'use client'

import type {
  Environment,
  EnvironmentDeployment,
  EnvVarInput,
  Release,
} from '@dify/contracts/enterprise/types.gen'
import type { Getter } from 'jotai'
import type {
  EnvVarBindingSlot,
  EnvVarValues,
  EnvVarValueSelection,
} from '../../shared/components/env-var-bindings'
import type { RuntimeCredentialBindingSelections } from '../../shared/components/runtime-credential-bindings-utils'
import { EnvVarValueSource as ApiEnvVarValueSource } from '@dify/contracts/enterprise/types.gen'
import { toast } from '@langgenius/dify-ui/toast'
import { skipToken } from '@tanstack/react-query'
import { atom } from 'jotai'
import { atomWithMutation, atomWithQuery } from 'jotai-tanstack-query'
import { selectAtom } from 'jotai/utils'
import { consoleQuery } from '@/service/client'
import { envVarBindingSlotFromContract } from '../../shared/components/env-var-bindings-utils'
import {
  hasMissingRequiredRuntimeCredentialBinding,
  runtimeCredentialSlotKey,
  selectedDeploymentRuntimeCredentials,
  selectedRuntimeCredentialSelections,
} from '../../shared/components/runtime-credential-bindings-utils'
import { createDeploymentIdempotencyKey } from '../../shared/domain/idempotency'
import { releaseDeploymentAction } from '../../shared/domain/release-action'

type OpenDeployDrawerParams = {
  appInstanceId: string
  environmentId?: string
  releaseId?: string
}

export const deployDrawerOpenAtom = atom(false)
export const deployDrawerAppInstanceIdAtom = atom<string | undefined>(undefined)
export const deployDrawerEnvironmentIdAtom = atom<string | undefined>(undefined)
export const deployDrawerReleaseIdAtom = atom<string | undefined>(undefined)
export const deployFormAppInstanceIdAtom = atom<string | undefined>(undefined)

export const openDeployDrawerAtom = atom(null, (_get, set, params: OpenDeployDrawerParams) => {
  set(deployDrawerAppInstanceIdAtom, params.appInstanceId)
  set(deployDrawerEnvironmentIdAtom, params.environmentId)
  set(deployDrawerReleaseIdAtom, params.releaseId)
  set(deployDrawerOpenAtom, true)
})

export const closeDeployDrawerAtom = atom(null, (_get, set) => {
  set(deployDrawerOpenAtom, false)
  set(deployDrawerAppInstanceIdAtom, undefined)
  set(deployDrawerEnvironmentIdAtom, undefined)
  set(deployDrawerReleaseIdAtom, undefined)
})

export type DeployReadyFormConfig = {
  appInstanceId: string
  environments: Environment[]
  releases: Release[]
  runtimeRows: EnvironmentDeployment[]
  defaultReleaseId?: string
  lockedEnvId?: string
  presetReleaseId?: string
  releaseEmptyLabel?: string
}

export const deployReadyFormConfigAtom = atom<DeployReadyFormConfig | undefined>(undefined)

export const releaseDeploymentViewQueryAtom = atomWithQuery((get) => {
  const appInstanceId = get(deployFormAppInstanceIdAtom)

  return consoleQuery.enterprise.releaseService.computeReleaseDeploymentView.queryOptions({
    input: appInstanceId
      ? {
          params: { appInstanceId },
        }
      : skipToken,
    enabled: Boolean(appInstanceId),
  })
})

export const releaseDeploymentViewAtom = selectAtom(
  releaseDeploymentViewQueryAtom,
  (query) => query.data,
)
export const releaseDeploymentViewIsLoadingAtom = selectAtom(
  releaseDeploymentViewQueryAtom,
  (query) => query.isLoading,
)
export const releaseDeploymentViewIsErrorAtom = selectAtom(
  releaseDeploymentViewQueryAtom,
  (query) => query.isError,
)

const selectedEnvIdAtom = atom<string | undefined>(undefined)
const selectedReleaseIdAtom = atom<string | undefined>(undefined)
const manualBindingsAtom = atom<RuntimeCredentialBindingSelections>({})
export const deployEnvVarValuesAtom = atom<EnvVarValues>({})
const showValidationErrorsAtom = atom(false)
export const deployReadyFormLocalAtoms = [
  selectedEnvIdAtom,
  selectedReleaseIdAtom,
  manualBindingsAtom,
  deployEnvVarValuesAtom,
  showValidationErrorsAtom,
] as const

function formConfig(get: Getter) {
  const config = get(deployReadyFormConfigAtom)
  if (!config) throw new Error('Missing deploy ready form config.')

