import type { ApiSettings, CampaignListItem } from "../types";
import { apiFetch } from "./client";

export type CampaignListResponse =
  | CampaignListItem[]
  | {
      campaigns?: CampaignListItem[];
      items?: CampaignListItem[];
      results?: CampaignListItem[];
    };


export type CampaignUpdatePayload = {
  external_id?: string | null;
  name?: string | null;
  status?: string | null;
  description?: string | null;
};

export type CampaignCreateMinimalPayload = {
  external_id?: string;
  name?: string;
  description?: string | null;
  current_flow?: string;
  current_step?: string;
};

export type CampaignCreateResponse = {
  campaign: CampaignListItem & {
    current_version_id?: string | null;
  };
  version: CampaignVersionListItem;
};

export type CampaignVersionListItem = {
  id: string;
  campaign_id: string;
  version_number: number;
  schema_version?: string;
  source_filename?: string | null;
  source_base_path?: string | null;
  workflow_state?: string;
  current_flow?: string;
  current_step?: string | null;
  is_complete?: boolean;
  editor_state?: Record<string, unknown>;
  autosaved_at?: string | null;
  published_at?: string | null;
  locked_at?: string | null;
  locked_by_user_id?: string | null;
  created_at?: string;
  updated_at?: string;
  validation_summary?: Record<string, unknown> | null;
  build_summary?: Record<string, unknown> | null;
};

export type CampaignVersionDetail = CampaignVersionListItem & {
  raw_json: Record<string, unknown>;
  campaign_json?: Record<string, unknown>;
};

export type CampaignVersionUpdatePayload = {
  campaign_json?: Record<string, unknown> | null;
  current_flow?: string | null;
  current_step?: string | null;
  workflow_state?: string | null;
  is_complete?: boolean | null;
  editor_state?: Record<string, unknown> | null;
  source_filename?: string | null;
  source_base_path?: string | null;
};

export type CampaignPartialValidationPayload = {
  campaign_json?: Record<string, unknown> | null;
  section?: string | null;
};

export type CampaignPartialValidationResponse = {
  ok: boolean;
  section?: string | null;
  error_count: number;
  warning_count: number;
  info_count: number;
  issues: Record<string, unknown>[];
};

export type CampaignSummary = {
  generated_at?: string;
  campaign?: CampaignListItem;
  current_version?: {
    id: string;
    version_number?: number;
    schema_version?: string;
    source_filename?: string | null;
    created_at?: string | null;
    validation_summary?: Record<string, unknown> | null;
    build_summary?: Record<string, unknown> | null;
  } | null;
  cards?: {
    jobs_total?: number;
    queueable?: number;
    needs_attention?: number;
    sent?: number;
    failed?: number;
    imap_appended?: number;
    imap_failed?: number;
  };
  status_counts?: Record<string, Record<string, number>>;
  issues?: Record<string, unknown>;
  attachments?: Record<string, unknown>;
  attempts?: Record<string, unknown>;
  delivery?: Record<string, unknown>;
  recent_failures?: Record<string, unknown>[];
};

export type CampaignQueuePayload = {
  version_id?: string | null;
  include_warnings?: boolean;
  enqueue_celery?: boolean;
  dry_run?: boolean;
};

export type CampaignSendNowPayload = {
  version_id?: string | null;
  include_warnings?: boolean;
  check_files?: boolean;
  validate_before_send?: boolean;
  build_before_send?: boolean;
  dry_run?: boolean;
  use_rate_limit?: boolean;
  enqueue_imap_task?: boolean;
};


export async function listCampaigns(settings: ApiSettings): Promise<CampaignListItem[]> {
  const response = await apiFetch<CampaignListResponse>(settings, "/api/v1/campaigns");

  if (Array.isArray(response)) {
    return response;
  }

  return response.campaigns ?? response.items ?? response.results ?? [];
}

export async function getCampaign(settings: ApiSettings, campaignId: string): Promise<CampaignListItem> {
  return apiFetch<CampaignListItem>(settings, `/api/v1/campaigns/${campaignId}`);
}

export async function updateCampaignMetadata(
  settings: ApiSettings,
  campaignId: string,
  payload: CampaignUpdatePayload
): Promise<CampaignListItem> {
  return apiFetch<CampaignListItem>(settings, `/api/v1/campaigns/${campaignId}`, {
    method: "PUT",
    body: JSON.stringify(payload)
  });
}

export async function createNewCampaign(
  settings: ApiSettings,
  overrides: CampaignCreateMinimalPayload = {}
): Promise<CampaignCreateResponse> {
  const now = new Date();
  const stamp = now.toISOString().slice(0, 19).replace(/[-:T]/g, "");
  const payload = {
    external_id: overrides.external_id ?? `new-campaign-${stamp}`,
    name: overrides.name ?? "New Campaign",
    description: overrides.description ?? "",
    current_flow: overrides.current_flow ?? "create",
    current_step: overrides.current_step ?? "basics"
  };

