export type DepthPreset = "shallow" | "standard" | "deep" | "deeper" | "exhaustive";

export interface DepthProfile {
  readonly depthRounds: number;
  readonly pageBudgetPerWorker: number;
  readonly pageBudgetPerGapWorker: number;
  readonly defaultContentLimit: number;
  readonly searchResultsPerQuery: number;
  readonly maxQueriesPerWorker: number;
  readonly maxPagesPerDomain: number;
  readonly maxLinksToEvaluate: number;
  readonly maxLinksToFollow: number;
  readonly maxOutlinksPerPage: number;
  readonly candidatePoolMultiplier: number;
  readonly workerConcurrency: number;
  readonly maxDecompositionWorkers: number;
  readonly maxGapFillQueries: number;
  readonly ddgRateLimitMs: number;
  readonly minRelevanceScore: number;
  readonly synthesisMaxSources: number;
  readonly synthesisSourceChars: number;
  readonly synthesisMaxTokens: number;
  readonly contradictionMaxSources: number;
  readonly stagnationThreshold: number;
  readonly searchPages: number;
  readonly searchLanes: number;
  readonly workerFanOut: number;
  readonly extraEngines: ReadonlyArray<string>;
  readonly linkCrawlDepth: number;
  readonly queryMutationThreshold: number;
}

export const DEPTH_PROFILES: Readonly<Record<DepthPreset, DepthProfile>> = {
  shallow: {
    depthRounds: 1, pageBudgetPerWorker: 5, pageBudgetPerGapWorker: 4, defaultContentLimit: 5_000,
    searchResultsPerQuery: 8, maxQueriesPerWorker: 3, maxPagesPerDomain: 3, maxLinksToEvaluate: 20,
    maxLinksToFollow: 2, maxOutlinksPerPage: 20, candidatePoolMultiplier: 2, workerConcurrency: 3,
    maxDecompositionWorkers: 6, maxGapFillQueries: 4, ddgRateLimitMs: 2_200, minRelevanceScore: 0.15,
    synthesisMaxSources: 15, synthesisSourceChars: 500, synthesisMaxTokens: 3_000, contradictionMaxSources: 10,
    stagnationThreshold: 1, searchPages: 1, searchLanes: 2, workerFanOut: 1,
    extraEngines: ["brave", "mojeek", "yandex"], linkCrawlDepth: 1, queryMutationThreshold: 2,
  },
  standard: {
    depthRounds: 3, pageBudgetPerWorker: 8, pageBudgetPerGapWorker: 6, defaultContentLimit: 6_000,
    searchResultsPerQuery: 10, maxQueriesPerWorker: 4, maxPagesPerDomain: 4, maxLinksToEvaluate: 30,
    maxLinksToFollow: 4, maxOutlinksPerPage: 30, candidatePoolMultiplier: 2, workerConcurrency: 3,
    maxDecompositionWorkers: 8, maxGapFillQueries: 5, ddgRateLimitMs: 2_000, minRelevanceScore: 0.13,