  return config
}

const resetDeployBindingsAtom = atom(null, (_get, set) => {
  set(manualBindingsAtom, {})
  set(deployEnvVarValuesAtom, {})
  set(showValidationErrorsAtom, false)
})

export const selectDeployEnvironmentAtom = atom(null, (_get, set, environmentId: string) => {
  set(selectedEnvIdAtom, environmentId)
  set(resetDeployBindingsAtom)
})

export const selectDeployReleaseAtom = atom(null, (_get, set, releaseId: string) => {
  set(selectedReleaseIdAtom, releaseId)
  set(resetDeployBindingsAtom)
})

export const showDeployValidationErrorsAtom = atom(null, (_get, set) => {
  set(showValidationErrorsAtom, true)
})

export const deployShowValidationErrorsAtom = atom((get) => {
  return get(showValidationErrorsAtom)
})

const deployPresetReleaseAtom = atom((get) => {
  const config = formConfig(get)
  return config.presetReleaseId
    ? config.releases.find((r) => r.id === config.presetReleaseId)
    : undefined
})

export const deployDisplayedReleaseAtom = atom((get): Release | undefined => {
  return get(deployPresetReleaseAtom)
})

export const deployIsExistingReleaseAtom = atom((get) => {
  const config = formConfig(get)
  return Boolean(config.presetReleaseId)
})

export const deployReleaseRowsAtom = atom((get) => {
  return formConfig(get).releases
})

export const deployReleaseEmptyLabelAtom = atom((get) => {
  return formConfig(get).releaseEmptyLabel
})

export const deployEnvironmentRowsAtom = atom((get) => {
  return formConfig(get).environments
})

export const deployLockedEnvironmentIdAtom = atom((get) => {
  return formConfig(get).lockedEnvId
})

export const deploySelectedEnvironmentIdAtom = atom((get) => {
  const config = formConfig(get)
  return get(selectedEnvIdAtom) ?? config.lockedEnvId ?? config.environments[0]?.id
})

const deploySelectedEnvironmentAtom = atom((get) => {
  const config = formConfig(get)
  const selectedEnvironmentId = get(deploySelectedEnvironmentIdAtom)
  return selectedEnvironmentId
    ? config.environments.find((env) => env.id === selectedEnvironmentId)
    : undefined
})

export const deploySelectedReleaseIdAtom = atom((get) => {
  const config = formConfig(get)
  const displayedRelease = get(deployDisplayedReleaseAtom)
  return get(selectedReleaseIdAtom) ?? displayedRelease?.id ?? config.defaultReleaseId
})

const deploySelectedReleaseAtom = atom((get) => {
  const config = formConfig(get)
  const selectedReleaseId = get(deploySelectedReleaseIdAtom)
  return selectedReleaseId
    ? config.releases.find((release) => release.id === selectedReleaseId)
    : undefined
})

const deployTargetReleaseAtom = atom((get) => {
  return get(deployDisplayedReleaseAtom) ?? get(deploySelectedReleaseAtom)
})

export const deployLockedEnvironmentAtom = atom((get) => {
  const config = formConfig(get)
  return config.lockedEnvId
    ? config.environments.find((environment) => environment.id === config.lockedEnvId)
    : undefined
})

export const deployTargetReleaseIdAtom = atom((get) => {
  const targetRelease = get(deployTargetReleaseAtom)
  return targetRelease?.id ?? get(deploySelectedReleaseIdAtom)
})

export const deployHasSelectedEnvironmentAtom = atom((get) => {
  return Boolean(get(deploySelectedEnvironmentAtom))
})

const releaseDeploymentOptionsQueryAtom = atomWithQuery((get) => {
  const hasSelectedEnvironment = get(deployHasSelectedEnvironmentAtom)
  const releaseId = get(deployTargetReleaseIdAtom)
  const selectedEnvironmentId = get(deploySelectedEnvironmentIdAtom)
  const hasRequiredInput = Boolean(releaseId && selectedEnvironmentId)

  return consoleQuery.enterprise.releaseService.computeDeploymentOptions.queryOptions({
    input:
      releaseId && selectedEnvironmentId
        ? {
            body: {
              releaseId,
              environmentId: selectedEnvironmentId,
            },
          }
        : skipToken,
    enabled: hasRequiredInput && hasSelectedEnvironment,
    retry: false,
  })
})

