import {z} from 'zod'

export type GetApiApiV1GitConfigOptions = {baseUrl?: string | undefined, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const releasesDetectionModel = z.object({method: z.enum(["tags", "pr_to_branch", "merge_to_branch", "api", "deployment"]), pattern: z.string().nullable().optional()});

export const draftPullRequestsModel = z.object({labels: z.array(z.string()).optional(), title_pattern: z.string().nullable().optional()});

export const defaultBranchModel = z.object({branch_name: z.string().nullable().optional()});

export const patternsModel = z.object({patterns: z.array(z.string()).optional()});

export const codingTimeStrategyModel = z.object({method: z.enum(["first_commit", "issue_state_pr"])});

export const botPrAttributionModel = z.object({method: z.enum(["merge_actor", "assignee", "none"])});

export const includeFileExtensionsModel = z.object({patterns: z.array(z.string()).optional()});

export const activeBranchesDurationModel = z.object({days: z.number().int().gte(3).lte(14)});

export const issueStartTimeModel = z.object({method: z.enum(["first_transition", "last_transition"])});

export const gitSettingsModel = z.object({releases_detection: releasesDetectionModel, draft_pull_requests: draftPullRequestsModel, default_branch: defaultBranchModel, exclude_branches: patternsModel, exclude_base_branches: patternsModel, exclude_file_extensions: patternsModel, coding_time_strategy: codingTimeStrategyModel, bot_pr_attribution: botPrAttributionModel, include_file_extensions: includeFileExtensionsModel, active_branches_duration: activeBranchesDurationModel, issue_start_time: issueStartTimeModel});

export const gitConfigResponseModel = z.object({settings: gitSettingsModel});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get Git Configuration
 * 
 * GET /api/v1/git/config
 */
export const getApiApiV1GitConfig = async (options?: GetApiApiV1GitConfigOptions) => {
const {baseUrl = "https://public-api.linearb.io", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/git/config${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(gitConfigResponseModel, await res.json())
};