    synthesisMaxSources: 20, synthesisSourceChars: 500, synthesisMaxTokens: 4_000, contradictionMaxSources: 15,
    stagnationThreshold: 1, searchPages: 1, searchLanes: 2, workerFanOut: 1,
    extraEngines: ["brave", "mojeek", "searxng", "yandex"], linkCrawlDepth: 1, queryMutationThreshold: 2,
  },
  deep: {
    depthRounds: 5, pageBudgetPerWorker: 10, pageBudgetPerGapWorker: 8, defaultContentLimit: 8_000,
    searchResultsPerQuery: 12, maxQueriesPerWorker: 5, maxPagesPerDomain: 5, maxLinksToEvaluate: 40,
    maxLinksToFollow: 6, maxOutlinksPerPage: 40, candidatePoolMultiplier: 3, workerConcurrency: 4,
    maxDecompositionWorkers: 10, maxGapFillQueries: 6, ddgRateLimitMs: 1_800, minRelevanceScore: 0.1,
    synthesisMaxSources: 30, synthesisSourceChars: 400, synthesisMaxTokens: 5_000, contradictionMaxSources: 20,
    stagnationThreshold: 2, searchPages: 2, searchLanes: 3, workerFanOut: 2,
    extraEngines: ["brave", "mojeek", "searxng", "yandex"], linkCrawlDepth: 2, queryMutationThreshold: 3,
  },
  deeper: {
    depthRounds: 8, pageBudgetPerWorker: 15, pageBudgetPerGapWorker: 12, defaultContentLimit: 10_000,
    searchResultsPerQuery: 15, maxQueriesPerWorker: 6, maxPagesPerDomain: 6, maxLinksToEvaluate: 50,
    maxLinksToFollow: 8, maxOutlinksPerPage: 50, candidatePoolMultiplier: 3, workerConcurrency: 4,
    maxDecompositionWorkers: 12, maxGapFillQueries: 8, ddgRateLimitMs: 1_500, minRelevanceScore: 0.08,
    synthesisMaxSources: 40, synthesisSourceChars: 400, synthesisMaxTokens: 6_000, contradictionMaxSources: 25,
    stagnationThreshold: 2, searchPages: 2, searchLanes: 3, workerFanOut: 2,
    extraEngines: ["brave", "mojeek", "scholar", "searxng", "yandex"], linkCrawlDepth: 2, queryMutationThreshold: 3,
  },
  exhaustive: {
    depthRounds: 12, pageBudgetPerWorker: 20, pageBudgetPerGapWorker: 15, defaultContentLimit: 12_000,
    searchResultsPerQuery: 18, maxQueriesPerWorker: 8, maxPagesPerDomain: 8, maxLinksToEvaluate: 60,
    maxLinksToFollow: 10, maxOutlinksPerPage: 60, candidatePoolMultiplier: 4, workerConcurrency: 5,
    maxDecompositionWorkers: 14, maxGapFillQueries: 10, ddgRateLimitMs: 1_200, minRelevanceScore: 0.06,
    synthesisMaxSources: 50, synthesisSourceChars: 300, synthesisMaxTokens: 8_000, contradictionMaxSources: 30,
    stagnationThreshold: 3, searchPages: 3, searchLanes: 4, workerFanOut: 3,
    extraEngines: ["brave", "scholar", "searxng", "mojeek", "yandex"], linkCrawlDepth: 3, queryMutationThreshold: 4,
  },
};

