.credential_name,
      model_id: modelId,
      credential_info: {
        "custom_llm_provider": localModelData.litellm_params?.custom_llm_provider,
      }
    }
    message.info("Storing credential..");
    let credentialResponse = await credentialCreateCall(accessToken, credentialItem);
    console.log("credentialResponse, ", credentialResponse);
    message.success("Credential stored successfully");
  }

  const handleModelUpdate = async (values: any) => {
    try {
      if (!accessToken) return;
      setIsSaving(true);
      
      const updateData = {
        model_name: values.model_name,
        litellm_params: {
          ...localModelData.litellm_params,
          model: values.litellm_model_name,
          api_base: values.api_base,
          custom_llm_provider: values.custom_llm_provider,
          organization: values.organization,
          tpm: values.tpm,
          rpm: values.rpm,
          max_retries: values.max_retries,
          timeout: values.timeout,
          stream_timeout: values.stream_timeout,
          input_cost_per_token: values.input_cost / 1_000_000,
          output_cost_per_token: values.output_cost / 1_000_000,
        },
        model_info: {
          id: modelId,
        }
      };

      await modelUpdateCall(accessToken, updateData);
      
      const updatedModelData = {
        ...localModelData,
        model_name: values.model_name,
        litellm_model_name: values.litellm_model_name,
        litellm_params: updateData.litellm_params
      };
      
      setLocalModelData(updatedModelData);

      if (onModelUpdate) {
        onModelUpdate(updatedModelData);
      }

      message.success("Model settings updated successfully");
      setIsDirty(false);
      setIsEditing(false);
    } catch (error) {
      console.error("Error updating model:", error);
      message.error("Failed to update model settings");
    } finally {
      setIsSaving(false);
    }
  };

  if (!modelData) {
    return (
      <div className="p-4">
        <Button 
          icon={<ArrowLeftIcon />}
          onClick={onClose}
          className="mb-4"
        >
          Back to Models
        </Button>
        <Text>Model not found</Text>
      </div>
    );
  }

  const handleDelete = async () => {
    try {
      if (!accessToken) return;
      await modelDeleteCall(accessToken, modelId);
      message.success("Model deleted successfully");
      
      if (onModelUpdate) {
        onModelUpdate({ 
          deleted: true, 
          model_info: { id: modelId } 
        });
      }
      
      onClose();
    } catch (error) {
      console.error("Error deleting the model:", error);
      message.error("Failed to delete model");
    }
  };


  return (
    <div className="p-4">
      <div className="flex justify-between items-center mb-6">
        <div>
          <Button 
            icon={<ArrowLeftIcon />}
            onClick={onClose}
            className="mb-4"
          >
            Back to Models
          </Button>
          <Title>Public Model Name: {getDisplayModelName(modelData)}</Title>
          <Text className="text-gray-500 font-mono">{modelData.model_info.id}</Text>
        </div>
        <div className="flex gap-2">
          {isAdmin && (
            <TremorButton
              icon={KeyIcon}
              variant="secondary"
              onClick={() => setIsCredentialModalOpen(true)}
              className="flex items-center"
            >
              Re-use Credentials
            </TremorButton>
          )}
          {canEditModel && (
            <TremorButton
              icon={TrashIcon}
              variant="secondary"
              onClick={() => setIsDeleteModalOpen(true)}
              className="flex items-center"
            >
              Delete Model
            </TremorButton>
          )}
        </div>
      </div>

      <TabGroup>
        <TabList className="mb-6">
          <Tab>Overview</Tab>
          <Tab>Raw JSON</Tab>
        </TabList>

        <TabPanels>
          <TabPanel>
            {/* Overview Grid */}
            <Grid numItems={1} numItemsSm={2} numItemsLg={3} className="gap-6 mb-6">
              <Card>
                <Text>Provider</Text>
                <div className="mt-2 flex items-center space-x-2">
                  {modelData.provider && (
                    <img
                      src={getProviderLogoAndName(modelData.provider).logo}
                      alt={`${modelData.provider} logo`}
                      className="w-4 h-4"
                      onError={(e) => {
                        // Create a div with provider initial as fallback
                        const target = e.target as HTMLImageElement;
                        const parent = target.parentElement;
                        if (parent) {
                          const fallbackDiv = document.createElement('div');
                          fallbackDiv.className = 'w-4 h-4 rounded-full bg-gray-200 flex items-center justify-center text-xs';
                          fallbackDiv.textContent = modelData.provider?.charAt(0) || '-';
                          parent.replaceChild(fallbackDiv, target);
                        }
                      }}
                    />
                  )}
                  <Title>{modelData.provider || "Not Set"}</Title>
                </div>
              </Card>
              <Card>
                <Text>LiteLLM Model</Text>
                <pre>
                  <Title>{modelData.litellm_model_name || "Not Set"}</Title>
                </pre>
              </Card>
              <Card>
                <Text>Pricing</Text>
                <div className="mt-2">
                  <Text>Input: ${modelData.input_cost}/1M tokens</Text>
                  <Text>Output: ${modelData.output_cost}/1M tokens</Text>
                </div>
              </Card>
            </Grid>