  return apiFetch<CampaignCreateResponse>(settings, "/api/v1/campaigns/new", {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function getCampaignSchema(settings: ApiSettings): Promise<unknown> {
  return apiFetch(settings, "/api/v1/schemas/campaign");
}

export async function listCampaignVersions(
  settings: ApiSettings,
  campaignId: string
): Promise<CampaignVersionListItem[]> {
  return apiFetch<CampaignVersionListItem[]>(settings, `/api/v1/campaigns/${campaignId}/versions`);
}

export async function getCampaignVersion(
  settings: ApiSettings,
  campaignId: string,
  versionId: string
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}`);
}

export async function unlockCampaignVersionValidation(
  settings: ApiSettings,
  campaignId: string,
  versionId: string
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/unlock-validation`, {
    method: "POST"
  });
}

export async function updateCampaignVersion(
  settings: ApiSettings,
  campaignId: string,
  versionId: string,
  payload: CampaignVersionUpdatePayload
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}`, {
    method: "PUT",
    body: JSON.stringify(payload)
  });
}

export async function forkCampaignVersion(
  settings: ApiSettings,
  campaignId: string,
  versionId: string,
  payload: CampaignVersionUpdatePayload = {}
): Promise<CampaignCreateResponse> {
  return apiFetch<CampaignCreateResponse>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/fork`, {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function autosaveCampaignVersion(
  settings: ApiSettings,
  campaignId: string,
  versionId: string,
  payload: CampaignVersionUpdatePayload
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/autosave`, {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function setCampaignVersionStep(
  settings: ApiSettings,
  campaignId: string,
  versionId: string,
  currentStep: string,
  currentFlow?: string | null
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/set-step`, {
    method: "POST",
    body: JSON.stringify({ current_flow: currentFlow, current_step: currentStep })
  });
}

export async function validatePartial(
  settings: ApiSettings,
  campaignId: string,
  versionId: string,
  payload: CampaignPartialValidationPayload = {}
): Promise<CampaignPartialValidationResponse> {
  return apiFetch<CampaignPartialValidationResponse>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/validate-partial`, {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function publishCampaignVersion(
  settings: ApiSettings,
  campaignId: string,
  versionId: string
): Promise<CampaignVersionDetail> {
  return apiFetch<CampaignVersionDetail>(settings, `/api/v1/campaigns/${campaignId}/versions/${versionId}/publish`, {
    method: "POST"
  });
}

export async function validateVersion(
  settings: ApiSettings,
  versionId: string,
  checkFiles = false
): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/versions/${versionId}/validate`, {
    method: "POST",
    body: JSON.stringify({ check_files: checkFiles })
  });
}

export async function buildVersion(
  settings: ApiSettings,
  versionId: string,
  writeEml = true
): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/versions/${versionId}/build`, {
    method: "POST",
    body: JSON.stringify({ write_eml: writeEml })
  });
}

export async function getCampaignSummary(settings: ApiSettings, campaignId: string): Promise<CampaignSummary> {
  return apiFetch<CampaignSummary>(settings, `/api/v1/campaigns/${campaignId}/summary`);
}

export async function getCampaignJobs(settings: ApiSettings, campaignId: string): Promise<{ jobs: Record<string, unknown>[] }> {
  return apiFetch<{ jobs: Record<string, unknown>[] }>(settings, `/api/v1/campaigns/${campaignId}/jobs`);
}

export async function queueCampaign(
  settings: ApiSettings,
  campaignId: string,
  payload: CampaignQueuePayload = {}
): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/queue`, {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function sendCampaignNow(
  settings: ApiSettings,
  campaignId: string,
  payload: CampaignSendNowPayload = {}
): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/send-now`, {
    method: "POST",
    body: JSON.stringify(payload)
  });
}

export async function pauseCampaign(settings: ApiSettings, campaignId: string): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/pause`, { method: "POST" });
}

export async function resumeCampaign(settings: ApiSettings, campaignId: string): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/resume`, { method: "POST" });
}

export async function cancelCampaign(settings: ApiSettings, campaignId: string): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/cancel`, { method: "POST" });
}

export async function appendSent(
  settings: ApiSettings,
  campaignId: string,
  dryRun = false
): Promise<Record<string, unknown>> {
  return apiFetch<Record<string, unknown>>(settings, `/api/v1/campaigns/${campaignId}/append-sent`, {
    method: "POST",
    body: JSON.stringify({ dry_run: dryRun })
  });
}