export function getDepthProfile(preset: DepthPreset): DepthProfile {
  return DEPTH_PROFILES[preset];
}

export const DDG_RATE_LIMIT_MS = 2_000;
export const FETCH_TIMEOUT_MS = 10_000;
export const IMAGE_FETCH_TIMEOUT_MS = 8_000;
export const FETCH_MAX_RETRIES = 4;
export const FETCH_RETRY_DELAY_MS = 1500;
export const BATCH_INTER_FETCH_DELAY_MS = 300;
export const CACHE_FALLBACK_TIMEOUT_MS = 10_000;
export const WORKER_CONCURRENCY = 3;
export const MAX_PAGES_PER_DOMAIN = 3;
export const MIN_USEFUL_WORD_COUNT = 50;
export const MAX_LINKS_TO_EVALUATE = 40;
export const MAX_LINKS_TO_FOLLOW = 4;
export const MIN_RELEVANCE_SCORE = 0.15;
export const RELEVANCE_KEYWORD_FRACTION = 0.25;
export const RELEVANCE_TITLE_BONUS = 0.15;
export const RELEVANCE_SNIPPET_BONUS = 0.08;
export const FINGERPRINT_HEAD_WORDS = 30;
export const FINGERPRINT_MID_WORDS = 20;
export const FINGERPRINT_TAIL_WORDS = 20;
export const SCORE_WEIGHT_DOMAIN = 0.55;
export const SCORE_WEIGHT_URL_QUALITY = 0.25;
export const SCORE_WEIGHT_FRESHNESS = 0.2;
export const MIN_CANDIDATE_SCORE = 12;
export const MIN_URL_QUALITY = 8;
export const LINK_KEYWORD_BONUS = 20;
export const MAX_SENTENCE_CHARS = 600;
export const IDEAL_SENTENCE_LENGTH = 150;
export const CONSENSUS_OVERLAP_FRACTION = 0.4;
export const MAX_CONSENSUS_PHRASES = 10;
export const KEY_SENTENCES_PER_SOURCE = 3;
export const MAX_SOURCES_PER_DIMENSION = 5;
export const REPORT_SOURCE_PREVIEW_CHARS = 700;
export const MULTI_READ_BATCH_DELAY_MS = 500;
export const DIMENSION_COVERAGE_MIN_HITS = 3;
export const DIMENSION_COVERAGE_MIN_CHARS = 200;
export const AI_SYNTHESIS_MAX_TOKENS = 3_000;
export const AI_SYNTHESIS_TEMPERATURE = 0.35;
export const AI_SYNTHESIS_TIMEOUT_MS = 30_000;
export const SYNTHESIS_SOURCE_CHARS = 600;
export const SYNTHESIS_MAX_SOURCES = 20;
export const AI_CONTRADICTION_MAX_TOKENS = 1_500;
export const AI_CONTRADICTION_TEMPERATURE = 0.15;
export const AI_CONTRADICTION_TIMEOUT_MS = 15_000;
export const CONTRADICTION_MAX_SOURCES = 15;
export const CONTRADICTION_SOURCE_CHARS = 400;
export const AI_PLANNING_TIMEOUT_MS = 10_000;
export const AI_PLANNING_MAX_TOKENS = 500;
export const AI_PLANNING_TEMPERATURE = 0.4;
export const AI_MIN_ACCEPTABLE_QUERIES = 4;
export const QUERY_LINE_MIN_LEN = 5;
export const QUERY_LINE_MAX_LEN = 160;
export const AI_DECOMPOSITION_MAX_TOKENS = 1_200;
export const AI_DECOMPOSITION_TEMPERATURE = 0.3;
export const AI_DECOMPOSITION_TIMEOUT_MS = 15_000;
export const DECOMPOSITION_MIN_WORKERS = 3;
export const DECOMPOSITION_MAX_WORKERS = 8;
export const AI_FINDINGS_SUMMARY_MAX_TOKENS = 600;
export const AI_FINDINGS_SUMMARY_TEMPERATURE = 0.2;
export const FINDINGS_SUMMARY_SOURCE_CHARS = 300;
export const DESCRIPTION_FALLBACK_CHARS = 250;
export const MIN_READABILITY_TEXT_LEN = 100;
export const OUTLINK_TEXT_MIN_LEN = 3;
export const OUTLINK_TEXT_MAX_LEN = 120;
export const DNS_RESOLVERS = ["1.1.1.1", "1.0.0.1", "8.8.8.8", "8.8.4.4", "9.9.9.9"];
export const CONTENT_LIMIT_MIN = 1_000;
export const CONTENT_LIMIT_MAX = 20_000;
export const CONTENT_LIMIT_EXTENDED = 20_000;
export const CONTENT_LIMIT_DEFAULT = 4_000;
export const MAX_SOURCES_MIN = 5;
export const MAX_SOURCES_MAX = 200;
export const MAX_SOURCES_DEFAULT = 25;
export const SEARCH_RESULTS_MIN = 1;
export const SEARCH_RESULTS_MAX = 20;
export const SEARCH_RESULTS_DEFAULT = 10;

export const SYSTEM_INSTRUCTIONS = `You are a core component of the Deep Swarm Research engine.
Your goal is to provide precise, high-quality research planning, task decomposition, and findings synthesis.
Be analytical and objective. Avoid conversational filler. Follow the requested output format strictly.
When generating search queries, ensure they are diverse, targeted, and effective for finding high-authority information.`;

