import { useParams } from 'common'
import { map as lodashMap, uniqBy } from 'lodash'
import { HelpCircle, Terminal } from 'lucide-react'
import Link from 'next/link'
import { useRouter } from 'next/router'
import { Accordion, AccordionContent, AccordionItem, AccordionTrigger, Button, SidePanel } from 'ui'

import ProductEmptyState from '@/components/to-be-cleaned/ProductEmptyState'
import InformationBox from '@/components/ui/InformationBox'
import SqlEditor from '@/components/ui/SqlEditor'
import {
  useDatabaseFunctionsQuery,
  type DatabaseFunction,
} from '@/data/database-functions/database-functions-query'
import { useSelectedProjectQuery } from '@/hooks/misc/useSelectedProject'

export interface ChooseFunctionFormProps {
  visible: boolean
  setVisible: (value: boolean) => void
  onChange: (fn: DatabaseFunction) => void
}

const ChooseFunctionForm = ({ visible, onChange, setVisible }: ChooseFunctionFormProps) => {
  const { data: project } = useSelectedProjectQuery()

  const { data = [] } = useDatabaseFunctionsQuery({
    projectRef: project?.ref,
    connectionString: project?.connectionString,
  })
  const triggerFunctions = data.filter((fn) => fn.return_type === 'trigger')
  const hasPublicSchemaFunctions = triggerFunctions.length >= 1
  const functionSchemas = lodashMap(uniqBy(triggerFunctions, 'schema'), 'schema')

  const selectFunction = (id: number) => {
    const fn = triggerFunctions.find((x) => x.id === id)
    if (!!fn) onChange(fn)
    setVisible(!visible)
  }

  return (
    <SidePanel
      size="large"
      header="Pick a function"
      visible={visible}
      onCancel={() => setVisible(!visible)}
      className="hooks-sidepanel"
    >
      <div className="py-6">
        {hasPublicSchemaFunctions ? (
          <div className="space-y-6">
            <NoticeBox />
            {functionSchemas.map((schema: string) => (
              <SchemaFunctionGroup
                key={schema}
                schema={schema}
                functions={triggerFunctions.filter((x) => x.schema == schema)}
                selectFunction={selectFunction}
              />
            ))}
          </div>
        ) : (
          <NoFunctionsState />
        )}
      </div>
    </SidePanel>
  )
}

export default ChooseFunctionForm

const NoticeBox = () => {
  const { ref } = useParams()

  return (
    <div className="px-6">
      <InformationBox
        icon={<HelpCircle size="20" strokeWidth={1.5} />}
        title="Only functions that return a trigger will be displayed below"
        description={`You can make functions by using the Database Functions`}
        button={
          <Button asChild type="default">
            <Link href={`/project/${ref}/database/functions`}>Go to Functions</Link>
          </Button>
        }
      />
    </div>
  )
}

const NoFunctionsState = () => {
  // for the empty 'no tables' state link
  const router = useRouter()
  const { ref } = router.query

  return (
    <ProductEmptyState
      title="No Trigger Functions found in database"
      ctaButtonLabel="Create a trigger function"
      onClickCta={() => {
        router.push(`/project/${ref}/database/functions`)
      }}
    >
      <p className="text-sm text-foreground-light">
        You will need to create a trigger based function before you can add it to your trigger.
      </p>
    </ProductEmptyState>
  )
}

export interface SchemaFunctionGroupProps {
  schema: string
  functions: DatabaseFunction[]
  selectFunction: (id: number) => void
}

const SchemaFunctionGroup = ({ schema, functions, selectFunction }: SchemaFunctionGroupProps) => {
  return (
    <div className="space-y-4">
      <div className="sticky top-0 flex items-center space-x-1 px-6 backdrop-blur-sm backdrop-filter">
        <h5 className="text-foreground-light">schema</h5>
        <h5>{schema}</h5>
      </div>
      <div className="space-y-0 divide-y border-t border-b border-default">
        {functions.map((x) => (
          <Function
            id={x.id}
            key={x.id}
            completeStatement={x.complete_statement}
            name={x.name}
            onClick={selectFunction}
          />
        ))}
      </div>
    </div>
  )
}

export interface FunctionProps {
  id: number
  completeStatement: string
  name: string
  onClick: (id: number) => void
}

const Function = ({ id, completeStatement, name, onClick }: FunctionProps) => {
  return (
    <div className="cursor-pointer rounded-sm p-3 px-6 hover:bg-studio" onClick={() => onClick(id)}>
      <Accordion type="single" collapsible>
        <AccordionItem value="definition" className="border-none">
          <div className="flex items-center justify-between space-x-3">
            <div className="flex items-center space-x-3">
              <div className="flex items-center justify-center rounded-sm bg-foreground p-1 text-background">
                <Terminal strokeWidth={2} size={14} />
              </div>
              <p className="mb-0 text-sm">{name}</p>
            </div>
            <AccordionTrigger
              onClick={(e) => e.stopPropagation()}
              className="py-0 text-xs font-normal text-foreground-light hover:no-underline"
            >
              View definition
            </AccordionTrigger>
          </div>
          <AccordionContent className="[&>div]:pb-0" onClick={(e) => e.stopPropagation()}>
            <div className="mt-4 h-64 border border-default">
              <SqlEditor defaultValue={completeStatement} readOnly={true} contextmenu={false} />
            </div>
          </AccordionContent>
        </AccordionItem>
      </Accordion>
    </div>
  )
}