            {/* Audit info shown as a subtle banner below the overview */}
            <div className="mb-6 text-sm text-gray-500 flex items-center gap-x-6">
              <div className="flex items-center gap-x-2">
                <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>
                Created At {modelData.model_info.created_at 
                  ? new Date(modelData.model_info.created_at).toLocaleDateString('en-US', {
                      month: 'short',
                      day: 'numeric',
                      year: 'numeric'
                    })
                  : "Not Set"}
              </div>
              <div className="flex items-center gap-x-2">
                <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z" />
                </svg>
                Created By {modelData.model_info.created_by || "Not Set"}
              </div>
            </div>

            {/* Settings Card */}
            <Card>
              <div className="flex justify-between items-center mb-4">
                <Title>Model Settings</Title>
                {canEditModel && !isEditing && (
                  <TremorButton
                    variant="secondary"
                    onClick={() => setIsEditing(true)}
                    className="flex items-center"
                  >
                    Edit Model
                  </TremorButton>
                )}
              </div>
              {localModelData ? (
                <Form
                  form={form}
                  onFinish={handleModelUpdate}
                  initialValues={{
                  model_name: localModelData.model_name,
                  litellm_model_name: localModelData.litellm_model_name,
                  api_base: localModelData.litellm_params.api_base,
                  custom_llm_provider: localModelData.litellm_params.custom_llm_provider,
                  organization: localModelData.litellm_params.organization,
                  tpm: localModelData.litellm_params.tpm,
                  rpm: localModelData.litellm_params.rpm,
                  max_retries: localModelData.litellm_params.max_retries,
                  timeout: localModelData.litellm_params.timeout,
                  stream_timeout: localModelData.litellm_params.stream_timeout,
                  input_cost: localModelData.litellm_params.input_cost_per_token ? 
                    (localModelData.litellm_params.input_cost_per_token * 1_000_000) : localModelData.model_info?.input_cost_per_token * 1_000_000 || null,
                  output_cost: localModelData.litellm_params?.output_cost_per_token ? 
                    (localModelData.litellm_params.output_cost_per_token * 1_000_000) : localModelData.model_info?.output_cost_per_token * 1_000_000 || null,
                }}
                layout="vertical"
                onValuesChange={() => setIsDirty(true)}
              >
                <div className="space-y-4">
                  <div className="space-y-4">
                    <div>
                      <Text className="font-medium">Model Name</Text>
                      {isEditing ? (
                        <Form.Item name="model_name" className="mb-0">
                          <TextInput placeholder="Enter model name" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">{localModelData.model_name}</div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">LiteLLM Model Name</Text>
                      {isEditing ? (
                        <Form.Item name="litellm_model_name" className="mb-0">
                          <TextInput placeholder="Enter LiteLLM model name" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">{localModelData.litellm_model_name}</div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Input Cost (per 1M tokens)</Text>
                      {isEditing ? (
                        <Form.Item name="input_cost" className="mb-0">
                          <NumericalInput placeholder="Enter input cost" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData?.litellm_params?.input_cost_per_token 
                            ? (localModelData.litellm_params?.input_cost_per_token * 1_000_000).toFixed(4) 
                            : localModelData?.model_info?.input_cost_per_token ? (localModelData.model_info.input_cost_per_token * 1_000_000).toFixed(4) : null}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Output Cost (per 1M tokens)</Text>
                      {isEditing ? (
                        <Form.Item name="output_cost" className="mb-0">
                          <NumericalInput placeholder="Enter output cost" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData?.litellm_params?.output_cost_per_token 
                            ? (localModelData.litellm_params.output_cost_per_token * 1_000_000).toFixed(4) 
                            : localModelData?.model_info?.output_cost_per_token ? (localModelData.model_info.output_cost_per_token * 1_000_000).toFixed(4) : null}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">API Base</Text>
                      {isEditing ? (
                        <Form.Item name="api_base" className="mb-0">
                          <TextInput placeholder="Enter API base" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.api_base || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Custom LLM Provider</Text>
                      {isEditing ? (
                        <Form.Item name="custom_llm_provider" className="mb-0">
                          <TextInput placeholder="Enter custom LLM provider" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.custom_llm_provider || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Organization</Text>
                      {isEditing ? (
                        <Form.Item name="organization" className="mb-0">
                          <TextInput placeholder="Enter organization" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.organization || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">TPM (Tokens per Minute)</Text>
                      {isEditing ? (
                        <Form.Item name="tpm" className="mb-0">
                          <NumericalInput placeholder="Enter TPM" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.tpm || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">RPM (Requests per Minute)</Text>
                      {isEditing ? (
                        <Form.Item name="rpm" className="mb-0">
                          <NumericalInput placeholder="Enter RPM" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.rpm || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Max Retries</Text>
                      {isEditing ? (
                        <Form.Item name="max_retries" className="mb-0">
                          <NumericalInput placeholder="Enter max retries" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.max_retries || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Timeout (seconds)</Text>
                      {isEditing ? (
                        <Form.Item name="timeout" className="mb-0">
                          <NumericalInput placeholder="Enter timeout" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.timeout || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Stream Timeout (seconds)</Text>
                      {isEditing ? (
                        <Form.Item name="stream_timeout" className="mb-0">
                          <NumericalInput placeholder="Enter stream timeout" />
                        </Form.Item>
                      ) : (
                        <div className="mt-1 p-2 bg-gray-50 rounded">
                          {localModelData.litellm_params?.stream_timeout || "Not Set"}
                        </div>
                      )}
                    </div>