export type DepthPreset = "shallow" | "standard" | "deep" | "deeper" | "exhaustive";

export interface DepthProfile {
  readonly depthRounds: number;
  readonly pageBudgetPerWorker: number;
  readonly pageBudgetPerGapWorker: number;
  readonly defaultContentLimit: number;
  readonly searchResultsPerQuery: number;
  readonly maxQueriesPerWorker: number;
  readonly maxPagesPerDomain: number;
  readonly maxLinksToEvaluate: number;
  readonly maxLinksToFollow: number;
  readonly maxOutlinksPerPage: number;
  readonly candidatePoolMultiplier: number;
  readonly workerConcurrency: number;
  readonly maxDecompositionWorkers: number;
  readonly maxGapFillQueries: number;
  readonly ddgRateLimitMs: number;
  readonly minRelevanceScore: number;
  readonly synthesisMaxSources: number;
  readonly synthesisSourceChars: number;
  readonly synthesisMaxTokens: number;
  readonly contradictionMaxSources: number;
  readonly stagnationThreshold: number;
  readonly searchPages: number;
  readonly searchLanes: number;
  readonly workerFanOut: number;
  readonly extraEngines: ReadonlyArray<string>;
  readonly linkCrawlDepth: number;
  readonly queryMutationThreshold: number;
}

export const DEPTH_PROFILES: Readonly<Record<DepthPreset, DepthProfile>> = {
  shallow: {
    depthRounds: 1, pageBudgetPerWorker: 5, pageBudgetPerGapWorker: 4, defaultContentLimit: 5_000,
    searchResultsPerQuery: 8, maxQueriesPerWorker: 3, maxPagesPerDomain: 3, maxLinksToEvaluate: 20,
    maxLinksToFollow: 2, maxOutlinksPerPage: 20, candidatePoolMultiplier: 2, workerConcurrency: 3,
    maxDecompositionWorkers: 6, maxGapFillQueries: 4, ddgRateLimitMs: 2_200, minRelevanceScore: 0.15,
    synthesisMaxSources: 15, synthesisSourceChars: 500, synthesisMaxTokens: 3_000, contradictionMaxSources: 10,
    stagnationThreshold: 1, searchPages: 1, searchLanes: 2, workerFanOut: 1,
    extraEngines: ["brave", "mojeek", "yandex"], linkCrawlDepth: 1, queryMutationThreshold: 2,
  },
  standard: {
    depthRounds: 3, pageBudgetPerWorker: 8, pageBudgetPerGapWorker: 6, defaultContentLimit: 6_000,
    searchResultsPerQuery: 10, maxQueriesPerWorker: 4, maxPagesPerDomain: 4, maxLinksToEvaluate: 30,
    maxLinksToFollow: 4, maxOutlinksPerPage: 30, candidatePoolMultiplier: 2, workerConcurrency: 3,
    maxDecompositionWorkers: 8, maxGapFillQueries: 5, ddgRateLimitMs: 2_000, minRelevanceScore: 0.13,