const releaseDeploymentOptionsAtom = selectAtom(
  releaseDeploymentOptionsQueryAtom,
  (query) => query.data,
)
const releaseDeploymentOptionsIsLoadingAtom = selectAtom(
  releaseDeploymentOptionsQueryAtom,
  (query) => query.isLoading,
)
const releaseDeploymentOptionsIsFetchingAtom = selectAtom(
  releaseDeploymentOptionsQueryAtom,
  (query) => query.isFetching,
)
const releaseDeploymentOptionsIsErrorAtom = selectAtom(
  releaseDeploymentOptionsQueryAtom,
  (query) => query.isError,
)

export const deployBindingSlotsAtom = atom((get) => {
  const deploymentOptions = get(releaseDeploymentOptionsAtom)

  return (
    deploymentOptions?.options.credentialSlots.filter((slot) => runtimeCredentialSlotKey(slot)) ??
    []
  )
})

export const deployEnvVarSlotsAtom = atom((get): EnvVarBindingSlot[] => {
  const deploymentOptions = get(releaseDeploymentOptionsAtom)

  return (
    deploymentOptions?.options.envVarSlots.flatMap((slot): EnvVarBindingSlot[] => {
      const bindingSlot = envVarBindingSlotFromContract(slot)
      return bindingSlot ? [bindingSlot] : []
    }) ?? []
  )
})

export const deployIsBindingOptionsLoadingAtom = atom((get) => {
  const releaseId = get(deployTargetReleaseIdAtom)

  return Boolean(
    releaseId &&
    get(deployHasSelectedEnvironmentAtom) &&
    (get(releaseDeploymentOptionsIsLoadingAtom) || get(releaseDeploymentOptionsIsFetchingAtom)),
  )
})

export const deployHasBindingOptionsErrorAtom = atom((get) => {
  return get(releaseDeploymentOptionsIsErrorAtom)
})

const deployIsBindingOptionsReadyAtom = atom((get) => {
  const releaseId = get(deployTargetReleaseIdAtom)

  return Boolean(
    releaseId &&
    get(deployHasSelectedEnvironmentAtom) &&
    get(releaseDeploymentOptionsAtom) &&
    !get(deployIsBindingOptionsLoadingAtom) &&
    !get(deployHasBindingOptionsErrorAtom),
  )
})

function deployEnvVarValueSource(
  slot: EnvVarBindingSlot,
  selection: EnvVarValueSelection | undefined,
) {
  return (
    selection?.valueSource ??
    (slot.hasLastValue
      ? ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_LAST_DEPLOYMENT
      : slot.hasDefaultValue
        ? ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_DSL_DEFAULT
        : ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_LITERAL)
  )
}

function deployEnvVarInput(
  slot: EnvVarBindingSlot,
  selection: EnvVarValueSelection | undefined,
): EnvVarInput[] {
  const valueSource = deployEnvVarValueSource(slot, selection)

  if (valueSource === ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_LAST_DEPLOYMENT) {
    return slot.hasLastValue ? [{ key: slot.key, valueSource }] : []
  }

  if (valueSource === ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_DSL_DEFAULT) {
    return slot.hasDefaultValue ? [{ key: slot.key, valueSource }] : []
  }

  if (!selection?.value || (slot.valueType === 'number' && Number.isNaN(Number(selection.value))))
    return []

  return [
    {
      key: slot.key,
      value: selection.value,
      valueSource,
    },
  ]
}

function deployEnvVarSelectionReady(
  slot: EnvVarBindingSlot,
  selection: EnvVarValueSelection | undefined,
) {
  const valueSource = deployEnvVarValueSource(slot, selection)

  if (valueSource === ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_LAST_DEPLOYMENT)
    return Boolean(slot.hasLastValue)
  if (valueSource === ApiEnvVarValueSource.ENV_VAR_VALUE_SOURCE_DSL_DEFAULT)
    return Boolean(slot.hasDefaultValue)
  if (!selection?.value) return false

  return slot.valueType !== 'number' || !Number.isNaN(Number(selection.value))
}

export const deploySelectedBindingsAtom = atom((get) => {
  return selectedRuntimeCredentialSelections(get(deployBindingSlotsAtom), get(manualBindingsAtom))
})

const deployDeploymentCredentialsAtom = atom((get) => {
  return selectedDeploymentRuntimeCredentials(
    get(deployBindingSlotsAtom),
    get(deploySelectedBindingsAtom),
  )
})

const deployDeploymentEnvVarsAtom = atom((get) => {
  const envVarValues = get(deployEnvVarValuesAtom)