                    <div>
                      <Text className="font-medium">Team ID</Text>
                      <div className="mt-1 p-2 bg-gray-50 rounded">
                        {modelData.model_info.team_id || "Not Set"}
                      </div>
                    </div>
                  </div>

                  {isEditing && (
                    <div className="mt-6 flex justify-end gap-2">
                      <TremorButton
                        variant="secondary"
                        onClick={() => {
                          form.resetFields();
                          setIsDirty(false);
                          setIsEditing(false);
                        }}
                      >
                        Cancel
                      </TremorButton>
                      <TremorButton
                        variant="primary"
                        onClick={() => form.submit()}
                        loading={isSaving}
                      >
                        Save Changes
                      </TremorButton>
                    </div>
                  )}
                </div>
                </Form>
              ) : (
                <Text>Loading...</Text>
              )}
            </Card>
          </TabPanel>

          <TabPanel>
            <Card>
              <pre className="bg-gray-100 p-4 rounded text-xs overflow-auto">
                {JSON.stringify(modelData, null, 2)}
              </pre>
            </Card>
          </TabPanel>
        </TabPanels>
      </TabGroup>

      {/* Delete Confirmation Modal */}
      {isDeleteModalOpen && (
        <div className="fixed z-10 inset-0 overflow-y-auto">
          <div className="flex items-end justify-center min-h-screen pt-4 px-4 pb-20 text-center sm:block sm:p-0">
            <div className="fixed inset-0 transition-opacity" aria-hidden="true">
              <div className="absolute inset-0 bg-gray-500 opacity-75"></div>
            </div>

            <span className="hidden sm:inline-block sm:align-middle sm:h-screen" aria-hidden="true">&#8203;</span>

            <div className="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-lg sm:w-full">
              <div className="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
                <div className="sm:flex sm:items-start">
                  <div className="mt-3 text-center sm:mt-0 sm:ml-4 sm:text-left">
                    <h3 className="text-lg leading-6 font-medium text-gray-900">
                      Delete Model
                    </h3>
                    <div className="mt-2">
                      <p className="text-sm text-gray-500">
                        Are you sure you want to delete this model?
                      </p>
                    </div>
                  </div>
                </div>
              </div>
              <div className="bg-gray-50 px-4 py-3 sm:px-6 sm:flex sm:flex-row-reverse">
                <Button
                  onClick={handleDelete}
                  className="ml-2"
                  danger
                >
                  Delete
                </Button>
                <Button onClick={() => setIsDeleteModalOpen(false)}>
                  Cancel
                </Button>
              </div>
            </div>
          </div>
        </div>
      )}

      {isCredentialModalOpen && 
      !usingExistingCredential ? (
        <ReuseCredentialsModal
          isVisible={isCredentialModalOpen}
          onCancel={() => setIsCredentialModalOpen(false)}
          onAddCredential={handleReuseCredential}
          existingCredential={existingCredential}
          setIsCredentialModalOpen={setIsCredentialModalOpen}
        />
      ): (
        <Modal
          open={isCredentialModalOpen}
          onCancel={() => setIsCredentialModalOpen(false)}
          title="Using Existing Credential"
        >
          <Text>{modelData.litellm_params.litellm_credential_name}</Text>
        </Modal>
      )}
    </div>
  );
}