    synthesisMaxSources: 20, synthesisSourceChars: 500, synthesisMaxTokens: 4_000, contradictionMaxSources: 15,
    stagnationThreshold: 1, searchPages: 1, searchLanes: 2, workerFanOut: 1,
    extraEngines: ["brave", "mojeek", "searxng", "yandex"], linkCrawlDepth: 1, queryMutationThreshold: 2,
  },
  deep: {
    depthRounds: 5, pageBudgetPerWorker: 10, pageBudgetPerGapWorker: 8, defaultContentLimit: 8_000,
    searchResultsPerQuery: 12, maxQueriesPerWorker: 5, maxPagesPerDomain: 5, maxLinksToEvaluate: 40,
    maxLinksToFollow: 6, maxOutlinksPerPage: 40, candidatePoolMultiplier: 3, workerConcurrency: 4,
    maxDecompositionWorkers: 10, maxGapFillQueries: 6, ddgRateLimitMs: 1_800, minRelevanceScore: 0.1,
    synthesisMaxSources: 30, synthesisSourceChars: 400, synthesisMaxTokens: 5_000, contradictionMaxSources: 20,
    stagnationThreshold: 2, searchPages: 2, searchLanes: 3, workerFanOut: 2,
    extraEngines: ["brave", "mojeek", "searxng", "yandex"], linkCrawlDepth: 2, queryMutationThreshold: 3,
  },
  deeper: {
    depthRounds: 8, pageBudgetPerWorker: 15, pageBudgetPerGapWorker: 12, defaultContentLimit: 10_000,
    searchResultsPerQuery: 15, maxQueriesPerWorker: 6, maxPagesPerDomain: 6, maxLinksToEvaluate: 50,
    maxLinksToFollow: 8, maxOutlinksPerPage: 50, candidatePoolMultiplier: 3, workerConcurrency: 4,
    maxDecompositionWorkers: 12, maxGapFillQueries: 8, ddgRateLimitMs: 1_500, minRelevanceScore: 0.08,
    synthesisMaxSources: 40, synthesisSourceChars: 400, synthesisMaxTokens: 6_000, contradictionMaxSources: 25,
    stagnationThreshold: 2, searchPages: 2, searchLanes: 3, workerFanOut: 2,
    extraEngines: ["brave", "mojeek", "scholar", "searxng", "yandex"], linkCrawlDepth: 2, queryMutationThreshold: 3,
  },
  exhaustive: {
    depthRounds: 12, pageBudgetPerWorker: 20, pageBudgetPerGapWorker: 15, defaultContentLimit: 12_000,
    searchResultsPerQuery: 18, maxQueriesPerWorker: 8, maxPagesPerDomain: 8, maxLinksToEvaluate: 60,
    maxLinksToFollow: 10, maxOutlinksPerPage: 60, candidatePoolMultiplier: 4, workerConcurrency: 5,
    maxDecompositionWorkers: 14, maxGapFillQueries: 10, ddgRateLimitMs: 1_200, minRelevanceScore: 0.06,
    synthesisMaxSources: 50, synthesisSourceChars: 300, synthesisMaxTokens: 8_000, contradictionMaxSources: 30,
    stagnationThreshold: 3, searchPages: 3, searchLanes: 4, workerFanOut: 3,
    extraEngines: ["brave", "scholar", "searxng", "mojeek", "yandex"], linkCrawlDepth: 3, queryMutationThreshold: 4,
  },
};