  return get(deployEnvVarSlotsAtom).flatMap((slot) =>
    deployEnvVarInput(slot, envVarValues[slot.key]),
  )
})

const deployRequiredBindingsReadyAtom = atom((get) => {
  const selectedBindings = get(deploySelectedBindingsAtom)

  return get(deployBindingSlotsAtom).every(
    (slot) =>
      !hasMissingRequiredRuntimeCredentialBinding(
        slot,
        selectedBindings[runtimeCredentialSlotKey(slot)],
      ),
  )
})

const deployRequiredEnvVarsReadyAtom = atom((get) => {
  const envVarValues = get(deployEnvVarValuesAtom)

  return get(deployEnvVarSlotsAtom).every((slot) =>
    deployEnvVarSelectionReady(slot, envVarValues[slot.key]),
  )
})

export const selectDeployBindingAtom = atom(null, (get, set, slot: string, value: string) => {
  set(manualBindingsAtom, {
    ...get(manualBindingsAtom),
    [slot]: value,
  })
})

export const setDeployEnvVarAtom = atom(
  null,
  (get, set, key: string, value: EnvVarValueSelection) => {
    set(deployEnvVarValuesAtom, {
      ...get(deployEnvVarValuesAtom),
      [key]: value,
    })
  },
)

const promoteReleaseMutationAtom = atomWithMutation(() =>
  consoleQuery.enterprise.deploymentService.promote.mutationOptions(),
)

const rollbackReleaseMutationAtom = atomWithMutation(() =>
  consoleQuery.enterprise.deploymentService.rollback.mutationOptions(),
)

export const isDeployReleaseSubmittingAtom = atom((get) => {
  return get(promoteReleaseMutationAtom).isPending || get(rollbackReleaseMutationAtom).isPending
})

export const canAttemptDeployAtom = atom((get) => {
  return Boolean(
    get(deploySelectedEnvironmentIdAtom) &&
    get(deploySelectedEnvironmentAtom) &&
    get(deployTargetReleaseIdAtom) &&
    get(deployIsBindingOptionsReadyAtom) &&
    !get(isDeployReleaseSubmittingAtom),
  )
})

export const canSubmitDeployAtom = atom((get) => {
  return Boolean(
    get(canAttemptDeployAtom) &&
    get(deployRequiredBindingsReadyAtom) &&
    get(deployRequiredEnvVarsReadyAtom),
  )
})

export const deployReleaseSubmissionAtom = atom(
  null,
  (
    get,
    set,
    {
      deployFailedMessage,
    }: {
      deployFailedMessage: string
    },
  ) => {
    const config = formConfig(get)
    const selectedEnvironmentId = get(deploySelectedEnvironmentIdAtom)
    const targetRelease = get(deployTargetReleaseAtom)
    const targetReleaseId = get(deployTargetReleaseIdAtom)

    if (!targetReleaseId || !selectedEnvironmentId) return

    const idempotencyKey = createDeploymentIdempotencyKey()
    const currentRelease = config.runtimeRows.find(
      (row) => row.environment.id === selectedEnvironmentId,
    )?.currentRelease
    const action = releaseDeploymentAction({
      targetRelease,
      currentRelease,
      releaseRows: config.releases,
      isExistingRelease: true,
    })
    const mutationOptions = {
      onSuccess: () => {
        set(closeDeployDrawerAtom)
      },
      onError: () => {
        toast.error(deployFailedMessage)
      },
    }

    if (action === 'rollback') {
      get(rollbackReleaseMutationAtom).mutate(
        {
          params: {
            appInstanceId: config.appInstanceId,
            environmentId: selectedEnvironmentId,
          },
          body: {
            appInstanceId: config.appInstanceId,
            environmentId: selectedEnvironmentId,
            targetReleaseId,
            idempotencyKey,
          },
        },
        mutationOptions,
      )
      return
    }

    const deploymentEnvVars = get(deployDeploymentEnvVarsAtom)
    get(promoteReleaseMutationAtom).mutate(
      {
        params: {
          appInstanceId: config.appInstanceId,
          environmentId: selectedEnvironmentId,
        },
        body: {
          appInstanceId: config.appInstanceId,
          environmentId: selectedEnvironmentId,
          releaseId: targetReleaseId,
          credentials: get(deployDeploymentCredentialsAtom),
          envVars: deploymentEnvVars.length > 0 ? deploymentEnvVars : undefined,
          idempotencyKey,
        },
      },
      mutationOptions,
    )
  },
)