import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
import {
  issueAssigneeList,
  issueAssigneeAdd,
  issueAssigneeRemove,
  issueClose,
  issueDelete as apiIssueDelete,
  issueReopen,
  issueUpdate,
  issueLabelList,
  issueLabelAdd,
  issueLabelAddBulk,
  issueLabelRemove,
  issuePullRequestList,
  issuePullRequestLink,
  issuePullRequestUnlink,
  issueReactionList,
  issueRepoList,
  issueRepoLink,
  issueRepoUnlink,
  issueSubscriberList,
  issueSubscribe,
  issueUnsubscribe,
  projectLabels,
  labelCreate,
  labelList as apiLabelList,
  labelDelete as apiLabelDelete,
} from "@/client/api";
import type {
  IssueAssigneeResponse,
  IssueLabelResponse,
  IssuePullRequestResponse,
  IssueRepoResponse,
  IssueSubscriberResponse,
  ReactionListResponse,
  LabelResponse,
  CreateLabelRequest,
  IssueUpdateRequest,
} from "@/client/model";

const ISSUE_QUERY_KEY = "issue";

interface IssueParams {
  projectName: string;
  issueNumber: number;
}

// Assignees
export function useIssueAssigneesQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "assignees"],
    queryFn: async (): Promise<IssueAssigneeResponse[]> => {
      const res = await issueAssigneeList(projectName, issueNumber);
      return res.data.data ?? [];
    },
    enabled: !!projectName && !!issueNumber,
  });
}

export function useAddAssigneeMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, userId }: IssueParams & { userId: string }) => {
      await issueAssigneeAdd(projectName, issueNumber, { user_id: userId });
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "assignees"] });
    },
  });
}

export function useRemoveAssigneeMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, userId }: IssueParams & { userId: string }) => {
      await issueAssigneeRemove(projectName, issueNumber, userId);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "assignees"] });
    },
  });
}

// Labels
export function useIssueLabelsQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "labels"],
    queryFn: async (): Promise<IssueLabelResponse[]> => {
      const res = await issueLabelList(projectName, issueNumber);
      return res.data.data ?? [];
    },
    enabled: !!projectName && !!issueNumber,
  });
}

export function useAddIssueLabelMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, labelId }: IssueParams & { labelId: number }) => {
      await issueLabelAdd(projectName, issueNumber, { label_id: labelId });
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "labels"] });
    },
  });
}

export function useRemoveIssueLabelMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, labelId }: IssueParams & { labelId: number }) => {
      await issueLabelRemove(projectName, issueNumber, labelId);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "labels"] });
    },
  });
}

// Project Labels
export function useProjectLabelsQuery(projectName: string) {
  return useQuery({
    queryKey: ["project", projectName, "labels"],
    queryFn: async (): Promise<LabelResponse[]> => {
      const res = await projectLabels(projectName);
      return res.data.data?.labels ?? [];
    },
    enabled: !!projectName,
  });
}

export function useCreateLabelMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, req }: { projectName: string, req: CreateLabelRequest }) => {
      await labelCreate(projectName, req);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: ["project", variables.projectName, "labels"] });
    },
  });
}

// Reactions
export function useIssueReactionsQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "reactions"],
    queryFn: async (): Promise<ReactionListResponse | null> => {
      const res = await issueReactionList(projectName, issueNumber);
      return res.data.data ?? null;
    },
    enabled: !!projectName && !!issueNumber,
  });
}

// Subscribers
export function useIssueSubscribersQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "subscribers"],
    queryFn: async (): Promise<IssueSubscriberResponse[]> => {
      const res = await issueSubscriberList(projectName, issueNumber);
      return res.data.data ?? [];
    },
    enabled: !!projectName && !!issueNumber,
  });
}

export function useIssueSubscribeMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber }: IssueParams) => {
      await issueSubscribe(projectName, issueNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "subscribers"] });
    },
  });
}

// PRs & Repos
export function useIssuePRsQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "prs"],
    queryFn: async (): Promise<IssuePullRequestResponse[]> => {
      const res = await issuePullRequestList(projectName, issueNumber);
      return res.data.data ?? [];
    },
    enabled: !!projectName && !!issueNumber,
  });
}

export function useIssueReposQuery({ projectName, issueNumber }: IssueParams) {
  return useQuery({
    queryKey: [ISSUE_QUERY_KEY, projectName, issueNumber, "repos"],
    queryFn: async (): Promise<IssueRepoResponse[]> => {
      const res = await issueRepoList(projectName, issueNumber);
      return res.data.data ?? [];
    },
    enabled: !!projectName && !!issueNumber,
  });
}

// Close/Reopen/Update/Delete
export function useCloseIssueMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber }: IssueParams) => {
      await issueClose(projectName, issueNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber] });
    },
  });
}

export function useReopenIssueMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber }: IssueParams) => {
      await issueReopen(projectName, issueNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber] });
    },
  });
}

export function useUpdateIssueMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, req }: IssueParams & { req: IssueUpdateRequest }) => {
      await issueUpdate(projectName, issueNumber, req);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber] });
    },
  });
}

export function useDeleteIssueMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber }: IssueParams) => {
      await apiIssueDelete(projectName, issueNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber] });
    },
  });
}

// Bulk Label Add
export function useAddIssueLabelsBulkMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, labelNames }: IssueParams & { labelNames: string[] }) => {
      await issueLabelAddBulk(projectName, issueNumber, { names: labelNames });
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "labels"] });
    },
  });
}

// PR Link/Unlink
export function useLinkPRMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, repo, prNumber }: IssueParams & { repo: string; prNumber: number }) => {
      await issuePullRequestLink(projectName, issueNumber, { repo, number: prNumber });
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "prs"] });
    },
  });
}

export function useUnlinkPRMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, repo, prNumber }: IssueParams & { repo: string; prNumber: number }) => {
      await issuePullRequestUnlink(projectName, issueNumber, repo, prNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "prs"] });
    },
  });
}

// Repo Link/Unlink
export function useLinkRepoMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, repo }: IssueParams & { repo: string }) => {
      await issueRepoLink(projectName, issueNumber, { repo });
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "repos"] });
    },
  });
}

export function useUnlinkRepoMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber, repoId }: IssueParams & { repoId: string }) => {
      await issueRepoUnlink(projectName, issueNumber, repoId);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "repos"] });
    },
  });
}

// Unsubscribe
export function useIssueUnsubscribeMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, issueNumber }: IssueParams) => {
      await issueUnsubscribe(projectName, issueNumber);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: [ISSUE_QUERY_KEY, variables.projectName, variables.issueNumber, "subscribers"] });
    },
  });
}

// Label List/Delete (project level)
export function useLabelsQuery(projectName: string) {
  return useQuery({
    queryKey: ["project", projectName, "labels"],
    queryFn: async () => {
      const res = await apiLabelList(projectName);
      return res.data.data ?? [];
    },
    enabled: !!projectName,
  });
}

export function useDeleteLabelMutation() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: async ({ projectName, labelId }: { projectName: string; labelId: number }) => {
      await apiLabelDelete(projectName, labelId);
    },
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: ["project", variables.projectName, "labels"] });
    },
  });
}