/**
 * Output diagnosis — a PURE, deterministic root-cause tree for Seedance output
 * quality failures. No I/O, no Date, no Math.random.
 *
 * Diagnose before rewriting: a generic/morphing/jittery/blocked/off-prompt output
 * has a root cause, and the fix is to remove the conflict, not add adjectives.
 * Each row carries a `tool` pointer to the existing vclaw remedy, so this is the
 * front door that unifies the harvested pieces (anti-slop, vfx, reference
 * transfer, retake, continuation, content-filter).
 *
 * The GENERAL output-quality rows, harvested from the MIT `Emily2040/seedance-2.0`
 * `seedance-troubleshoot` Diagnostic Tree (@63b32dc). The continuation/sequence
 * rows are intentionally NOT duplicated here — they live in
 * `continuation-handoff.ts` (`diagnoseContinuation`).
 */

export interface DiagnosisRow {
  symptom: string;
  cause: string;
  repair: string;
  /** The existing vclaw tool/remedy that addresses this failure, when one exists. */
  tool?: string;
}

export const OUTPUT_DIAGNOSIS: readonly DiagnosisRow[] = [
  {
    symptom: 'Product or face changes between frames',
    cause: 'The I2V prompt re-described visible identity or overloaded motion.',
    repair: 'Add preservation constraints; remove duplicate static detail; let the reference carry identity.',
    tool: 'prompt-lint (reference-transfer / proper-name leak) + Seedance Asset Library',
  },
  {
    symptom: 'Camera jumps or stutters',
    cause: 'Several incompatible moves, or no endpoint.',
    repair: 'Choose one move with a clear start and finish.',
    tool: 'multi-shot (shot-grammar movement) / cinematography',
  },
  {
    symptom: 'Generic output despite a long prompt',
    cause: 'Hollow style words and weak action diluted the attention budget.',
    repair: 'Replace evaluators with physical action, a source light, a material, and a sound.',
    tool: 'prompt-lint slop (anti-slop lexicon)',
  },
  {
    symptom: 'Motion ignored / subject static',
    cause: 'Static prompt or no visible consequence.',
    repair: 'Add an actor, a verb, timing, and a changed end state.',
    tool: 'multi-shot / filmmaking-prompts FRAME MAP',
  },
  {
    symptom: 'Lip-sync poor',
    cause: 'Moving head or camera, a long line, or an unassigned speaker.',
    repair: 'Lock framing, shorten the line, and assign the speaker on-screen.',
    tool: 'multi-shot --dialogue (speaker assignment)',
  },
  {
    symptom: 'VFX noisy or overlay-like',
    cause: 'The effect has no source, physics, or dissipation.',
    repair: 'Add a source, material, motion path, interaction, and a visible endpoint.',
    tool: 'multi-shot --vfx (vfx-register)',
  },
  {
    symptom: 'Prompt blocked / rejected',
    cause: 'Protected IP, a real-person likeness, graphic content, or bypass-like wording.',
    repair: 'Rewrite the intent in safe production language, without evasion.',
    tool: 'seedance content-filter (sanitizePrompt / preValidatePrompt)',
  },
  {
    symptom: 'Extension / continuation quality degrades',
    cause: 'No last-frame anchor, or too many new variables across continuations.',
    repair: 'Use the returned last frame as the next first frame and change one variable only.',
    tool: 'reroll-scene (retake protocol) + continuation-handoff',
  },
  {
    symptom: 'Audio reference ignored',
    cause: 'Competing video sound, no visual beat mapping, or an unsupported combination.',
    repair: 'Mute the competing video audio and map one visible event to the beat.',
    tool: 'audio-platform / assemble mix-plan',
  },
  {
    symptom: 'Text or logos break up',
    cause: 'Small text was asked to move or be redrawn during motion.',
    repair: 'Keep text static, centered, and protected; animate light around it, not through it.',
    tool: 'filmmaking-prompts LAST FRAME (no-on-screen-text guard)',
  },
  {
    symptom: 'Client QC fails on delivery',
    cause: 'Prompt output was treated as a final deliverable without post or QC.',
    repair: 'Route to delivery preflight, fix in post, or regenerate only the failing shot.',
    tool: 'assemble media-qc + reroll-scene',
  },
];

export const CONSERVATIVE_RETRY_PATTERN =
  '[Reference role if any]. Preserve [identity/product/environment] exactly. '
  + 'One visible action: [specific verb and consequence]. Camera: [single move]. '
  + 'Lighting: [physical source]. Sound: [ambient/SFX/dialogue]. '
  + 'Constraints: [what must not change].';

/**
 * Filter the diagnosis tree by a keyword over symptom/cause/repair
 * (case-insensitive). No query → every row (a fresh array copy).
 */
export function diagnoseOutput(query?: string): DiagnosisRow[] {
  if (!query || !query.trim()) return [...OUTPUT_DIAGNOSIS];
  const needle = query.toLowerCase().trim();
  return OUTPUT_DIAGNOSIS.filter((row) =>
    `${row.symptom} ${row.cause} ${row.repair}`.toLowerCase().includes(needle),
  );
}