export function getDepthProfile(preset: DepthPreset): DepthProfile {
  return DEPTH_PROFILES[preset];
}

export const DDG_RATE_LIMIT_MS = 2_000;
export const FETCH_TIMEOUT_MS = 10_000;
export const IMAGE_FETCH_TIMEOUT_MS = 8_000;
export const FETCH_MAX_RETRIES = 4;
export const FETCH_RETRY_DELAY_MS = 1500;
export const BATCH_INTER_FETCH_DELAY_MS = 300;
export const CACHE_FALLBACK_TIMEOUT_MS = 10_000;
export const WORKER_CONCURRENCY = 3;
export const MAX_PAGES_PER_DOMAIN = 3;
export const MIN_USEFUL_WORD_COUNT = 50;
export const MAX_LINKS_TO_EVALUATE = 40;
export const MAX_LINKS_TO_FOLLOW = 4;
export const MIN_RELEVANCE_SCORE = 0.15;
export const RELEVANCE_KEYWORD_FRACTION = 0.25;
export const RELEVANCE_TITLE_BONUS = 0.15;
export const RELEVANCE_SNIPPET_BONUS = 0.08;
export const FINGERPRINT_HEAD_WORDS = 30;
export const FINGERPRINT_MID_WORDS = 20;
export const FINGERPRINT_TAIL_WORDS = 20;
export const SCORE_WEIGHT_DOMAIN = 0.55;
export const SCORE_WEIGHT_URL_QUALITY = 0.25;
export const SCORE_WEIGHT_FRESHNESS = 0.2;
export const MIN_CANDIDATE_SCORE = 12;
export const MIN_URL_QUALITY = 8;
export const LINK_KEYWORD_BONUS = 20;
export const MAX_SENTENCE_CHARS = 600;
export const IDEAL_SENTENCE_LENGTH = 150;
export const CONSENSUS_OVERLAP_FRACTION = 0.4;
export const MAX_CONSENSUS_PHRASES = 10;
export const KEY_SENTENCES_PER_SOURCE = 3;
export const MAX_SOURCES_PER_DIMENSION = 5;
export const REPORT_SOURCE_PREVIEW_CHARS = 700;
export const MULTI_READ_BATCH_DELAY_MS = 500;
export const DIMENSION_COVERAGE_MIN_HITS = 3;
export const DIMENSION_COVERAGE_MIN_CHARS = 200;
export const AI_SYNTHESIS_MAX_TOKENS = 3_000;
export const AI_SYNTHESIS_TEMPERATURE = 0.35;
export const AI_SYNTHESIS_TIMEOUT_MS = 30_000;
export const SYNTHESIS_SOURCE_CHARS = 600;
export const SYNTHESIS_MAX_SOURCES = 20;
export const AI_CONTRADICTION_MAX_TOKENS = 1_500;
export const AI_CONTRADICTION_TEMPERATURE = 0.15;
export const AI_CONTRADICTION_TIMEOUT_MS = 15_000;
export const CONTRADICTION_MAX_SOURCES = 15;
export const CONTRADICTION_SOURCE_CHARS = 400;
export const AI_PLANNING_TIMEOUT_MS = 10_000;
export const AI_PLANNING_MAX_TOKENS = 500;
export const AI_PLANNING_TEMPERATURE = 0.4;
export const AI_MIN_ACCEPTABLE_QUERIES = 4;
export const QUERY_LINE_MIN_LEN = 5;
export const QUERY_LINE_MAX_LEN = 160;
export const AI_DECOMPOSITION_MAX_TOKENS = 1_200;
export const AI_DECOMPOSITION_TEMPERATURE = 0.3;
export const AI_DECOMPOSITION_TIMEOUT_MS = 15_000;
export const DECOMPOSITION_MIN_WORKERS = 3;
export const DECOMPOSITION_MAX_WORKERS = 8;
export const AI_FINDINGS_SUMMARY_MAX_TOKENS = 600;
export const AI_FINDINGS_SUMMARY_TEMPERATURE = 0.2;
export const FINDINGS_SUMMARY_SOURCE_CHARS = 300;
export const DESCRIPTION_FALLBACK_CHARS = 250;
export const MIN_READABILITY_TEXT_LEN = 100;
export const OUTLINK_TEXT_MIN_LEN = 3;
export const OUTLINK_TEXT_MAX_LEN = 120;
export const DNS_RESOLVERS = ["1.1.1.1", "1.0.0.1", "8.8.8.8", "8.8.4.4", "9.9.9.9"];
export const CONTENT_LIMIT_MIN = 1_000;
export const CONTENT_LIMIT_MAX = 20_000;
export const CONTENT_LIMIT_EXTENDED = 20_000;
export const CONTENT_LIMIT_DEFAULT = 4_000;
export const MAX_SOURCES_MIN = 5;
export const MAX_SOURCES_MAX = 200;
export const MAX_SOURCES_DEFAULT = 25;
export const SEARCH_RESULTS_MIN = 1;
export const SEARCH_RESULTS_MAX = 20;
export const SEARCH_RESULTS_DEFAULT = 10;

export const SYSTEM_INSTRUCTIONS = `You are a core component of the Deep Swarm Research engine.
Your goal is to provide precise, high-quality research planning, task decomposition, and findings synthesis.
Be analytical and objective. Avoid conversational filler. Follow the requested output format strictly.
When generating search queries, ensure they are diverse, targeted, and effective for finding high-authority information.`;